ALBERT

Description / Table of Contents: INTRODUCTION The evaporite deposits of the Werra district, especially in the Hattorf mining field, are considered a worldwide unique location for the occurence of numerous basalt dikes and magmatic fluid phases fixed in salt rocks. In spite of the great number of studies dealing with the magmatites in the Werra region, previous investigations have rarely attempted more than a predominantly 'qualitative' description of the basaltic rocks and the effects of volcanism on the evaporites (see Chapter 2). The method of interpreting the mineralogical and chemical composition of the evaporites at the basalt contact is based on previous works (KNIPPING 1984; KNIPPING & HERRMANN 1985). This study should contribute to understanding (i) the mechanism of intrusion of the basaltic rnelts and (ii) the metamorphic processes occurring in the evaporites caused by mobile phases during volcanism. Hence, the following methods were applied: The mineralogical and chemical description of the basaltic rocks with recent nomenclature including the possible differences between individual dikes and between surface- and subsurface-exposed basalts. Seven surface and 48 subsurface exposures at the Hattorf mine of Kali & Salz AG were studied. Application of the most recent knowledge on basalt genesis for interpreting observational and experimental results. Studies on the sulfur and carbon isotope distributions of the native sulfur from several subsurface exposures and the enrichments of gases (predominantly CO2) in the evaporites. Calculation of the spatial and temporal temperature distribution in the evaporite rocks following intrusion of the basaltic melts. For purposes of clarity a few of the terms which will be used frequently here will first be defined: basalt - all of the intrusive rocks studied can be assigned mineralogically and chemically to the basalt family in a broader sense. Thus, the terms basaltic rock or, in short, basalt will be used for these rocks. rock salt - instead of the term salt for halitic rocks the term rock salt is used. Besides, the evaporites are generally designated as host rocks (for the basalt dikes) as well. gases - especially in the German literature the term carbon dioxide or carbonic acid (= Kohlensäure) is frequently used for the gases enclosed in the evaporites of the Werra-Fulda district. ACKERMANN et al (1964) found, in addition to carbon dioxide, considerable amounts of nitrogen and minor amounts of methane. In the following therefore the terms gas mixture or gas will be used. The various basalt dikes found in the Hattorf mining field are described here in terms of their mineralogy and geochemistry for the first time. In doing so it is necessary to number them from east to west. To avoid confusion with older numerations (e.g. SIEMENS 1971) the various dike systems are designated by capital letters (A to P).

Description / Table of Contents: PREFACE Our planet is evolving and changing; its surface is capable of unleashing great violence as its crust is created and destroyed. Quite remarkably, it has been only recently that the fundamental elements of this evolution were fully appreciated, and only within the last decade have there been technologies capable of directly meastLring the global motions of the Earth's crust which are one of the most visible manifestations of these processes. Before the advent of space technologies, the nature of contemporary global plate motions went largely unobserved. These motions were understood from the geological records, and plate rates for million year averages were established_ Fortunately, the revolution in geophysics brought about by the general acceptance of plate tectonic theory has been paralleled by significant advances in space geodesy oceanography and geophysics. New space technologies have rapidly matured, yielding new insights and capabilities for more completely understanding the dynamical properties of the Earth, its oceans and atmosphere. Likewise, the evolving earth sciences capabilities from space are fostering new questions and goals made possible through the creative exploitation of satellite missions. A workshop entitled "The Interdisciplinary Role of Space Geodesy" was held in Erice, Italy, on the island of Sicily on July 23-29, 1988, to discuss the directions and challenges of space geodeys for the decades to come. This international gathering was made possible by the E. Majorana Centre for Scientific Culture int he framework of tis International School of Geodesy. The workshop was sponsored by the Italian Ministry of education, the Italian Ministry of Scientific and Technological Research, the Sicilian Regional Government, the Italian National Institute of Geophysics, and the National Aeronautics and Space Administration of the United States. This volume is the result of the dedicated effort undertaken by an international group of scientists and administrators who have contemplated the challenge of the future of space-based earth science for the next decade. Recognizing the need for defining new milestones both in science and technology, they have developed a detailed report of what could be achieved and what challenges remain after twenty fertile years of space exploration...

Description / Table of Contents: PREFACE In a densily populated industrialized country, waste disposal must be compatible with the requirements of the environment. This is one of the indispensable requirements to guarantee an effective protection of the environment. In the past years the waste disposal industry has been given increasing attention by the general public as well as the authorities. This confirms the necessity of adapting the quality of waste disposal to the technological standard of the production. While in the past, waste disposal performance was more or less evaluated in terms of short-term costs, there is at present a reorientation in the direction of a science-based waste disposal industry. These new tendencies are taking into account ecological factors as well as the long-term consequences - i.e., for decades and centuries to come - of waste disposal methods. In this light, particular attention is given to the depositing of residues whose utilization does not appear meaningful from an ecological point of view, or would require disproportionate ressources. It is an important concern of the Federal Authorities to encourage the rapid materialization of disposal solutions which can function as ultimate deposits, and which will therefore cause neither water pollution nor gaseous emissions. In view of this goal it is necessary to establish criteria and regulations for the wastes to be deposited as well as for the characteristics of the deposits. This field confronts science with an urgent but rewarding challenge and calls for close collaboration between many different specialized disciplines...

