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  • Books  (19)
  • Articles  (121,939)
  • Data
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  • 2005-2009
  • 1995-1999  (34,210)
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  • 1
    Keywords: Südostasien ; Erdölgeologie ; Erdöl ; fossile Brennstoffe ; Geologie ; Kohlenwasserstofflagerstätte ; Geology ; Petroleum ; Southeast Asia
    Description / Table of Contents: A. J. Fraser and S. J. Matthews: Petroleum geology of SE Asia: an introduction / Geological Society, London, Special Publications, 126:1-2, doi:10.1144/GSL.SP.1997.126.01.01 --- Chris Sladen: Energy trends in SE Asia / Geological Society, London, Special Publications, 126:3-10, doi:10.1144/GSL.SP.1997.126.01.02 --- Robert Hall: Cenozoic plate tectonic reconstructions of SE Asia / Geological Society, London, Special Publications, 126:11-23, doi:10.1144/GSL.SP.1997.126.01.03 --- S. P. Todd, M. E. Dunn, and A. J. G. Barwise: Characterizing petroleum charge systems in the tertiary of SE Asia / Geological Society, London, Special Publications, 126:25-47, doi:10.1144/GSL.SP.1997.126.01.04 --- Chris Sladen: Exploring the lake basins of east and southeast Asia / Geological Society, London, Special Publications, 126:49-76, doi:10.1144/GSL.SP.1997.126.01.05 --- Coen T. A. M. Leo: Exploration in the Gulf of Thailand in deltaic reservoirs, related to the Bongkot Field / Geological Society, London, Special Publications, 126:77-87, doi:10.1144/GSL.SP.1997.126.01.06 --- S. J. Matthews, A. J. Fraser, S. Lowe, S. P. Todd, and F. J. Peel: Structure, stratigraphy and petroleum geology of the SE Nam Con Son Basin, offshore Vietnam / Geological Society, London, Special Publications, 126:89-106, doi:10.1144/GSL.SP.1997.126.01.07 --- R. H. Worden, M. J. Mayall, and I. J. Evans: Predicting reservoir quality during exploration: lithic grains, porosity and permeability in Tertiary clastic rocks of the South China Sea basin / Geological Society, London, Special Publications, 126:107-115, doi:10.1144/GSL.SP.1997.126.01.08 --- M. J. Mayall, A. Bent, and D. M. Roberts: Miocene carbonate buildups offshore Socialist Republic of Vietnam / Geological Society, London, Special Publications, 126:117-120, doi:10.1144/GSL.SP.1997.126.01.09 --- A. Wight, H. Friestad, I. Anderson, P. Wicaksono, and C. H. Reminton: Exploration history of the offshore Southeast Sumatra PSC, Java Sea, Indonesia / Geological Society, London, Special Publications, 126:121-142, doi:10.1144/GSL.SP.1997.126.01.10 --- Craig Schiefelbein and Nick Cameron: Sumatra/Java oil families / Geological Society, London, Special Publications, 126:143-146, doi:10.1144/GSL.SP.1997.126.01.11 --- J. M. Cole and S. Crittenden: Early Tertiary basin formation and the development of Lacustrine and quasi-lacustrine/marine source rocks on the Sunda Shelf of SE Asia / Geological Society, London, Special Publications, 126:147-183, doi:10.1144/GSL.SP.1997.126.01.12 --- Alastair Beach, J. Lawson Brown, Paul J. Brockbank, Steven D. Knott, Jean E. McCallum, and Alastair I. Welbon: Fault seal analysis of SE Asian basins with examples from West Java / Geological Society, London, Special Publications, 126:185-194, doi:10.1144/GSL.SP.1997.126.01.13 --- D. J. Prosser and R. R. Carter: Permeability heterogeneity within the Jerudong Formation: an outcrop analogue for subsurface Miocene reservoirs in Brunei / Geological Society, London, Special Publications, 126:195-235, doi:10.1144/GSL.SP.1997.126.01.14 --- I. C. Mat-Zin and R. E. Swarbrick: The tectonic evolution and associated sedimentation history of Sarawak Basin, eastern Malaysia: a guide for future hydrocarbon exploration / Geological Society, London, Special Publications, 126:237-245, doi:10.1144/GSL.SP.1997.126.01.15 --- M. E. J. Wilson and D. W. J. Bosence: Platform-top and ramp deposits of the Tonasa Carbonate Platform, Sulawesi, Indonesia / Geological Society, London, Special Publications, 126:247-279, doi:10.1144/GSL.SP.1997.126.01.16 --- P. J. Boult: A review of the petroleum potential of Papua New Guinea with a focus on the eastern Papuan Basin and the Pale Sandstone as a potential reservoir fairway / Geological Society, London, Special Publications, 126:281-291, doi:10.1144/GSL.SP.1997.126.01.17 --- J. B. Blanche and J. D. Blanche: An overview of the hydrocarbon potential of the Spratly Islands archipelago and its implications for regional development / Geological Society, London, Special Publications, 126:293-310, doi:10.1144/GSL.SP.1997.126.01.18 --- Ian M. Longley: The tectonostratigraphic evolution of SE Asia / Geological Society, London, Special Publications, 126:311-339, doi:10.1144/GSL.SP.1997.126.01.19 --- D. Roques, S. J. Matthews, and C. Rangin: Constraints on strike-slip motion from seismic and gravity data along the Vietnam margin offshore Da Nang: implications for hydrocarbon prospectivity and opening of the East Vietnam Sea / Geological Society, London, Special Publications, 126:341-353, doi:10.1144/GSL.SP.1997.126.01.20 --- A. J. McCarthy and C. F. Elders: Cenozoic deformation in Sumatra: oblique subduction and the development of the Sumatran Fault System / Geological Society, London, Special Publications, 126:355-363, doi:10.1144/GSL.SP.1997.126.01.21 --- Chris Howells: Tertiary response to oblique subduction and indentation in Sumatra, Indonesia: new ideas for hydrocarbon exploration / Geological Society, London, Special Publications, 126:365-374, doi:10.1144/GSL.SP.1997.126.01.22 --- John L. C. Chambers and Timothy E. Daley: A tectonic model for the onshore Kutai Basin, East Kalimantan / Geological Society, London, Special Publications, 126:375-393, doi:10.1144/GSL.SP.1997.126.01.23 --- Steve J. Moss, John Chambers, Ian Cloke, Dharma Satria, Jason R. Ali, Simon Baker, John Milsom, and Andy Carter: New observations on the sedimentary and tectonic evolution of the Tertiary Kutai Basin, East Kalimantan / Geological Society, London, Special Publications, 126:395-416, doi:10.1144/GSL.SP.1997.126.01.24 --- John Milsom, Robert Holt, Dzazali Bin Ayub, and Ross Smail: Gravity anomalies and deep structural controls at the Sabah-Palawan margin, South China Sea / Geological Society, London, Special Publications, 126:417-427, doi:10.1144/GSL.SP.1997.126.01.25
    Pages: Online-Ressource (VI, 436 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 1897799918
    Language: English
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  • 2
    Keywords: fossile Brennstoffe ; Erdölgeologie ; Irische See
    Description / Table of Contents: V. S. Colter: The East Irish Sea Basin — from caterpillar to butterfly, a thirty-year metamorphosis / Geological Society, London, Special Publications, 124:1-9, doi:10.1144/GSL.SP.1997.124.01.01 --- Stratigraphy --- D. I. Jackson, H. Johnson, and N. J. P. Smith: Stratigraphical relationships and a revised lithostratigraphical nomenclature for the Carboniferous, Permian and Triassic rocks of the offshore East Irish Sea Basin / Geological Society, London, Special Publications, 124:11-32, doi:10.1144/GSL.SP.1997.124.01.02 --- Geoffrey Warrington: The Penarth Group-Lias Group succession (Late Triassic-Early Jurassic) in the East Irish Sea Basin and neighbouring areas: a stratigraphical review / Geological Society, London, Special Publications, 124:33-46, doi:10.1144/GSL.SP.1997.124.01.03 --- Regional Structure --- John C. W. Cope: The Mesozoic and Tertiary history of the Irish Sea / Geological Society, London, Special Publications, 124:47-59, doi:10.1144/GSL.SP.1997.124.01.04 --- R. W. England and N. J. Soper: Lower crustal structure of the East Irish Sea from deep seismic reflection data / Geological Society, London, Special Publications, 124:61-72, doi:10.1144/GSL.SP.1997.124.01.05 --- Paul F. Green, Ian R. Duddy, and Richard J. Bray: Variation in thermal history styles around the Irish Sea and adjacent areas: implications for hydrocarbon occurrence and tectonic evolution / Geological Society, London, Special Publications, 124:73-93, doi:10.1144/GSL.SP.1997.124.01.06 --- Basin Analysis --- Steven J. Maddox, Richard A. Blow, and Sean R. O’Brien: The geology and hydrocarbon prospectivity of the North Channel Basin / Geological Society, London, Special Publications, 124:95-111, doi:10.1144/GSL.SP.1997.124.01.07 --- Rob Shelton: Tectonic evolution of the Larne Basin / Geological Society, London, Special Publications, 124:113-133, doi:10.1144/GSL.SP.1997.124.01.08 --- D. G. Quirk and G. S. Kimbell: Structural evolution of the Isle of Man and central part of the Irish Sea / Geological Society, London, Special Publications, 124:135-159, doi:10.1144/GSL.SP.1997.124.01.09 --- P. W. Mikkelsen and J. B. Floodpage: The hydrocarbon potential of the Cheshire Basin / Geological Society, London, Special Publications, 124:161-183, doi:10.1144/GSL.SP.1997.124.01.10 --- A. Francis, M. Millwood Hargrave, P. Mulholland, and D. Williams: Real and relict direct hydrocarbon indicators in the East Irish Sea Basin / Geological Society, London, Special Publications, 124:185-194, doi:10.1144/GSL.SP.1997.124.01.11 --- Geochemistry --- James P. Armstrong, Janet Smith, Victor A. A. D’Elia, and Stephen P. Trueblood: The occurrence and correlation of oils and Namurian source rocks in the Liverpool Bay-North Wales area / Geological Society, London, Special Publications, 124:195-211, doi:10.1144/GSL.SP.1997.124.01.12 --- John Parnell: Fluid migration history in the north Irish Sea-North Channel region / Geological Society, London, Special Publications, 124:213-228, doi:10.1144/GSL.SP.1997.124.01.13 --- Caroline Mcgovern-Traa, Jyh-Yih Leu, W. Allan Hamilton, Iain S. C. Spark, and Ian T. M. Patey: The presence of sulphate-reducing bacteria in live drilling muds, core materials and reservoir formation brine from new oilfields / Geological Society, London, Special Publications, 124:229-236, doi:10.1144/GSL.SP.1997.124.01.14 --- Sedimentology --- Jillian Thompson and Neil S. Meadows: Clastic sabkhas and diachroneity at the top of the Sherwood Sandstone Group: East Irish Sea Basin / Geological Society, London, Special Publications, 124:237-251, doi:10.1144/GSL.SP.1997.124.01.15 --- Robert D. Herries and Greig Cowan: Challenging the ‘sheetflood’ myth: the role of water-table-controlled sabkha deposits in redefining the depositional model for the Ormskirk Sandstone Formation (Lower Triassic), East Irish Sea Basin / Geological Society, London, Special Publications, 124:253-276, doi:10.1144/GSL.SP.1997.124.01.16 --- Jim Ward: Early Dinantian evaporites of the Easton-1 well, Solway Basin, onshore, Cumbria, England / Geological Society, London, Special Publications, 124:277-296, doi:10.1144/GSL.SP.1997.124.01.17 --- Fault Analysis and Diagenesis --- R. A. Chadwick: Fault analysis of the Cheshire Basin, NW England / Geological Society, London, Special Publications, 124:297-313, doi:10.1144/GSL.SP.1997.124.01.18 --- Alastair Beach, J. Lawson Brown, Alastair I. Welbon, Jean E. McCallum, Paul Brockbank, and Steven Knott: Characteristics of fault zones in sandstones from NW England: application to fault transmissibility / Geological Society, London, Special Publications, 124:315-324, doi:10.1144/GSL.SP.1997.124.01.19 --- John Rowe and Stuart D. Burley: Faulting and porosity modification in the Sherwood Sandstone at Alderley Edge, northeastern Cheshire: an exhumed example of fault-related diagenesis / Geological Society, London, Special Publications, 124:325-352, doi:10.1144/GSL.SP.1997.124.01.20 --- P. J. Greenwood and S. M. Habesch: Diagenesis of the Sherwood Sandstone Group in the southern East Irish Sea Basin (Blocks 110/13, 110/14 and 110/15): constraints from preliminary isotopic and fluid inclusion studies / Geological Society, London, Special Publications, 124:353-371, doi:10.1144/GSL.SP.1997.124.01.21 --- Field Studies --- Greig Cowan and Joanna Bradney: Regional diagenetic controls on reservoir properties in the Millom accumulation: implications for field development / Geological Society, London, Special Publications, 124:373-386, doi:10.1144/GSL.SP.1997.124.01.22 --- R. A. Blow and M. Hardman: Calder Field appraisal well 110/7a-8, East Irish Sea Basin / Geological Society, London, Special Publications, 124:387-397, doi:10.1144/GSL.SP.1997.124.01.23 --- A. M. Yaliz: The Douglas Oil Field / Geological Society, London, Special Publications, 124:399-416, doi:10.1144/GSL.SP.1997.124.01.24 --- D. B. Haig, S. C. Pickering, and R. Probert: The Lennox oil and gas Field / Geological Society, London, Special Publications, 124:417-436, doi:10.1144/GSL.SP.1997.124.01.25
    Pages: Online-Ressource (VI, 447 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 1897799845
    Language: English
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  • 3
    Keywords: Erdgasgeologie ; Erdölgeologie ; Nordsee, Süd ; Geology ; North Sea ; Petroleum ; Petroleum in submerged lands
    Description / Table of Contents: Karen Ziegler, Peter Turner, and Stephen Daines: Introduction / Geological Society, London, Special Publications, 123:1-3, doi:10.1144/GSL.SP.1997.123.01.01 --- K. W. Glennie: History of exploration in the southern North Sea / Geological Society, London, Special Publications, 123:5-16, doi:10.1144/GSL.SP.1997.123.01.02 --- K. W. Glennie: Recent advances in understanding the southern North Sea Basin: a summary / Geological Society, London, Special Publications, 123:17-29, doi:10.1144/GSL.SP.1997.123.01.03 --- Gareth T. George and Jeremy K. Berry: Permian (Upper Rotliegend) synsedimentary tectonics, basin development and palaeogeography of the southern North Sea / Geological Society, London, Special Publications, 123:31-61, doi:10.1144/GSL.SP.1997.123.01.04 --- John Howell and Nigel Mountney: Climatic cyclicity and accommodation space in arid to semi-arid depositional systems: an example from the Rotliegend Group of the UK southern North Sea / Geological Society, London, Special Publications, 123:63-86, doi:10.1144/GSL.SP.1997.123.01.05 --- Gregory P. Leveille, Rob Knipe, Colin More, Dave Ellis, Graham Dudley, Greg Jones, Quentin J. Fisher, and Gareth Allinson: Compartmentalization of Rotliegendes gas reservoirs by sealing faults, Jupiter Fields area, southern North Sea / Geological Society, London, Special Publications, 123:87-104, doi:10.1144/GSL.SP.1997.123.01.06 --- Gregory P. Leveille, Tim J. Primmer, Graham Dudley, David Ellis, and Gareth J. Allinson: Diagenetic controls on reservoir quality in Permian Rotliegendes sandstones, Jupiter Fields area, southern North Sea / Geological Society, London, Special Publications, 123:105-122, doi:10.1144/GSL.SP.1997.123.01.07 --- Nick Cameron and Tom Ziegler: Probing the lower limits of a fairway: further pre-Permian potential in the southern North Sea / Geological Society, London, Special Publications, 123:123-141, doi:10.1144/GSL.SP.1997.123.01.08 --- David G. Quirk and John F. Aitken: The structure of the Westphalian in the northern part of the southern North Sea / Geological Society, London, Special Publications, 123:143-152, doi:10.1144/GSL.SP.1997.123.01.09 --- D. G. Quirk: Sequence stratigraphy of the Westphalian in the northern part of the Southern North Sea / Geological Society, London, Special Publications, 123:153-168, doi:10.1144/GSL.SP.1997.123.01.10 --- F. C. J. Mijnssen: Modelling of sandbody connectivity in the Schooner Field / Geological Society, London, Special Publications, 123:169-180, doi:10.1144/GSL.SP.1997.123.01.11 --- C. S. Yang and Y. A. Baumfalk: Application of high-frequency cycle analysis in high-resolution sequence stratigraphy / Geological Society, London, Special Publications, 123:181-203, doi:10.1144/GSL.SP.1997.123.01.12
    Pages: Online-Ressource (209 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 1897799829
    Language: English
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  • 4
    Unknown
    London : The Geological Society
    Keywords: Europa ; Kohle ; Kohlengeologie ; Technologie ; Coal ; Coal mines and mining ; Coal trade ; Europe ; Geology
    Description / Table of Contents: Dr Rod Gayer and Professor Jiri Pesek: Preface / Geological Society, London, Special Publications, 125:vii-viii, doi:10.1144/GSL.SP.1997.125.01.01 --- Regional Coal Reserves, Coal Basin Tectonics and Stratigraphy --- Josef Doruška: The Czech Republic energy policy: conception and implementation in a market economy / Geological Society, London, Special Publications, 125:1-2, doi:10.1144/GSL.SP.1997.125.01.02 --- J. Pešek and M. Dopita: Coal production and usage in the Czech Republic / Geological Society, London, Special Publications, 125:3-12, doi:10.1144/GSL.SP.1997.125.01.03 --- O. Kumpera: Controls on the evolution of the Namurian paralic basin, Bohemian Massif, Czech Republic / Geological Society, London, Special Publications, 125:13-27, doi:10.1144/GSL.SP.1997.125.01.04 --- Miroslav Krs, Jiří Pešek, Petr Pruner, Vladimír Skoček, and Jana Slepičková: The origin of magnetic remanence components of Westphalian C to Stephanian C sediments, West Bohemia: a record of waning Variscan tectonism / Geological Society, London, Special Publications, 125:29-47, doi:10.1144/GSL.SP.1997.125.01.05 --- Roland Dreesen, Dominique Bossiroy, Rudy Swennen, Jacques Thorez, Aurelio Fadda, Luciano Ottelli, and Eddy Keppens: A depositional and diagenetic model for the Eocene Sulcis coal basin of SW Sardinia / Geological Society, London, Special Publications, 125:49-75, doi:10.1144/GSL.SP.1997.125.01.06 --- H. İnaner and E. Nakoman: Turkish lignite deposits / Geological Society, London, Special Publications, 125:77-99, doi:10.1144/GSL.SP.1997.125.01.07 --- A. I. Karayigit and M. K. G. Whateley: The origin and properties of a coal seam associated with continental thin micritic limestones, Selimoglu-Divrigi, Turkey / Geological Society, London, Special Publications, 125:101-114, doi:10.1144/GSL.SP.1997.125.01.08 --- A. I. Karayigit and M. K. G. Whateley: Chemical characteristics, mineralogical composition and rank of high sulphur coking coals of Middle Miocene age in the Gökler coal field, Gediz, Turkey / Geological Society, London, Special Publications, 125:115-130, doi:10.1144/GSL.SP.1997.125.01.09 --- Nicolae Ţicleanu and Dorina Diaconiţǎ: The main coal facies and lithotypes of the Pliocene coal basin, Oltenia, Romania / Geological Society, London, Special Publications, 125:131-139, doi:10.1144/GSL.SP.1997.125.01.10 --- George D. Šiškov: Bulgarian low rank coals: geology and petrology / Geological Society, London, Special Publications, 125:141-148, doi:10.1144/GSL.SP.1997.125.01.11 --- I. E. Stukalova: Coal petrology and facies associations of the South Yakutian Coal Basin, Siberia / Geological Society, London, Special Publications, 125:149-160, doi:10.1144/GSL.SP.1997.125.01.12 --- Coal Petrology and Palaeontology --- Rod Gayer, Richard Fowler, and Gareth Davies: Coal rank variations with depth related to major thrust detachments in the South Wales coalfield: implications for fluid flow and mineralization / Geological Society, London, Special Publications, 125:161-178, doi:10.1144/GSL.SP.1997.125.01.13 --- J. Dvořák, J. Honěk, J. Pešek, and P. Valterová: Deep borehole evidence for a southward extension of the Early Namurian deposits near Němčičky, S. Moravia, Czech Republic: implication for rapid coalification / Geological Society, London, Special Publications, 125:179-193, doi:10.1144/GSL.SP.1997.125.01.14 --- Irena Kostova, Kalinka Markova, and Krasimir Kuntchev: Mössbauer spectroscopic investigation of low rank coal lithotypes / Geological Society, London, Special Publications, 125:195-199, doi:10.1144/GSL.SP.1997.125.01.15 --- P. I. Premović, R. S. Nikolić, and M. P. Premović: Comparison of solid state 13C NMR of algal coals/anthracite and charcoal-like fusinites: further evidence for graphitic domains / Geological Society, London, Special Publications, 125:201-205, doi:10.1144/GSL.SP.1997.125.01.16 --- Ivana Sýkorová, Jaroslav Černý, Helena Pavlíková, and Zuzana Weishauptová: Composition and properties of North Bohemian coals / Geological Society, London, Special Publications, 125:207-217, doi:10.1144/GSL.SP.1997.125.01.17 --- Maya Stefanova and Caroline Magnier: Aliphatic biological markers in Miocene Maritza-Iztok lignite, Bulgaria / Geological Society, London, Special Publications, 125:219-228, doi:10.1144/GSL.SP.1997.125.01.18 --- Svetilana Syabryaj: Floristic characters of the upper coal-bearing formation in the Transcarpathians / Geological Society, London, Special Publications, 125:229-236, doi:10.1144/GSL.SP.1997.125.01.19 --- Mineral Matter in Coal and the Environment --- S. R. H. Baqri: The distribution of sulphur in the Palaeocene coals of the Sindh Province of Pakistan / Geological Society, London, Special Publications, 125:237-243, doi:10.1144/GSL.SP.1997.125.01.20 --- Paul F. Cavender and D. Alan Spears: Sulphur distribution in a multi-bed seam / Geological Society, London, Special Publications, 125:245-260, doi:10.1144/GSL.SP.1997.125.01.21 --- Vladimír Bouška, Jiří Pešek, and Karel Žák: Values of δ34S in iron disulphides of the North Bohemian Lignite Basin, Czech Republic / Geological Society, London, Special Publications, 125:261-267, doi:10.1144/GSL.SP.1997.125.01.22 --- G. Jankes, O. Cvetković, and T. Glumičić: Determination of different forms of sulphur in Yugoslav soft brown coals / Geological Society, London, Special Publications, 125:269-272, doi:10.1144/GSL.SP.1997.125.01.23 --- P. I. Premović, N. D. Nikolić, M. S. Pavlović, LJ. S. Jovanović, and M. P. Premović: Origin of vanadium in coals: parts of the Western Kentucky (USA) No. 9 coal rich in vanadium / Geological Society, London, Special Publications, 125:273-286, doi:10.1144/GSL.SP.1997.125.01.24 --- D. A. Spears: Environmental impact of minerals in UK coals / Geological Society, London, Special Publications, 125:287-295, doi:10.1144/GSL.SP.1997.125.01.25 --- Mining Geophysics --- Vít Gregor and Antonín Těžký: A well logging method for the determination of the sulphur content of coal seams by means of deep gammaspectrometry / Geological Society, London, Special Publications, 125:297-307, doi:10.1144/GSL.SP.1997.125.01.26 --- Karel Mach: A logging correlation scheme for the Main coal seam of the North Bohemian brown coal basin, and the implications for the palaeogeographical development of the basin / Geological Society, London, Special Publications, 125:309-320, doi:10.1144/GSL.SP.1997.125.01.27 --- Karel Holub: Seismic monitoring for rockburst prevention in the Ostrava-Karviná Coalfield, Czech Republic / Geological Society, London, Special Publications, 125:321-328, doi:10.1144/GSL.SP.1997.125.01.28 --- Zdeněk Kaláb: An analysis of mining induced seismicity and its relationship to fault zones / Geological Society, London, Special Publications, 125:329-335, doi:10.1144/GSL.SP.1997.125.01.29 --- Stanislav Opluštil, Jiří Pešek, and Jiří Skopec: Comparison of structures derived from mine workings and those interpreted in seismic profiles: an example from the Kačice deposit, Kladno Mine, Bohemia / Geological Society, London, Special Publications, 125:337-347, doi:10.1144/GSL.SP.1997.125.01.30 --- Coal Technology and Coalbed Methane --- J. Barraza, M. Cloke, and A. Belghazi: Improvements in direct coal liquefaction using beneficiated coal fractions / Geological Society, London, Special Publications, 125:349-356, doi:10.1144/GSL.SP.1997.125.01.31 --- B. R. Aleksić, M. D. Ercegovac, O. G. Cvetković, B. Ž. Marković, T. L. Glumičić, B. D. Aleksić, and D. K. Vitorvić: Conversion of low rank coal into liquid fuels by direct hydrogenation / Geological Society, London, Special Publications, 125:357-363, doi:10.1144/GSL.SP.1997.125.01.32 --- R. Asmatulu, N. Acarkan, G. Onal, and M. S. Celik: Desulphurization of low-rank coals by low-temperature carbonization / Geological Society, London, Special Publications, 125:365-369, doi:10.1144/GSL.SP.1997.125.01.33 --- Michael K. G. Whateley, Zafer Gencer, and Ertem Tuncali: Amelioration of high organic sulphur coal for combustion in domestic stoves / Geological Society, London, Special Publications, 125:371-377, doi:10.1144/GSL.SP.1997.125.01.34 --- M. Stanojević, G. Jankes, M. Kuburović, M. Stanojević, and P. Blagojević: The use of pulverized lignite/natural gas mixed fuels in the high-temperature process of a cement rotary kiln / Geological Society, London, Special Publications, 125:379-383, doi:10.1144/GSL.SP.1997.125.01.35 --- Douchko Douchanov and Venecia Minkova: The possibility of underground gasification of Bulgarian Dobrudja’s coal / Geological Society, London, Special Publications, 125:385-390, doi:10.1144/GSL.SP.1997.125.01.36 --- E. L. Boardman and J. H. Rippon: Coalbed methane migration in and around fault zones / Geological Society, London, Special Publications, 125:391-408, doi:10.1144/GSL.SP.1997.125.01.37 --- V. Holub, M. Eliáš, P. Hrazdíra, and J. Franců: Geological research into gas sorbed in the coal seams of the Carboniferous in the Mšeno-Roudnice Basin, Czech Republic / Geological Society, London, Special Publications, 125:409-423, doi:10.1144/GSL.SP.1997.125.01.38 --- Ireneusz Grzybek, Lidia Gawlik, Wojciech Suwała, and Ryszard Kuzak: Method for estimating methane emissions from Polish coal mining / Geological Society, London, Special Publications, 125:425-434, doi:10.1144/GSL.SP.1997.125.01.39 --- G. Takla and Z. Vavrušák: Methane emission and its utilization from Ostrava-Karviná Collieries in the Upper Silesian coal basin, Czech Republic / Geological Society, London, Special Publications, 125:435-440, doi:10.1144/GSL.SP.1997.125.01.40
    Pages: Online-Ressource (VIII, 448 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 1897799861
    Language: English
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  • 5
    Keywords: tropochemical cell-twinning ; homologous series
    Description / Table of Contents: Part 1 / THE NATURE OF TROPOCHEMICAL CELL-TWINNING / Progress of study of known examples of homologous series based on the TCT mechanism --- Chapter 1 / INTRODUCTION / pp. 1-9 --- Chapter 2 / HETEROVALENT VACANCY-COUPLED SUBSTITUTION / pp. 11-13 --- Chapter 3 / HOMOLOGOUS SERIES IN THE PbS - Bi2S3 SYSTEM AND EXTENDED LILLIANITE HOMOLOGOUS SERIES / pp. 15-57 --- Chapter 4 / HOMOLOGOUS SERIES IN THE MnS - Y2S3 SYSTEM / pp. 59-62 --- Chapter 5 / THE ENSTATITE-IV HOMOLOGOUS SERIES, Me~x/3Mg~2/3Si(x-4)/3Ox or Me~x/3Li~4/3 Si(x-4)/3Ox,WITH Me = Mg, Sc and x = 88, 100, 112 or 124 / pp. 63-111 --- Chapter 6 / HOMOLOGOUS SERIES OF OXYBORATES RELATED TO PINAKIOLITE, (Mg, Mn2+, Fe3+) 1.9Mn3+O2[BO3] / pp. 113-159 --- Part II / NEW EXAMPLES OF HOMOLOGOUS SERIES / Based on the TCT mechanism --- Chapter 7 / THE PLAGIONITE HOMOLOGOUS SERIES, Pb3+2xSb8S15+2x, with x = 0, 1, 2, or 3 / pp. 161-213 --- Chapter 8 / HIGH- TEMPERATURE HOMOLOGOUS SERIES OF LEAD SULFANTIMONITES, xPbS·Sb2S3, WITH x = 2 or 3 / pp. 215-226 --- SUMMARY AND COMMENTS / pp. 227-231 --- APPENDICES --- 1. Contracted twins / pp. 233-234 --- 2. Characterization of distorted coordination polyhedra / pp. 235-251 --- 3. A collection of papers concerning new structure data of the crystalline phases cited or related to those in the text / pp. 253-314
    Pages: Online-Ressource (VII, 319 Seiten)
    ISBN: 4887041209
    Language: English
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  • 6
    Keywords: Ore deposits ; Volcanism