Description / Table of Contents: This book is the collection of the Lecture Notes of an International Summer School of Theoretical Geodesy held in Assisi (Italy) from May 23 to June 3 -1988.

Description / Table of Contents: Chapter 1: SEDIMENTARY PROCESSES --- Architectural Elements and Bounding Surfaces in Channelized Clastic Deposits: Notes on Comparisons between Fluvial and Turbidite Systems / A. D. MIALL / pp. 3-15 --- A Simulation of Basin Margin Sedimentation to Infer Geometry and Lithofacies—A Carbonate Example— / K. NAKAYAMA and C. G. St. C. KENDALL / pp. 17-31 --- Gravel Fabric of Clast-Supported Resedimented Conglomerate / K. YAGISHITA / pp. 33-42 --- Magnetic Fabrics and Depositional Processes / A. TAIRA / pp. 43-77 --- Chapter 2: FLUVIAL TO COASTAL FACIES --- Sedimentation in Coarse-Grained Sand-Bedded Meanders: Distinctive Deposition of Suspended Sediment / F. ISEYA and H. IKEDA / pp. 81-112 --- Mechanism of Inverse Grading of Suspended Load Deposits / F. ISEYA / pp. 113-129 --- Coastal Eolian Dune Deposits of the Pleistocene Shimosa Group in Chiba, Japan / H. NAKAZATO, H. SATO, and F. MASUDA / pp. 131-141 --- Synsedimentary Conjugate Faults in the Pleistocene Tidal Deposits at Ushibori, Ibaraki, Japan / H. AONO and F. MASUDA / pp. 143-149 --- Description and Genesis of Tidal Bedding in the Cobequid Bay-Salmon River Estuary, Bay of Fundy, Canada / R. W. DALRYMPLE and Y. MAKINO / pp. 151-177 --- Petrofacies of Paleo-Tokyo Bay Sands, the Upper Pleistocene of Central Honshu, Japan / M.ITO and F.MASUDA / pp. 179-196 --- Faunal Condensation in Early Phases of Glacio-Eustatic Sea-Level Rise, Found in the Middle to Late Pleistocene Shimosa Group, Boso Peninsula, Central Japan / Y. KONDO / pp. 197-212 --- Chapter 3: SHALLOW MARINE FACIES --- Sedimentology and History of Sea Level Changes in the East China Sea and Adjacent Seas / B.-C. SUK / pp. 215-231 --- Sediments and Sedimentary Processes in the Yellow and East China Seas / J. D. MILLIMAN, Y. S. QIN, and Y. A. PARK / pp. 233-249 --- Bedforms and Their Migration Patterns in the Southern Bungo Strait, Japan / K. IKEHARA and Y. KIN05HITA / pp. 251-260 --- The Kuroshio-Generated Bedform System in the Osumi Strait, Southern Kyushu, Japan / K. IKEHARA / pp. 261-273 --- Ocean Current-Controlled Sedimentary Facies of the Pleistocene Ichijiku Formation, Kazusa Group, Boso Peninsula, Japan / N. NAKAYAMA and F. MASUDA / pp. 275-293 --- Multi-Layered Progradational Sequences in the Shelf and Shelf Slope of the Southwest Japan Forearc / Y. OKAMURA / pp. 295-318 --- Storm-Built Sand Ridges on the Inner Shelf of Kashima-Nada, Northeast Japan / Y. SAITO / pp. 319-330 --- Storm Deposits in the Inner Shelf and Their Recurrence Intervals, Sendai Bay, Northeast Japan / Modern Y. SAITO / pp. 331-344 --- Sea-Level Controlled Shallow-Marine Systems in the Plio-Pleistocene Kakegawa Group, Shizuoka, Central Honshu, Japan: Comparison of Transgressive and Regressive Phases / M. ISHIBASHI / pp. 345-363 --- Coarse Clastic Sedimentation in the Triassic Offshore Sequence of the South- eastern Kitakami Mountains, Japan / K. KAMADA / pp. 365-375 --- Depositional Facies of the Viséan (Carboniferous) Limestones in the South Kitakami Terrane, Northeast Japan / T. KAWAMURA / pp. 377-391 --- Chapter 4: SLOPE TO DEEP-WATER FACIES --- Depositional Scheme of Neogene Bedded Siliceous Rocks in an Active Upwelling Area-On the Wakkanai Formation, Northern Hokkaido, Japan / H. FUKUSAWA / pp. 395-419 --- Turbidites and Related Clastic Systems in the Tertiary Chichibu Basin, Central Japan / K. M. LATT / pp. 421-438 --- Two Stages of Submarine Fan Sedimentation in an Ancient Forearc Basin, Central Japan / S. TOKUHASHI / pp. 439-468 --- Synsedimentary Folding of a Sandstone Layer: Paleoslope Deduced from the Folding Process / M. FUSEYA / pp. 469-481 --- Miocene Offshore Tractive Current-Worked Conglomerates—Tsubutegaura, Chita Peninsula, Central Japan— / T. YAMAZAKI, M. YAMAOKA, and T. SHIKI / pp. 483-494 --- Coarse Clast Dominant Submarine Debrite, the Mio-Pliocene Fujikawa Group, Central Japan / W. SOH / pp. 495-510 --- Basal Structures of the Pleistocene Chikura Submarine Sliding Sheet in the Southernmost Boso Peninsula, Central Japan / T. ITO and S. SUGIYAMA / pp. 511-528 --- Topography and Sedimentary Facies of the Nankai Deep Sea Channel / K. SHIMAMURA / pp. 529-556 --- Ancient Trench-Fill and Trench-Slope Basin Deposits: An Example from the Permian Nishiki Group, Southwest Japan / A. HARA and K. KIMINAMI / pp. 557-575 --- Tectono-Sedimentary Settings of Seep Biological Communities—A Synthesis from the Japanese Subduction Zones— / K. FUJIOKA and A. TAIRA / pp. 577-602 --- Chapter 5: VOLCANIC FACIES --- Sedimentary Facies of the Mio-Pliocene Volcanotectonic Depressions along the Volcanic Front in Northeast Honshu, Japan / M. UTADA and T. ITO / pp. 605-618 --- Submarine Depositional Processes for Volcaniclastic Sediments in the Mio- Pliocene Misaki Formation, Miura Group, Central Japan / W. SOH, A. TAIRA, Y. OGAWA, H. TANIGUCHI, K. T. PICKERING, and D. A. V. STOW / pp. 619-630 --- Chapter 6: TECTONICS AND SEDIMENTATION --- Upper Cretaceous-Paleogene Kuji Basin of Northeast Japan: Tectonic Controls on Strike-Slip Basin Sedimentation / K. MINOURA and H. YAMAUCHI / pp. 633-658 --- The Itsukaichimachi Group: A Middle Miocene Strike-Slip Basin-Fill in the Southeastern Margin of the Kanto Mountains, Central Honshu, Japan / M. ITO / pp. 659-673 --- Structural Control on Sedimentation of Coal-Bearing Formations in Japan / K. FUJII / pp. 675-688 --- Coarse-Grained Turbidite Sedimentation Resulting from the Miocene Collision Event in Central Hokkaido, Japan / K. HOYANAGI / pp. 689-709 --- Eocene Foreland Thrust-Fold Belt of the Central Ryukyu Island Arc: Deduced from Sedimentary Structures in the Kayo Formation / H. UJIIE / pp. 711-722 --- Rifting of the Gondwanaland and Uplifting of the Himalayas Recorded in Mesozoic and Tertiary Fluvial Sediments in the Nepal Himalayas / H. SAKAI / pp. 723-732

Description / Table of Contents: J.S. Daly, R.A. Cliff, and B.W.D. Yardley: Preface / Geological Society, London, Special Publications, 43:vii-viii, doi:10.1144/GSL.SP.1989.043.01.01 --- E. J. Essene: The current status of thermobarometry in metamorphic rocks / Geological Society, London, Special Publications, 43:1-44, doi:10.1144/GSL.SP.1989.043.01.02 --- L. Ya. Aranovich and K. K. Podlesskii: Geothermobarometry of high-grade metapelites: simultaneously operating reactions / Geological Society, London, Special Publications, 43:45-61, doi:10.1144/GSL.SP.1989.043.01.03 --- Frank S. Spear: Relative thermobarometry and metamorphic P-T, paths / Geological Society, London, Special Publications, 43:63-81, doi:10.1144/GSL.SP.1989.043.01.04 --- R. H. Vernon: Porphyroblast-matrix microstructural relationships: recent approaches and problems / Geological Society, London, Special Publications, 43:83-102, doi:10.1144/GSL.SP.1989.043.01.05 --- John Ridley: Vertical movement in orogenic belts and the timing of metamorphism relative to deformation / Geological Society, London, Special Publications, 43:103-115, doi:10.1144/GSL.SP.1989.043.01.06 --- R. A. Jamieson and C. Beaumont: Deformation and metamorphism in convergent orogens: a model for uplift and exhumation of metamorphic terrains / Geological Society, London, Special Publications, 43:117-129, doi:10.1144/GSL.SP.1989.043.01.07 --- Peter K. Zeitler: The geochronology of metamorphic processes / Geological Society, London, Special Publications, 43:131-147, doi:10.1144/GSL.SP.1989.043.01.08 --- James J. Irwin, Charles Kirschbaum, Tek. H. Lim, Derek Powell, and William E. Glassley: A laser-microprobe study of argon isotopes in deformed pegmatites from the Northern Highlands of Scotland / Geological Society, London, Special Publications, 43:149-160, doi:10.1144/GSL.SP.1989.043.01.09 --- A. Reuter and R. D. Dallmeyer: K-Ar and 40Ar/39Ar dating of cleavage formed during very low-grade metamorphism: a review / Geological Society, London, Special Publications, 43:161-171, doi:10.1144/GSL.SP.1989.043.01.10 --- Hanan J. Kisch: Discordant relationship between degree of very low-grade metamorphism and the development of slaty cleavage / Geological Society, London, Special Publications, 43:173-185, doi:10.1144/GSL.SP.1989.043.01.11 --- J. J. De Yoreo, D. R. Lux, and C. V. Guidotti: The role of crustal anatexis and magma migration in the thermal evolution of regions of thickened continental crust / Geological Society, London, Special Publications, 43:187-202, doi:10.1144/GSL.SP.1989.043.01.12 --- C. P. Chamberlain and Douglas Rumble III: The influence of fluids on the thermal history of a metamorphic terrain: New Hampshire, USA / Geological Society, London, Special Publications, 43:203-213, doi:10.1144/GSL.SP.1989.043.01.13 --- Howard W. Day and C. Page Chamberlain: Implications of thermal and baric structure for controls on metamorphism: northern New England, USA / Geological Society, London, Special Publications, 43:215-222, doi:10.1144/GSL.SP.1989.043.01.14 --- L. Aguirre, B. Levi, and J. O. Nyström: The link between metamorphism, volcanism and geotectonic setting during the evolution of the Andes / Geological Society, London, Special Publications, 43:223-232, doi:10.1144/GSL.SP.1989.043.01.15 --- T. M. Gordon: Thermal evolution of the Kisseynew sedimentary gneiss belt, Manitoba: metamorphism at an early Proterozoic accretionary margin / Geological Society, London, Special Publications, 43:233-243, doi:10.1144/GSL.SP.1989.043.01.16 --- Peter H. Thompson: An empirical model for metamorphic evolution of the Archaean Slave Province and adjacent Thelon Tectonic Zone, north-western Canadian Shield / Geological Society, London, Special Publications, 43:245-263, doi:10.1144/GSL.SP.1989.043.01.17 --- Amalbikash Mukherjee: P-T-time history and thermal modelling of an anorthosite-granulite interface, Eastern Ghats metamorphic belt, India / Geological Society, London, Special Publications, 43:265-274, doi:10.1144/GSL.SP.1989.043.01.18 --- Leonid L. Perchuk: P-T-fluid regimes of metamorphism and related magmatism with specific reference to the granulite-facies Sharyzhalgay complex of Lake Baikal / Geological Society, London, Special Publications, 43:275-291, doi:10.1144/GSL.SP.1989.043.01.19 --- D. Ackermand, B. F. Windley, and A. Razafiniparany: The Precambrian mobile belt of southern Madagascar / Geological Society, London, Special Publications, 43:293-296, doi:10.1144/GSL.SP.1989.043.01.20 --- I. Cartwright and A. C. Barnicoat: Evolution of the Scourian complex / Geological Society, London, Special Publications, 43:297-301, doi:10.1144/GSL.SP.1989.043.01.21 --- M. A. H. Maboko, I. McDougall, and P. K. Zeitler: Metamorphic P-T path of granulites in the Musgrave Ranges, central Australia / Geological Society, London, Special Publications, 43:303-307, doi:10.1144/GSL.SP.1989.043.01.22 --- Eileen McLellan, Daniel Linder, and Jenny Thomas: Multiple granulite-facies events in the southern Appalachians, USA / Geological Society, London, Special Publications, 43:309-314, doi:10.1144/GSL.SP.1989.043.01.23 --- James M. McLelland: Pre-granulite-facies metamorphism in the Adirondack Mountains, New York / Geological Society, London, Special Publications, 43:315-317, doi:10.1144/GSL.SP.1989.043.01.24 --- F. Mengel and T. Rivers: Thermotectonic evolution of proterozoic and reworked Archaean terranes along the Nain-Churchill boundary in the Saglek Area, northern Labrador / Geological Society, London, Special Publications, 43:319-324, doi:10.1144/GSL.SP.1989.043.01.25 --- Motoyoshi Yoichi, Satoshi Matsubara, and Hiroharu Matsueda: P-T evolution of the granulite-facies rocks of the Lützow-Holm Bay region, East Antarctica / Geological Society, London, Special Publications, 43:325-329, doi:10.1144/GSL.SP.1989.043.01.26 --- H. R. Rollinson: Garnet—orthopyroxene thermobarometry of granulites from the north marginal zone of the Limpopo belt, Zimbabwe / Geological Society, London, Special Publications, 43:331-335, doi:10.1144/GSL.SP.1989.043.01.27 --- Volker Schenk: P-T-t path of the lower crust in The Hercynian fold belt of southern Calabria / Geological Society, London, Special Publications, 43:337-342, doi:10.1144/GSL.SP.1989.043.01.28 --- Daniel Vielzeuf and Christian Pin: Geodynamic implications of granulitic rocks in the Hercynian belt / Geological Society, London, Special Publications, 43:343-348, doi:10.1144/GSL.SP.1989.043.01.29 --- R. G. Warren and B. J. Hensen: The P-T evolution of the Proterozoic Arunta Block, central Australia, and Implications for tectonic evolution / Geological Society, London, Special Publications, 43:349-355, doi:10.1144/GSL.SP.1989.043.01.30 --- D. J. Waters: Metamorphic evidence for the heating and cooling path of Namaqualand granulites / Geological Society, London, Special Publications, 43:357-363, doi:10.1144/GSL.SP.1989.043.01.31 --- I. S. Buick and T. J. B. Holland: The P-T-t path associated with crustal extension, Naxos, Cyclades, Greece / Geological Society, London, Special Publications, 43:365-369, doi:10.1144/GSL.SP.1989.043.01.32 --- M. Franceschelli, I. Memmi, F. Pannuti, and C. A. Ricci: Diachronous metamorphic equilibria in the Hercynian basement of northern Sardinia, Italy / Geological Society, London, Special Publications, 43:371-375, doi:10.1144/GSL.SP.1989.043.01.33 --- P. K. Verma: The Himalayan metamorphism / Geological Society, London, Special Publications, 43:377-383, doi:10.1144/GSL.SP.1989.043.01.34 --- A. J. Barker and M. W. Anderson: The Caledonian structural—metamorphic evolution of south Troms, Norway / Geological Society, London, Special Publications, 43:385-390, doi:10.1144/GSL.SP.1989.043.01.35 --- Kevin W. Burton, Alan P. Boyle, Wendy L. Kirk, and Roger Mason: Pressure, temperature and structural evolution of the Sulitjelma fold-nappe, central Scandinavian Caledonides / Geological Society, London, Special