    Description / Table of Contents: W. S. Fyfe: Introductory remarks on the transport problem / Geological Society, London, Special Publications, 7:1-3, doi:10.1144/GSL.SP.1977.007.01.01 --- J. W. Elder: Model of hydrothermal ore genesis / Geological Society, London, Special Publications, 7:4-13, doi:10.1144/GSL.SP.1977.007.01.02 --- J. A. Pearce and G. H. Gale: Identification of ore-deposition environment from trace-element geochemistry of associated igneous host rocks / Geological Society, London, Special Publications, 7:14-24, doi:10.1144/GSL.SP.1977.007.01.03 --- S. M. F. Sheppard: Identification of the origin of oreforming solutions by the use of stable isotopes / Geological Society, London, Special Publications, 7:25-41, doi:10.1144/GSL.SP.1977.007.01.04 --- T. H. E. Heaton and S. M. F. Sheppard: Hydrogen and oxygen isotope evidence for sea-water-hydrothermal alteration and ore deposition, Troodos complex, Cyprus / Geological Society, London, Special Publications, 7:42-57, doi:10.1144/GSL.SP.1977.007.01.05 --- E. T. C. Spooner: Hydrodynamic model for the origin of the ophiolitic cupriferous pyrite ore deposits of Cyprus / Geological Society, London, Special Publications, 7:58-71, doi:10.1144/GSL.SP.1977.007.01.06 --- I. G. Gass: Origin and emplacement of ophiolites / Geological Society, London, Special Publications, 7:72-76, doi:10.1144/GSL.SP.1977.007.01.07 --- G. Constantinou: Hydrothermal alteration of the basaltic lavas of the Troodos Ophiolite Complex associated with the formation of the massive sulphide deposits / Geological Society, London, Special Publications, 7:77, doi:10.1144/GSL.SP.1977.007.01.08 --- A. H. F. Robertson and A. J. Fleet: Rare-earth element evidence for the genesis of the metalliferous sediments of Troodos, Cyprus / Geological Society, London, Special Publications, 7:78-79, doi:10.1144/GSL.SP.1977.007.01.09 --- D. S. Cronan, P. A. Smith, and R. D. Bignell: Modern submarine hydrothermal mineralization: examples from Santorini and the Red Sea / Geological Society, London, Special Publications, 7:80, doi:10.1144/GSL.SP.1977.007.01.10 --- M. S. Garson and A. H. G. Mitchell: Mineralization at destructive plate boundaries: a brief review / Geological Society, London, Special Publications, 7:81-97, doi:10.1144/GSL.SP.1977.007.01.11 --- J. P. Hunt: Porphyry copper deposits / Geological Society, London, Special Publications, 7:98, doi:10.1144/GSL.SP.1977.007.01.12 --- R. H. Sillitoe: Metallic mineralization affiliated to subaerial volcanism: a review / Geological Society, London, Special Publications, 7:99-116, doi:10.1144/GSL.SP.1977.007.01.13 --- J. N. Grant, C. Halls, W. Avila, and G. Avila: Igneous geology and the evolution of hydrothermal systems in some sub-volcanic tin deposits of Bolivia / Geological Society, London, Special Publications, 7:117-126, doi:10.1144/GSL.SP.1977.007.01.14 --- J. G. Thurlow: Occurrence, origin and significance of mechanically transported sulphide ores at Buchans, Newfoundland / Geological Society, London, Special Publications, 7:127, doi:10.1144/GSL.SP.1977.007.01.15 --- C. Halls, A. Reinsbakken, I. Ferriday, A. Haugen, and A. Rankin: Geological setting of the Skorovas orebody within the allochthonous volcanic stratigraphy of the Gjersvik Nappe, central Norway / Geological Society, London, Special Publications, 7:128-151, doi:10.1144/GSL.SP.1977.007.01.16 --- D. Williams, R. L. Stanton, and F. Rambaud: The Planes-San Antonio pyritic deposit of Rio Tinto, Spain: its nature, environment and genesis / Geological Society, London, Special Publications, 7:152, doi:10.1144/GSL.SP.1977.007.01.17 --- Takeo Sato: Kuroko deposits: their geology, geochemistry and origin / Geological Society, London, Special Publications, 7:153-161, doi:10.1144/GSL.SP.1977.007.01.18 --- J. H. Ford, D. C. Green, J. R. Hulston, I. H. Crick, and S. M. F. Sheppard: Stable isotope studies on Bougainville and in Matupi Harbour, New Britain, Papua New Guinea / Geological Society, London, Special Publications, 7:162, doi:10.1144/GSL.SP.1977.007.01.19 --- J. W. Platt: Volcanogenic mineralization at Avoca, Co. Wicklow, Ireland, and its regional implications / Geological Society, London, Special Publications, 7:163-170, doi:10.1144/GSL.SP.1977.007.01.20: Discussion / Geological Society, London, Special Publications, 7:171-174, doi:10.1144/GSL.SP.1977.007.01.21
    Pages: Online-Ressource (VI, 188 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 0900488336
    Language: English
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  • 7
    Keywords: Historische Geologie ; Ostafrika ; Paläontologie
    Description / Table of Contents: W. W. Bishop: Introduction / Geological Society, London, Special Publications, 6:NP, doi:10.1144/GSL.SP.1978.006.01.01 --- Sir Peter Kent: Historical background: Early exploration in the East African Rift—the Gregory Rift valley / Geological Society, London, Special Publications, 6:1-4, doi:10.1144/GSL.SP.1978.006.01.02 --- Part I. Frameworks: Structural—Volcanic—Geophysical --- E. Ronald Oxburgh: Rifting in east Africa and large-scale tectonic processes / Geological Society, London, Special Publications, 6:7-18, doi:10.1144/GSL.SP.1978.006.01.03 --- Robert M. Shackleton: Structural development of the East African Rift system / Geological Society, London, Special Publications, 6:19-28, doi:10.1144/GSL.SP.1978.006.01.04 --- Basil C. King: Structural and volcanic evolution of the Gregory Rift Valley / Geological Society, London, Special Publications, 6:29-54, doi:10.1144/GSL.SP.1978.006.01.05 --- Laurence A. J. Williams: Character of Quaternary volcanism in the Gregory Rift Valley / Geological Society, London, Special Publications, 6:55-69, doi:10.1144/GSL.SP.1978.006.01.06 --- M. Aftab Khan and Christopher J. Swain: Geophysical investigations and the Rift Valley geology of Kenya / Geological Society, London, Special Publications, 6:71-83, doi:10.1144/GSL.SP.1978.006.01.07 --- Part II. Background: Palaeontological and Archaeological Problems --- Andrew Hill: Taphonomical background to fossil man-problems in palaeoecology / Geological Society, London, Special Publications, 6:87-101, doi:10.1144/GSL.SP.1978.006.01.08 --- R. T. Shuey, Frank H. Brown, G. G. Eck, and F. Clark Howell: A statistical approach to temporal biostratigraphy / Geological Society, London, Special Publications, 6:103-124, doi:10.1144/GSL.SP.1978.006.01.09 --- Bernard A. Wood: Allometry and Hominid studies / Geological Society, London, Special Publications, 6:125-138, doi:10.1144/GSL.SP.1978.006.01.10 --- Glynn Ll. Isaac: The first geologists—the archaeology of the original rock breakers / Geological Society, London, Special Publications, 6:139-147, doi:10.1144/GSL.SP.1978.006.01.11 --- Part III. Regional Studies in the Gregory Rift Valley --- Mary D. Leakey: Olduvai Gorge 1911–75: a history of the investigations / Geological Society, London, Special Publications, 6:151-155, doi:10.1144/GSL.SP.1978.006.01.12 --- Mary D. Leakey, R. L. Hay, G. H. Curtis, R. E. Drake, M. K. Jackes, and T. D. White: Fossil hominids from the Laetolil Beds, Tanzania / Geological Society, London, Special Publications, 6:157-170, doi:10.1144/GSL.SP.1978.006.01.13 --- Robert M. Shackleton: Geological Map of the Olorgesailie Area, Kenya / Geological Society, London, Special Publications, 6:171-172, doi:10.1144/GSL.SP.1978.006.01.14 --- Glynn Ll. Isaac: The Olorgesailie Formation: Stratigraphy, tectonics and the palaeogeographic context of the Middle Pleistocene archaeological sites / Geological Society, London, Special Publications, 6:173-206, doi:10.1144/GSL.SP.1978.006.01.15 --- Gregory R. Chapman and Maureen Brook: Chronostratigraphy of the Baringo Basin, Kenya / Geological Society, London, Special Publications, 6:207-223, doi:10.1144/GSL.SP.1978.006.01.16 --- Peter Dagley, Alan E. Mussett, and H. C. Palmer: Preliminary observations on the palaeomagnetic stratigraphy of the area west of Lake Baringo, Kenya / Geological Society, London, Special Publications, 6:225-235, doi:10.1144/GSL.SP.1978.006.01.17 --- Martin H. L. Pickford: Geology, palaeoenvironments and vertebrate faunas of the mid-Miocene Ngorora Formation, Kenya / Geological Society, London, Special Publications, 6:237-262, doi:10.1144/GSL.SP.1978.006.01.18 --- Martin H. L. Pickford: Stratigraphy and mammalian palaeontology of the late-Miocene Lukeino Formation, Kenya / Geological Society, London, Special Publications, 6:263-278, doi:10.1144/GSL.SP.1978.006.01.19 --- Shirley Cameron Coryndon: Fossil Hippopotamidae from the Baringo Basin and relationships within the Gregory Rift, Kenya / Geological Society, London, Special Publications, 6:279-292, doi:10.1144/GSL.SP.1978.006.01.20 --- Alan W. Gentry: The fossil bovidae of the Baringo Area, Kenya / Geological Society, London, Special Publications, 6:293-308, doi:10.1144/GSL.SP.1978.006.01.21 --- William Bishop, Andrew Hill, and Martin Pickford: Chesowanja: a revised geological interpretation / Geological Society, London, Special Publications, 6:309-327, doi:10.1144/GSL.SP.1978.006.01.22 --- Walter W. Bishop: (A) Geological framework of the Kilombe Acheulian archaeological site, Kenya / Geological Society, London, Special Publications, 6:329-336, doi:10.1144/GSL.SP.1978.006.01.23 --- John A. J. Gowlett: (B) Kilombe—an Acheulian site complex in Kenya / Geological Society, London, Special Publications, 6:337-360, doi:10.1144/GSL.SP.1978.006.01.24 --- Peter W. J. Tallon: Geological setting of the hominid fossils and Acheulian artifacts from the Kapthurin Formation, Baringo District, Kenya / Geological Society, London, Special Publications, 6:361-373, doi:10.1144/GSL.SP.1978.006.01.25 --- Robert J. G. Savage and Peter G. Williamson: The early history of the Turkana Depression / Geological Society, London, Special Publications, 6:375-394, doi:10.1144/GSL.SP.1978.006.01.26 --- Carl F. Vondra and Bruce E. Bowen: Stratigraphy, sedimentary facies and paleoenvironments, East Lake Turkana, Kenya / Geological Society, London, Special Publications, 6:395-414, doi:10.1144/GSL.SP.1978.006.01.27 --- Ian C. Findlater: Isochronous surfaces within the Plio-Pleistocene sediments east of Lake Turkana / Geological Society, London, Special Publications, 6:415-420, doi:10.1144/GSL.SP.1978.006.01.28 --- Anna K. Behrensmeyer: Correlation of Plio-Pleistocene sequences in the northern Lake Turkana Basin: a summary of evidence and issues / Geological Society, London, Special Publications, 6:421-440, doi:10.1144/GSL.SP.1978.006.01.29 --- Frank J. Fitch, Paul J. Hooker, and John A. Miller: Geochronological problems and radioisotopic dating in the Gregory Rift Valley / Geological Society, London, Special Publications, 6:441-461, doi:10.1144/GSL.SP.1978.006.01.30 --- G. H. Curtis, R. E. Drake, T. E. Cerling, B. W. Cerling, and J. H. Hampel: Age of KBS Tuff in Koobi Fora Formation, East Lake, Turkana, Kenya / Geological Society, London, Special Publications, 6:463-469, doi:10.1144/GSL.SP.1978.003.01.31 --- Andrew Brock: Magneto-stratigraphy east of Lake Turkana and at Olduvai Gorge: a brief summary / Geological Society, London, Special Publications, 6:471, doi:10.1144/GSL.SP.1978.006.01.32 --- F. H. Brown, F. Clark Howell, and G. G. Eck: Observations on problems of correlation of late Cenozoic hominid-bearing formations in the North Lake Turkana Basin / Geological Society, London, Special Publications, 6:473-498, doi:10.1144/GSL.SP.1978.006.01.33 --- Yves Coppens: Evolution of the hominids and of their environment during the Plio-Pleistocene in the lower Omo Valley, Ethiopia / Geological Society, London, Special Publications, 6:499-506, doi:10.1144/GSL.SP.1978.006.01.34 --- Peter G. Williamson: Evidence for the major features and development of Rift Palaeolakes in the Neogene of East Africa from certain aspects of Lacustrine Mollusc assemblages / Geological Society, London, Special Publications, 6:507-527, doi:10.1144/GSL.SP.1978.006.01.35 --- Jack W. K. Harris and Ingrid Herbich: Aspects of early Pleistocene hominid behaviour east of Lake Turkana, Kenya / Geological Society, London, Special Publications, 6:529-547, doi:10.1144/GSL.SP.1978.006.01.36 --- Don C. Johanson, Maurice Taieb, B. T. Gray, and Yves Coppens: Geological framework of the Pliocene Hadar Formation (Afar, Ethiopia) with notes on paleontology including hominids / Geological Society, London, Special Publications, 6:549-564, doi:10.1144/GSL.SP.1978.006.01.37
    Pages: Online-Ressource (XII, 585 Seiten)
    ISBN: 186239086X
    Language: English
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  • 8
    Unknown
    Berlin ; Heidelberg : Springer
    Keywords: Gewässerschutz ; Hydrogeologie ; Hydrologie ; Muren ; Schlammströme ; debris flow ; hydrogeological risk ; hydrology ; muren ; torrent control devices
    Description / Table of Contents: The book gives a general overview of recent approaches to debris flows. Problems of both occurrences and dynamics of debris flow are treated, taking into account new results from theoretical and experimental research and field observations. Finally, the functioning of the main control devices are reconsidered in the light of the state of the art. Contents: Observation and Measurement for Debris Flow - Introduction, Prediction of Debris Flow for Warning and Evacuation, Large and Small Debris Flows - Occurence and Behaviour, Field Survey for Debris Flow in Volcanic Area.- Dynamics of Debris Flow - Introduction, A Comparison Between Gravity Flows of Dry Sand and Sand-Water Mixtures, Review Dynamic Modeling of Debris Flows, Dynamics of the Inertial and Viscous Debris Flows, Selected Notes on Debris Flow Dynamicss.- Control Measures for Debris Flow - Introduction, Development of New Methods for Countermeasures against Debris Flows, Torrent Check Dams as a Control Measure for Debris Flows, On the Dynamic Impact of Debris Flows.
    Pages: Online-Ressource (X, 226 Seiten)
    ISBN: 9783540497295
    Language: English
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  • 9
    Keywords: Manganerz ; Manganerzlagerstätte ; Mineralisation ; Geochemistry ; Geoquímica ; Manganese nodules ; Manganese ores ; Manganês ; Mineralogia
    Description / Table of Contents: Introduction --- Keith Nicholson, James R. Hein, Bernhard Bühn, and Somnath Dasgupta: Precambrian to modern manganese mineralization: Changes in ore type and depositional environment / Geological Society, London, Special Publications, 119:1-3, doi:10.1144/GSL.SP.1997.119.01.01 --- Review --- Supriya Roy: Genetic diversity of manganese deposition in the terrestrial geological record / Geological Society, London, Special Publications, 119:5-27, doi:10.1144/GSL.SP.1997.119.01.02 --- Precambrian Deposits --- G.P. Glasby: Fractionation of manganese from iron in Archaean and Proterozoic sedimentary ores / Geological Society, London, Special Publications, 119:29-42, doi:10.1144/GSL.SP.1997.119.01.03 --- Dmitri A. Kulik and Michael N. Korzhnev: Lithological and geochemical evidence of Fe and Mn pathways during deposition of Lower Proterozoic banded iron formation in the Krivoy Rog Basin (Ukraine) / Geological Society, London, Special Publications, 119:43-80, doi:10.1144/GSL.SP.1997.119.01.04 --- Bernhard Bühn and Ian G. Stanistreet: Insight into the enigma of Neoproterozoic manganese and iron formations from the perspective of supercontinental break-up and glaciation / Geological Society, London, Special Publications, 119:81-90, doi:10.1144/GSL.SP.1997.119.01.05 --- C. Manikyamba and S.M. Naqvi: Mineralogy and geochemistry of Archaean greenstone belt-hosted Mn formations and deposits of the Dharwar Craton: Redox potential of proto-oceans / Geological Society, London, Special Publications, 119:91-103, doi:10.1144/GSL.SP.1997.119.01.06 --- Joydip Mukhopadhyay, Asru K. Chaudhuri, and S. K. Chanda: Deep-water manganese deposits in the mid- to late Proterozoic Penganga Group of the Pranhita-Godavari Valley, South India / Geological Society, London, Special Publications, 119:105-115, doi:10.1144/GSL.SP.1997.119.01.07 --- Keith Nicholson, V. K. Nayak, and J. K. Nanda: Manganese ores of the Ghoriajhor-Monmunda area, Sundergarh District, Orissa, India: geochemical evidence for a mixed Mn source / Geological Society, London, Special Publications, 119:117-121, doi:10.1144/GSL.SP.1997.119.01.08 --- Cenozoic Deposits --- James R. Hein, Andrea Koschinsky, Peter Halbach, Frank T. Manheim, Michael Bau, Jung-Keuk Kang, and Naomi Lubick: Iron and manganese oxide mineralization in the Pacific / Geological Society, London, Special Publications, 119:123-138, doi:10.1144/GSL.SP.1997.119.01.09 --- D. S. Cronan: Some controls on the geochemical variability of manganese nodules with particular reference to the tropical South Pacific / Geological Society, London, Special Publications, 119:139-151, doi:10.1144/GSL.SP.1997.119.01.10 --- U. Von Stackelberg: Growth history of manganese nodules and crusts of the Peru Basin / Geological Society, London, Special Publications, 119:153-176, doi:10.1144/GSL.SP.1997.119.01.11 --- Akira Usui and Masao Someya: Distribution and composition of marine hydrogenetic and hydrothermal manganese deposits in the northwest Pacific / Geological Society, London, Special Publications, 119:177-198, doi:10.1144/GSL.SP.1997.119.01.12 --- B. Nagender Nath, W. L. Plüger, and I. Roelandts: Geochemical constraints on the hydrothermal origin of ferromanganese encrustations from the Rodriguez Triple Junction, Indian Ocean / Geological Society, London, Special Publications, 119:199-211, doi:10.1144/GSL.SP.1997.119.01.13 --- G. P. Glasby, E. M. Emelyanov, V. A. Zhamoida, G. N. Baturin, T. Leipe, R. Bahlo, and P. Bonacker: Environments of formation of ferromanganese concretions in the Baltic Sea: a critical review / Geological Society, London, Special Publications, 119:213-237, doi:10.1144/GSL.SP.1997.119.01.14 --- J. Rey, L. Somoza, J. Martínez-Frías, R. Benito, and S. Martín-Alfageme: Deception Island (Antarctica): a new target for exploration of Fe-Mn mineralization? / Geological Society, London, Special Publications, 119:239-251, doi:10.1144/GSL.SP.1997.119.01.15 --- A. Crespo and R. Lunar: Terrestrial hot-spring Co-rich Mn mineralization in the Pliocene-Quaternary Calatrava Region (central Spain) / Geological Society, London, Special Publications, 119:253-264, doi:10.1144/GSL.SP.1997.119.01.16 --- K. M. Michailidis, K. Nicholson, M. K. Nimfopoulos, and R. A. D. Pattrick: An EPMA and SEM study of the Mn-oxide mineralization of Kato Nevrokopi, Macedonia, northern Greece: Controls on formation of the Mn4+ oxides / Geological Society, London, Special Publications, 119:265-280, doi:10.1144/GSL.SP.1997.119.01.17 --- Hiroyuki Miura and Yu Hariya: Recent manganese oxide deposits in Hokkaido, Japan / Geological Society, London, Special Publications, 119:281-299, doi:10.1144/GSL.SP.1997.119.01.18 --- Geochemistry and Mineralogy --- Lev M. Gramm-Osipov: Formation of solid phases of manganese in oxygenated aquatic environments / Geological Society, London, Special Publications, 119:301-308, doi:10.1144/GSL.SP.1997.119.01.19 --- Keith Nicholson and Mark Eley: Geochemistry of manganese oxides: metal adsorption in freshwater and marine environments / Geological Society, London, Special Publications, 119:309-326, doi:10.1144/GSL.SP.1997.119.01.20 --- Somnath Dasgupta: P-T-X relationships during metamorphism of manganese-rich sediments: Current status and future studies / Geological Society, London, Special Publications, 119:327-337, doi:10.1144/GSL.SP.1997.119.01.21 --- M. K. Nimfopoulos, K. M. Michailidis, and G. Christofides: Zincian rancieite from the Kato Nevrokopi manganese deposits, Macedonia, northern Greece / Geological Society, London, Special Publications, 119:339-347, doi:10.1144/GSL.SP.1997.119.01.22 --- S. D. Gamblin and D. S. Urch: The determination of the valency of manganese in mineralogical and environmental samples by X-ray emission spectroscopy / Geological Society, London, Special Publications, 119:349-356, doi:10.1144/GSL.SP.1997.119.01.23
    Pages: Online-Ressource (VI, 370 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 1897799748
    Language: English
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  • 10
    Unknown
    Oxford, London, Edinburgh, Boston, Palo Alto, Melbourne : Blackwell Scientific Publications
    Keywords: Meeresgeologie ; Sedimentation ; Vulkanismus ; Tektonik
    Description / Table of Contents: Processes --- Richard V. Fisher: Submarine volcaniclastic rocks / Geological Society, London, Special Publications, 16:5-27, doi:10.1144/GSL.SP.1984.016.01.02 --- Eizo Yamada: Subaqueous pyroclastic flows: their development and their deposits / Geological Society, London, Special Publications, 16:29-35, doi:10.1144/GSL.SP.1984.016.01.03 --- Steven Carey and Haraldur Sigurdsson: A model of volcanogenic sedimentation in marginal basins / Geological Society, London, Special Publications, 16:37-58, doi:10.1144/GSL.SP.1984.016.01.04 --- Andrew D. Saunders and John Tarney: Geochemical characteristics of basaltic volcanism within back-arc basins / Geological Society, London, Special Publications, 16:59-76, doi:10.1144/GSL.SP.1984.016.01.05 --- J. A. Pearce, S. J. Lippard, and S. Roberts: Characteristics and tectonic significance of supra-subduction zone ophiolites / Geological Society, London, Special Publications, 16:77-94, doi:10.1144/GSL.SP.1984.016.01.06 --- Western Pacific Region --- E. C. Leitch: Marginal basins of the SW Pacific and the preservation and recognition of their ancient analogues: a review / Geological Society, London, Special Publications, 16:97-108, doi:10.1144/GSL.SP.1984.016.01.07 --- J. W. Cole: Taupo-Rotorua Depression: an ensialic marginal basin of North Island, New Zealand / Geological Society, London, Special Publications, 16:109-120, doi:10.1144/GSL.SP.1984.016.01.08 --- K. B. Lewis and H. M. Pantin: Intersection of a marginal basin with a continent: structure and sediments of the Bay of Plenty, New Zealand / Geological Society, London, Special Publications, 16:121-135, doi:10.1144/GSL.SP.1984.016.01.09 --- D. S. Cronan, R. Hodkinson, S. A. Moorby, G. P. Glasby, K. Knedler, and J. Thomson: Hydrothermal and volcaniclastic sedimentation on the Tonga-Kermadec Ridge and in its adjacent marginal basins / Geological Society, London, Special Publications, 16:137-149, doi:10.1144/GSL.SP.1984.016.01.10 --- H. Colley and W. H. Hindle: Volcano-tectonic evolution of Fiji and adjoining marginal basins / Geological Society, London, Special Publications, 16:151-162, doi:10.1144/GSL.SP.1984.016.01.11 --- I. E. Smith and J. S. Milsom: Late Cenozoic volcanism and extension in Eastern Papua / Geological Society, London, Special Publications, 16:163-171, doi:10.1144/GSL.SP.1984.016.01.12 --- P. M. Sychev and A. Y. Sharaskin: Heat flow and magmatism in the NW Pacific back-arc basins / Geological Society, London, Special Publications, 16:173-181, doi:10.1144/GSL.SP.1984.016.01.13 --- South America & Antarctica --- G. Åberg, L. Aguirre, B. Levi, J. O. Nyström, and L. Aguirre: Spreading-subsidence and generation of ensialic marginal basins: an example from the early Cretaceous of central Chile / Geological Society, London, Special Publications, 16:185-193, doi:10.1144/GSL.SP.1984.016.01.14 --- D. S. Bartholomew and J. Tarney: Crustal extension in the Southern Andes (45–46°S) / Geological Society, London, Special Publications, 16:195-205, doi:10.1144/GSL.SP.1984.016.01.15 --- B. C. Storey and D. I. M. Macdonald: Processes of formation and filling of a Mesozoic back-arc basin on the island of South Georgia / Geological Society, London, Special Publications, 16:207-218, doi:10.1144/GSL.SP.1984.016.01.16 --- G. W. Farquharson, R. D. Hamer, and J. R. Ineson: Proximal volcaniclastic sedimentation in a Cretaceous back-arc basin, northern Antarctic Peninsula / Geological Society, London, Special Publications, 16:219-229, doi:10.1144/GSL.SP.1984.016.01.17 --- Lower Palaeozoic --- D. Roberts, T. Grenne, and P. D. Ryan: Ordovician marginal basin development in the central Norwegian Caledonides / Geological Society, London, Special Publications, 16:233-244, doi:10.1144/GSL.SP.1984.016.01.18 --- B. P. Kokelaar, M. F. Howells, R. E. Bevins, R. A. Roach, and P. N. Dunkley: The Ordovician marginal basin of Wales / Geological Society, London, Special Publications, 16:245-269, doi:10.1144/GSL.SP.1984.016.01.19 --- B. E. Lorenz: Mud-magma interactions in the Dunnage Mélange, Newfoundland / Geological Society, London, Special Publications, 16:271-277, doi:10.1144/GSL.SP.1984.016.01.20 --- Guoqiang Pan: The Late Precambrian and early Palaeozoic marginal basin of South China / Geological Society, London, Special Publications, 16:279-284, doi:10.1144/GSL.SP.1984.016.01.21 --- Zhijin Zhang: Lower Palaeozoic volcanism of northern Qilianshan, NW China / Geological Society, London, Special Publications, 16:285-289, doi:10.1144/GSL.SP.1984.016.01.22 --- B. P. Kokelaar, M. F. Howells, R. E. Bevins, and R. A. Roach: Volcanic and associated sedimentary and tectonic processes in the Ordovician marginal basin of Wales: a field guide / Geological Society, London, Special Publications, 16:291-322, doi:10.1144/GSL.SP.1984.016.01.23
    Pages: Online-Ressource (322 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 0632010738
    Language: English
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  • 11
    Unknown
    Oxford, London, Edinburgh, Boston, Melbourne, Palo Alto : Blackwell Scientific Publications
    Keywords: Variszische Faltungsära ; Atlantischer Raum Nord ; Historische Geologie
    Description / Table of Contents: Mainland Europe --- K. Weber: Variscan events: early Palaeozoic continental rift metamorphism and late Palaeozoic crustal shortening / Geological Society, London, Special Publications, 14:3-22, doi:10.1144/GSL.SP.1984.014.01.02 --- R. Meissner, M. Springer, and E. Flüh: Tectonics of the Variscides in North-Western Germany based on seismic reflection measurements / Geological Society, London, Special Publications, 14:23-32, doi:10.1144/GSL.SP.1984.014.01.03 --- Wolfgang Franke: Late events in the tectonic history of the Saxothuringian zone / Geological Society, London, Special Publications, 14:33-45, doi:10.1144/GSL.SP.1984.014.01.04 --- J. P. Burg, Ph. Matte, A. Leyreloup, and J. Marchand: Inverted metamorphic zonation and large-scale thrusting in the Variscan Belt: an example in the French Massif Central / Geological Society, London, Special Publications, 14:47-61, doi:10.1144/GSL.SP.1984.014.01.05 --- Jean-Michel Quenardel and Patrick Rolin: Palaeozoic evolution of the Plateau d’Aigurande (NW Massif Central, France) / Geological Society, London, Special Publications, 14:63-70, doi:10.1144/GSL.SP.1984.014.01.06 --- S. C. Matthews: Northern margins of the Variscides in the North Atlantic region: comments on the tectonic context of the problem / Geological Society, London, Special Publications, 14:71-85, doi:10.1144/GSL.SP.1984.014.01.07 --- Britain --- M. P. Coward and S. Smallwood: An interpretation of the Variscan tectonics of SW Britain / Geological Society, London, Special Publications, 14:89-102, doi:10.1144/GSL.SP.1984.014.01.08 --- B. E. Leveridge, M. T. Holder, and G. A. Day: Thrust nappe tectonics in the Devonian of south Cornwall and the western English Channel / Geological Society, London, Special Publications, 14:103-112, doi:10.1144/GSL.SP.1984.014.01.09 --- T. J. Chapman, R. L. Fry, and P. T. Heavey: A structural cross-section through SW Devon / Geological Society, London, Special Publications, 14:113-118, doi:10.1144/GSL.SP.1984.014.01.10 --- J. W. F. Edwards: Interpretations of seismic and gravity surveys over the eastern part of the Cornubian platform / Geological Society, London, Special Publications, 14:119-124, doi:10.1144/GSL.SP.1984.014.01.11 --- Robert M. Shackleton: Thin-skinned tectonics, basement control and the Variscan front / Geological Society, London, Special Publications, 14:125-129, doi:10.1144/GSL.SP.1984.014.01.12 --- Russell S. Arthurton: The Ribblesdale fold belt, NW England—a Dinantian-early Namurian dextral shear zone / Geological Society, London, Special Publications, 14:131-138, doi:10.1144/GSL.SP.1984.014.01.13 --- M. F. Critchley: Variscan tectonics of the Alston block, northern England / Geological Society, London, Special Publications, 14:139-146, doi:10.1144/GSL.SP.1984.014.01.14 --- Ireland --- David J. Sanderson: Structural variation across the northern margin of the Variscides in NW Europe / Geological Society, London, Special Publications, 14:149-165, doi:10.1144/GSL.SP.1984.014.01.15 --- M. A. Cooper, D. Collins, M. Ford, F. X. Murphy, and P. M. Trayner: Structural style, shortening estimates and the thrust front of the Irish Variscides / Geological Society, London, Special Publications, 14:167-175, doi:10.1144/GSL.SP.1984.014.01.16 --- M. D. Max and J. P. Lefort: Does the Variscan front in Ireland follow a dextral shear zone? / Geological Society, London, Special Publications, 14:177-183, doi:10.1144/GSL.SP.1984.014.01.17 --- D. W. Coller: Variscan structures in the Upper Palaeozoic rocks of west central Ireland / Geological Society, London, Special Publications, 14:185-194, doi:10.1144/GSL.SP.1984.014.01.18 --- North America --- N. Rast: The Alleghenian orogeny in eastern North America / Geological Society, London, Special Publications, 14:197-217, doi:10.1144/GSL.SP.1984.014.01.19 --- Jean-Pierre Lefort and Richard T. Haworth: Geophysical evidence for the extension of the Variscan front on to the Canadian continental margin: geodynamic and palaeogeographic consequences / Geological Society, London, Special Publications, 14:219-231, doi:10.1144/GSL.SP.1984.014.01.20 --- Sharon Mosher and Nicholas Rast: The deformation and metamorphism of Carboniferous rocks in Maritime Canada and New England / Geological Society, London, Special Publications, 14:233-243, doi:10.1144/GSL.SP.1984.014.01.21 --- R. P. Wintsch and J.-P. Lefort: A clockwise rotation of Variscan strain orientation in SE New England and regional implications / Geological Society, London, Special Publications, 14:245-251, doi:10.1144/GSL.SP.1984.014.01.22 --- J. A. Brewer: Clues to the deep structure of the European Variscides from crustal seismic profiling in North America / Geological Society, London, Special Publications, 14:253-263, doi:10.1144/GSL.SP.1984.014.01.23