Publications, 43:391-411, doi:10.1144/GSL.SP.1989.043.01.36 --- A. H. N. Rice, R. E. Bevins, D. Robinson, and D. Roberts: Thrust-related metamorphic inversion in the Caledonides of Finnmark, north Norway / Geological Society, London, Special Publications, 43:413-421, doi:10.1144/GSL.SP.1989.043.01.37 --- J. P. Burg, A. F. Leyreloup, F. Romney, and C. P. Delor: Inverted metamorphic zonation and Variscan thrust tectonics in the rouergue area (Massif Central, France): P-T-t record from mineral to regional scale / Geological Society, London, Special Publications, 43:423-439, doi:10.1144/GSL.SP.1989.043.01.38 --- Cl. Audren and Cl. Triboulet: Pressure–temperature–time–deformation paths in metamorphic rocks and tectonic processes, as exemplified by the Variscan orogeny in South Brittany, France / Geological Society, London, Special Publications, 43:441-446, doi:10.1144/GSL.SP.1989.043.01.39 --- David A. Brew, Arthur B. Ford, and Glen R. Himmelberg: Evolution of the western part of the Coast plutonic–metamorphic complex, South-Eastern Alaska, USA: A Summary / Geological Society, London, Special Publications, 43:447-452, doi:10.1144/GSL.SP.1989.043.01.40 --- J. C. Schumacher, Renate Schumacher, and Peter Robinson: Acadian metamorphism in central massachusetts and south-western New Hampshire: evidence for contrasting P-T trajectories / Geological Society, London, Special Publications, 43:453-460, doi:10.1144/GSL.SP.1989.043.01.41 --- Jeffrey A. Grambling, Michael L. Williams, Christopher K. Mawer, and Roger F. Smith: Metamorphic evolution of Proterozoic rocks in New Mexico / Geological Society, London, Special Publications, 43:461-467, doi:10.1144/GSL.SP.1989.043.01.42 --- G. T. R. Droop and I. Y. Al-Filali: Magmatism, deformation and high-T, low-P regional metamorphism in the Nabitah mobile belt, southern Arabian Shield / Geological Society, London, Special Publications, 43:469-480, doi:10.1144/GSL.SP.1989.043.01.43 --- Y. Hiroi and S. Kishi: P-T evolution of Abukuma metamorphic rocks in north-east Japan: metamorphic evidence for oceanic crust obduction / Geological Society, London, Special Publications, 43:481-486, doi:10.1144/GSL.SP.1989.043.01.44 --- M. Komatsu, Y. Osanai, T. Toyoshima, and S. Miyashita: Evolution of the Hidaka metamorphic belt, northern Japan / Geological Society, London, Special Publications, 43:487-493, doi:10.1144/GSL.SP.1989.043.01.45 --- Pentti Hölttä: General features of early Proterozoic metamorphism in the Pielavesi area, Near the Archaean craton Margin, central Finland / Geological Society, London, Special Publications, 43:495-499, doi:10.1144/GSL.SP.1989.043.01.46 --- Kevin A. Jones and Michael Brown: The metamorphic evolution of the Southern Brittany migmatite belt, France / Geological Society, London, Special Publications, 43:501-505, doi:10.1144/GSL.SP.1989.043.01.47 --- P. J. O'Brien: A study of retrogression in eclogites of the Oberpfalz Forest, north-east Bavaria, West Germany, and their significance in the tectonic evolution of the Bohemian Massif / Geological Society, London, Special Publications, 43:507-512, doi:10.1144/GSL.SP.1989.043.01.48 --- I. S. Sanders: Phase relations and P-T conditions for eclogite-facies rocks at Glenelg, north-west Scotland / Geological Society, London, Special Publications, 43:513-517, doi:10.1144/GSL.SP.1989.043.01.49 --- Shohei Banno and Chihiro Sakai: Geology and metamorphic evolution of the Sanbagawa metamorphic belt, Japan / Geological Society, London, Special Publications, 43:519-532, doi:10.1144/GSL.SP.1989.043.01.50 --- Akira Takasu: P-T histories of peridotite and amphibolite tectonic blocks in the Sanbagawa metamorphic belt, Japan / Geological Society, London, Special Publications, 43:533-538, doi:10.1144/GSL.SP.1989.043.01.51 --- A. C. Barnicoat and N. Fry: Eoalpine high-pressure metamorphism in the Piemonte zone of the Alps: south-west Switzerland and north-west Italy / Geological Society, London, Special Publications, 43:539-544, doi:10.1144/GSL.SP.1989.043.01.52 --- H.-J. Massonne and C. Chopin: P-T history of the Gran Paradiso (Western Alps) metagranites based on phengite geobarometry / Geological Society, London, Special Publications, 43:545-549, doi:10.1144/GSL.SP.1989.043.01.53 --- P. J. Treble: The Voltri Group, northern Italy: an Alpine ophiolite massif / Geological Society, London, Special Publications, 43:551-556, doi:10.1144/GSL.SP.1989.043.01.54 --- Colin N. Waters: The metamorphic evolution of the Schistes lustrés ophiolite, Cap Corse, Corsica / Geological Society, London, Special Publications, 43:557-562, doi:10.1144/GSL.SP.1989.043.01.55

Description / Table of Contents: PAGEOPH, stratosphere, these differences provide us with new evidence, interpretation of which can materially help to advance our understanding of stratospheric dynamics in general. It is now weil established that smaller-scale motions-in particular gravity waves and turbulence-are of fundamental importance in the general circulation of the mesosphere; they seem to be similarly, if less spectacularly, significant in the troposphere, and probably also in the stratosphere. Our understanding of these motions, their effects on the mean circulation and their mutual interactions is progressing rapidly, as is weil illustrated by the papers in this issue; there are reports of observational studies, especially with new instruments such as the Japanese MV radar, reviews of the state of theory, a laboratory study and an analysis of gravity waves and their effects in the high resolution "SKYHI" general circulation model. There are good reasons to suspect that gravity waves may be of crucial significance in making the stratospheric circulation the way it is (modeling experience being one suggestive piece of evidence for this). Direct observational proof has thus far been prevented by the difficulty of making observations of such scales of motion in this region; in one study reported here, falling sphere observations are used to obtain information on the structure and intensity of waves in the upper stratosphere.

Description / Table of Contents: Subduction zones consume oceanic lithosphere and are an indispensible part of plate tectonics. Unlike the oceanic lithosphere production system which can be linked as a nearly continuous, albeit sinuous, strand around the earth, subduction zones are a rather dissociated group and are found in several isolated corners of the world. While plate tectonics can predict that subduction zones are required along certain plate boundaries, it does not stipulate how subduction zones initiate and develop. The preservation of newly created oceanic lithosphere and the propensity for spreading centers to fragment continents leaves a wealth of geological informa­ tion on the initiation and evolution of spreading. On the other hand, the subject of subduction initiation has little observational basis. To find such observations, we need to look at some muddled tectonic regimes. The Macquarie Ridge complex presents a natural laboratory for studies of subduction initiation. 2. Tectonics of the Macquarie Ridge Complex The Macquarie Ridge complex is a complicated physiographic feature that trends approximately north-south between South Island, New Zealand and the Pacific-Antarctica spreading center. This feature consists of a sequence of troughs and ridges, with Macquarie Island as the only exposed expression. The seismically active Macquarie Ridge complex (hereafter: MRC) is crudely continuous with the Tonga-Kermadec-New Zealand seismic activity. The basic physiographic features and seismicity of the MRC are shown in Figure I. The earthquake epicenters generally cluster about the bathymetric expression of the MRC.

Description / Table of Contents: Deltaic Systems and General Models --- T. Elliott: Deltaic systems and their contribution to an understanding of basin-fill successions / Geological Society, London, Special Publications, 41:3-10, doi:10.1144/GSL.SP.1989.041.01.01 --- J. Alexander: Delta or coastal plain? With an example of the controversy from the Middle Jurassic of Yorkshire / Geological Society, London, Special Publications, 41:11-19, doi:10.1144/GSL.SP.1989.041.01.02 --- J. P. M. Syvitski and G. E. Farrow: Fjord sedimentation as an analogue for small hydrocarbon-bearing fan deltas / Geological Society, London, Special Publications, 41:21-43, doi:10.1144/GSL.SP.1989.041.01.03 --- M. Ito: Profiles of fan deltas and water depth in the receiving basin / Geological Society, London, Special Publications, 41:45-54, doi:10.1144/GSL.SP.1989.041.01.04 --- Subsurface and Geophysical Techniques --- G. Cowan: Diagenesis of Upper Carboniferous sandstones: southern North Sea Basin / Geological Society, London, Special Publications, 41:57-73, doi:10.1144/GSL.SP.1989.041.01.05 --- C. S. Bristow and K. J. Myers: Detailed sedimentology and gamma-ray log characteristics of a Namurian deltaic succession I: Sedimentology and facies analysis / Geological Society, London, Special Publications, 41:75-80, doi:10.1144/GSL.SP.1989.041.01.06 --- K. J. Myers and C. S. Bristow: Detailed sedimentology and gamma-ray log characteristics of a Namurian deltaic succession II: Gamma-ray logging / Geological Society, London, Special Publications, 