    Pages: Online-Ressource (IX, 270 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 063201203X
    Language: English
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  • 12
    Unknown
    Oxford, London, Edinburgh, Boston, Palo Alto, Melbourne : Blackwell Scientific Publications
    Keywords: Mittelmeer Ost ; Historische Geologie
    Description / Table of Contents: Recent research developments / Geological Society, London, Special Publications, 17:xi-xii, doi:10.1144/GSL.SP.1984.017.01.01 --- A. H. F. Robertson and J. E. Dixon: Introduction: aspects of the geological evolution of the Eastern Mediterranean / Geological Society, London, Special Publications, 17:1-74, doi:10.1144/GSL.SP.1984.017.01.02 --- 1. Palaeotethys --- Editor’s introduction / Geological Society, London, Special Publications, 17:75-76, doi:10.1144/GSL.SP.1984.017.01.03 --- A. M. C. Şengör, Y. Yılmaz, and O. Sungurlu: Tectonics of the Mediterranean Cimmerides: nature and evolution of the western termination of Palaeo-Tethys / Geological Society, London, Special Publications, 17:77-112, doi:10.1144/GSL.SP.1984.017.01.04 --- Olivier Monod and Ergün Akay: Evidence for a Late Triassic-Early Jurassic orogenic event in the Taurides / Geological Society, London, Special Publications, 17:113-122, doi:10.1144/GSL.SP.1984.017.01.05 --- I. E. Kerey: Facies and tectonic setting of the Upper Carboniferous rocks of Northwestern Turkey / Geological Society, London, Special Publications, 17:123-128, doi:10.1144/GSL.SP.1984.017.01.06 --- E. Demirtaşh: Stratigraphic evidence of Variscan and early Alpine tectonics in Southern Turkey / Geological Society, London, Special Publications, 17:129-145, doi:10.1144/GSL.SP.1984.017.01.07 --- 2. Neoththys --- Levant and North African offshore: Editor’s introduction / Geological Society, London, Special Publications, 17:147-149, doi:10.1144/GSL.SP.1984.017.01.08 --- M. Delaune-Mayere: Evolution of a Mesozoic passive continental margin: Baër-Bassit (NW Syria) / Geological Society, London, Special Publications, 17:151-159, doi:10.1144/GSL.SP.1984.017.01.09 --- G. Sestini: Tectonic and sedimentary history of the NE African margin (Egypt—Libya) / Geological Society, London, Special Publications, 17:161-175, doi:10.1144/GSL.SP.1984.017.01.10 --- Gdaliahu Gvirtzman and Tuvia Weissbrod: The Hercynian Geanticline of Helez and the Late Palaeozoic history of the Levant / Geological Society, London, Special Publications, 17:177-186, doi:10.1144/GSL.SP.1984.017.01.11 --- Z. Garfunkel and B. Derin: Permian-early Mesozoic tectonism and continental margin formation in Israel and its implications for the history of the Eastern Mediterranean / Geological Society, London, Special Publications, 17:187-201, doi:10.1144/GSL.SP.1984.017.01.12 --- Yehezkeel Druckman: Evidence for Early-Middle Triassic faulting and possible rifting from the Helez Deep Borehole in the coastal plain of Israel / Geological Society, London, Special Publications, 17:203-212, doi:10.1144/GSL.SP.1984.017.01.13 --- Abdulkader M. Abed: Emergence of Wadi Mujib (Central Jordan) during Lower Cenomanian time and its regional tectonic implications / Geological Society, London, Special Publications, 17:213-216, doi:10.1144/GSL.SP.1984.017.01.14 --- F. Hirsch: The Arabian sub-plate during the Mesozoic / Geological Society, London, Special Publications, 17:217-223, doi:10.1144/GSL.SP.1984.017.01.15 --- Michel Delaloye and Jean-Jacques Wagner: Ophiolites and volcanic activity near the western edge of the Arabian plate / Geological Society, London, Special Publications, 17:225-233, doi:10.1144/GSL.SP.1984.017.01.16 --- 3. Neotethys: Turkey --- Editor’s introduction / Geological Society, London, Special Publications, 17:235-240, doi:10.1144/GSL.SP.1984.017.01.17 --- A. Poisson: The extension of the Ionian trough into southwestern Turkey / Geological Society, London, Special Publications, 17:241-249, doi:10.1144/GSL.SP.1984.017.01.18 --- A. H. F. Robertson and N. H. Woodcock: The SW segment of the Antalya Complex, Turkey as a Mesozoic-Tertiary Tethyan continental margin / Geological Society, London, Special Publications, 17:251-271, doi:10.1144/GSL.SP.1984.017.01.19 --- J. W. F. Waldron: Structural history of the Antalya Complex in the ‘Isparta angle’, Southwest Turkey / Geological Society, London, Special Publications, 17:273-286, doi:10.1144/GSL.SP.1984.017.01.20 --- A. B. Hayward: Miocene clastic sedimentation related to the emplacement of the Lycian Nappes and the Antalya Complex, S.W. Turkey / Geological Society, London, Special Publications, 17:287-300, doi:10.1144/GSL.SP.1984.017.01.21 --- Hubert Whitechurch, Thierry Juteau, and Raymond Montigny: Role of the Eastern Mediterranean ophiolites (Turkey, Syria, Cyprus) in the history of the Neo-Tethys / Geological Society, London, Special Publications, 17:301-317, doi:10.1144/GSL.SP.1984.017.01.22 --- Ingrid Reuber: Mylonitic ductile shear zones within tectonites and cumulates as evidence for an oceanic transform fault in the Antalya ophiolite, S.W. Turkey / Geological Society, London, Special Publications, 17:319-334, doi:10.1144/GSL.SP.1984.017.01.23 --- Pınar O. Yılmaz: Fossil and K-Ar data for the age of the Antalya complex, S W Turkey / Geological Society, London, Special Publications, 17:335-347, doi:10.1144/GSL.SP.1984.017.01.24 --- L. E. Ricou, J. Marcoux, and H. Whitechurch: The Mesozoic organization of the Taurides: one or several ocean basins? / Geological Society, London, Special Publications, 17:349-359, doi:10.1144/GSL.SP.1984.017.01.25 --- A. Michard, H. Whitechurch, L. E. Ricou, R. Montigny, and E. Yazgan: Tauric subduction (Malatya-Elazıǧ provinces) and its bearing on tectonics of the Tethyan realm in Turkey / Geological Society, London, Special Publications, 17:361-373, doi:10.1144/GSL.SP.1984.017.01.26 --- G. Aktaş and A. H. F. Robertson: The Maden Complex, SE Turkey: evolution of a Neotethyan active margin / Geological Society, London, Special Publications, 17:375-402, doi:10.1144/GSL.SP.1984.017.01.27 --- Cahit Helvaci and William L. Griffin: Rb-Sr geochronology of the Bitlis Massif, Avnik (Bingöl) area, S.E. Turkey / Geological Society, London, Special Publications, 17:403-413, doi:10.1144/GSL.SP.1984.017.01.28 --- Ömer T. Akıncı: The Eastern Pontide volcano-sedimentary belt and associated massive sulphide deposits / Geological Society, London, Special Publications, 17:415-428, doi:10.1144/GSL.SP.1984.017.01.29 --- A. I. Okay and N. Özgül: HP/LT metamorphism and the structure of the Alanya Massif, Southern Turkey: an allochthonous composite tectonic sheet / Geological Society, London, Special Publications, 17:429-439, doi:10.1144/GSL.SP.1984.017.01.30 --- Teoman N. Norman: The role of the Ankara Melange in the development of Anatolia (Turkey) / Geological Society, London, Special Publications, 17:441-447, doi:10.1144/GSL.SP.1984.017.01.31 --- Ayla Tankut: Basic and ultrabasic rocks from the Ankara Melange, Turkey / Geological Society, London, Special Publications, 17:449-454, doi:10.1144/GSL.SP.1984.017.01.32 --- A. I. Okay: Distribution and characteristics of the north-west Turkish blueschists / Geological Society, London, Special Publications, 17:455-466, doi:10.1144/GSL.SP.1984.017.01.33 --- N. Görür, F.Y. Oktay, İ. Seymen, and A. M. C. Şengör: Palaeotectonic evolution of the Tuzgölü basin complex, Central Turkey: sedimentary record of a Neo-Tethyan closure / Geological Society, London, Special Publications, 17:467-482, doi:10.1144/GSL.SP.1984.017.01.34 --- J. P. Lauer: Geodynamic evolution of Turkey and Cyprus based on palaeomagnetic data / Geological Society, London, Special Publications, 17:483-491, doi:10.1144/GSL.SP.1984.017.01.35 --- 4. Neotethys: Greece and the Balkans --- Editor’s introduction / Geological Society, London, Special Publications, 17:493-498, doi:10.1144/GSL.SP.1984.017.01.36 --- Robert Hall, M. G. Audley-Charles, and D. J. Carter: The significance of Crete for the evolution of the Eastern Mediterranean / Geological Society, London, Special Publications, 17:499-516, doi:10.1144/GSL.SP.1984.017.01.37 --- Michel Bonneau: Correlation of the Hellenide nappes in the south-east Aegean and their tectonic reconstruction / Geological Society, London, Special Publications, 17:517-527, doi:10.1144/GSL.SP.1984.017.01.38 --- M. Okrusch, P. Richter, and G. Katsikatsos: High-pressure rocks of Samos, Greece / Geological Society, London, Special Publications, 17:529-536, doi:10.1144/GSL.SP.1984.017.01.39 --- Christos G. Katagas: High pressure metamorphism in Ghiaros Island, Cyclades, Greece / Geological Society, London, Special Publications, 17:537-544, doi:10.1144/GSL.SP.1984.017.01.40 --- John Ridley: The significance of deformation associated with blueschist facies metamorphism on the Aegean island of Syros / Geological Society, London, Special Publications, 17:545-550, doi:10.1144/GSL.SP.1984.017.01.41 --- Dimitrios J. Papanikolaou: The three metamorphic belts of the Hellenides: a review and a kinematic interpretation / Geological Society, London, Special Publications, 17:551-561, doi:10.1144/GSL.SP.1984.017.01.42 --- Georgia Pe-Piper and David J. W. Piper: Tectonic setting of the Mesozoic Pindos basin of the Peloponnese, Greece / Geological Society, London, Special Publications, 17:563-567, doi:10.1144/GSL.SP.1984.017.01.43 --- Alan E. S. Kemp and Andrew M. McCaig: Origins and significance of rocks in an imbricate thrust zone beneath the Pindos ophiolite, northwestern Greece / Geological Society, London, Special Publications, 17:569-580, doi:10.1144/GSL.SP.1984.017.01.44 --- D. Mountrakis: Structural evolution of the Pelagonian Zone in Northwestern Macedonia, Greece / Geological Society, London, Special Publications, 17:581-590, doi:10.1144/GSL.SP.1984.017.01.45 --- Volker Jacobshagen and Eckard Wallbrecher: Pre-Neogene nappe structure and metamorphism of the North Sporades and the southern Pelion peninsula / Geological Society, London, Special Publications, 17:591-602, doi:10.1144/GSL.SP.1984.017.01.46 --- J. E. Dixon and S. Dimitriadis: Metamorphosed ophiolitic rocks from the Serbo-Macedonian Massif, near Lake Volvi, North-east Greece / Geological Society, London, Special Publications, 17:603-618, doi:10.1144/GSL.SP.1984.017.01.47 --- J. G. Spray, J. Bébien, D. C. Rex, and J. C. Roddick: Age constraints on the igneous and metamorphic evolution of the Hellenic-Dinaric ophiolites / Geological Society, London, Special Publications, 17:619-627, doi:10.1144/GSL.SP.1984.017.01.48 --- A. G. Smith and J. G. Spray: A half-ridge transform model for the Hellenic-Dinaric ophiolites / Geological Society, London, Special Publications, 17:629-644, doi:10.1144/GSL.SP.1984.017.01.49 --- Emö Márton: Tectonic implications of palaeomagnetic results for the Carpatho-Balkan and adjacent areas / Geological Society, London, Special Publications, 17:645-654, doi:10.1144/GSL.SP.1984.017.01.50 --- 5. Neogene --- Editor’s introduction / Geological Society, London, Special Publications, 17:655-658, doi:10.1144/GSL.SP.1984.017.01.51 --- Fritz F. Steininger and Fred Rögl: Paleogeography and palinspastic reconstruction of the Neogene of the Mediterranean and Paratethys / Geological Society, London, Special Publications, 17:659-668, doi:10.1144/GSL.SP.1984.017.01.52 --- Catherine Kissel, Carlo Laj, and Marc Jamet: Palaeomagnetic evidence of Miocene and Pliocene rotational deformations of the Aegean Area / Geological Society, London, Special Publications, 17:669-679, doi:10.1144/GSL.SP.1984.017.01.53 --- D. Kondopoulou and J. P. Lauer: Palaeomagnetic data from Tertiary units of the north Aegean zone / Geological Society, London, Special Publications, 17:681-686, doi:10.1144/GSL.SP.1984.017.01.54 --- M. Fytikas, F. Innocenti, P. Manetti, A. Peccerillo, R. Mazzuoli, and L. Villari: Tertiary to Quaternary evolution of volcanism in the Aegean region / Geological Society, London, Special Publications, 17:687-699, doi:10.1144/GSL.SP.1984.017.01.55 --- M. L. Myrianthis: Graben formation and associated seismicity in the Gulf of Korinth (Central Greece) / Geological Society, London, Special Publications, 17:701-707, doi:10.1144/GSL.SP.1984.017.01.56 --- Nicolas Lybéris: Tectonic evolution of the North Aegean trough / Geological Society, London, Special Publications, 17:709-725, doi:10.1144/GSL.SP.1984.017.01.57 --- Xavier Le Pichon, Nicolas Lybéris, and Francis Alvarez: Subsidence history of the North Aegean Trough / Geological Society, London, Special Publications, 17:727-741, doi:10.1144/GSL.SP.1984.017.01.58 --- James Jackson and Dan McKenzie: Rotational mechanisms of active deformation in Greece and Iran / Geological Society, London, Special Publications, 17:743-754, doi:10.1144/GSL.SP.1984.017.01.59 --- John Ridley: Listric normal faulting and the reconstruction of the synmetamorphic structural pile of the Cyclades / Geological Society, London, Special Publications, 17:755-761, doi:10.1144/GSL.SP.1984.017.01.60 --- A. Aykut Barka and Paul L. Hancock: Neotectonic deformation patterns in the convex-northwards arc of the North Anatolian fault zone / Geological Society, London, Special Publications, 17:763-774, doi:10.1144/GSL.SP.1984.017.01.61 --- A. M. Quennell: The Western Arabia rift system / Geological Society, London, Special Publications, 17:775-788, doi:10.1144/GSL.SP.1984.017.01.62 --- S. Jasko: On the Neogene development of the Eastern Mediterranean basins / Geological Society, London, Special Publications, 17:789-794, doi:10.1144/GSL.SP.1984.017.01.63 --- P. Chorianopoulou, A. Galeos, and Ch. Ioakim: Pliocene lacustrine sediments in the volcanic succession of Almopias, Macedonia, Greece / Geological Society, London, Special Publications, 17:795-806, doi:10.1144/GSL.SP.1984.017.01.64 --- A. Cramp, M. B. Collins, S. J. Wakefield, and F. T. Banner: Sapropelic layers in the NW Aegean Sea / Geological Society, London, Special Publications, 17:807-813, doi:10.1144/GSL.SP.1984.017.01.65 --- E. D. Chiotis: A Middle Miocene thermal event in northern Greece confirmed by coalification measurements / Geological Society, London, Special Publications, 17:815-818, doi:10.1144/GSL.SP.1984.017.01.66 --- Frank H. Fabricius: Neogene to Quaternary geodynamics of the area of the Ionian Sea and surrounding land masses / Geological Society, London, Special Publications, 17:819-824, doi:10.1144/GSL.SP.1984.017.01.67
    Pages: Online-Ressource (XII, 836 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 1897799667
    Language: English
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  • 13
    Unknown
    Oxford, London, Edinburgh, Boston, Palo Alto, Melbourne : Blackwell Scientific Publications
    Keywords: Feinkörniges Sediment ; Tiefseesediment
    Description / Table of Contents: Introduction --- D. A. V. Stow and D. J. W. Piper: Deep-water fine-grained sediments; history, methodology and terminology / Geological Society, London, Special Publications, 15:3-14, doi:10.1144/GSL.SP.1984.015.01.01 --- Processes --- D. S. Gorsline: A review of fine-grained sediment origins, characteristics, transport and deposition / Geological Society, London, Special Publications, 15:17-34, doi:10.1144/GSL.SP.1984.015.01.02 --- I. N. McCave: Erosion, transport and deposition of fine-grained marine sediments / Geological Society, London, Special Publications, 15:35-69, doi:10.1144/GSL.SP.1984.015.01.03 --- S. L. Eittreim: Methods and observations in the study of deep-sea suspended particulate matter / Geological Society, London, Special Publications, 15:71-82, doi:10.1144/GSL.SP.1984.015.01.04 --- Kate Kranck: Grain-size characteristics of turbidites / Geological Society, London, Special Publications, 15:83-92, doi:10.1144/GSL.SP.1984.015.01.05 --- Terrigenous Turbidites and Associated Facies --- T. C. E. van Weering and J. van Iperen: Fine-grained sediments of the Zaire deep-sea fan, southern Atlantic Ocean / Geological Society, London, Special Publications, 15:95-113, doi:10.1144/GSL.SP.1984.015.01.06 --- A. Monaco and Y. Mear: Sedimentary sequences on the north-west Mediterranean margin during the Late Quaternary: a dynamic interpretation / Geological Society, London, Special Publications, 15:115-125, doi:10.1144/GSL.SP.1984.015.01.07 --- D. A. V. Stow, M. Alam, and D. J. W. Piper: Sedimentology of the Halifax Formation, Nova Scotia: Lower Palaeozoic fine-grained turbidites / Geological Society, London, Special Publications, 15:127-144, doi:10.1144/GSL.SP.1984.015.01.08 --- R. B. Kidd and R. C. Searle: Sedimentation in the southern Cape Verde Basin: regional observations by long-range sidescan sonar / Geological Society, London, Special Publications, 15:145-152, doi:10.1144/GSL.SP.1984.015.01.09 --- G. A. Auffret, R. Le Suave, R. Kerbrat, B. Sichler, S. Roy, C. Laj, and C. Muller: Sedimentation in the southern Cape Verde Basin: seismic and sediment facies / Geological Society, London, Special Publications, 15:153-167, doi:10.1144/GSL.SP.1984.015.01.10 --- H. Got: Sedimentary processes on the west Hellenic Arc margin / Geological Society, London, Special Publications, 15:169-183, doi:10.1144/GSL.SP.1984.015.01.11 --- S. K. Chough: Fine-grained turbidites and associated mass-flow deposits in the Ulleung (Tsushima) Back-arc Basin, East Sea (Sea of Japan) / Geological Society, London, Special Publications, 15:185-196, doi:10.1144/GSL.SP.1984.015.01.12 --- Carbonate Turbidites and Associated Facies --- K. C. Heath and H. T. Mullins: Open-ocean, off-bank transport of fine-grained carbonate sediment in the Northern Bahamas / Geological Society, London, Special Publications, 15:199-208, doi:10.1144/GSL.SP.1984.015.01.13 --- J.-C. Faugères, M. Cremer, E. Gonthier, M. Noel, and J. Poutiers: Late Quaternary calcareous clayey-silty muds in the Obock Trough (Gulf of Aden): hemipelagites or fine-grained turbidites? / Geological Society, London, Special Publications, 15:209-222, doi:10.1144/GSL.SP.1984.015.01.14 --- D. A. V. Stow, S. C. R. Rainey, G. Angell, F. C. Wezel, and D. Savelli: Depositional model for calcilutites: Scaglia Rossa limestones, Umbro-Marchean Apennines / Geological Society, London, Special Publications, 15:223-241, doi:10.1144/GSL.SP.1984.015.01.15 --- Contourites --- D. A. V. Stow and J. A. Holbrook: North Atlantic contourites: an overview / Geological Society, London, Special Publications, 15:245-256, doi:10.1144/GSL.SP.1984.015.01.16 --- A. N. Shor, D. V. Kent, and R. D. Flood: Contourite or turbidite?: magnetic fabric of fine-grained Quaternary sediments, Nova Scotia continental rise / Geological Society, London, Special Publications, 15:257-273, doi:10.1144/GSL.SP.1984.015.01.17 --- E. G. Gonthier, J.-C. Faugères, and D. A. V. Stow: Contourite facies of the Faro Drift, Gulf of Cadiz / Geological Society, London, Special Publications, 15:275-292, doi:10.1144/GSL.SP.1984.015.01.18 --- J. D. Halfman and T. C. Johnson: The sediment texture of contourites in Lake Superior / Geological Society, London, Special Publications, 15:293-307, doi:10.1144/GSL.SP.1984.015.01.19 --- Hemipelagites and Associated Facies of Slopes and Slope Basins --- P. R. Hill: Facies and sequence analysis of Nova Scotian Slope muds: turbidite vs ‘hemipelagic’ deposition / Geological Society, London, Special Publications, 15:311-318, doi:10.1144/GSL.SP.1984.015.01.20 --- B. A. McGregor, T. A. Nelsen, W. L. Stubblefield, and G. F. Merrill: The role of canyons in late Quaternary deposition on the United States mid-Atlantic continental rise / Geological Society, London, Special Publications, 15:319-330, doi:10.1144/GSL.SP.1984.015.01.21 --- P. F. Ballance, M. R. Gregory, G. W. Gibson, G. C. H. Chaproniere, A. P. Kadar, and T. Sameshima: A late Miocene and early Pliocene upper slope-to-shelf sequence of calcareous fine sediment from the Pacific margin of New Zealand / Geological Society, London, Special Publications, 15:331-342, doi:10.1144/GSL.SP.1984.015.01.22 --- K. T. Pickering: Facies, facies-associations and sediment transport/deposition processes in a late Precambrian upper basin-slope/pro-delta,, Finnmark, N. Norway / Geological Society, London, Special Publications, 15:343-362, doi:10.1144/GSL.SP.1984.015.01.23 --- L. A. Krissek: Continental source area contributions to fine-grained sediments on the Oregon and Washington continental slope / Geological Society, London, Special Publications, 15:363-375, doi:10.1144/GSL.SP.1984.015.01.24 --- S. E. Thornton: Basin model for hemipelagic sedimentation in a tectonically active continental margin: Santa Barbara Basin, California Continental Borderland / Geological Society, London, Special Publications, 15:377-394, doi:10.1144/GSL.SP.1984.015.01.25 --- D. S. Gorsline, R. L. Kolpack, H. A. Karl, D. E. Drake, S. E. Thornton, J. R. Schwalbach, C. E. Savrda, and P. Fleischer: Studies of fine-grained sediment transport processes and products in the California Continental Borderland / Geological Society, London, Special Publications, 15:395-415, doi:10.1144/GSL.SP.1984.015.01.26 --- R. Bourrouilh and D. S. Gorsline: Fine-grained sediments associated with fan lobes: Santa Paula Creek, California / Geological Society, London, Special Publications, 15:417-433, doi:10.1144/GSL.SP.1984.015.01.27 --- Pelagites and Organic-Rich Sediments --- A. H. F. Robertson: Origin of varve-type lamination, graded claystones and limestone-shale ‘couplets’ in the lower Cretaceous of the western North Atlantic / Geological Society, London, Special Publications, 15:437-452, doi:10.1144/GSL.SP.1984.015.01.28 --- A. B. Hayward: Hemipelagic chalks in a clastic submarine fan sequence: Miocene SW Turkey / Geological Society, London, Special Publications, 15:453-467, doi:10.1144/GSL.SP.1984.015.01.29 --- P. D. Crevello, J. W. Patton, T. W. Oesleby, W. Schlager, and A. Droxler: Source rock potential of Bahamian Trough carbonates / Geological Society, London, Special Publications, 15:469-480, doi:10.1144/GSL.SP.1984.015.01.30 --- C. M. Isaacs: Hemipelagic deposits in a Miocene basin, California: toward a model of lithologic variation and sequence / Geological Society, London, Special Publications, 15:481-496, doi:10.1144/GSL.SP.1984.015.01.31 --- George C. Anastasakis and Daniel Jean Stanley: Sapropels and organic-rich variants in the Mediterranean: sequence development and classification / Geological Society, London, Special Publications, 15:497-510, doi:10.1144/GSL.SP.1984.015.01.32 --- A. Thickpenny: The sedimentology of the Swedish Alum Shales / Geological Society, London, Special Publications, 15:511-525, doi:10.1144/GSL.SP.1984.015.01.33 --- M. A. Arthur, W. E. Dean, and D. A. V. Stow: Models for the deposition of Mesozoic-Cenozoic fine-grained organic-carbon-rich sediment in the deep sea / Geological Society, London, Special Publications, 15:527-560, doi:10.1144/GSL.SP.1984.015.01.34 --- Internal Characteristics --- R. W. Faas: Plasticity and compaction characteristics of the Quaternary sediments penetrated on the Guatemalan Transect—DSDP Leg 67 / Geological Society, London, Special Publications, 15:563-577, doi:10.1144/GSL.SP.1984.015.01.35 --- C. F. Moon and C. W. Hurst: Fabric of muds and shales: an overview / Geological Society, London, Special Publications, 15:579-593, doi:10.1144/GSL.SP.1984.015.01.36 --- A. Wetzel: Bioturbation in deep-sea fine-grained sediments: influence of sediment texture, turbidite frequency and rates of environmental change / Geological Society, London, Special Publications, 15:595-608, doi:10.1144/GSL.SP.1984.015.01.37 --- Facies Models: Synthesis --- D. A. V. Stow and D. J. W. Piper: Deep-water fine-grained sediments: facies models / Geological Society, London, Special Publications, 15:611-646, doi:10.1144/GSL.SP.1984.015.01.38
    Pages: Online-Ressource (VI, 659 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 0632010754
    Language: English
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  • 14
    Unknown
    London : The Geological Society
    Keywords: Orogenese ; orogeny
    Description / Table of Contents: Jean-Pierre Burg and Mary Ford: Orogeny through time: an overview / Geological Society, London, Special Publications, 121:1-17, doi:10.1144/GSL.SP.1997.121.01.01 --- Giorgio Ranalli: Rheology of the lithosphere in space and time / Geological Society, London, Special Publications, 121:19-37, doi:10.1144/GSL.SP.1997.121.01.02 --- P. G. Thomas, P. Allemand, and N. Mangold: Rheology of planetary lithospheres: a review from impact cratering mechanics / Geological Society, London, Special Publications, 121:39-62, doi:10.1144/GSL.SP.1997.121.01.03 --- P. Choukroune, J. N. Ludden, D. Chardon, A. J. Calvert, and H. Bouhallier: Archaean crustal growth and tectonic processes: a comparison of the Superior Province, Canada and the Dharwar Craton, India / Geological Society, London, Special Publications, 121:63-98, doi:10.1144/GSL.SP.1997.121.01.04 --- M. G. O’Dea, G. S. Lister, T. Maccready, P. G. Betts, N. H. S. Oliver, K. S. Pound, W. Huang, R. K. Valenta, N. H. S. Oliver, and R. K. Valenta: Geodynamic evolution of the Proterozoic Mount Isa terrain / Geological Society, London, Special Publications, 121:99-122, doi:10.1144/GSL.SP.1997.121.01.05 --- A. G. Milnes, O. P. Wennberg, Ø. Skår, and A. G. Koestler: Contraction, extension and timing in the South Norwegian Caledonides: the Sognefjord transect / Geological Society, London, Special Publications, 121:123-148, doi:10.1144/GSL.SP.1997.121.01.06 --- David R. Gray: Tectonics of the southeastern Australian Lachlan Fold Belt: structural and thermal aspects / Geological Society, London, Special Publications, 121:149-177, doi:10.1144/GSL.SP.1997.121.01.07 --- P. Rey, J.-P. Burg, and M. Casey: The Scandinavian Caledonides and their relationship to the Variscan belt / Geological Society, London, Special Publications, 121:179-200, doi:10.1144/GSL.SP.1997.121.01.08 --- V. N. Puchkov: Structure and geodynamics of the Uralian orogen / Geological Society, London, Special Publications, 121:201-236, doi:10.1144/GSL.SP.1997.121.01.09 --- Simon Lamb, Leonore Hoke, Lorcan Kennan, and John Dewey: Cenozoic evolution of the Central Andes in Bolivia and northern Chile / Geological Society, London, Special Publications, 121:237-264, doi:10.1144/GSL.SP.1997.121.01.10
    Pages: Online-Ressource (270 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 1897799756
    Language: English
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  • 15
    Unknown
    London : The Geological Society