41:81-88, doi:10.1144/GSL.SP.1989.041.01.07 --- R. C. Selley: Deltaic reservoir prediction from rotational dipmeter patterns / Geological Society, London, Special Publications, 41:89-95, doi:10.1144/GSL.SP.1989.041.01.08 --- Selected Delta Case Studies --- G. Sestini: Nile Delta: a review of depositional environments and geological history / Geological Society, London, Special Publications, 41:99-127, doi:10.1144/GSL.SP.1989.041.01.09 --- H. Okazaki and F. Masuda: Arcuate and bird’s foot deltas in the late Pleistocene Palaeo-Tokyo Bay / Geological Society, London, Special Publications, 41:129-138, doi:10.1144/GSL.SP.1989.041.01.10 --- G. K. Pedersen: A fluvial-dominated lacustrine delta in a volcanic province, W Greenland / Geological Society, London, Special Publications, 41:139-146, doi:10.1144/GSL.SP.1989.041.01.11 --- J. P. Harris: The sedimentology of a Middle Jurassic lagoonal delta system: Elgol Formation (Great Estuarine Group), NW Scotland / Geological Society, London, Special Publications, 41:147-166, doi:10.1144/GSL.SP.1989.041.01.12 --- O. J. Martinsen: Styles of soft-sediment deformation on a Namurian (Carboniferous) delta slope, Western Irish Namurian Basin, Ireland / Geological Society, London, Special Publications, 41:167-177, doi:10.1144/GSL.SP.1989.041.01.13 --- A. J. Pulham: Controls on internal structure and architecture of sandstone bodies within Upper Carboniferous fluvial-dominated deltas, County Clare, western Ireland / Geological Society, London, Special Publications, 41:179-203, doi:10.1144/GSL.SP.1989.041.01.14 --- A. Siedlecka, K. T. Pickering, and M. B. Edwards: Upper Proterozoic passive margin deltaic complex, Finnmark, N Norway / Geological Society, London, Special Publications, 41:205-219, doi:10.1144/GSL.SP.1989.041.01.15 --- Petroleum- and Gas-related Case Histories --- S. Flint, D. J. Stewart, and E. D. van Riessen: Reservoir geology of the Sirikit oilfield, Thailand: lacustrine deltaic sedimentation in a Tertiary intermontane basin / Geological Society, London, Special Publications, 41:223-235, doi:10.1144/GSL.SP.1989.041.01.16 --- W. Helland-Hansen, R. Steel, K. Nakayama, and C. G. St. C. Kendall: Review and computer modelling of the Brent Group stratigraphy / Geological Society, London, Special Publications, 41:237-252, doi:10.1144/GSL.SP.1989.041.01.17 --- S. Brown and P. C. Richards: Facies and development of the Middle Jurassic Brent Delta near the northern limit of its progradation, UK North Sea / Geological Society, London, Special Publications, 41:253-267, doi:10.1144/GSL.SP.1989.041.01.18 --- S. E. Livera: Facies associations and sand-body geometries in the Ness Formation of the Brent Group, Brent Field / Geological Society, London, Special Publications, 41:269-286, doi:10.1144/GSL.SP.1989.041.01.19 --- Coal-related Case Histories --- R. S. Haszeldine: Coal reviewed: depositional controls, modern analogues and ancient climates / Geological Society, London, Special Publications, 41:289-308, doi:10.1144/GSL.SP.1989.041.01.20 --- A. C. Scott: Deltaic coals: an ecological and palaeobotanical perspective / Geological Society, London, Special Publications, 41:309-316, doi:10.1144/GSL.SP.1989.041.01.21 --- M. K. G. Whateley and G. R. Jordan: Fan-delta-lacustrine sedimentation and coal development in the Tertiary Ombilin Basin, W Sumatra, Indonesia / Geological Society, London, Special Publications, 41:317-332, doi:10.1144/GSL.SP.1989.041.01.22 --- W. A. Read: The influence of basin subsidence and depositional environment on regional patterns of coal thickness within the Namurian fluvio-deltaic sedimentary fill of the Kincardine Basin, Scotland / Geological Society, London, Special Publications, 41:333-344, doi:10.1144/GSL.SP.1989.041.01.23

Description / Table of Contents: The Fifth Meeting on Nonlinear Partial Differential Equations (PDEs) was held at Research Institute of Mathematical Institute, Kyoto University from January 6 to January 9, 1988

Description / Table of Contents: Mike Coward and Dorothee Dietrich: Alpine tectonics — an overview / Geological Society, London, Special Publications, 45:1-29, doi:10.1144/GSL.SP.1989.045.01.01 --- Tectonic Evolution of the External Zones of the Alps --- J. G. Ramsay: Fold and fault geometry in the western Helvetic nappes of Switzerland and France and its implication for the evolution of the arc of the western Alps / Geological Society, London, Special Publications, 45:33-45, doi:10.1144/GSL.SP.1989.045.01.02 --- D. Dietrich and M. Casey: A new tectonic model for the Helvetic nappes / Geological Society, London, Special Publications, 45:47-63, doi:10.1144/GSL.SP.1989.045.01.03 --- J.