    Keywords: Petrophysik ; Geophysics ; Petroleum - Geology ; Petroleum engineering ; Rocks
    Description / Table of Contents: P. D. Jackson, D. G. Gunn, R. C. Flint, D. Beamish, P. I. Meldrum, M. A. Lovell, P. K. Harvey, and A. Peyton: A non-contacting resistivity imaging method for characterizing whole round core while in its liner / Geological Society, London, Special Publications, 122:1-10, doi:10.1144/GSL.SP.1997.122.01.01 --- D. J. Prosser, A. Hurst, and M. R. Wilson: One-man-operable probe permeameters / Geological Society, London, Special Publications, 122:11-18, doi:10.1144/GSL.SP.1997.122.01.02 --- S. R. McDougall, A. B. Dixit, and K. S. Sorbie: Network analogues of wettability at the pore scale / Geological Society, London, Special Publications, 122:19-35, doi:10.1144/GSL.SP.1997.122.01.03 --- S. Pugliese and N. Petford: Pore-structure visualization in microdioritic enclaves / Geological Society, London, Special Publications, 122:37-46, doi:10.1144/GSL.SP.1997.122.01.04 --- Paul B. Basan, Ben D. Lowden, Peter R. Whattler, and John J. Attard: Pore-size data in petrophysics: a perspective on the measurement of pore geometry / Geological Society, London, Special Publications, 122:47-67, doi:10.1144/GSL.SP.1997.122.01.05 --- M. S. King, A. Shakeel, and N. A. Chaudhry: Acoustic wave propagation and permeability in sandstones with systems of aligned cracks / Geological Society, London, Special Publications, 122:69-85, doi:10.1144/GSL.SP.1997.122.01.06 --- Shiyu Xu, Just Doorenbos, Sue Raikes, and Roy White: A simple but powerful model for simulating elastic wave velocities in clastic Silicate rocks / Geological Society, London, Special Publications, 122:87-105, doi:10.1144/GSL.SP.1997.122.01.07 --- T. Apuani, M. S. King, C. Butenuth, and M. H. De Freitas: Measurements of the relationship between Sonic wave velocities and tensile strength in Anisotropic rock / Geological Society, London, Special Publications, 122:107-119, doi:10.1144/GSL.SP.1997.122.01.08 --- C. McCann, J. Sothcott, and S. B. Assefa: Prediction of petrophysical properties from seismic quality factor measurements / Geological Society, London, Special Publications, 122:121-130, doi:10.1144/GSL.SP.1997.122.01.09 --- Y. F. Sun and D. Goldberg: Estimation of aspect-ratio changes with pressure from seismic velocities / Geological Society, London, Special Publications, 122:131-139, doi:10.1144/GSL.SP.1997.122.01.10 --- P. K. Harvey, M. A. Lovell, J. C. Lofts, P. A. Pezard, and J. F. Bristow: Petrophysical estimation from downhole Mineralogy logs / Geological Society, London, Special Publications, 122:141-157, doi:10.1144/GSL.SP.1997.122.01.11 --- Paul F. Worthington: Petrophysical estimation of permeability as a function of scale / Geological Society, London, Special Publications, 122:159-168, doi:10.1144/GSL.SP.1997.122.01.12 --- C. A. Gonçalves, P. K. Harvey, and M. A. Lovell: Prediction of petrophysical parameter logs using a multilayer backpropagation neural network / Geological Society, London, Special Publications, 122:169-180, doi:10.1144/GSL.SP.1997.122.01.13 --- Brian P. Moss: The partitioning of petrophysical data: a review / Geological Society, London, Special Publications, 122:181-252, doi:10.1144/GSL.SP.1997.122.01.14 --- A. Revil, P. A. Pezard, and M. Darot: Electrical conductivity, spontaneous potential and ionic diffusion in porous media / Geological Society, London, Special Publications, 122:253-275, doi:10.1144/GSL.SP.1997.122.01.15 --- Brígida Ramati P. Da Rocha and Tarek M. Habashy: Fractal Geometry, porosity and complex resistivity: from rough pore interfaces to hand specimens / Geological Society, London, Special Publications, 122:277-286, doi:10.1144/GSL.SP.1997.122.01.16 --- Brígida Ramati P. Da Rocha and Tarek M. Habashy: Fractal Geometry, porosity and complex resistivity: from hand specimen to field data / Geological Society, London, Special Publications, 122:287-297, doi:10.1144/GSL.SP.1997.122.01.17 --- M. Ben Clennell: Tortuosity: a guide through the maze / Geological Society, London, Special Publications, 122:299-344, doi:10.1144/GSL.SP.1997.122.01.18 --- J. C. Lofts, J. Bedford, H. Boulton, J. A. van Doorn, and P. Jeffreys: Feature recognition and the interpretation of images acquired from horizontal wellbores / Geological Society, London, Special Publications, 122:345-365, doi:10.1144/GSL.SP.1997.122.01.19 --- D. Goldberg and Y. F. Sun: Scattering attenuation as a function of depth in the Upper Oceanic Crust / Geological Society, London, Special Publications, 122:367-375, doi:10.1144/GSL.SP.1997.122.01.20 --- N. Passas, C. Butenuth, and M. H. De Freitas: An application of the Moiré Method to a study of local strains during rock failure in tension / Geological Society, London, Special Publications, 122:377-388, doi:10.1144/GSL.SP.1997.122.01.21
    Pages: Online-Ressource (VII, 393 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 1897799810
    Language: English
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  • 16
    Keywords: Paläogeographie ; Fossile Erdoberfläche ; Geology, Stratigraphic ; Geomorphology ; Intemperismo ; Paleoambientes ; Paleogeography ; Paleopedology
    Description / Table of Contents: M. Widdowson: The geomorphological and geological importance of palaeosurfaces / Geological Society, London, Special Publications, 120:1-12, doi:10.1144/GSL.SP.1997.120.01.01 --- C. R. Twidale: The great age of some Australian landforms: examples of, and possible explanations for, landscape longevity / Geological Society, London, Special Publications, 120:13-23, doi:10.1144/GSL.SP.1997.120.01.02 --- Europe --- Philip S. Ringrose and Piotr Migoń: Analysis of digital elevation data for the Scottish Highlands and recognition of pre-Quaternary elevated surfaces / Geological Society, London, Special Publications, 120:25-35, doi:10.1144/GSL.SP.1997.120.01.03 --- Peter Coxon and Catherine Coxon: A pre-Pliocene or Pliocene land surface in County Galway, Ireland / Geological Society, London, Special Publications, 120:37-55, doi:10.1144/GSL.SP.1997.120.01.04 --- John J. McAlister and Bernard J. Smith: Geochemical trends in Early Tertiary palaeosols from northeast Ireland: a statistical approach to assess element behaviour during weathering / Geological Society, London, Special Publications, 120:57-65, doi:10.1144/GSL.SP.1997.120.01.05 --- David W. Jolley: Palaeosurface palynofloras of the Skye lava field and the age of the British Tertiary volcanic province / Geological Society, London, Special Publications, 120:67-94, doi:10.1144/GSL.SP.1997.120.01.06 --- Karna Lidmar-Bergström, Siv Olsson, and Mats Olvmo: Palaeosurfaces and associated saprolites in southern Sweden / Geological Society, London, Special Publications, 120:95-124, doi:10.1144/GSL.SP.1997.120.01.07 --- Yvonne Battiau-Queney: Preservation of old palaeosurfaces in glaciated areas: examples from the French western Alps / Geological Society, London, Special Publications, 120:125-132, doi:10.1144/GSL.SP.1997.120.01.08 --- W. Brian Whalley, Brice R. Rea, Michelle M. Rainey, and John J. McAlister: Rock weathering in blockfields: some preliminary data from mountain plateaus in North Norway / Geological Society, London, Special Publications, 120:133-145, doi:10.1144/GSL.SP.1997.120.01.09 --- M. Gutiérrez-Elorza and F. J. Gracia: Environmental interpretation and evolution of the Tertiary erosion surfaces in the Iberian Range (Spain) / Geological Society, London, Special Publications, 120:147-158, doi:10.1144/GSL.SP.1997.120.01.10 --- Harald Borger: Environmental changes during the Tertiary: the example of palaeoweathering residues in central Spain / Geological Society, London, Special Publications, 120:159-173, doi:10.1144/GSL.SP.1997.120.01.11 --- E. Molina Ballesteros, J. García Talegón, and M. A. Vicente Hernández: Palaeoweathering profiles developed on the Iberian Hercynian Basement and their relationship to the oldest Tertiary surface in central and western Spain / Geological Society, London, Special Publications, 120:175-185, doi:10.1144/GSL.SP.1997.120.01.12 --- Piotr Migoń: Tertiary etchsurfaces in the Sudetes Mountains, SW Poland: a contribution to the pre-Quaternary morphology of Central Europe / Geological Society, London, Special Publications, 120:187-202, doi:10.1144/GSL.SP.1997.120.01.13 --- Ján Lacika: Neogene palaeosurfaces in the volcanic area of Central Slovakia / Geological Society, London, Special Publications, 120:203-219, doi:10.1144/GSL.SP.1997.120.01.14 --- India --- M. Widdowson: Tertiary palaeosurfaces of the SW Deccan, Western India: implications for passive margin uplift / Geological Society, London, Special Publications, 120:221-248, doi:10.1144/GSL.SP.1997.120.01.15 --- Yanni Gunnell: Topography, palaeosurfaces and denudation over the Karnataka Uplands, southern India / Geological Society, London, Special Publications, 120:249-267, doi:10.1144/GSL.SP.1997.120.01.16 --- M. Widdowson, J. N. Walsh, and K. V. Subbarao: The geochemistry of Indian bole horizons: palaeoenvironmental implications of Deccan intravolcanic palaeosurfaces / Geological Society, London, Special Publications, 120:269-281, doi:10.1144/GSL.SP.1997.120.01.17 --- Africa --- Kevin White, Nick Drake, and John Walden: Remote sensing for mapping palaeosurfaces on the basis of surficial chemistry: a mixed pixel approach / Geological Society, London, Special Publications, 120:283-293, doi:10.1144/GSL.SP.1997.120.01.18 --- D. J. Bowden: The geochemistry and development of lateritized footslope benches: The Kasewe Hills, Sierra Leone / Geological Society, London, Special Publications, 120:295-305, doi:10.1144/GSL.SP.1997.120.01.19 --- South America --- L. Kennan, S. H. Lamb, and L. Hoke: High-altitude palaeosurfaces in the Bolivian Andes: evidence for late Cenozoic surface uplift / Geological Society, London, Special Publications, 120:307-323, doi:10.1144/GSL.SP.1997.120.01.20 --- Errata --- Erratum / Geological Society, London, Special Publications, 120:ERR, doi:10.1144/GSL.SP.1997.120.01.22 --- Erratum / Geological Society, London, Special Publications, 120:ERR, doi:10.1144/GSL.SP.1997.120.01.23
    Pages: Online-Ressource (VI, 330 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 1897799578
    Language: English
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  • 17
    Unknown
    Oxford, London, Edinburgh, Boston, Melbourne : Blackwell Scientific Publications
    Keywords: Verwitterung
    Description / Table of Contents: Weathering Processes --- M. J. Wilson and D. Jones: Lichen weathering of minerals: implications for pedogenesis / Geological Society, London, Special Publications, 11:5-12, doi:10.1144/GSL.SP.1983.011.01.01 --- D. A. Spears: Porewater reactions in the unsaturated zone with special reference to groundwater quality in England / Geological Society, London, Special Publications, 11:13-18, doi:10.1144/GSL.SP.1983.011.01.02 --- David C. Cawsey and Paul Mellon: A review of experimental weathering of basic igneous rocks / Geological Society, London, Special Publications, 11:19-24, doi:10.1144/GSL.SP.1983.011.01.03 --- Kaolinites, Laterites and Bauxites --- H. Wopfner: Kaolinisation and the formation of silicified wood on late Jurassic Gondwana surfaces / Geological Society, London, Special Publications, 11:27-31, doi:10.1144/GSL.SP.1983.011.01.04 --- J. Esteoule-Choux: Kaolinitic weathering profiles in Brittany: genesis and economic importance / Geological Society, London, Special Publications, 11:33-38, doi:10.1144/GSL.SP.1983.011.01.05 --- A. Vincent: The origin and occurrence of Devon Ball Clays / Geological Society, London, Special Publications, 11:39-45, doi:10.1144/GSL.SP.1983.011.01.06 --- S. K. Monro, F. C. Loughnan, and M. C. Walker: The Ayrshire Bauxitic Clay: an allochthonous deposit? / Geological Society, London, Special Publications, 11:47-58, doi:10.1144/GSL.SP.1983.011.01.07 --- T. R. Marshall, B. J. Amos, and D. Stephenson: Base metal concentrations in kaolinised and silicified lavas of the Central Burma volcanics / Geological Society, London, Special Publications, 11:59-68, doi:10.1144/GSL.SP.1983.011.01.08 --- M. J. McFarlane: A low level laterite profile from Uganda and its relevance to the question of parent material influence on the chemical composition of laterites / Geological Society, London, Special Publications, 11:69-76, doi:10.1144/GSL.SP.1983.011.01.09 --- Ida Valeton: Palaeoenvironment of lateritic bauxites with vertical and lateral differentiation / Geological Society, London, Special Publications, 11:77-90, doi:10.1144/GSL.SP.1983.011.01.10 --- J. Esson: Geochemistry of a nickeliferous laterite profile, Liberdade, Brazil / Geological Society, London, Special Publications, 11:91-99, doi:10.1144/GSL.SP.1983.011.01.11 --- Red Beds --- R. Gardner: Reddening of tropical coastal dune sands / Geological Society, London, Special Publications, 11:103-115, doi:10.1144/GSL.SP.1983.011.01.12 --- K. Pye: Post-depositional reddening of late Quaternary coastal dune sands, north-eastern Australia / Geological Society, London, Special Publications, 11:117-129, doi:10.1144/GSL.SP.1983.011.01.13 --- B. M. Besly and P. Turner: Origin of red beds in a moist tropical climate (Etruria Formation, Upper Carboniferous, UK) / Geological Society, London, Special Publications, 11:131-147, doi:10.1144/GSL.SP.1983.011.01.14 --- Duricrusts: Calcretes, Silcretes and Gypcretes --- H. Wopfner: Environment of silcrete formation: a comparison of examples from Australia and the Cologne Embayment, West Germany / Geological Society, London, Special Publications, 11:151-158, doi:10.1144/GSL.SP.1983.011.01.15 --- W. J. E. van de Graaff: Silcrete in Western Australia: geomorphological settings, textures, structures, and their genetic implications / Geological Society, London, Special Publications, 11:159-166, doi:10.1144/GSL.SP.1983.011.01.16 --- M. A. Summerfield: Geochemistry of weathering profile silcretes, southern Cape Province, South Africa / Geological Society, London, Special Publications, 11:167-178, doi:10.1144/GSL.SP.1983.011.01.17 --- C. C. Reeves, Jr: Pliocene channel calcrete and suspenparallel drainage in West Texas and New Mexico / Geological Society, London, Special Publications, 11:179-183, doi:10.1144/GSL.SP.1983.011.01.18 --- Donald Carlisle: Concentration of uranium and vanadium in calcretes and gypcretes / Geological Society, London, Special Publications, 11:185-195, doi:10.1144/GSL.SP.1983.011.01.19 --- John Parnell: Ancient duricrusts and related rocks in perspective: a contribution from the Old Red Sandstone / Geological Society, London, Special Publications, 11:197-209, doi:10.1144/GSL.SP.1983.011.01.20 --- Colin F. Klappa: A process-response model for the formation of pedogenic calcretes / Geological Society, London, Special Publications, 11:211-220, doi:10.1144/GSL.SP.1983.011.01.21 --- A. S. Talma and F. Netterberg: Stable isotope abundances in calcretes / Geological Society, London, Special Publications, 11:221-233, doi:10.1144/GSL.SP.1983.011.01.22 --- F. Netterberg and J. H. Caiger: A Geotechnical classification of calcretes and other pedocretes / Geological Society, London, Special Publications, 11:235-243, doi:10.1144/GSL.SP.1983.011.01.23 --- R. P. Shaw: Karstic residual fluorite-baryte deposits at two localities in Derbyshire / Geological Society, London, Special Publications, 11:245-249, doi:10.1144/GSL.SP.1983.011.01.24 --- John A. Catt: Cenozoic pedogenesis and landform development in south-east England / Geological Society, London, Special Publications, 11:251-258, doi:10.1144/GSL.SP.1983.011.01.25
    Pages: Online-Ressource (258 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 063201072X
    Language: English
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  • 18
    Unknown
    Oxford, London, Edinburgh, Boston, Melbourne : Blackwell Scientific Publications
    Description / Table of Contents: I. Nature and Formation of Oceanic Lithosphere --- Magma Chambers: Products and Processes --- J. A. Orcutt, M. Burnett, and J. S. McClain: Evolution of the ocean crust: results from recent seismic experiments / Geological Society, London, Special Publications, 13:7-16, doi:10.1144/GSL.SP.1984.013.01.01 --- M. R. Fisk: Depths and temperatures of mid-ocean-ridge magma chambers and the composition of their source magmas / Geological Society, London, Special Publications, 13:17-23, doi:10.1144/GSL.SP.1984.013.01.02 --- M. F. J. Flower: Spreading-rate parameters in ocean crust: analogue for ophiolite? / Geological Society, London, Special Publications, 13:25-40, doi:10.1144/GSL.SP.1984.013.01.03 --- J. D. Smewing, N. I. Christensen, I. D. Bartholomew, and P. Browning: The structure of the oceanic upper mantle and lower crust as deduced from the northern section of the Oman ophiolite / Geological Society, London, Special Publications, 13:41-53, doi:10.1144/GSL.SP.1984.013.01.04 --- R. T. Gregory: Melt percolation beneath a spreading ridge: evidence from the Semail peridotite, Oman / Geological Society, London, Special Publications, 13:55-62, doi:10.1144/GSL.SP.1984.013.01.05 --- J. S. Pallister: Parent magmas of the Semail ophiolite, Oman / Geological Society, London, Special Publications, 13:63-70, doi:10.1144/GSL.SP.1984.013.01.06 --- P. Browning: Cryptic variation within the Cumulate Sequence of the Oman ophiolite: magma chamber depth and petrological implications / Geological Society, London, Special Publications, 13:71-82, doi:10.1144/GSL.SP.1984.013.01.07 --- D. Elthon, J. F. Casey, and S. Komor: Cryptic mineral-chemistry variations in a detailed traverse through the cumulate ultramafic rocks of the North Arm Mountain massif of the Bay of Islands ophiolite, Newfoundland / Geological Society, London, Special Publications, 13:83-97, doi:10.1144/GSL.SP.1984.013.01.08 --- Fracture Zones --- R. S. White: Atlantic oceanic crust: seismic structure of a slow-spreading ridge / Geological Society, London, Special Publications, 13:101-111, doi:10.1144/GSL.SP.1984.013.01.09 --- J. M. Auzende, G. Ceuleneer, G. Cornen, T. Juteau, Y. Lagabrielle, G. Lensch, C. Mevel, A. Nicolas, H. Prichard, A. Ribeiro, E. Ruellan, and J. R. Vanney: Intraoceanic tectonism on the Gorringe Bank: observations by submersible / Geological Society, London, Special Publications, 13:113-120, doi:10.1144/GSL.SP.1984.013.01.10 --- J. Honnorez, C. Mevel, and R. Montigny: Occurrence and significance of gneissic amphibolites in the Vema fracture zone, equatorial Mid-Atlantic Ridge / Geological Society, London, Special Publications, 13:121-130, doi:10.1144/GSL.SP.1984.013.01.11 --- J. A. Karson: Variations in structure and petrology in the Coastal Complex, Newfoundland: anatomy of an oceanic fracture zone / Geological Society, London, Special Publications, 13:131-144, doi:10.1144/GSL.SP.1984.013.01.12 --- Mantle Structures --- A. Nicolas and M. Rabinowicz: Mantle flow pattern at oceanic spreading centres: relation with ophiolitic and oceanic structures / Geological Society, London, Special Publications, 13:147-151, doi:10.1144/GSL.SP.1984.013.01.13 --- Lavas and Sediments --- J. Malpas and G. Langdon: Petrology of the Upper Pillow Lava suite, Troodos ophiolite, Cyprus / Geological Society, London, Special Publications, 13:155-167, doi:10.1144/GSL.SP.1984.013.01.14 --- J. F. Boyle and A. H. F. Robertson: Evolving metallogenesis at the Troodos spreading axis / Geological Society, London, Special Publications, 13:169-181, doi:10.1144/GSL.SP.1984.013.01.1--- Isotope Studies & Metamorphism --- D. Elthon, J. R. Lawrence, R. E. Hanson, and C. Stern: Modelling of oxygen-isotope data from the Sarmiento ophiolite complex, Chile / Geological Society, London, Special Publications, 13:185-197, doi:10.1144/GSL.SP.1984.013.01.16 --- D. S. Stakes, H. P. Taylor , jr, and R. L. Fisher: Oxygen-isotope and geochemical characterization of hydrothermal alteration in ophiolite complexes and modern oceanic crust / Geological Society, London, Special Publications, 13:199-214, doi:10.1144/GSL.SP.1984.013.01.17 --- M. J. Thirlwall and B. J. Bluck: Sr-Nd isotope and chemical evidence that the Ballantrae ‘ophiolite’, SW Scotland, is polygenetic / Geological Society, London, Special Publications, 13:215-230, doi:10.1144/GSL.SP.1984.013.01.18 --- M. A. Menzies: Chemical and isotopic heterogeneities in orogenic and ophiolitic peridotites / Geological Society, London, Special Publications, 13:231-240, doi:10.1144/GSL.SP.1984.013.01.19 --- Zulfiqar Ahmed and A. Hall: Petrology and mineralization of the Sakhakot-Qila ophiolite, Pakistan / Geological Society, London, Special Publications, 13:241-252, doi:10.1144/GSL.SP.1984.013.01.20 --- II. Emplacement (Obduction) of Ophiolites --- Ophiolite Emplacement and Obduction --- J. G. Spray: Possible causes and consequences of upper mantle decoupling and ophiolite displacement / Geological Society, London, Special Publications, 13:255-268, doi:10.1144/GSL.SP.1984.013.01.21 --- J. F. Casey and J. F Dewey: Initiation of subduction zones along transform and accreting plate boundaries, triple-junction evolution, and forearc spreading centres—implications for ophiolitic geology and obduction / Geological Society, London, Special Publications, 13:269-290, doi:10.1144/GSL.SP.1984.013.01.22 --- Y. Ogawa and J. Naka: Emplacement of ophiolitic rocks in forearc areas: Examples from central Japan and Izu-Mariana-Yap island arc system / Geological Society, London, Special Publications, 13:291-301, doi:10.1144/GSL.SP.1984.013.01.23 --- M. P. Searle and R. K. Stevens: Obduction processes in ancient, modern and future ophiolites / Geological Society, London, Special Publications, 13:303-319, doi:10.1144/GSL.SP.1984.013.01.24 --- N. H. Woodcock and A. H. F. Robertson: The structural variety in Tethyan ophiolite terrains / Geological Society, London, Special Publications, 13:321-330, doi:10.1144/GSL.SP.1984.013.01.25 --- Regional Studies --- H. Colley: An ophiolite suite in Fiji? / Geological Society, London, Special Publications, 13:333-340, doi:10.1144/GSL.SP.1984.013.01.26 --- H. L. Davies and A. L. Jaques: Emplacement of ophiolite in Papua New Guinea / Geological Society, London, Special Publications, 13:341-349, doi:10.1144/GSL.SP.1984.013.01.27 --- J. S. Milsom: The gravity field of the Marum ophiolite complex, Papua New Guinea / Geological Society, London, Special Publications, 13:351-357, doi:10.1144/GSL.SP.1984.013.01.28 --- R. G. Coleman: Ophiolites and the tectonic evolution of the Arabian Peninsula / Geological Society, London, Special Publications, 13:359-366, doi:10.1144/GSL.SP.1984.013.01.29 --- G. Wadge, G. Draper, and J. F. Lewis: Ophiolites of the northern Caribbean: A reappraisal of their roles in the evolution of the Caribbean plate boundary / Geological Society, London, Special Publications, 13:367-380, doi:10.1144/GSL.SP.1984.013.01.30 --- B. A. Sturt, H. Furnes, and D. Roberts: A conspectus of Scandinavian Caledonian ophiolites / Geological Society, London, Special Publications, 13:381-391, doi:10.1144/GSL.SP.1984.013.01.31 --- R. Hall: Ophiolites: Figments of Oceanic Lithosphere? / Geological Society, London, Special Publications, 13:393-403, doi:10.1144/GSL.SP.1984.013.01.32 --- D. A. Rothery: The role of Landsat Multispectral Scanner (MSS) imagery in mapping the Oman ophiolite / Geological Society, London, Special Publications, 13:405-413, doi:10.1144/GSL.SP.1984.013.01.33
    Pages: Online-Ressource (VI, 413 Seiten) , Illustrationen, Diagramme
    ISBN: 0632012196
    Language: English
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  • 19
    Unknown
    Oxford, London, Edinburgh, Boston, Melbourne : Blackwell Scientific Publications
    Keywords: Erdöl ; Europa ; Geochemie
    Description / Table of Contents: J. Brooks: Introduction / Geological Society, London, Special Publications, 12:ix-xv, doi:10.1144/GSL.SP.1983.012.01.01 --- Geological and Geochemical Studies of Northwest European Continental Shelf --- P. J. Walmsley: The role of the Department of Energy in petroleum exploration of the United Kingdom / Geological Society, London, Special Publications, 12:3-10, doi:10.1144/GSL.SP.1983.012.01.02 --- A. Makourine: Gas Exploration and Reserves in Europe / Geological Society, London, Special Publications, 12:11-17, doi:10.1144/GSL.SP.1983.012.01.03 --- P. C. Barnard and B. S. Cooper: A Review of Geochemical Data Related to the Northwest European Gas Province / Geological Society, London, Special Publications, 12:19-33, doi:10.1144/GSL.SP.1983.012.01.04 --- J. L. Gevirtz, B. D. Carey, and S. R. Blanco: Surface Geochemical Exploration in the North Sea / Geological Society, London, Special Publications, 12:35-50, doi:10.1144/GSL.SP.1983.012.01.05 --- E. Faber and W. Stahl: Analytic Procedure and Results of an Isotope Geochemical Surface Survey in an Area of the British North Sea / Geological Society, London, Special Publications, 12:51-63, doi:10.1144/GSL.SP.1983.012.01.06 --- J. Sigalove: Petroleum Offshore Sniffer Exploration / Geological Society, London, Special Publications, 12:65, doi:10.1144/GSL.SP.1983.012.01.07 --- G. J. Candy: Petroleum Exploration Onshore U.K. / Geological Society, London, Special Publications, 12:67-68, doi:10.1144/GSL.SP.1983.012.01.08 --- T. P. Brennand: North Sea petroleum exploration / Geological Society, London, Special Publications, 12:69, doi:10.1144/GSL.SP.1983.012.01.09 --- Hans Rønnevik, Svein Eggen, and Jan Vollset: Exploration of the Norwegian Shelf / Geological Society, London, Special Publications, 12:71-93, doi:10.1144/GSL.SP.1983.012.01.10 --- D. C. Mudge and G. M. Bliss: Stratigraphy and Sedimentation of the Palaeocene Sands in the Northern North Sea / Geological Society, London, Special Publications, 12:95-111, doi:10.1144/GSL.SP.1983.012.01.11 --- C. D. Curtis: Geochemistry of Porosity Enhancement and Reduction in Clastic Sediments / Geological Society, London, Special Publications, 12:113-125, doi:10.1144/GSL.SP.1983.012.01.12 --- Hilary Irwin and Andrew Hurst: Applications of Geochemistry to Sandstone Reservoir Studies / Geological Society, London, Special Publications, 12:127-146, doi:10.1144/GSL.SP.1983.012.01.13 --- M. J. Pearson and D. Watkins: Organofacies and Early Maturation Effects in Upper Jurassic Sediments From the Inner Moray Firth Basin, North Sea / Geological Society, London, Special Publications, 12:147-160, doi:10.1144/GSL.SP.1983.012.01.14 --- M. J. Pearson, D. Watkins, J-L Pittion, D. Caston, and J. S. Small: Aspects of Burial Diagenesis, Organic Maturation and Palaeothermal History of an Area in the South Viking Graben, North Sea / Geological Society, London, Special Publications, 12:161-173, doi:10.1144/GSL.SP.1983.012.01.15 --- C. Cornford, J. A. Morrow, A. Turrington, J. A. Miles, and J. Brooks: Some Geological Controls on Oil Composition in the U.K. North Sea / Geological Society, London, Special Publications, 12:175-194, doi:10.1144/GSL.SP.1983.012.01.16 --- M. J. Fisher and Jennifer A. Miles: Kerogen Types, Organic Maturation and Hydrocarbon Occurrences in the Moray Firth and South Viking Graben, North Sea Basin / Geological Society, London, Special Publications, 12:195-201, doi:10.1144/GSL.SP.1983.012.01.17 --- R. H. Reitsema: Geochemistry of North and South Brae Areas, North Sea / Geological Society, London, Special Publications, 12:203-212, doi:10.1144/GSL.SP.1983.012.01.18 --- A. E. Griffith: The Search for Petroleum in Northern Ireland / Geological Society, London, Special Publications, 12:213-222, doi:10.1144/GSL.SP.1983.012.01.19 --- D. G. Roberts: Frontier exploration in Western and Northwest Europe / Geological Society, London, Special Publications, 12:223-224, doi:10.1144/GSL.SP.1983.012.01.20 --- Petroleum Exploration of Europe --- L. Mattavelli, T. Ricchiuto, D. Grighani, and M. Schoell: Origins of Natural Gas in the Po Valley, N. Italy / Geological Society, London, Special Publications, 12:227, doi:10.1144/GSL.SP.1983.012.01.21 --- M. Schoell and M. J. Whiticar: Isotope Geochemistry of Natural Gases in Central Europe / Geological Society, London, Special Publications, 12:229, doi:10.1144/GSL.SP.1983.012.01.22 --- K. Kuckelkorn, H. Wehner, and H. Hufnagel: Geochemical Observations and Oil Genesis in the German Alps and their foreland / Geological Society, London, Special Publications, 12:231-233, doi:10.1144/GSL.SP.1983.012.01.23 --- D. P. McKenzie: Basin Evolution and Hydrocarbon Generation / Geological Society, London, Special Publications, 12:253-254, doi:10.1144/GSL.SP.1983.012.01.25 --- B. Durand and M. Paratte: Oil Potential of Coals: A Geochemical Approach / Geological Society, London, Special Publications, 12:255-265, doi:10.1144/GSL.SP.1983.012.01.26 --- P. A. Schenck, J. W. de Leeuw, T. C. Viets, and J. Haverkamp: Pyrolysis-Mass Spectrometry in Coal Chemistry: a study of the coalification of vitrites and the typification of Australian Brown Coals / Geological Society, London, Special Publications, 12:267-274, doi:10.1144/GSL.SP.1983.012.01.27 --- D. J. Batten: Identification of Amorphous Sedimentary Organic Matter by Transmitted Light Microscopy / Geological Society, London, Special Publications, 12:275-287, doi:10.1144/GSL.SP.1983.012.01.28 --- P. M. R. Smith: Spectral Correlation of Spore Coloration Standards / Geological Society, London, Special Publications, 12:289-294, doi:10.1144/GSL.SP.1983.012.01.29 --- J. M. A. Buiskool Toxopeus: Selection Criteria for the Use of Vitrinite Reflectance as a Maturity Tool / Geological Society, London, Special Publications, 12:295-307, doi:10.1144/GSL.SP.1983.012.01.30 --- A. J. G. Barwise: Use of Porphyrins as a Maturity Parameter for Oils and Sediments / Geological Society, London, Special Publications, 12:309-315, doi:10.1144/GSL.SP.1983.012.01.31 --- Petroleum Geochemical Principles and Techniques --- D. H. Welte, M. A. Yükler, M. Radke, D. Leythaeuser, U. Mann, and U. Ritter: Organic Geochemistry and Basin Modelling — Important Tools in Petroleum Exploration / Geological Society, London, Special Publications, 12:237-252, doi:10.1144/GSL.SP.1983.012.01.24 --- Geological Information on Hydrocarbon Exploration on the U.K. Continental Shelf --- G. G. Baxter: Introduction / Geological Society, London, Special Publications, 12:319, doi:10.1144/GSL.SP.1983.012.01.32 --- D. J. McKay: The Compilation of an Earth Science Bibliography for the North Sea and Adjacent Areas / Geological Society, London, Special Publications, 12:321-328, doi:10.1144/GSL.SP.1983.012.01.33 --- P. Wigley: Commercially Available Geological Databanks—U.K.C.S. / Geological Society, London, Special Publications, 12:329-341, doi:10.1144/GSL.SP.1983.012.01.34 --- J. R. V. Brooks: Geological Information from Hydrocarbon Exploration on the United Kingdom Continental Shelf / Geological Society, London, Special Publications, 12:343-356, doi:10.1144/GSL.SP.1983.012.01.35 --- K. J. Chew and H. Stephenson: EXPHST—A Program to Analyse the History of Exploration Success within a Basin or Country / Geological Society, London, Special Publications, 12:357-371, doi:10.1144/GSL.SP.1983.012.01.36 --- G. G. Baxter: The Use of Computerized Information in Britoil, Exploration Division / Geological Society, London, Special Publications, 12:373, doi:10.1144/GSL.SP.1983.012.01.37
    Pages: Online-Ressource (XV, 379 Seiten)
    ISBN: 0632010762
    Language: English
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  • 20
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of metamorphic geology 1 (1983), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: The equilibrium thermodynamics of the reaction:And the equilibrium constant is composed of activities formulated using ideal mixing on sites. Consideration is given to the evaluation of uncertainties in pressures calculated using the geobarometer. Preliminary testing suggests that the geobarometer has considerable potential. Much wider testing is now required.
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  • 21
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of metamorphic geology 1 (1983), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Abstract. Pink piemontite-spessartine-bearing and grey-green spessartine-bearing manganiferous quartzose schists derived from siliceous pelagites, and green quartzofeldspathic schists, are described from the greenschist facies of the Haast Schist terrane, near Arrow Junction, western Otago. Electron microprobe data are reported for sphene, spessartine-rich garnet, manganoan epidote, piemontite, tourmaline, phengitic muscovite, chlorite, albite, haematite, rutile, manganoan calcite and chalcopyrite.Metamorphism occurred at about 6.4kbar, 400°C. Xco2 was above the quartz-rutile-calcite-sphene buffer (Xco2± 0.02) throughout the recorded metamorphic history of the piemontite schists. It dropped from above to below this critical buffering value in a spessartine-rich schist and it was close to or below the buffering value in the quartzofeldspathic schists. Production of piemontite required high fO2, believed to be inherited from MnOx in the parent pelagite. Substantial loss of O2 (e.g. minimum of 0.19% by weight in one rock) during diagenesis and/or metamorphism is inferred. In the grey-green schists this inhibited piemontite formation. Slight loss of O2 and Ca2+ accompanied minor late-stage replacement of piemontite by second generation spessartine. Observed zoning and mineral replacements indicate rise of temperature, drop in pressure, or invasion by solutions of lower fO2 and XCO2 equilibrated with surrounding schists.The detailed chemistry of the minerals studied correlates with available Mn and with bulk-rock (Fe3+ x 100)/(Fe2++ Fe3+). The oxidation ratio ranges from 24 in average green quartzofeldspathic schist, through 78 in average grey-green manganiferous quartzose schist, to almost 100 in some piemontite-bearing schists. As Fe2+ gives way to Fe3+, Mg/Fe ratios tend to rise in chlorite, phengite, tourmaline, spessartine, and calcite, Mn increases and Ti decreases in haematite, Mn increases in spessartine and calcite, and Fe increases in rutile. Available divalent cations are depleted relative to Al; chlorite is more aluminous, and phengite more paragonitic than in typical Haast schists.
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  • 22
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of metamorphic geology 1 (1983), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Field, petrographic and microprobe investigations of metaclastic rocks, calcareous schists, marbles, chloritic calcareous meta-volcanic units and schists/paragneisses which crop out along the eastern portion of the Central East-West Cross Island Highway in Taiwan demonstrate that metamorphic intensity gradually increases eastward. The lower greenschist facies Slate Formation on the W contains completely recrystallized, pure albitic plagioclase, but at least some of the white micas (± chlorites) probably represent relict detrital flakes. Neo-blastic biotite and epidote occur sporadically in the Pihou(?) Formation, and increase dramatically eastward; concomitantly the abundance of carbonaceous matter decreases to zero in the eastern Tailuko zone, and the amount of chlorite + white mica diminishes somewhat. Epidote becomes more aluminous at higher metamorphic grade. Eastward, phengites change progressively to more muscovitic compositions as the proportion of biotite increases.A close approach to chemical equilibrium for the pre-Cenozoic, complexly deformed metamorphic basement assemblages is suggested by regular, systematic, major and minor element partitioning between analysed coexisting phases. Fractionation is less pronounced on the E, reflecting higher temperatures. Estimated physical conditions of recrystallization with αH2O and αCO2 moderate, are: T 〉 325 ± 75°C, P 〉 3 kbar (W); T 〉 425 ± 75°C, P 〉 4kbar(E).The gradual eastward increase in metamorphic intensity from the Slate Formation through the Pihou(?) Formation and the three Tailuko zones, as well as the relict precursor textures in the pre-Cenozoic layered basement rocks indicate that the observed paragenetic sequence could represent a synchronous Neogene recrystallization event, probably accompanying the Plio-Pleistocene collision of the Asiatic continental margin and the Luzon (Coastal Range) andesitic arc.
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  • 23
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of metamorphic geology 1 (1983), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: The structure, microstructure and petrology of a small area close to the village of Bard in Val d'Aosta (Italy) has been studied in detail. The area lies across the contact between the Gneiss Minuti (GM) and the Eclogitic Micaschist (EMS) Complexes of the Lower element of the Sesia portion of the Sesia-Lanzo Zone (Western Alps). Both complexes have undergone high-pressure metamorphism, but the metamorphic assemblages indicate a sudden increase in pressure in going across the contact from the GM to the EMS. Therefore, we interpret the contact as a thrust dividing the lower element of the Sesia into two sub-elements. This interpretation is supported by structural evidence.The early Alpine (90-70 Ma) metamorphic history is best preserved in the EMS and is one of increasing pressure associated with thrusting. The maximum P/T recorded in the EMS is 〉1500 MPa (〉15kbar) and 550°C and in the GM is 〈 1500-1300 MPa (〈 15-13 kbar) and 500-550°C. We suggest that the rocks were probably in an active Benioff zone during this time.From then on the histories of the GM and EMS are the same. Deformation continued and the thrust and thrust slices were folded during decreasing pressure. We interpret the first postthrusting deformation in terms of uplift associated with continued shortening of the crust and underplating after the Benioff zone had become inactive and a new Benioff zone had developed further to the north-west.A still later deformation and the Lepontine metamorphism (38 Ma) are related to continued uplift. Much of this deformation is characterized by structures indicative of vertical shortening and lateral spreading as the mountains rose above the general level of the surface.
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  • 24
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of metamorphic geology 1 (1983), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Type of Medium: Electronic Resource
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  • 25
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of metamorphic geology 1 (1983), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: In the Boi Massif of Western Timor the Mutis Complex, which is equivalent to the Lolotoi Complex of East Timor, is composed of two lithostratigraphical components: various basement schists and gneisses; and the dismembered remnants of an ophiolite. Cordierite-bearing pelitic schists and gneisses carry an early mineral assemblage of biotite + garnet + plagioclase + Al-silicate, but contain no prograde muscovite; sillimanite occurs in a textural mode which suggests that it replaced and pseudomorphed kyanite at an early stage and some specimens of pelitic schist contain tiny kyanite relics in plagioclase. Textural relations between, and mineral chemistries of, ferro-magnesian phases in these pelitic chists and gneisses suggest that two discontinuous reactions and additional continuous compositional changes have been overstepped, possibly with concomitant anatexis, as a result of decrease in Pload during high temperature metamorphism. The simplified reactions are: garnet and/or biotite + sillimanite + quartz + cordierite + hercynite + ilmenite + excess components. P-T conditions during the development of the early mineral assemblage in the pelitic gneisses are estimated to have been P + 10 kbar and T 〉 750°C, based upon the plagioclase-garnet-Al-silicate-quartz geobarometer and the garnet-biotite geothermometer. P-T conditions during the subsequent development of cordierite-bearing mineral assemblages in the pelitic gneisses are estimated to have been P + 5 kbar and T + 700°C with XH2O 〈 0.5, based upon the Fe content of cordierite occurring in the assemblage quartz + plagioclase + sillimanite + biotite + garnet + cordierite coexisting with melt.Final equilibration between some of the phases suggests that conditions dropped to P 〉 2.3 kbar and T 〉 600°C. A similar exhumation P-T path is suggested for the pelitic schists with early metamorphic conditions of P 〉 6.2 kbar and T 〉 745°C and subsequent development of cordierite under conditions in the range P = 3-4 kbar and T = 600-700°C. The tectonic implications of these P-T estimates are discussed and it is concluded that the P-T path followed by these rocks was caused by decompression during rifting and synmetamorphic ophiolite emplacement resulting from processes during the initiation and development of a convergent plate junction located in Southeast Asia during late Jurassic to Cretaceous time.
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  • 26
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    Journal of metamorphic geology 1 (1983), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Plagioclase compositions vary from An0.1–2.5 to An32 with increasing grade in chlorite zone to oligoclase zone quartzofeldspathic schists, Franz Josef-Fox Glacier area, Southern Alps, New Zealand. This change is interrupted by the peristerite composition gap in rocks transitional between greenschist and amphibolite facies grade. Oligoclase (An20-24) and albite (An0.1–0.5) are found in biotite zone schists below the garnet isograd. With increasing grade, the plagioclase compositions outline the peristerite gap, which is asymmetric and narrows to compositions of An12 and An6 near the top of the garnet zone. In any one sample, oligoclase is the stable mineral in mica-rich layers above the garnet isograd, whereas albite and oligoclase exist in apparent textural equilibrium in adjacent quartz-plagioclase layers. The initial appearance of oligoclase in both layers results from the breakdown of epidote and possibly sphene. Carbonate is restricted to the quartz-plagioclase rich layers and probably accounts for the more sodic composition of oligoclase in these layers. The formation of more Ca-rich albite and more Na-rich oligoclase near the upper limit of the garnet zone coincides with the disappearance of carbonate and closure of the peristerite gap. Garnet appears to have only a localized effect on Ca-enrichment of plagioclase in mica-rich layers within the garnet zone. The Na-content of white mica increases sympathetically with increasing Ca-content of oligoclase and metamorphic grade.Comparison of the peristerite gap in the Franz Josef-Fox Glacier schists and schists of the same bulk composition in the Haast River area, 80 km to the S, indicates that oligoclase appears and epidote disappears at lower temperatures, and that the composition gap between coexisting albite and oligoclase is narrower in the Franz Josef-Fox Glacier area. It is suggested that a higher thermal gradient (38-40°C/km) and variations in Si/Al ordering during growth of the plagioclases between the two areas may account for these differences. In the Alpine schists the peristerite gap exists over a temperature and pressure interval of about 370-515°C and 5.5-7 kbar (550-700 MPa) PH2O.
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  • 27
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    Journal of metamorphic geology 15 (1997), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Timing constraints on shear zones can provide an insight into the kinematic and exhumation evolution of metamorphic belts. In the Musgrave Block, central Australia, granulite facies gneisses have been affected, to varying degrees, by mylonitic deformation, some of which attained eclogite facies. The Davenport Shear Zone is a dominant strike-slip system that formed at eclogite facies conditions (T ≈650 °C and P≈12.0 kbar). Sm–Nd mineral isochrons obtained from equilibrated high-pressure assemblages, as well as 40Ar–39Ar data, show that the eclogite and greenschist facies high-strain overprints were coeval, at c. 550 Ma. Mylonitic processes do not appear to have reset the U–Pb system in zircon, but may have partially disturbed it. The thermal gradient in the Musgrave Block crust at c. 550 Ma was c. 16 °C km−1 and at c. 535 Ma was c. 18 °C km−1, based on P–T  estimates of eclogite and greenschist facies shear zones, respectively. These estimates are similar to present-day geothermal gradients in many stable continental shield areas, suggesting that the region did not undergo a significant transient perturbation of the geotherm. Therefore, in the Musgrave Block, cooling subsequent to eclogite facies metamorphism appears to have been controlled by exhumation, rather than by the removal of a heat source. Estimated exhumation rates in the range 0.2 to ≥1.5 mm year−1 are comparable with other orogenic belts, rather than cratonic areas elsewhere.
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  • 28
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    Journal of metamorphic geology 15 (1997), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: The Susunai Complex of southeast Sakhalin represents a subduction-related accretionary complex of pelitic and basic rocks. Two stages of metamorphism are recognized: (1) a local, low-P/T event characterized by Si-poor calcic amphiboles; (2) a regional, high-P/T event characterized by pumpellyite, actinolite, epidote, sodic amphibole, sodic pyroxene, stilpnomelane and aragonite. The major mineral assemblages of the high-P/T Susunai metabasites contain pumpellyite + epidote + actinolite + chlorite, epidote + actinolite + chlorite, epidote + Na-amphibole + Na-pyroxene + chlorite-(-haematite. The Na-amphibole is commonly magnesioriebeckite. The Na-pyroxene is jadeite-poor aegirine to aegirine-augite. Application of empirically and experimentally based thermobarometers suggests peak conditions of T= 250–300C, P= 4.7–6 kbar. Textural relationships in Susunai metabasite samples and a petrogenetic grid calculated for the Fe3+-rich basaltic system suggest that pressure and temperature increased during prograde metamorphism.
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  • 29
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    Journal of metamorphic geology 15 (1997), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: In the Llano Uplift of central Texas (USA), prograde homogenization of garnet growth zoning took place during moderate-to high-pressure dynamothermal metamorphism over a narrow temperature range near the transition from the amphibolite to the granulite facies. This subtle record of early dynamothermal metamorphism survived subsequent static metamorphism at low pressures in the middle-amphibolite facies, despite the destruction of most high-pressure mineral assemblages that originated in the early metamorphic episode. Geographically systematic variations in the degree of homogenization indicate that the uplift as a whole underwent high-pressure metamorphism, in accord with emerging tectonic models for the mid-Proterozoic evolution of the southern margin of the North American continent.
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  • 30
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    Journal of metamorphic geology 15 (1997), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Sm–Nd ages of garnet from the northern Coast Mountains of south-eastern Alaska, USA, constrain the timing of thermal events in polyphase metamorphic rocks of the western metamorphic belt and provide new data on the spatial extent of Cretaceous regional metamorphism. Bulk garnet–whole-rock Sm–Nd ages for a sillimanite-zone amphibolite (Taku Inlet) and a biotite-zone metapelite (Tracy Arm) are 77±17 Ma and 59±12 Ma, respectively. Garnet core–whole-rock (80±9 Ma), core–matrix (84±9 Ma), rim–whole-rock (59±4 Ma) and rim–matrix (62±4 Ma) ages were obtained from a sample collected 200 m west of a Palaeocene Coast plutonic–metamorphic complex sill-like pluton that separates medium-grade metamorphic rocks from high-grade metamorphic rocks and voluminous Tertiary plutons in the core of the orogen. The garnet core ages of c. 80 Ma indicate that the regional metamorphic grade reached garnet zone prior to the intrusion of the plutons and high-grade metamorphism of rocks to the east. Similar ages for the younger plutons, the youngest garnets and the rim of a multistage garnet (c. 59 Ma) indicate a later episode of contact metamorphic garnet growth. Documentation of pre-71 Ma garnet-zone metamorphism along the western edge of the Coast plutonic–metamorphic complex confirms that Albian to Late Cretaceous metamorphism associated with crustal thickening affected this part of the orogen. The similarity of garnet Sm–Nd ages to independent age estimates for metamorphic events confirms that this technique provides useful estimates for the timing of Late Cretaceous to Tertiary thermal events. The c. 20 Myr difference between garnet core and rim ages suggests that the Sm–Nd isotope systematics of a single garnet grain can be used for distinguishing between multiple metamorphic events.
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  • 31
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Representative diamond-bearing gneisses and dolomitic marble, eclogite and Ti-clinohumite-bearing garnet peridotite from Unit I at Kumdy Kol and whiteschist from Unit II at Kulet, eastern Kokchetav Massif, northern Kazakhstan, were studied. Diamond-bearing gneisses contain variable assemblages, including Grt+Bt+Qtz±Pl±Kfs±Zo±Chl±Tur±Cal and minor Ap, Rt and Zrn; abundant inclusions of diamond, graphite+chlorite (or calcite), phengite, clinopyroxene, K-feldspar, biotite, rutile, titanite, calcite and zircon occur in garnet. Diamond-bearing dolomitic marbles consist of Dol+Di±Grt+Phl; inclusions of diamond, dolomite±graphite, biotite, and clinopyroxene were identified in garnet. Whiteschists carry the assemblage Ky+Tlc+Grt+Rt; garnet shows compositional zoning, and contains abundant inclusions of talc, kyanite and rutile with minor phlogopite, chlorite, margarite and zoisite. Inclusions and zoning patterns of garnet delineate the prograde P–T  path. Inclusions of quartz pseudomorphs after coesite were identified in garnet from both eclogite and gneiss. Other ultrahigh-pressure (UHP) indicators include Na-bearing garnet (up to 0.14 wt% Na2O) with omphacitic Cpx in eclogite, occurrence of high-K diopside (up to 1.56 wt% K2O) and phlogopite in diamond-bearing dolomitic marble, and Cr-bearing kyanite in whiteschist. These UHP rocks exhibit at least three stages of metamorphic recrystallization. The Fe-Mg partitioning between clinopyroxene and garnet yields a peak temperature of 800–1000 °C at P 〉40 kbar for diamond-bearing rocks, and about 740–780 °C at 〉28–35 kbar for eclogite, whiteschist and Ti-bearing garnet peridotite. The formation of symplectitic plagioclase+amphibole after clinopyroxene, and replacement of garnet by biotite, amphibole, or plagioclase mark retrograde amphibolite facies recrystallization at 650–680 °C and pressure less than about 10 kbar. The exsolution of calcite from dolomite, and development of matrix chlorite and actinolite imply an even lower grade greenschist facies overprint at c. 420 °C and 2–3 kbar. A clockwise P–T  path suggests that supracrustal sediments together with basaltic and ultramafic lenses apparently were subjected to UHP subduction-zone metamorphism within the diamond stability field. Tectonic mixing may have occurred prior to UHP metamorphism at mantle depths. During subsequent exhumation and juxtaposition of many other tectonic units, intense deformation chaotically mixed and mylonitized these lithotectonic assemblages.
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    Journal of metamorphic geology 15 (1997), S. 0 
    ISSN: 1525-1314
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    Topics: Geosciences
    Notes: White mica from the Liassic black shales and slates in Central Switzerland was analysed by transmission electron microscopy (TEM) and electron microprobe to determine its textural and compositional evolution during very low-grade prograde metamorphism. Samples were studied from the diagenetic zone, anchizone and epizone (T ≈100°–450 °C). Phyllosilicate minerals analysed include illite/smectite (I/S), phengite, muscovite, brammallite, paragonite, margarite and glauconite. Textural evolution primarily is towards larger, more defect-free grains with compositions that approach those of their respective end-members. The smectite-to-illite transformation reduced the amounts of the exchange components SiK−1Al−1, MgSiAl−2, and Fe3+Al−1. These trends continue to a lesser degree in the anchizone and epizone. Correlations between the proportion of smectite in I/S and the composition of I/S indicate that smectite layers may contain a high layer charge. Illite in I/S bears a compositional resemblance to macrocrystalline phengite in some samples, but is different in others. Paragonite first appears in the upper diagenetic zone or lower anchizone as an interlayer-deficient brammallite, and it may be mixed with muscovite on the nanometre scale. Owing to the small calculated structure factor for paragonite-muscovite superstructures, conventional X-ray powder diffraction cannot distinguish between mixed-layer structures and a homogeneous compositionally intermediate solid solutions. However, indirect TEM evidence shows that irregularly shaped domains of Na- and K-rich mica exist below 10 nm. Subsequent coarsening of domains at higher grades produced discrete paragonite grains at the margins of muscovite crystals or in laths parallel to the basal plane of the host muscovite. Margarite appears in the epizone and follows a textural evolution similar to paragonite in that mixtures of margarite, paragonite, and muscovite may initially occur on the nanometre scale. However, no evidence of interlayer-poor margarite has been found.
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  • 33
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: On Holsnøy, an island off the coast of Western Norway, an anorthositic complex metamorphosed to granulite facies was partially overprinted by a later eclogite facies metamorphism. Eclogite facies rocks (containing omphacite, garnet, kyanite and hydrous phases such as mica and zoisite) occur in shear zones of various scales and adjacent to veins. Previous studies of shear zones on Holsnøy reported evidence for substantial element mobility (Jamtveit et al., 1990; Mattey et al., 1994). In this work, we compare chemical compositions of granulite and its undeformed eclogitized equivalent adjacent to veins in locations where a single band of granulite can be traced and sampled as it approaches the vein. This tracing is crucial because the pre-granulite rocks cover a substantial compositional range, indicative of a petrologically variable protolith consisting of anorthosite, gabbro and jotunite. We analysed multiple core samples collected across nine separate granulite-eclogite transition zones located at veins in anorthositic, jotunitic and gabbroic protoliths for major and trace elements. For each transition, no compositional difference between the average granulite and average eclogite composition was found at the 90% confidence level except for LOI (loss on ignition), which was consistently significantly higher in the eclogite samples. Although not significant at the 90% confidence level for any single traverse, the average eclogite concentrations of SiO2 , Na2O, Cs, As and Br exceed the average granulite concentrations for eight or all nine of the traverses. For most traverses, statistical analysis of the data limits any gain of SiO2 in the eclogites to no more than a few relative per cent. Other than the introduction of volatile substances, presumably an H2O-rich fluid, eclogitization associated with vein formation was essentially isochemical.
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  • 34
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    Journal of metamorphic geology 15 (1997), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: A large mass of dolomitic marble including many eclogite blocks occurs in orthogneisses of the Rongcheng area of the Su-Lu province, eastern China. The marble consists mainly of dolomite, calcite (formerly aragonite), graphite, forsterite, diopside, talc, tremolite and phlogopite. Aggregates of talc and calcite occur at the boundary between dolomite and diopside. Tremolite is a reaction product between talc and calcite. Eclogite blocks are rimmed by dark green amphibolite. The primary mineral assemblage in the core of eclogite is Na-bearing garnet (up to 0.2 wt% Na2O), omphacitic pyroxene, clintonite and rutile. Secondary minerals are pargasitic/edenitic amphibole, plagioclase, sodic diopside, chlorite, zoisite and titanite. The peak metamorphic conditions, based on stability of the dolomite+forsterite+aragonite (now calcite)+graphite assemblage, under conditions where tremolite is unstable, are estimated at T =610–660 °C and P=2.5–3.5 GPa (for XCO=0.001). A reaction between dolomite and diopside to form talc under tremolite-unstable conditions indicates a temperature decrease under ultra-high-pressure conditions (P 〉2.4 GPa, XCO〈0.0013). The formation of secondary tremolite is consistent with a nearly adiabatic pressure decrease post-dating the ultra-high-pressure metamorphism. The temperature decrease under ultra-high-pressure conditions preceding decompression may reflect the underplating of a cold slab, and the rapid decompression probably corresponds to the upwelling stage promoted by the delamination of a downwelling lithospheric root. The P–T  conditions of the amphibolitization stage are estimated at 〈0.9 GPa and 〈460 °C, and are similar to conditions recorded by the surrounding orthogneisses.
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  • 35
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    Journal of metamorphic geology 15 (1997), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Macroscopic textures resulting from different atomic-scale mechanisms for metamorphic crystallization display different degrees of order, clustering, intergrowth and relative isolation of porphyroblasts. Data on the sizes and locations of thousands of crystals in a three-dimensional volume are required to identify reliably the mechanisms governing nucleation and growth of porphyroblasts from these textural features. These data can now be acquired by means of high-resolution computed X-ray tomography. Numerical models that simulate porphyroblast formation governed by either interface-controlled or diffusion-controlled reaction mechanisms indicate that quantitative textural analysis can discriminate between these possibilities. These numerical models also allow a comparison between textures predicted for different crystallization mechanisms and textures measured in natural samples, from which inferences can be drawn concerning the relative importance of these mechanisms in nature. An independent test of the validity of such inferences is possible for porphyroblasts such as garnet that may preserve prograde growth zoning and allow the examination of normalized radius–rate relations.
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  • 36
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    Journal of metamorphic geology 15 (1997), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Both magmatic and eclogitic parageneses are preserved in the gabbros of western Alpine ophiolites. Samples with relic magmatic mineralogies display partial transformation to eclogitic assemblages along cracks and grain boundaries. Gabbros with eclogitic mineralogies contain zoned pseudomorphs after olivine, comprising talc-rich cores with kyanite, Mg-chloritoid and omphacite in outer cores and garnet rims. The compositional zonation of these olivine pseudomorphs closely parallels that shown by olivines in hydrothermally altered ocean-floor gabbros.The eclogitic gabbros are hydrous, containing paragonite, zoisite and other water-bearing minerals, and it has been suggested that water was introduced during high-pressure metamorphism. However, the similarity of olivine alteration patterns to those of ocean-floor gabbros suggests that hydration and local metasomatism leading to the stability of aluminous minerals in olivine sites occurred during hydrothermal alteration prior to subduction. Oxygen-isotope systematics are consistent with this proposal: Alpine gabbros with magmatic relics have a mean δ18O value of 5.7±0.7, similar to that of unaltered oceanic crust, whereas eclogitic gabbros have a mean δ18O value of 4.8±0.9.This statistically significant difference is consistent with the eclogitic samples having undergone high-temperature ocean-floor alteration. The preservation of magmatic and hydrothermal δ18O values in ocean-floor gabbros that have been metamorphosed at 2–2.5 GPa (60–75 km) implies that the deeper levels of ocean crust have not experienced pervasive fluid flow during subduction or subsequent exhumation. Magmatic assemblages were preserved despite an overstep of eclogitization reactions by at least 0.6–1.1 GPa implying that equilibrium was not attained in undeformed parts of the system because of slow diffusion in water-deficient rock volumes.
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  • 37
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    Journal of metamorphic geology 15 (1997), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Rare earth element (REE) and yttrium concentrations of coexisting monazite and xenotime were determined from a suite of seven metapelites from the Variscan fold belt in NE Bavaria, Germany. The metapelites include a continuous prograde, mainly low-P (3–5 kbar) metamorphic profile from greenschist (c. 400 °C) to lower granulite facies conditions (c. 700 °C). The LREE (La–Sm) are incorporated preferentially in monoclinic monazite (REO9 polyhedron), whereas the HREE plus Y are concentrated in tetragonal xenotime (REO8 polyhedron). The major element concentrations of both phases in all rocks are very similar and do not depend on metamorphic grade. Monazite consists mainly of La, Ce and Nd (La0.20–0.23, Ce0.41–0.45, Nd0.15–0.18)PO4, all other elements are below 6 mol%. Likewise, xenotime consists mainly of YPO4 with some Dy and Gd solid solutions (Y0.76–0.80, Dy0.05–0.07, Gd0.04–0.06). In contrast, the minor HREE concentrations in monazite increase strongly with increasing metamorphic grade: Y, Dy and Gd increase by a factor of 3–5 from greenschist to granulite facies rocks. Monazite crystals often show zonation with cores low in HREE and rims high in HREE that is interpreted as growth zonation attained during prograde metamorphism. Similarly, Sm and Nd in xenotimes increase by a factor of 3–4 with increasing metamorphic grade. Prograde zonation in single crystals of xenotime was not observed. The XHREE+Y in monazite and XLREE in xenotime of the seven rocks define two limbs along the strongly asymmetric miscibility gap from c. 400 °C to 700 °C. The empirical calibration of the monazite miscibility gap limb coexisting with xenotime is appropriate for geothermometry. Due to its contents of U and Th, monazite has often been used for U–Pb age determination. The combination of our empirical thermometer on prograde zoned monazite along with possible age determination of zoned single crystals may provide information about prograde branches of temperature–time paths.
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  • 38
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    Journal of metamorphic geology 2 (1984), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: In north-central Wopmay Orogen, syntectonic low-P(Buchan-type) suites of mineral isograds outline regional metamorphic temperature culminations that are associated, at the higher structural levels, with emplacement of early Proterozoic plutons in the west part of a deformed and eastward transported continental margin prism. The mapped isograds mark the first occurrence of biotite, staurolite, andalusite, sillimanite, sillimanite-K feldspar and K feldspar-plagioclase-quartz ± muscovite (granitic) pods in metapelites, with increasing proximity to the plutons.Microprobe analyses and field observations have resulted in the formulation of reactions for the ‘ideal’pelitic system K2O-Na2O-FeO-MgO-Al2O3-SiO2-H2O-Al2O3-SiO2-H2O, to account for the various mineral assemblages of each metamorphic zone. A P-T petrogenetic grid showing erosion surface P-T curves for the northern Wopmay Orogen pelites, compiled on the basis of the mapped isograds and the inferred reaction(s) for each metamorphic zone, documents a variation in exposed metamorphic pressure ranging between 2 and 4 kbar.The configuration of a new bathograd, based on the invariant model reaction sillimanite + K feldspar + plagioclase + biotite + quartz + vapor ± muscovite + liquid and interpolated across three metamorphic suites, is consistent with a major regional structure culmination and with independently determined pressures obtained from anorthite-grossular-quartz-Al2SiO5 geobarometry. The positive correlation between the configuration of the bathograd and the structural and pressure culmination points to the pressure-dependence of anatectic-granitic-pod mineral associations.
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  • 39
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    Journal of metamorphic geology 2 (1984), S. 0 
    ISSN: 1525-1314
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    Topics: Geosciences
    Notes: Variations in assemblage and composition of the constituent minerals in basic and intermediate metavolcanics encountered in the Zarouchla Group of the Phyllite-Quartzite Series are consistent with a progressive sequence, corresponding to temperature conditions estimated at 290-380°C (minimum values) under a total pressure greater than 3°5kbar and possibly as high as 5 kbar. In the absence of more critical evidence, the parageneses recorded in the metavolcanic rocks are interpreted as belonging to a prograde facies series from the lawsonite-albitechlorite facies through the pumpellyite-actinolite facies to the greenschist facies. The present distribution of mineral assemblages does not show a simple increase of metamorphic grade in a given direction but is apparently related to the tectonic evolution of the metamorphic sequence.
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  • 40
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    Journal of metamorphic geology 2 (1984), S. 0 
    ISSN: 1525-1314
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    Topics: Geosciences
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    Journal of metamorphic geology 2 (1984), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Abstract Mylonites from shear zones cutting Hercynian gneisses in the central Pyrenees have been studied in thin section and using the electron microprobe. The shear zones contain retrogressive greenschist facies assemblages implying introduction of an aqueous fluid during deformation in the zones. Textural evidence suggests that fluid-rock interaction occurred throughout the active life of the shear zones.Whole-rock chemical changes during deformation are documented in a variety of mylonitic lithologies and retrogressed country rocks. The overall effect was to reduce chemical differences between lithologies. Activity diagrams show that this would be expected if a hydrous fluid was circulating between different lithologies during deformation. In most cases fluid/rock ratios were relatively small resulting in gradual chemical changes and repeated recrystallization. ‘Open-system’behaviour with reduction in the number of phases is seen in some granite mylonites, suggesting focusing of fluid movement in parts of the shear zones. Continual fluid-rock interaction may have led to reaction-enhanced ductility in the shear zones over a long period of time. The source of fluid is uncertain, but may be related to underthrusting of material beneath the area investigated.
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  • 42
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    Journal of metamorphic geology 2 (1984), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Abstract The hornblende-bearing basic gneisses in the Uvete area, central Kenya, were metamorphosed under a narrow range of P and T (6.5 ± 0.5kbar and 530 ± 40°C) of the staurolitekyanite zone in the Mozambique metamorphic belt. They show a wide variety of divariant and trivariant mineral assemblages consisting of hornblende, cumminatonite, gedrite, anthophyllite, chlorite, garnet, epidote, clinopyroxene, plagio-clase and quartz. The bulk and mineral chemistries and the graphical representation of phase relations show that each mineral assemblage approaches chemical equilibrium and defines a unique composition volume in the A′(Al + Fe3+− (13/7)Na)-F(Fe2+)-M′(Mg)-C′(Ca-(3/7)Na) tetrahedron. The composition volumes are distributed quite regularly and do not overlap each other.The phase relations in the Uvete area are in contrast with those in the staurolite-kyanite zone amphibolites in the Mt. Cube quadrangle, Vermont. The amphibolites there contain low-variance mineral assemblages formed under different values of μH2O and μCO2. These assemblages define overlapping composition volumes in the A′-F′-M′-C’tetrahedron.The mineral assemblages in the Uvete area are interpreted as having formed in equilibrium with fluid at a high and nearly constant μH2O value. Such a fluid composition was externally controlled by the supply of H2O-rich fluid expelled from the surrounding pelitic and psammitic rocks. The body size of the basic gneisses in the Uvete area (less than 400m in thickness) was small enough for the fluid to migrate completely.
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  • 43
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    Journal of metamorphic geology 2 (1984), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Abstract Blueschist-facies rocks on the Seward Peninsula constitute a structurally coherent terrane measuring at least 100 × 150 km. Radiometric age data indicate that high-pressure metamorphism probably occurred in Jurassic rather than in Palaeozoic or Precambrian time, as previously suggested. Protolith sediments (Nome Group) are of intracontinental basin or continental margin type, and of lower Palaeozoic and possibly late Precambrian age, thus predating the high pressure metamorphism by more than 200 m.y.Blueschist-facies mineral assemblages were developed in almost all lithologies of the Nome Group, and are best preserved in FeTi-rich metabasites (glaucophane + almandine + epidote) and pelites (glaucophane + chloritoid + phengite). A lawsonite–crossite subfacies was developed in possible Nome Group rocks on the east flank of the Darby Mountains. Albite–epidote–amphibolite facies assemblages characterize Nome Group rocks in the southwestern part of the Peninsula. Metamorphism in the central zone of the terrane passed from early lawsonitic to subsequent epidote–almandine–glaucophane schist subfacies with the local development (east of the Nome River) of eclogitic assemblages.The high pressure metamorphic minerals were synkinematic with the development of mesoscopic-scale intrafolial isoclinal folds and a flattening foliation of consistent orientation. Initiation of uplift probably corresponded to the growth of barroisite rims on earlier sodic and actinolitic amphiboles, and partial post-kinematic greenschist facies replacements record later stages of decompression. Ophiolites and melange are not associated with the Seward Peninsula blueschists. The high-pressure metamorphism was caused by tectonic loading of a continental plate by an allochthon of indeterminate origin. The PT conditions of high pressure metamorphism were approximately 9–11 kbar, 400–450°C, thus falling between the PT paths of the Shuksan and Franciscan terranes.
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  • 44
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    Journal of metamorphic geology 2 (1984), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Abstract Two periods of garnet growth (Gt1 and Gt2) have been found in the Finnmarkian nappes of north Norway. In the Kolvik Nappe (the lowest nappe) Gt1 has preserved an S2 syntectonic spiral inclusion fabric; in the Olderfjord Nappe an earlier S1 fabric and an interkinematic inter-D1–D2 fabric have been preserved in Gt1 whilst only the S1 fabric has been found in Gt1 in the Brennsvik Nappe (the highest nappe). In each nappe Gt2 overgrew a penetrative fabric (S2) wrapped around Gt1. In the Kolvik Nappe inclusion fabrics may be continuous from Gt1 into Gt2 but in the higher nappes there is a distinct break. Gt2 may have been partially syntectonic with D3 in the Brennsvik Nappe.Chemically Gt1 in the Kolvik Nappe and in parts of the Olderfjord and Brennsvik Nappes has antithetic Fe-Mn zoning. In all nappes XCa and XMg are weakly zoned in Gt1; XMg increases outwards and is greater in the higher nappes in Gt1 suggesting higher nucleation temperatures. In the Olderfjord and Brennsvik Nappes Gt2 is marked by increasing XCa, probably due to changing garnet-plagioclase equilibria, although the Fe/Mg ratio remains constant. XMg is higher in Gt2 than Gt1.Basement rocks within the nappe pile have an early pre-Finnmarkian growth (Gt1) and a later Finnmarkian growth (GtH) correlated with Gt2 on the basis of chemical zoning patterns.The diachroneity of Gt1 is ascribed to progressively earlier (compared to the structural development) cessation of overstepping of garnet-forming reactions before peak metamorphism in the higher nappes, resulting in earlier structural events being preserved.
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  • 45
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Abstract Fluid inclusion studies of rocks from the late Archaean amphibolite-facies to granulite-facies transition zone of southern India provide support for the hypothesis that CO2,-rich H2O-poor fluids were a major factor in the origin of the high-grade terrain. Charnockites, closely associated leucogranites and quartzo-feldspathic veins contain vast numbers of large CO2-rich inclusions in planar arrays in quartz and feldspar, whereas amphibole-bearing gray gneisses of essentially the same compositions as adjacent charnockites in mixed-facies quarries contain no large fluid inclusions. Inclusions in the northernmost incipient charnockites, as at Kabbal, Karnataka, occasionally contain about 25 mol. % of immiscible H2O lining cavity walls, whereas inclusions from the charnockite massif terrane farther south do not have visibile H2OMicrothermometry of CO2 inclusions shows that miscible CH4 and N2 must be small, probably less than 10mol.%combined. Densities of CO2 increase steadily from north to south across the transitional terrane. Entrapment pressures calculated from the CO2 equation of state range from 5 kbar in the north to 7.5 kbar in the south at the mineralogically inferred average metamorphic temperature of 750°C, in quantitative agreement with mineralogic geobarometry. This agreement leads to the inference that the fluid inclusions were trapped at or near peak metamorphic conditions.Calculations on the stability of the charnockite assemblage biotite-orthopyroxene-K-feldspar-quartz show that an associated fluid phase must have less than 0.35 H2O activity at the inferred P and T conditions, which agrees with the petrographic observations. High TiO2 content of biotite stabilizes it to lower H2O activities, and the steady increase of biotite TiO2 southward in the area suggests progressive decrease of aH2O with increasing grade. Oxygen fugacities calculated from orthopyroxene-magnetite-quartz are considerably higher than the graphite CO2-O2 buffer, which explains the absence of graphite in the charnockites.The present study quantifies the nature of the vapours in the southern India granulite metamorphism. It remains to be determined whether CO2-flushing of the crust can, by itself, create large terranes of largeion lithophile-depleted granulites, or whether removal of H2O-bearing anatectic melts is essential.
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  • 46
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    Journal of metamorphic geology 2 (1984), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Abstract There are discrete masses of un-deformed metabasite within the blueschist series of the island of Syros. Greece. Around the margins of these masses are zonal sequences through rocks showing intracrystalline deformation but without a geometric fabric, to rocks with discrete and anastomosing shear zones, and finally to penetratively foliated rocks with isolated relics of the original undeformed texture. Textural relics suggest that this spatial sequence is at least qualitatively also a temporal sequence.This progressive shear zone deformation took place concurrently with a glaucophane-epidote to eclogite reaction. The reaction pathways in the rocks that underwent the shear zone deformation can be compared with those in rocks of a similar composition that suffered a longer deformation history and show no relics of an undeformed parent. Although the final assemblages are in both cases the same, the pathways are different. These differences are in part related to reactions promoted by the change from local to bulk equilibrium on the onset of deformation in the rocks. They are also related to the crystallization and later breakdown during the sequence of progressive equilibration of a metastable phase, in this case an impure glaucophane.
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  • 47
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    Journal of metamorphic geology 2 (1984), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Abstract The Rockley Volcanics from near Oberon, New South Wales occur within the aureole of the Carboniferous Bathurst Batholith and have been contact metamorphosed at P ∼ 100 ± 50MPa (10.5kbar) and a maximum T ∼ 565°C in the presence of a C–O–H fluid. Prior to contact metamorphism the volcanics were regionally metamorphosed and altered with the extensive development of actinolite, chlorite, plagioclase, quartz and calcite. The contact metamorphosed equivalents of these rocks have been subdivided into: Ca-poor (cordierite + gedrite), Mg-rich (amphibole + olivine + spinel), mafic (amphibole + plagioclase) and Ca-rich (amphibole + garnet + diopside; diopside + plagioclase; garnet + diopside + wollastonite) rocks.The chemistry of the minerals in the hornfelses was controlled by the bulk rock chemistry and fluid composition. Pargasites and hastingsites as well as an unusual phlogopite with blue green pleochroism, are found in Ca-rich hornfelses. A comparison of the assemblages with experimentally derived equilibria suggests that the fluid phase associated with the Ca-rich hornfelses was water-rich (Xco2= 0.1 to 0.3) while that associated with the Mg-rich hornfelses was enriched in CO2 (Xco2 〉 0.7). The different hornfels types have reacted to contact metamorphism independently in both their solid and fluid chemistries.
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  • 48
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    Journal of metamorphic geology 2 (1984), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Abstract A garnet–hornblende Fe–Mg exchange geothermometer has been calibrated against the garnet–clinopyroxene geothermometer of Ellis & Green (1979) using data on coexisting garnet + hornblende + clinopyroxene in amphibolite and granulite facies metamorphic assemblages. Data for the Fe–Mg exchange reaction between garnet and hornblende have been fitted to the equation. In KD=Δ (XCa,g) where KD is the Fe–Mg distribution coefficient, using a robust regression approach, giving a thermometer of the form: with very satisfactory agreement between garnet–hornblende and garnet–clinopyroxene temperatures. The thermometer is applicable below about 850°C to rocks with Mn-poor garnet and common hornblende of widely varying chemistry metamorphosed at low aO2.Application of the garnet–hornblende geothermometer to Dalradian garnet amphibolites gives temperatures in good agreement with those predicted by pelite petrogenetic grids, ranging from 520°C for the lower garnet zone to 565–610°C for the staurolite to kyanite zones. These results suggest that systematic errors introduced by closure temperature problems in the application of the garnet–clinopyroxene geothermometer to the ‘calibration’data set are not serious. Application to ‘eclogitic’garnet amphibolites suggests that garnet and hornblende seldom attain Fe–Mg exchange equilibrium in these rocks.Quartzo-feldspathic and mafic schists of the Pelona Schist on Sierra Pelona, Southern California, were metamorphosed under high pressure greenschist, epidote–amphibolite and (oligoclase) amphibolite facies beneath the Vincent Thrust at pressures deduced to be 10±1 kbar using the phengite geobarometer, and 8–9kbar using the jadeite content of clinopyroxene in equilibrium with oligoclase and quartz. Application of the garnet–hornblende thermometer gives temperatures ranging from about 480°C at the garnet isograd through 570°C at the oligoclase isograd to a maximum of 620–650°C near the thrust. Inverted thermal gradients beneath the Vincent Thrust were in the range 170 to 250°C per km close to the thrust.
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  • 49
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Sapphirine occurs in a 3-5 m wide zone between amphibole-lherzolite and garnetiferous metagabbro at Finero in the Ivrea Zone, NW Italian Alps. Layers consisting of plag + hb + sa + cpx + opx + sp + gt are interbanded with spinel pyroxenites, which may contain sapphirine replacing spinel. All minerals are very magnesian, with XMg between 0.78 and 0.92. Bulk rock analyses suggest that precursors to the sapphirine-bearing rocks were igneous cumulates of plagioclase + olivine + hornblende + spinel. Up to 16wt% CaO does not inhibit sapphirine formation and it is the unusually Mg-rich nature of the host rocks which allows sapphirine development. The early igneous assemblage was replaced by one of cpx + sa + hb +± plag at a pressure of 9 ± 1 kbar and temperatures of 900 ± 50°C. Subsequent rapid uplift caused the instability of gt, gt + hb, hb and sa + cpx to form opx + plag ± sp ± sa symplectites.
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  • 50
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    Journal of metamorphic geology 1 (1983), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: The Gran Paradiso basement complex of the French and Italian Alps is composed of metasediments, termed the gneiss minuti, and metabasic rocks, both of which are intruded by a late Hercynian granite. The Bonneval gneiss, which crops out at the western edge of the complex, is composed of highly deformed metasediments, volcanics and volcaniclastic rocks. Eclogites, now highly altered, occur in the metabasic rocks. Kyanite and blue-green amphibole are locally present in the gneiss minuti and aegirine plus riebeckite occur in the Bonneval gneiss. A moderately high pressure - low temperature metamorphic event of probable Alpine age occurred in the basement complex. This metamorphic event differs from that in the overlying Sesia unit and ophiolites of the Schistes lustrés nappe in being at lower pressures (below the ab = jd100+ qz transition) and post-dating the major (D2A) deformation. The origin of the metamorphism is discussed and interpreted as a probable consequence of the overlying nappe pile which was emplaced during the D2A event. Subsequent greenschist facies metamorphism in the basement complex is a consequence of thermal relaxation during uplift.
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  • 51
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    Journal of metamorphic geology 1 (1983), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Abstract. A method for the quantitative analysis of the spatial relations of minerals is described. Dispersed distributions are formed by annealing and destroyed in post-tectonic migmatization. Aggregate distributions characterize solid-state differentiation, whereas leucosomes formed in systems of high fluid:rock ratio (in the examples studied, anatectic melts) show random distributions.Quantitative textural analysis can be used to indicate whether migmatization was post-tectonic or earlier, though caution is necessary if post-migmatite cooling is slow or if there is some minor deformation. More importantly, it can be used to discriminate melt-present from melt-absent leucosomes; this is exemplified by a suite of metamorphic and anatectic migmatites from the Scottish Caledonides.The textural evolution of anatexites with increasing melt percentage is traced. Initial feldspar porphyroblastesis occurs by Ostwald ripening via grain boundary melts; subsequently ophthalmites develop with fabrics and chemistry inherited from the palaeosome. At greater than 30% melt these inherited fabrics are wholly destroyed. Deformation prompts segregation into melanosome and leucosome; resultant leucosomes contain no inherited crystals. The scale of anatectic systems is fixed at the point at which segregation begins; ophthalmites provide evidence for melt and crystal transfer beyond original palaeosome boundaries. In contrast, metamorphic migmatites are necessarily small-scale systems because of diffusive constraints, and melanosomes are invariably produced.
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  • 52
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: The oligoclase-biotite zone of the Bessi area, central Shikoku is characterized by sodic plagioclase (XCa= 0.10–0.28)-bearing assemblages in pelitic schists, and represents the highest-grade zone of the Sanbagawa metamorphic terrain. Mineral assemblages in pelitic schists of this zone, all with quartz, sodic plagioclase, muscovite and clinozoisite (or zoisite), are garnet + biotite + chlorite + paragonite, garnet + biotite + hornblende + chlorite, and partial assemblages of these two types. Correlations between mineral compositions, mineral assemblages and mineral stability data assuming PH2O = Psolid suggests that metamorphic conditions of this zone are about 610 ± 25°C and 10 ± 1 kbar.Based upon a comparative study of mineralogy and chemistry of pelitic schists in the oligoclase-biotite zone of the Sanbagawa terrain with those in the New Caledonia omphacite zone as an example of a typical high-pressure type of metamorphic belt and with those in a generalized‘upper staurolite zone’as an example of a medium-pressure type of metamorphic belt, progressive assemblages within these three zones can be related by reactions such as:
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  • 53
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    Journal of metamorphic geology 1 (1983), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: An assemblage consisting of corundum, sapphirine, spinel, cordierite, garnet, biotite and bronzite is described from the Messina area of the Limpopo Mobile Belt, and consideration given to its petrogenesis. Various geothermometers and geobarometers have been applied in an attempt to determine the temperatures and pressures of metamorphism.A former coexistence of garnet and corundum is suggested to have developed during the earliest high pressure phase of the metamorphism, where temperatures exceeded 800°C and pressures as high as 10kbar may have been experienced. Subsequently, continuous retrograding reactions from medium pressure granulite facies at about 800°C and 8kbar towards amphibolite facies generated spinel, cordierite, sapphirine and possibly also bronzite. The most notable reaction was probably of the form: garnet + corundum = cordierite + sapphirine + spinel.
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  • 54
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    Journal of metamorphic geology 1 (1983), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: A review of currently available information relevant to the Basal Gneiss Complex (BGC) of Western South Norway, combined with the authors’own observations, leads to the following conclusions.1. Most of the BGC consists of Proterozoic crystalline rocks and probably subordinate Lower Palaeozoic cover.2. The last major deformation of these rocks was during the Caledonian orogeny and involved large-scale thrusting, recumbent folding and doming. The structural development of the BGC is closely tied in with that of the Caledonian allochthon.3. The whole eclogite-bearing part of the BGC has suffered a high pressure metamorphism with conditions of between 550°C, 12.5 kbar (Sunnfjord) and about 750°C, 20 kbar (Møre og Romsdal) at the metamorphic climax.4. This metamorphism was of Caledonian age, probably rather early in the Caledonian tectonic history of the BGC and is considered to have been a rather transient event.By setting these conclusions in a framework provided by geophysical evidence for the deep structure of the crust in southern Norway we have constructed a geotectonic model to explain the recorded metamorphic history of the BGC. It is suggested that considerable crustal thickening was caused by imbrication of the Baltic plate margin during continental collision with the Greenland plate. This resulted in high pressure metamorphism in the resulting nappe stack. Progradation of the suture caused underthrusting of the Baltic foreland below the eclogite-bearing terrain causing it to emerge at the Earth's surface, aided by tectonic stripping and erosion.Application of isostacy equations to the model shows that eclogites can be formed by in-situ metamorphism in crustal rocks and reappear at the land surface above a normal thickness of crust in a single orogenic episode of approximately 65-70 Ma duration.
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  • 55
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    Journal of metamorphic geology 1 (1983), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Detailed geochronological, structural and petrological studies reveal that the geological evolution of the Field Islands area, East Antarctica, was substantially similar to that of the adjacent Archaean Napier Complex, though with notable differences in late and post Archaean times. These differences reflect the area's proximity to the Proterozoic Rayner Complex and consequent vulnerability to tectonic process involved in the formation of the latter. Distinctive structural features of the Field Islands are (1) consistent development of a discordant, pervasive S3 axial-plane foliation; (2) re-orientation of S3 axial planes to approximate to the subsequent E-W tectonic trend of the nearby Rayner Complex; (3) selective retrogression by a post-D3 static thermal overprint; and (4) relatively common development of retrogressive, E-W-trending, mylonitic shear zones.Peak metamorphic conditions in excess of 800°C at 900 ± 100 M Pa (9 kbar) were attained at one locality following, but probably close to the time of D2 folding. D3 took place in late Archaean times when metamorphic temperatures were about 650°C and pressures were about 600 MPa (6 kbar). Later, temperatures of 600 ± 50°C and pressures of 700 MPa (7kbar) were attained in an amphibolite-facies event, presumably associated with the widespread granulite to amphibolite-facies metamorphism and intense deformation involved in the formation of the Rayner Complex at about 1100 Ma. The area was subsequently subjected to near-isothermal uplift.Rb-Sr isotopic data indicate that the pervasive D3 fabric developed at about 2400–2500 Ma, and this age can be further refined to 2456+8-5 Ma by concordant zircon analyses from a syn-D3 pegmatite. All zircons were affected by only minor (〈7–10%) Pb loss and/or new zircon growth during the Rayner event at about 1100Ma. Thus the 450–850 μg/gU concentrations of these zircons were too low to cause sufficient lattice damage over the 1350 Ma (from 2450 Ma) for excessive Pb to be lost during the 1100 Ma event. The emplacement of pegmatite at 522 ± 10 Ma substantially changed the Rb-Sr systematics of the only analysed rock that developed a penetrative fabric during the 1100 Ma event. Monazite in this pegmatite contains an inherited Pb component, which probably resides in small opaque inclusions.A good correlation is found between Rb-Sr total-rock ages and rock fabric. U-Pb zircon intercepts with concordia also mostly correspond to known events. However, in one example a near perfect alignment of zircon analyses, probably developed by mixing of unrelated components, produced concordia intercepts that appear to have no direct geochronological significance.
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  • 56
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    Journal of metamorphic geology 15 (1997), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Ultrahigh-temperature quartz-sapphirine granulite xenoliths in the post-Karoo Lace kimberlite, South Africa, comprise mainly quartz, sapphirine, garnet and sillimanite, with rarer orthopyroxene, antiperthite, corundum and zinc-bearing spinel; constant accessories are rutile, graphite and sulphides. Comparison with assemblages in the experimentally determined FMAS and KFMASH grids indicates initial equilibration at 〉1040 °C and 9–11 kbar. Corona assemblages involving garnet, sillimanite and minor cordierite developed on a near-isobaric cooling P–T  path as both temperature and, to a lesser extent, pressures decreased. Garnet-orthopyroxene Fe-Mg exchange thermometers record temperatures of only 830–916 °C. These estimates do not indicate the peak metamorphic conditions but instead reflect the importance of post-peak Fe-Mg exchange during cooling. Correction of mineral Fe-Mg compositions for this exhange using a convergence approach of Fitzsimons & Harley (1994) leads to retrieved P–T  estimates from garnet-orthopyroxene thermobarometry (c. 1000 °C and 10.5±0.7 kbar) that are consistent with the petrogenetic grid constraints. U-Pb dating of a single zircon grain gives an age of 2590±83 Ma, interpreted as the age of the metamorphic event. Protolith major and trace element chemistries of the xenoliths differ from sapphirine-quartzites typical of the Napier Complex (Antarctica) but are comparable to less siliceous, high Cr and Ni, sapphirine granulites reported from several ultrahigh temperature granulite terranes.
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  • 57
    ISSN: 1525-1314
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    Topics: Geosciences
    Notes: Annealing experiments on agate, quartz schist and metachert at 800–1000 °C, confining pressures of 400 and 800 MPa, and annealing times of 6.0×10–3.6×105s revealed normal grain growth of quartz in the agate, grain-size increasing with time, but the rate of grain growth decreasing with increasing grain size.The boundaries of agate with quartz schist and metachert migrated into the agate at the expense of fine-grained quartz in the agate. The driving force for the migration appears to be the reduction of surface energy associated with removal of fine-grained quartz in the agate. Assuming the activation energy as Qm=11 kcal mol−1, a general expression for the relationship between velocity of boundary migration (V ) and driving force (P ) is where γ is the specific surface energy of quartz, R is the gas constant and T  is the absolute temperature. The velocity is relatively fast at high temperatures on a geological time-scale. The expression assists a quantitative understanding of the microstructural development of quartz at metamorphic conditions.
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  • 58
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    Journal of metamorphic geology 15 (1997), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Calculations based on a KMnFMASH petrogenetic grid derived using an internally consistent thermodynamic dataset indicate that the principal effect of the presence of Mn in average subaluminous pelite compositions is to stabilize garnet to higher and lower pressures and temperatures over a wide range of bulk compositions. Garnet-bearing fields expand to lower temperatures and pressures with the addition of Mn, and garnet appears as an extra phase at low pressures. The addition of Mn also increases the number and extent of four AMnFM phase assemblages and stabilizes five AMnFM phases along univariant reactions. The KMnFMASH system predictions for typical subaluminous pelite bulk compositions match the sequence of isograds and assemblages observed in the Barrovian zones. The sequence of assemblages observed in the Stonehaven section can also be predicted if there is variation in bulk composition within the stratigraphic section. Mn appears to be less important in producing the sequence of isograds and garnet-absent assemblages in the low-pressure Buchan zones. The addition of Mn to the calculations does not change the sequence of isograds that are predicted to be stable in a regional metamorphic terrane, but the P–T position of these isograds does change. In particular, the predicted temperature of the garnet-in isograd is lowered by as much as 100 °C by the addition of Mn to KFMASH. Mn also increases the range of metapelite bulk compositions that develop the assemblages traditionally identified as metapelite isograds.
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  • 59
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    Journal of metamorphic geology 15 (1997), S. 0 
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    Topics: Geosciences
    Notes: The Moldanubian zone in Austria comprises three major lithological units. Despite general agreement that nappe tectonics contributed to its current structure, the number and position of tectonic boundaries, or continental pieces that were involved in its evolution, as well as the age, extent and position of oceanic sutures are disputed. Recent models ascribe the Moldanubian tectonostratigraphic structure to its oblique, N- to NE-directed collision with Moravia only.The rocks of the Moldanubian Bunte series and Gföhl unit experienced a common, intensive overprint in the range 700–800 °C and 8–11 kbar. Textural evidence suggests that this overprint was attained during nearly isothermal decompression, so the rocks experienced higher pressures prior to this overprint. These conditions constrain a continent–continent collision environment that contributed to the formation of the Moldanubian granulites. The estimated metamorphic temperatures are close to Tmax. During this Hercynian, high-T  overprint, the minerals underwent extensive diffusion-controlled homogenization of elements. The early stages of retrogression of these units were characterized by isobaric cooling at c. 6 kbar in the range 650–500 °C that is related to the oblique collision of the Moldanubian and Moravian zones. Cooling to c. 400 °C is demonstrated by unstrained, diasporized corundum inclusions in garnet of common Moldanubian granulites.The available age data (including cooling ages) from metamorphic rocks show a very wide variation between 490 and 280 Ma that depends on sample characteristics and the dating method used. They demonstrate clearly, however, that the metamorphic overprint is Hercynian. The possibility that the large variation in ages reflects homogenization, resetting and closure of the isotopic systems attained at different, sample- and method-specific times is discussed. Age data varying between c. 370 and c. 346 Ma tentatively date different stages during the Hercynian, high-T  decompression. The majority of zircon and monazite U/Pb ages as well as the hornblende and muscovite Ar/Ar cooling ages cluster between c. 345 and c. 326 Ma and date the effective closure conditions and the onset of rapid, nearly isobaric cooling. The continent–continent collision that formed the granulites pre-dates c. 370 Ma. The intra-Moldanubian nappe-stacking pre-dates thrusting of the Moldanubian zone over the Moravian zone. The range c. 340–335 Ma is the lower limit for completion of tectonic activity in the Moldanubian zone.The Moldanubian series are post-tectonically intruded by granitoids of the Southern Bohemian Pluton. Recent age determinations and geochemical evidence suggest that the formation of the early granitoid types took place in the lower crust in connection with the Hercynian high-grade overprint.The Moldanubian Monotone series in Austria is separated from the other Moldanubian units by a conspicuous tectonic horizon. It also differs from them by its characteristic high-T , low-P overprint, which is best demonstrated by a widespread cordierite gneiss.
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    Journal of metamorphic geology 15 (1997), S. 0 
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    Topics: Geosciences
    Notes: The most widely used technique for the determination of high precision mineral growth ages in igneous and metamorphic rocks is dating of zircons with the U-Pb method. The interpretation of these ages, particularly in metamorphic settings, is hampered by an incomplete understanding of the common phenomenon of partial Pb-loss in zircon. In principle, this Pb-loss may occur in four very different ways: diffusion in metamict zircon, diffusion in pristine zircon, leaching from metamict zircon and recrystallization of metamict zircon. Here it is argued that, under conditions common in the continental crust, Pb-loss is only possible in partially to strongly metamict zircons. Pb-diffusion in the pristine zircon lattice is insignificant up to temperatures of at least 1000 °C. Pb-loss is only possible if the zircons experienced a time interval below their annealing temperature of about 600–650 °C, because only below this temperature can the lattice damage through α-decay and spontaneous fission accumulate. Zircons that remain above this temperature do not lose Pb by diffusion and will stay closed systems. Complete resetting of the U-Pb system in zircon under crustal conditions is only possible through dissolution and reprecipitation of zircon. Partial resetting results from recrystallization, leaching or diffusion in metamict zircon. As a consequence, special care has to be taken to interpret lower intercepts on concordia diagrams defined by discordant U-Pb data. Lower intercept ages may be significant only if they are defined by zircons with low U-content (〈100 p.p.m.) or if confirmed by other geochronological methods. In addition, the accuracy of the lower intercept should be confirmed by abrading the zircon fractions that define the discordia.
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    Topics: Geosciences
    Notes: The Vincent thrust of the San Gabriel Mountains, southern California, separates eugeoclinal Pelona Schist from overlying Precambrian to Mesozoic igneous and metamorphic rocks of North American continental affinity. The thrust is generally considered to be synmetamorphic because of similarity in structural orientations and mineral assemblages between the Pelona Schist and mylonites at the base of the upper plate. In this study, compositions of calcic amphibole and plagioclase in the upper plate and structurally high Pelona Schist were compared to further test this interpretation. Amphibole in the schist is mostly actinolite to actinolitic hornblende with high Na/Al ratio, indicating relatively high-P/low-T  metamorphism. Individual grains are zoned, with concentrations of both Na and Al decreasing from cores to rims. Premylonitic amphibole in the upper plate is hornblende, tschermakite and pargasite with compositions indicative of low- or medium-P metamorphism. During mylonitization, this amphibole was replaced by actinolite to actinolitic hornblende with a similar range of Na and Al as amphibole rims in the Pelona Schist, but with slightly lower Na/Al ratio. This is consistent with the decrease of Na/Al up-section previously noted within the Pelona Schist of this area, and is considered to be the result of an inverted thermal gradient during thrusting. Convergence of composition between schist and upper plate also occurs for K and Ti contents of amphibole and An content of plagioclase. These features provide strong evidence that mylonitization of the upper plate is closely related in space and time to metamorphism of the Pelona Schist and therefore that the Vincent thrust is a remnant of the primary fault along which the Pelona Schist and correlative units were subducted beneath North America. Nonetheless, very fine-scale differences in amphibole composition between the schist and upper plate may indicate that metamorphic re-equilibration could not quite keep pace with movement on the fault.
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    Journal of metamorphic geology 15 (1997), S. 0 
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    Topics: Geosciences
    Notes: Anatectic migmatites in medium- to low-pressure granulite facies metasediments exposed in the Larsemann Hills, East Antarctica, contain leucosomes with abundant quartz and plagioclase and minor interstitial K-feldspar, and assemblages of garnet–cordierite–spinel–ilmenite–sillimanite. Qualitative modelling in the system K2O–FeO–MgO–Al2O3–SiO2–H2O–TiO2–O2, in conjunction with various P–T  calculations indicate that the high-grade retrograde evolution of the terrane was dominated by decompression from peak conditions of c. 7 kbar at c. 800 °C to 4–5 kbar at c. 750 °C. Extensive partial melting during decompression involved the replacement of biotite by the assemblage cordierite–garnet–spinel within the leucosomes. These leucosomes represent the site of partial melt generation, the cordierite–garnet–spinel–ilmenite assemblage representing the solid products and excess reactants from the melting reaction. The extraction and accumulation of this decompression-generated melt led to the formation of syntectonic pegmatites and extensive granitic plutons. Leucosome development and terrane decompression proceeded during crustal transpression, synchronous with upper crustal extension, during a progressive Early Palaeozoic collisional event. Subsequent retrograde evolution was characterized by cooling, as indicated by the growth of biotite replacing spinel and garnet, thin mantles of cordierite replacing spinel and quartz within metapelites, and garnet replacing orthopyroxene and hornblende within metabasites. P–T calculations on late mylonites indicate lower grade conditions of formation of c. 3.5 kbar at c. 650 °C, consistent with the development of late cooling textures.
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    Journal of metamorphic geology 2 (1984), S. 0 
    ISSN: 1525-1314
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    Topics: Geosciences
    Notes: Coexisting Ca-poor and Ca-rich pyroxenes in granulites at Cape Riche, in the Precambrian Albany-Fraser Province, Western Australia, are dominantly chemically homogeneous within individual samples, suggesting a major episode of equilibration. However, occasional grains in a few samples contain exsolved domains interpreted as relics of an earlier, higher-T assemblage. Pyroxene pairs in ten, presumably isothermal, samples from a restricted area are used to (i) assess the suitability of several versions of the two-pyroxene thermometer for application to metamorphic rocks, and (ii) determine the thermal history of the Cape Riche pyroxenes.The various versions of the two-pyroxene thermometer applied to the well-equilibrated homogeneous pyroxene grains show poor to good precision and yield mean temperatures varying widely from 683° to 893°C, in the following order of increasing T: Lindsley (1983; opx version), 683°± 11°C; Kretz (1982; KD version), 705°± 19°C; Ross & Huebner (1975), 709°± 30°C; Kretz (1982; solvus version), 735°± 24°C; Fonarev & Graphchikov (1982; opx version), 〈750°C; Lindsley (1983; cpx version), 784°± 40°C; Fonarev & Graphchikov (1982; cpx version), ~820°± 30°C; Wood & Banno (1973), 849°± 16°C; Powell (1978), 854°± 23°C; Wells (1977), 893°± 10°C. Independent T estimates, based on mafic assemblages and garnet-biotite thermometry, suggest that the major episode of metamorphism occurred at 700-800°C (P ~ 5 kbar). Therefore the Wells, Powell, Wood & Banno and Fonarev & Graphchikov (cpx) temperatures are almost certainly too high. In the absence of a more precise independent T estimate it is difficult to assess the relative merits of the results obtained from the remaining versions of the two-pyroxene thermometer, none of which can be unequivocally demonstrated to be seriously in error, though the Lindsley (opx) T is probably too low. Other significant shortcomings evident in the results include the relatively poor precision obtained from the three methods based on purely graphical representation of the augite limb of the solvus (i.e., the Ross & Huebner, Fonarev & Graphchikov (cpx) and Lindsley (cpx) versions), and the apparent dependence of derived T on Mg/Fe2+ ratio for the Powell, Wood & Banno and Lindsley (cpx) methods.For the bulk compositions of exsolved domains, the different versions of the two-pyroxene thermometer yield mean temperatures 23° to 82°C (overall mean, 65°C) higher than for homogeneous grains in the same samples. These exsolved domains are interpreted as relics of a higher-T (peak?) metamorphic assemblage, rather than an igneous precursor.
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    Journal of metamorphic geology 2 (1984), S. 0 
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    Topics: Geosciences
    Notes: This work presents the results of a fluid inclusion study of an amphibolite-granulite facies transition in West Uusimaa, S.W. Finland. Early fluid-inclusions in the granulite facies area are characteristically carbonic (CO2), in contrast to predominantly aqueous early inclusions in the amphibolite facies area. These early inclusions can be related to peak metamorphic conditions (750-820°C and 3-5 kbar for peak granulite facies metamorphism). Relatively young CO2 inclusions with low densities (〈0.8g/cm3) indicate that the first part of the cooling history of the rocks was characterized by a near isothermal uplift.N2-CH4 inclusions, with compositions ranging between pure CH4 and pure N2 (Raman spectral analysis), were found in the whole area. They are probably syn- or even pre-early inclusions. Only nearly critical homogenizing inclusions have been found (low density). Pressure estimates, based on densities of early fluid inclusions, show that the rapid transition of amphibolite towards granulite facies metamorphism is virtually isobaric. Granulite facies metamorphism in West Uusimaa is a thermal event, probably induced by the influx of hot, CO2-bearing fluids.
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    Journal of metamorphic geology 2 (1984), S. 0 
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    Topics: Geosciences
    Notes: Multisystems of n+k (k 〉 3) phases are very complicated and knowledge of them has suffered as a result. The successful solution of the topological relationships in n+ 3 phase multisystems by Zen (1966, 1967) and Zen & Roseboom (1972) has aroused much interest regarding what will happen in a multisystem of more than n+ 3 phases. Since 1979, some important research results on this topic have been published. These results have expounded the substantial rules governing the appearance of phase relations in phase diagrams of n - k (k 〉 3) phase multisystems. The most significant conclusions include: (1) It is impossible to incorporate all the possible phase relations in an n+k (k 〉 3) phase multisystem in a single closed net. Therefore, it is no longer enough to use only a single closed net to depict the topological relations involved in these types of multisystems. Instead, one or more groups of closed nets, namely the complete system(s) of closed nets are necessary for this purpose. (2) A principle called the Combination Principle has been proposed and proved. It states: Any closed net of one n+k (k 〉 3) phase multisystem must be a combination of two or more distinct n+ 3 order submultisystem closed nets belonging to the given n+k phase multisystem, if it is not one of the n+ 3 order submultisystem closed nets itself. The combination principle provides both a theoretical basis and a practical method for the construction of closed nets and, hence, for the derivation of the real phase diagrams for any n+k (k 〉 3) phase multisystem. (3) A theorem on divariant-assemblage-characteristic-stability-polygons is also important to our understanding of the n+k (k± 3) phase multisystem closed nets. This theorem can be stated as follows: A divariant assemblage of an n+k (k± 3) phase multisystem will be stable in an l-polygon lacking diagonals in an appropriate set of closed-net-diagrams, and this l-polygon may be at least a triangle, and at most a k-polygon. In addition, the closed-net-diagrams of unary and binary n+ 4 phase multisystems derived respectively by Guo (1980b, 1980c, 1981a) and by Roseboom & Zen (1982) have also been summarized. The combination principle is applied to a practical petrological problem in this paper, dealing with 7 phases in the system FeO-Fe2O3-SiO2.
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    Journal of metamorphic geology 2 (1984), S. 0 
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    Journal of metamorphic geology 2 (1984), S. 0 
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    Topics: Geosciences
    Notes: Abstract The stability of quartz-chloritoid-staurolite-almandine-cordierite and aluminium silicates is used to constrain both metamorphic conditions and pressure-temperature trajectories for two localities within the 2700 Ma Archaean Yilgarn Block in Western Australia. Available experimental data are used to calculate thermodynamic data for a self-consistent set of equilibria between these minerals. A lower amphibolite facies locality from the margin of a lower strain area contains assemblages including quartz-chloritoid-staurolite-garnet-biotite with altered cordierite replacing chloritoid, quartz-staurolite-andalusite, and quartz-cordierite-andalusite-biotite. This locality was heated to 530–560°C in the andalusite field, at 4.2 kbar. A sample from a mid- to upper-amphibolite facies, highly strained locality contains relict staurolite enclosed by andalusite, in turn replaced by cordierite and muscovite with biotite and sillimanite in the matrix. The assemblage was heated isobarically from conditions near the maximum experienced by the lower grade locality of 560°C at 4.2 kbar to temperatures in excess of the andalusite-sillimanite transition but within the quartz plus muscovite stability field (600–650°C). The higher grade locality is close to a granitoid dome and sections based on gravity profiles reveal that this locality is underlain by granitoid at shallow depths. The higher grade metamorphism apparently reflects superposition of the thermal aureole on regional metamorphic conditions similar to those in the lower grade areas.
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    Journal of metamorphic geology 2 (1984), S. 0 
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    Journal of metamorphic geology 2 (1984), S. 0 
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    Topics: Geosciences
    Notes: Abstract A major system of steep Caledonian shear zones, of regional extent, has been identified in NE Scotland. The shear zones affect a wide range of lithologies, including Argyll and Southern Highland Group Dalradian, ‘Younger Basic’intrusives and their hornfelses, and also the earlier of the more acid intrusions. The observed fabrics and parageneses are consistent with low-pressure amphibolite facies metamorphism. These shear zones represent a phase of movement which occurred in the 490-465 Ma interval when ambient temperatures were still high, and it is concluded that this is the principal control on the metamorphic grade achieved within the shear zones, although local anomalies may exist.
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    Journal of metamorphic geology 2 (1984), S. 0 
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    Topics: Geosciences
    Notes: Abstract An experimental study of the system CaCO3–MgCO3–FeCO3 was undertaken in order to calibrate the iron correction to the calcite–dolomite geothermometer, which is based on the solubility of magnesium in calcite in the assemblage calcite + dolomite. The experiments, at 450°C and lower temperatures, resulted in products with a very small grain size and incomplete equilibration. However, application of a carefully-devised automatic data processing algorithm to analyses of the phases in experimental charges, combined with a thermodynamic analysis, results in geothermometer diagrams which should be preferred to previous theoretical predictions.
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    Journal of metamorphic geology 2 (1984), S. 0 
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    Topics: Geosciences
    Notes: Abstract Biotite, garnet, staurolite and kyanite isograds in pelitic metasedimentary rocks are developed as a result of thermal metamorphism around syntectonic granitoids in Eastern Rouergue (France). Temperature estimates range between 400°C and 650°C at about 6.5 kbar. Geothermobarometry shows a steep isobaric T gradient which is consistent with the interpretation that the metamorphic highs are thermal aureoles. High grade rocks show evidence of two staurolite forming reactions in the presence of plagioclase and the absence of chlorite that have not been described previously in the literature. The reaction that occurs in the middle staurolite zone, alm-rich ga + Ca-rich pla + Na-rich mu gro-rich ga + Na-rich pla + st + Na-poor mu, is considered to be prograde, whereas the reaction that occurs in the kyanite zone, alm-rich ga + Ca-rich pla + w st + Ca-rich ga + Na-rich pla + qz, is retrograde. The topology of these reactions is illustrated in terms of end member compositions for the systems KNaFASH and KCaFASH, respectively.
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    Journal of metamorphic geology 1 (1983), S. 0 
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    Topics: Geosciences
    Notes: An occurrence of quartz-eclogite is described from the Inner Schieferhülle unit of the Pennine Basement Complex in the SE Tauern Window, Austria.Field relations strongly suggest a pre-Alpine age for the primary eclogitic mineral assemblage (garnet + omphacite + quartz + rutile). This implies that there was no connection between the formation of these eclogites and the late Cretaceous and Tertiary tectonic evolution of the Eastern Alps. The quartz-eclogite mineral assemblage crystallized under conditions of 620 ± 100°C and at pressures in excess of 12 kbar, and suffered amphibolitic overprinting of Alpine and possibly Hercynian age.A four-stage polymetamorphic history is proposed for the Inner Schieferhülle:
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    Journal of metamorphic geology 1 (1983), S. 0 
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    Topics: Geosciences
    Notes: Mafic and ultramafic xenoliths in a basaltic cone at The Anakies in south-eastern Australia are geochemically equivalent to continental basaltic magmas and cumulates. The xenolith microstructures range from recognizably meta-igneous for intrusive rocks to granoblastic for garnet pyroxenites. Contact relationships between different rock types within some xenoliths suggest a complex petrogenesis of multiple intrusive, metamorphic and metasomatic events at the crust/mantle boundary during the evolution of south-eastern Australia. Unaltered spinel lher-zolite, typical of the uppermost eastern Australian mantle, is interleaved with or veined by the metamorphosed intrusive rocks of basaltic composition.Geothermobarometry calculations by a variety of methods show a concordance of equilibration temperatures ranging from 880°C to 980°C and pressures of 12 to 18 kbar (1200-1800 mPa). These physical conditions span the gabbro to granulite to eclogite transition boundaries. The water-vapour pressure during equilibration is estimated to be about 0.5% of the load pressure, using amphibole breakdown data. Large fluid inclusions of pure CO2 are abundant in the mineral phases in the xenoliths, and it is suggested that flux of CO2 from the mantle has been an important heat source and fluid medium during metamorphism of the mafic and ultramafic protoliths at the lower crust/upper mantle boundary.The calculated pressures and temperatures suggest that the south-eastern Australian crust has sustained a high geothermal gradient. In addition, the nature of the mineral assemblages and the contact relationships of granulitic rock with spinel lherzolite, characteristic of mantle material, suggest that the Moho is not a discrete feature in this region, but is represented by a transition zone approximately 20 km thick. These inferences are in agreement with geophysical data (including seismic, heat-flow and electrical resistivity data) determined for south-eastern Australia.Underplating at the crust/mantle boundary by continental basaltic magmas may be an important alternative or additional mechanism to the conventional andesite model for crustal accretion.
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    Journal of metamorphic geology 15 (1997), S. 0 
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    Topics: Geosciences
    Notes: Chert nodules in dolostones in the aureole of the Tertiary Beinn an Dubhaich granite, Skye, have developed mm-scale concentric monomineralic bands of alternating calcite and olivine during breakdown of a diopside core by the reaction 3 Dol+Di=4 Cal+2Fo+2 CO2. A simple textural progression from thin (〈1 cm) homogeneous olivine-calcite rims close to the olivine-in isograd, to total replacement of the diopside core by a ≤10 cm thick well-banded rim close to the carbonate-granite contact demonstrates the developmental stages of the patterning. Correlation of olivine grain size with band spacing, and a greater olivine grain size in banded compared with homogeneous rims support pattern development by post-nucleation geochemical self-organization.
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    Notes: In the Austroalpine Mont Mary nappe (Italian Western Alps) discrete zones of mylonites–ultramylonites developed from coarse-grained, upper amphibolite facies metapelites of pre-Alpine age. The syn–mylonitic mineral assemblage is quartz–biotite–muscovite–plagioclase–garnet–sillimanite–ilmenite–graphite, and formed via the model hydration reaction: Grt1+Kfs+H2O=Bt2+Ilm2+Qtz+Ms± Sil .Grain-size reduction of about three orders of magnitude was accompanied by extensive recrystallization of all minerals except sillimanite, and by compositional changes of garnet and biotite. Deformation took place at temperatures of 510–580 °C under low-pressure conditions (0.25–0.45 GPa) and corresponds to the latest stages of pre-Alpine metamorphic evolution. The pre-Alpine mylonitization conditions were close to the brittle-ductile transition, as indicated by syn–mylonitic generation of pseudotachylytes and high differential stress inferred from quartz grain-size piezometry. The brittle-ductile behaviour at a relatively high temperature, and the absence of annealing textures in quartz aggregates, are suggestive of water-deficient conditions during mylonitization. These were accomplished through progressive consumption of water by syn–kinematic hydration reaction and by adsorption onto the greatly increased grain boundary area resulting from dynamic recrystallization.
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    Journal of metamorphic geology 15 (1997), S. 0 
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    Topics: Geosciences
    Notes: Chemical disequilibrium exists between all phases of the Alpe Arami garnet-peridotite body (Ticino, Switzerland) which hampers the evaluation of P-T conditions of origin, yet disequilibrium offers the inherent possibility to derive a P-T-t path for this mantle slice. We tried to tackle this problem by carrying out new mineral analyses and taking diffusion rates and bulk-rock compositional effects into consideration. Peak metamorphic conditions from mineral core compositions were estimated as 112050C/50.2 GPa. These values are significantly higher than previously published results and were determined from a combination of the O'Neill & Wood (1979) Fe/Mg garnet-olivine exchange thermometer and the Al-in-orthopyroxene barometer (Brey & Köhler, 1990), and are supported by the Ca/Cr ratios in garnet, which are in accord with these conditions. Details of the exhumation path were derived from (1) rim compositions of minerals that yield a first retrograde stage of 720 50C/2 0.25 GPa (2) a spinel lherzolite assemblage in narrow shear zones (tectonic phase F0″, after Möckel, 1969) which documents a second retrograde stage at 500–600C/0.8-l.5 GPa. The Ca content in olivine (Köhler & Brey, 1989) can be used to evaluate further P-T conditions along the retrograde path. We measured very low values (30–40 ppm Ca) in the cores of olivine and a remarkable increase towards the rim (120 ppm). The low core values may reflect an equilibrium stage during the main Alpine metamorphism. The increasing values towards the olivine rims probably represent a late-stage heating event. The initial cooling rates for the peridotite body are between 2700 and 5100C Ma-1, depending on which diffusion data are used.
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    Notes: In the Littleton Formation, garnet porphyroblasts preserve three generations of growth that occurred before formation of the Bolton Syncline. Inclusion trails of foliations overgrown by these porphyroblasts are always truncated by the matrix foliation suggesting that garnet growth predated the matrix foliation. In contrast, many staurolite porphyroblasts grew synchronously with formation of the Bolton Syncline. However, local rim overgrowths of the matrix foliation suggest that some staurolite porphyroblasts continued to grow after development of the fold during younger crenulation producing deformations. The axes of curvature or intersection of foliations defined by inclusion trails inside the garnet porphyroblasts lie oblique to the axial plane of the Bolton Syncline but do not change orientation across it. This suggests the garnets were not rotated during the subsequent deformation associated with fold development or during even younger crenulation events. Three samples also contain a different set of axes defined by curvature of inclusion trails in the cores of garnet porphyroblasts suggesting a protracted history of garnet growth. Foliation intersection axes in staurolite porphyroblasts are consistently orientated close to the trend of the axial plane of the Bolton Syncline on both limbs of the fold. In contrast, axes defined by curvature or intersection of foliations in the rims of staurolite porphyroblasts in two samples exhibit a different trend. This phase of staurolite growth is associated with a crenulation producing deformation that postdated formation of the Bolton Syncline. Measurement of foliation intersection axes defined by inclusion trails in both garnet and staurolite porphyroblasts has enabled the timing of growth relative to one another and to the development of the Bolton Syncline to be distinguished in rocks where other approaches have not been successful. Consistent orientation of foliation intersection axes across a range of younger structures suggests that the porphyroblasts did not rotate relative to geographical coordinates during subsequent ductile deformation. Foliation intersection axes in porphyroblasts are thus useful for correlating phases of porphyroblastic growth in this region.
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  • 78
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    Journal of metamorphic geology 15 (1997), S. 0 
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    Topics: Geosciences
    Notes: Metamorphic field gradients were determined across the entire amphibolite grade Central Alps (c. 50×100 km). P–T  were calculated from 116 samples acquired from our own field work, from samples provided to us by others, and from rocks with mineral compositions described in the literature. Only fluid-conserved equilibria were used to determine P–T . The use of an internally consistent thermodynamic database and mineral solid solution models makes the results robust and reduces relative errors. The results are presented in contour maps. Temperature increases from 500 to 550 °C along the limit of amphibolite grade metamorphism in the north and west, to c. 675 °C toward the south at the Insubric line near the town of Bellinzona. Maximum recorded pressures of c. 7 kbar are in a central region c. 20 km north of the Insubric line, and decrease both to the north (5.5 kbar) and south (4.5 kbar). The P–T  results indicate that there is a relatively large area that reached conditions in the sillimanite stability field but developed neither sillimanite nor fibrolite; this is interpreted as a result of kinetic constraints on nucleation and growth because of the small amounts of thermal overstep (〈40 °C) of the kyanite-sillimanite phase boundary. Comparison of P–T  conditions with carbonate isograds in the region indicate that fluids present during metamorphism were not dominated by a homogeneous external source. Examination of the two-dimensional distribution of pressure and temperature in the context of thermal and tectonic models indicates that two thermal pulses affected the Central Alps during the Tertiary. In the second, heat affected only the southern parts of the area and overprinted the previously established P–T  gradients.
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  • 79
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    Journal of metamorphic geology 15 (1997), S. 0 
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    Topics: Geosciences
    Notes: Pressure–temperature conditions for formation of the peak metamorphic mineral assemblages in phengite-bearing eclogites from Dabieshan have been assessed through a consideration of Fe2+–Mg2+ partitioning between garnet–omphacite and garnet–phengite pairs and of the reaction equilibrium celadonite+pyrope+grossular=muscovite+diopside, which incorporates an evaluation of the extent of the strongly pressure-dependent inverse Tschermak's molecule substitution in the phengites. For the latter equilibrium, the calibration and recommended activity–composition models indicated by Waters & Martin (1993) have been employed and importantly yield results consistent with petrographic evidence for the stability at peak conditions of coesite in certain samples and quartz in others.Confirmation that in some phengite-eclogite samples peak silicate mineral assemblages have equilibrated at confining pressures sufficient for the stability of coesite (and in some cases even diamond) rather negates previous suggestions that coesite may have been stabilized in only very localized, possibly just intracrystalline, domains. Inherent difficulties in the evaluation of peak metamorphic temperatures from Fe2+–Mg2+ partitioning between mineral phases, due to uncertainties over Fe3+/Fe2+ ratios in the minerals (especially omphacites), and to re-equilibration during extensive retrograde overprinting in some samples, are also assessed and discussed.Our results indicate the existence in south-central Dabieshan of phengite eclogites with markedly different equilibration conditions within two structurally distinct tectonometamorphic terranes. Thus our data do not support earlier contentions that south-central Dabieshan comprises a structurally coherent continental-crust terrane with a regional P–T  gradient signalling previous deepest-level subduction in the north. Instead, we recognize the Central Dabie ultra-high-pressure (coesite eclogite-bearing) terrane to be structurally overlain by a Southern Dabie high-pressure (quartz eclogite-bearing) terrane at a major southerly dipping shear zone along which late orogenic extensional collapse appears to have eliminated at least 20 km of crustal section.
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  • 80
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    Journal of metamorphic geology 15 (1997), S. 0 
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    Topics: Geosciences
    Notes: Ar/Ar thermochronology on 24 hornblendes, 3 biotites, 2 muscovites and 2 K-feldspars, collected along a 400 km-long NW-SE geotraverse through the Grenville Province in western Québec, is employed to provide time constraints on the intermediate and low temperature stages of cooling of part of the Grenville orogen. In the Grenville Front zone, the c. 1000 Ma time of exhumation previously established from thermobarometric and isotopic studies, is supported by the hornblende age data presented here. From 60 km to 160 km SE of the Front, reworked Archaean migmatites of the parautochthonous Réservoir Dozois terrane (RDT; 1004 Ma-old metamorphic monazites) contain hornblendes with 972– 950 Ma cooling ages. Assuming metamorphic geotherms between 25 and 30 °C km−1, calculated cooling and unroofing rates are about 6 °C Ma−1 and 0.33 km Ma−1 in the P–T  range 725 °C–800 MPa and 450 °C–400 MPa. Hornblendes from monocyclic rocks of the Mont-Laurier and Morin terranes (MLT and MT; monazite ages c. 1165 Ma) give ages of about 1040 and 1010 Ma, respectively. Calculation of cooling-unroofing rates from peak metamorphic conditions in this area is hampered by thermal perturbations associated with the still poorly dated Grenville collision which took place approximately between 1060 and 1020 Ma. Cooling ages of c. 900 Ma for muscovite and biotite and 860–810 Ma for K-feldspar, show that cooling rates decreased to around 1.5 °C Ma−1 under retrograde greenschist facies conditions in the MLT. On a time vs. distance diagram, the hornblende data define several distinct age ranges, suggesting that each terrane had a characteristic thermal history. Thus, cooling was diachronous and probably non-homogeneous throughout this segment of the Grenville orogen. The time-lag between the cooling history of the parautochthon (972–950 Ma) and the allochthons (1040–1010 Ma) is compatible with an earlier (pre-1040 Ma) peak of metamorphism in the allochthons. The Réservoir Cabonga allochthon was transported toward the NNW from its probable root zone in the MLT during the 1060–1020 Ma Grenvillian collision as a partially cooled slab. The remobilization of the Archaean parautochthon is attributed to this collision. In the Grenville Front zone, slightly older cooling ages and cooling rates initially faster than in the remaining part of the parautochthon are probably as a result of rapid (tectonic?) exhumation shortly after collision. The minor delay (20–30 Ma) in unroofing of the MT compared to the adjacent MLT is most likely related to post-1040 Ma extensional displacement along the Labelle shear zone. In terranes like those described above where metamorphism is diachronous, determination of cooling rates and the history of exhumation may be meaningless without a firm control on the regional structure. However, identification of contrasting cooling histories contributes to unravelling the independent movement of terranes.
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  • 81
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    Journal of metamorphic geology 15 (1997), S. 0 
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    Topics: Geosciences
    Notes: A textural study of marbles from the Beinn an Dubhaich granite contact aureole, Skye, has shown that mass transport by diffusion was probably negligible during the metamorphic event, and that the bulk of the carbonates reacted as a consequence of silica metasomatism, permitting the use of calcsilicates as a tracer for fluid infiltration pathways. Fracture-controlled infiltration was predominant in undeformed marbles, whereas pervasive infiltration occurred during synmetamorphic ductile deformation. Some calcite marbles contain disseminated unoriented calcsilicate minerals that are associated with neither fractures nor a ductile deformation fabric, consistent with an origin via infiltration of fluid along an interconnected grain-edge porosity. The inference of limited pervasive infiltration of undeformed carbonates is consistent with predictions based on experimentally determined fluid–solid dihedral angles.
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  • 82
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    Journal of metamorphic geology 15 (1997), S. 0 
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    Topics: Geosciences
    Notes: Three-dimensional quantitative textural analysis coupled with numerical modelling has been used to assess the dominant mechanisms governing crystallization of garnet porphyroblasts in rocks from diverse regional metamorphic environments. In every case, spatial dispositions, crystal size distributions, and compositional zoning patterns of porphyroblasts indicate the dominance of diffusion-controlled nucleation and growth mechanisms.Nine samples from three geological areas were studied: a suite of semi-pelitic rocks from the Picuris Mountains, New Mexico (USA); a suite of mafic samples from the Llano Uplift, Texas (USA); and a kyanite schist from Mica Dam, British Columbia (Canada). The semi-pelitic suite exhibits post-deformational garnet growth, whereas garnet in the mafic suite and in the kyanite schist grew synkinematically in rocks displaying weak and strong penetrative fabrics, respectively.For each sample, the centres and radii of thousands of garnet crystals were located and measured in three dimensions, using images produced by high-resolution computed X-ray tomography. Statistical measures of the degree of ordering and clustering of nucleation sites, and estimates of crystal isolation for each porphyroblast, were then computed from the measured spatial dispositions. These measures can be reproduced in simple numerical models only by diffusion-controlled nucleation and growth mechanisms. Normalized radius-rate relations computed from compositional zoning patterns in the garnets require thermally accelerated diffusion-controlled growth, providing independent confirmation of the conclusions based on textural analysis. The unexpected similarity of results from all samples indicates that diffusion-controlled nucleation and growth mechanisms may govern porphyroblast crystallization in many metamorphic regimes.
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  • 83
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    Journal of metamorphic geology 15 (1997), S. 0 
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    Topics: Geosciences
    Notes: The proposed retrograde orthoamphibole isograd in the Southern Marginal Zone of the Limpopo Belt separates hydrated, amphibolite grade metapelites from their granulite grade precursors and provides an intriguing geological dilemma. Widespread rehydration of metapelitic granulites under conditions of 660–600 °C and ≥0.6 GPa, and CO2-dominated fluid-inclusion populations appear to suggest thorough flushing of the high-grade crust with an externally derived carbonic fluid. However, past studies of the carbon and oxygen isotope geochemistry of the hydrated rocks have not demonstrated the involvement of any voluminous out of equilibrium’ fluid in the evolution of the rocks. This contribution proposes a model wherein the hydrating fluids are derived from crystallizing anatectic leucosomes, generated by in situ fluid-absent biotite melting along the prograde path. Model equilibrium fluid compositions suggest that reaction between this melt-derived H2O and biogenic graphite produced CO2-rich fluid compositions and potentially high fluid:rock ratios at the wet granite solidus. Declining temperature resulted in fluid compositions shifting to higher XH2O, with the precipitation of graphite essentially at the sites of initial fluid generation, thereby preserving original (pre-metamorphic) isotopic heterogeneities. The hydration pattern of the Southern Marginal Zone appears to be a function of melt migration. In the hydrated zone, leucosomes generally approximate minimum melt compositions and in this zone H2O was effectively recycled between the prograde and retrograde assemblages. In contrast, leucosomes in the granulite grade portion of the terrane have lost a K2O- and H2O-rich melt fraction, and although some hydration has occurred in this zone, orthopyroxene is generally preserved in metapelites. In a general context, in situ crystallization of graphitic partially melted source rocks has the potential to produce high fluid-rock ratios at temperatures close to the wet granite solidus. This single process holds the potential for widespread retrogression of formerly high-grade assemblages, at a variety of aH2O values, without external fluid input.
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    Journal of metamorphic geology 15 (1997), S. 0 
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    Topics: Geosciences
    Notes: A spatial association is observed between the size distribution of garnet porphyroblasts and the size distribution of quartz veins in greenschist facies metapelites from Troms, North Norway. The size distribution of quartz veins reflects the flow regime of metamorphic fluids. The hypothesis that the flow regime of metamorphic fluids is also responsible for the size distribution of garnet crystals was tested by ascribing empirical acceleration parameters to the nucleation and growth rates of garnet crystals.In regions where fluid flow was interpreted as pervasive’, acceleration parameters for nucleation were high, whereas in regions where fluid flow was interpreted as channelled’, acceleration parameters for growth were high. Accelerated crystal growth is further implied from the chemical zoning and crystal morphologies of garnets collected near discrete veins.This spatial association may imply that fluid flow can be instrumental in controlling garnet crystallization. Fluid flow could affect garnet crystallization kinetics by facilitating thermal advection and/or mass transfer. In the study area, rhodochrosite (MnCO3) veins provide evidence for mass transfer of Mn by fluid flow. An influx of Mn would expand the stability field of garnet to lower temperatures. The resulting thermal overstep could accelerate nucleation and/or growth of garnets.The corollary of this study is that size distributions and chemical zoning of garnets, or other porphyroblast phases, can be used to study metamorphic fluid flow.
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    Journal of metamorphic geology 2 (1984), S. 0 
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    Topics: Geosciences
    Notes: The occurrence of lawsonite is described from pelitic schists of the lower-grade part of the pumpellyite-bearing subzone of the chlorite zone in the Asemi River area of central Shikoku. The lawsonite-bearing parageneses are consistent with the generally accepted view that the Sanbagawa facies series represents higher pressures than the lawsonite-bearing facies series in New Zealand.
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    Journal of metamorphic geology 2 (1984), S. 0 
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    Notes: Abstract Late Archaean orthogneisses and aluminous and iron-rich metasedimentary rocks intruded by anorthosite and a ferrodiorite-granite suite were completely recrystallized during Proterozoic granulite facies metamorphism. Geobarometry and geothermometry indicate P-T conditions of around 7.5kbar. 700°C, with a CO2-rich fluid phase and logfO2 at or below -16. A two-stage high-grade history of near isochemical corona growth is preserved in metasediments with the reaction cycle opx + plag + H2O → hbl+gar+SiO2→ opx+plag+H2O. End product compositions resemble those of the initial phases, and the only mobile components were SiO2 and/or H2O. The coronas reflect shortlived fluctuations in chemical activity at essentially constant P and T, contrary to simple progressive change in equilibrium parameters recorded by most corona-bearing textures.
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  • 87
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    Journal of metamorphic geology 2 (1984), S. 0 
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    Topics: Geosciences
    Notes: In a polymetamorphic, felsic, biotite-bearing gneiss, biotite has reacted to form magnetite and microcline. The resulting structure is a magnetite core surrounded by a mantle of feldspar and quartz normally not exceeding 20mm in diameter. Measurements of oxygen isotope ratios disclose disequilibrium between mantle microcline and mantle quartz and also between mantle and matrix minerals of the same species. A clustering of temperature estimates from the oxygen isotope distribution between magnetite and quartz and between magnetite and microcline in the interval 550 to 600°C suggests an approach to oxygen isotope equilibrium. No signs of a re-equilibriation of the reacting biotite can be found.
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    Journal of metamorphic geology 2 (1984), S. 0 
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    Topics: Geosciences
    Notes: Abstract Clinopyroxenes and garnets from 11 blueschist-facies Fe-rich eclogite samples from the Voltri Group show a wide range of chemical compositions. Detailed analyses of single pyroxene and garnet grains show wide and scattered chemical inhomogeneity, the KD(KD= (Fe2+/Mg)Gt/(Fe2+/Mg)Cpx) ranges from 20 to 87 based on rim analyses only. The data obtained indicate that the mineral pairs never attained equilibrium under uniform P-T conditions and that the compositions of the metamorphic minerals were influenced mainly by the composition of the pre-metamorphic minerals and by topotactical reactions.
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  • 89
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    Journal of metamorphic geology 2 (1984), S. 0 
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    Journal of metamorphic geology 2 (1984), S. 0 
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    Topics: Geosciences
    Notes: Abstract At Sulitjelma, Norway, there is a major inversion of metamorphic isograds beneath an inverted but undisrupted ophiolite. The flysch-like Furulund schist in which the inverted isograds occur is also inverted and the early folds in it are downward facing. The isograds cut across the axial surfaces of early folds and across the schistosity. These relationships are explained as the consequence of metamorphism during the progressive development of a large overfold. The inverted limb of the overfold is regarded as a major, thick, gently-dipping shear zone, separating the lower-grade, lower part of the Caledonian allochthon below from the higher-grade upper part of the allochthon above. The association between stratigraphical inversion, downward-facing of syn-schistosity folds and metamorphic inversion is explained by the progressive development of the shear zone. It is suggested that the presence of such shear zones is a common feature of orogenic belts formed by continental collision.
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  • 91
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    Journal of metamorphic geology 2 (1984), S. 0 
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    Topics: Geosciences
    Notes: Abstract The Hercynian granitic basement which forms the Tenda Massif in NE Corsica represents part of the leading edge of the European Plate during middle-to-late Cretaceous (Eoalpine) high P metamorphism. The metamorphism of this basement, induced by the overthrusting of a blueschist facies (schistes lustrés) nappe, was confined to a major ductile shear zone (c. 1000m thick) within which deformation increases upwards towards the overlying nappe. Metamorphism within the basement mostly records lower blueschist facies conditions (crossite + epidote) except near the base of the shear zone where the greenschist facies assemblage albite + actinolitic amphibole has developed instead of crossite. Study of the primary mafic phase breakdown reactions within hornblende granodiorite reveals the following metamorphic zonation. Zone 1: biotite to chlorite. Towards zone 2: biotite to phengite. Zone 2: Hornblende to actinolitic Ca-amphibole + albite + sphene, and biotite to actinolitic Ca-amphibole + albite + phengite + Ti-ore + epidote. Zone 3: Hornblende to crossite + low Ti-biotite + phengite + sphene, and biotite to crossite + low Ti-biotite + phengite + Ti-ore + sphene ± epidote. P-T conditions at the base of the shear zone are estimated to have been 390-490°C at 600-900 M Pa (6-9kbar) and the Corsican basement is therefore deduced to have been buried to 20-30 km during metamorphism. This relatively shallow metamorphism contrasts with some other areas in the Western Alps where the Eoalpine event apparently buried the European continental crust to depths of 80 km or more. As there is no evidence for a long history of blueschist facies metamorphism prior to the involvement of the European continent, it is deduced that the Eoalpine blueschists were produced during the collision of the Insubric plate with Europe, rather than during Tethyan intraoceanic subduction. Coherent blueschist terrains such as the schistes lustres probably record buovant feature collision and obduction tectonics rather than any preceding oceanic subduction.
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    Journal of metamorphic geology 2 (1984), S. 0 
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    Notes: Abstract Three major blastomylonitic synmetamorphic (epidote amphibolite to mid amphibolite facies) shear zones are seen on the NW coast of the Mullet Peninsula in NW Mayo. These shear zones occur at the contacts of major structural units and in an imbricated slice where rocks of the Erris Complex are deformed and chemically modified. Chemical changes associated with individual shear zones have been deduced by comparing the compositions of various gneisses both within and adjacent to the shear zones. Compositional changes are different in the constituent rock-types within each unit and many elements normally considered immobile have been selectively mobilized within the shear zones. Little evidence of wholesale metasomatic introduction of components into these shear zones was found to accompany the selective mobilization.
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  • 93
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    Journal of metamorphic geology 1 (1983), S. 0 
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    Notes: Abstract. In the Kamuikotan zone, central Hokkaido, Japan, two distinct types of metamorphic rocks are tectonically mixed up, along with a great quantity of ultramafic rocks; one type consists of high-pressure metamorphic rocks, and the other of low-pressure ones. The high-pressure metamorphic rocks are divided into two categories. (1) Prograde greenschist to glaucophaneschist facies rocks derived from mudstone, sandstone, limestone, a variety of basic rocks such as pillow and massive lavas, hyaloclastite and tuff, and radiolarian (Valanginian to Hauterivian) chert, among which the basic rocks and the chert, and occasionally the sandstone, occur as incoherent blocks (or inclusions) enveloped by mudstone. (2) Retrograde amphibolites with minor metachert and glaucophane-calcite rock, which are tectonic (or exotic) blocks enclosed within prograde mudstone or serpentinite, or separated from these prograde rocks by faults. The K-Ar ages of the prograde metamorphic rocks (72, 107 and 116 Ma on phengitic muscovites) are younger than those of the retrograde rocks (109, 132, 135 and 145 Ma on muscovites, and 120 Ma on hornblende). The low-pressure metamorphic rocks consist of the mafic members of an ophiolite sequence with a capping of radiolarian (Tithonian) chert with the metamorphic grade ranging from the zeolite facies, through the greenschist (partly, actinolite-calcic plagioclase) facies to the amphibolite (partly, hornblende-granulite) facies. The low-pressure metamorphism has a number of similarities with that described for‘ocean-floor’metamorphism. The tectonic evolution of such a mixed-up zone is discussed in relation to Mesozoic plate motion.
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    Journal of metamorphic geology 1 (1983), S. 0 
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    Topics: Geosciences
    Notes: The rocks of the Scourian Complex have been intensively studied, but there is still no consensus as to the conditions of the granulite-facies metamorphism preserved in these rocks. Recent estimates of these conditions fall into two groups, one at 820-920°C and ca. 11 kbar and the second at ca. 1000°C and 〉12 kbar. Investigation of a variety of rocks shows that the recorded conditions vary with grain-size, with higher-grade conditions recorded by the cores of coarser (ca. 10 mm) crystals, and lower-grade conditions recorded by the rims of coarser grains and by finer grains. This observation suggests that re-equilibration during recovery of these rocks to the surface has been important which may account for the discrepancy in estimated P-T conditions. Revised estimates of the equilibration conditions of the Scourian Complex of T 〉 1000°C and P 〉 8.5 kbar are presented. The conditions suggested for the peak of metamorphism mean that the role of anatexis in the genesis of these rocks must be considered and the nature of the fluid phase thoroughly investigated.
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    Journal of metamorphic geology 1 (1983), S. 0 
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    Notes: Abstract. Plagioclase porphyroblasts from silvergrey schists belonging to the Nevado Filabride Complex in the Sierra Alhamilla (Betic Zone, SE Spain) are interpreted as having been formed preand synkinematically with respect to the second phase of deformation. Different types of inclusion patterns represent 'snap-shots’(high growth-rate/strain-rate ratio features) of the formation of a diffentiated crenulation cleavage during this second phase of deformation, by the processes of kinking, crenulation and associated differentiation.Regional considerations indicate an Alpine age for this tectono-metamorphic event, which can be explained by the‘hot emplacement’of the higher Nevado Filabride units. The observed structural evolution is not consistent with a pre-Alpine polyphase deformation history.
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    Journal of metamorphic geology 1 (1983), S. 0 
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    Topics: Geosciences
    Notes: Evidence from rock microstructures, mass transfer and isotopic exchange indicates that substantial quantities of aqueous fluids are involved in low- and medium-grade regional metamorphism. Similar conclusions are drawn from many retrograde environments, whereas high-grade metamorphic fluids may be melt dominated. The mobile fluids play essential roles in metamorphic reactions, mass transport and deformation processes. These processes are linked by the mechanical consequences of metamorphic fluid pressures (Pf) generally being greater than or equal to the minimum principal compressive stress. Under such conditions metamorphic porosity comprises grain boundary tubules and bubbles together with continuously generated (and healed) microfractures. Deformation results in significant interconnected porosity and hence enhanced permeability. Lithologically and structurally controlled permeability variations may cause effective fluid channelling.Simple Rayleigh-Darcy modelling of a uniformly permeable, crustal slab shows that convective instability of metamorphic fluid is expected at the permeabilities suggested for the high Pf metamorphic conditions. Complex, large-scale convective cells operating in overpressured, but capped systems may provide a satisfactory explanation for the large fluid/rock ratios and extensive mass transport demonstrated for many low- and medium-grade metamorphic environments. Such large-scale fluid circulation may have important consequences for heat transfer in and the thermal evolution of metamorphic belts.
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    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Hydrothermal synthesis of Fe-pum-pellyites was conducted using high pressure cold-seal apparatus and solid oxygen buffering techniques at temperatures between 250°C and 550°C and 2.0–9.1 kbar Pfluid. Fe-pumpellyites were synthesized from partially crystalline gel mixtures of compositions: 4CaO - 2.1Al2O3_1.5FeO - 0.3MgO - 6SiO2 (II) and 3CaO - 1.5 Al2O3 - 2.7FeO - 0.3MgO - 6SiO2 (III) in the presence of excess H2O at Pfluid of 5–9.1 Kbar, temperatures between 275°C and 325°C, and fO2 defined by the QFM and HM buffers; for both of these compositions (II and III), the condensed synthetic run products included minor 7Å chlorite ± garnet ± Fe-oxide. The cell dimensions and aggregate refractive index (a= 19.13(2)Å, b= 5.940(4)Å, c= 8.847(5)Å, ±= 97.37(6)±, and n= 1.702(2)) of the pum-pellyite synthesized from the bulk composition II mix are compatible with those of natural pumpellyites containing similar total Fe contents. Attempts at synthesizing Fe-pumpellyites from a Mg-free bulk composition were not successful; these results are consistent with the total absence of natural Mg-free pumpellyites.The higher temperature, higher oxygen fugacity assemblages of the equivalent bulk compositions (II and III) consist of epidote ± minor amounts of chlorite, garnet, quartz, hematite, and magnetite. The results of these synthesis experiments accord with the mineral parageneses observed in low-grade metabasites which imply that Fe-pumpellyites are replaced by epidote with increasing temperature and/or fO2 and that Fe3+ is preferentially partitioned into epidote with respect to coexisting pum-pellyite. In addition, these synthesis experiments indicate that Fe-bearing pumpellyites crystallize at and are stable to lower temperatures than more aluminous pumpellyites—a result also consistent with natural systems.
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  • 98
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: A ternary solid solution model for omphacite with the end-members jadeite (NaAlSi2O6), diopside (CaMgSi2O6) and hedenbergite (CaFeSi2O6) was derived from experimental data from the literature. The subregular solution model, fitted by linear programming, is best suited to omphacites with very little aegirine component in common eclogites. Applying this solution model to the calculation of equilibrium phase diagrams of eclogites from the Adula nappe (Central Alps, Switzerland) results in large stability fields for common eclogite assemblages (garnet+omphacite+quartz+H2O±kyanite). Within this field the compositions of garnet and omphacite show very little variation. A precise determination of the peak-pressure and temperature is not possible. The occurrence of amphibole, overgrowing the peak-pressure assemblage in fresh eclogite, suggests retrograde re-equilibration, still under eclogite facies conditions. The computation of isopleths for garnet and pyroxene end-members allows the estimation of the pressure and temperature conditions of this re-equilibration event (19–21 kbar, c. 700 °C).
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  • 99
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd.
    Journal of metamorphic geology 15 (1997), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Quantitative thermobarometry in pelites and garnet amphibolites from the Bitterroot metamorphic core complex, combined with U–Pb dating of metamorphic monazite and zircon from footwall rocks, provide new constraints on the P–T –t evolution of footwall rocks. The thermobarometric and geochronological results, when correlated with observations from other regions bordering the Bitterroot batholith, define a regional metamorphic history for the northern margin of the Bitterroot batholith consisting of three distinct events beginning with early prograde metamorphism (M1) coincident with arc-related magmatism and crustal shortening at c. 100–80 Ma. Magmatism and crustal thickening led to regional upper-amphibolite facies metamorphism (M2) and anatectic melting between 64 and 56 Ma. Mineral textures related to high-temperature isothermal decompression (M3), coincident with late stages of magmatism in the Bitterroot complex footwall (56–48 Ma), are only preserved in areas adjacent to extensional structures. The close temporal relationship between peak metamorphism and the onset of footwall decompression indicates that thermal weakening was an important factor in the initiation of Early Eocene regional extension and tectonic denudation of the Bitterroot complex and possibly the Boehls Butte metamorphic terrane. The morphology of the decompressional P–T –t path derived for Bitterroot footwall rocks is similar to other trajectories reported for Cordilleran core complexes and may represent a transition in the deformational style of core-bunding detachments responsible for exhumation.
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  • 100
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd.
    Journal of metamorphic geology 15 (1997), S. 0 
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Garnet–orthopyroxene geothermometry and geobarometry are widely used in high-grade metamorphic terranes. These techniques may provide an insight into pressure–temperature (P–T ) paths followed by such terranes, provided various sources of uncertainty are taken into consideration. Analytical uncertainties, particularly with regard to their effect on ferric iron estimation in orthopyroxene, can contribute to the overall uncertainty on the calculated P–T . Additionally, retrograde cation diffusion can affect the Fe–Mg distribution between coexisting garnet and orthopyroxene, consequently affecting P–T  estimates. Recognizing the importance of these effects, and care with both the choice of the grains analysed and analytical techniques, may lead to more reliable P–T  estimation.
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