-P. Gratier, G. Ménard, and R. Arpin: Strain-displacement compatibility and restoration of the Chaînes Subalpines of the western Alps / Geological Society, London, Special Publications, 45:65-81, doi:10.1144/GSL.SP.1989.045.01.04 --- N. Fry: Southwestward thrusting and tectonics of the western Alps / Geological Society, London, Special Publications, 45:83-109, doi:10.1144/GSL.SP.1989.045.01.05 --- Tectonic Evolution of the Internal and Southern Zones of the Alps --- O. Merle, P. R. Cobbold, and S. Schmid: Tertiary kinematics in the Lepontine dome / Geological Society, London, Special Publications, 45:113-134, doi:10.1144/GSL.SP.1989.045.01.06 --- J. P. Platt, P. C. Cunningham, P. Weston, G. S. Lister, F. Peel, T. Baudin, and H. Dondey: Thrusting and backthrusting in the Briançonnais domain of the western Alps / Geological Society, London, Special Publications, 45:135-152, doi:10.1144/GSL.SP.1989.045.01.07 --- S. M. Schmid, H. R. Aebli, F. Heller, and A. Zingg: The role of the Periadriatic Line in the tectonic evolution of the Alps / Geological Society, London, Special Publications, 45:153-171, doi:10.1144/GSL.SP.1989.045.01.08 --- A. C. Ellis, A. C. Barnicoat, and N. Fry: Structural and metamorphic constraints on the tectonic evolution of the upper Pennine Alps / Geological Society, London, Special Publications, 45:173-188, doi:10.1144/GSL.SP.1989.045.01.09 --- J. Ridley: Structural and metamorphic history of a segment of the Sesia-Lanzo zone, and its bearing on the kinematics of Alpine deformation in the western Alps / Geological Society, London, Special Publications, 45:189-201, doi:10.1144/GSL.SP.1989.045.01.10 --- K. H. Brodie, E. H. Rutter, and D. Rex: On the age of deep crustal extensional faulting in the Ivrea zone, northern Italy / Geological Society, London, Special Publications, 45:203-210, doi:10.1144/GSL.SP.1989.045.01.11 --- D. Roeder: South-Alpine thrusting and trans-Alpine convergence / Geological Society, London, Special Publications, 45:211-227, doi:10.1144/GSL.SP.1989.045.01.12 --- H. P. Laubscher: The tectonics of the southern Alps and the Austro-Alpine nappes: a comparison / Geological Society, London, Special Publications, 45:229-241, doi:10.1144/GSL.SP.1989.045.01.13 --- L. Ratschbacher and F. Neubauer: West-directed décollement of Austro-Alpine cover nappes in the eastern Alps: geometrical and rheological considerations / Geological Society, London, Special Publications, 45:243-262, doi:10.1144/GSL.SP.1989.045.01.14 --- Models of the Development of the Alpine Chain --- J. F. Dewey, M. L. Helman, S. D. Knott, E. Turco, and D. H. W. Hutton: Kinematics of the western Mediterranean / Geological Society, London, Special Publications, 45:265-283, doi:10.1144/GSL.SP.1989.045.01.15 --- J. E. T. Channell and J. C. Mareschal: Delamination and asymmetric lithospheric thickening in the development of the Tyrrhenian Rift / Geological Society, London, Special Publications, 45:285-302, doi:10.1144/GSL.SP.1989.045.01.16 --- St. Mueller: Deep-reaching geodynamic processes in the Alps / Geological Society, London, Special Publications, 45:303-328, doi:10.1144/GSL.SP.1989.045.01.17 --- P. Vialon, P. Rochette, and G. Ménard: Indentation and rotation in the western Alpine arc / Geological Society, London, Special Publications, 45:329-338, doi:10.1144/GSL.SP.1989.045.01.18 --- R. Lacassin: Plate-scale kinematics and compatibility of crustal shear zones in the Alps / Geological Society, London, Special Publications, 45:339-352, doi:10.1144/GSL.SP.1989.045.01.19 --- J. C. Hunziker, J. Desmons, and G. Martinotti: Alpine thermal evolution in the central and the western Alps / Geological Society, London, Special Publications, 45:353-367, doi:10.1144/GSL.SP.1989.045.01.20 --- A. J. Hurford, M. Flisch, and E. Jäger: Unravelling the thermo-tectonic evolution of the Alps: a contribution from fission track analysis and mica dating / Geological Society, London, Special Publications, 45:369-398, doi:10.1144/GSL.SP.1989.045.01.21 --- F. Heller, W. Lowrie, and A. M. Hirt: A review of palaeomagnetic and magnetic anisotropy results from the Alps / Geological Society, London, Special Publications, 45:399-420, doi:10.1144/GSL.SP.1989.045.01.22 --- K. J. Hsü: Time and place in Alpine orogenesis — the Fermor Lecture / Geological Society, London, Special Publications, 45:421-443, doi:10.1144/GSL.SP.1989.045.01.23

Description / Table of Contents: M. A. Cooper and G. D. Williams: Introduction / Geological Society, London, Special Publications, 44:vii, doi:10.1144/GSL.SP.1989.044.01.01 --- Modelling and Theoretical Concepts --- G. D. Williams, C. M. Powell, and M. A. Cooper: Geometry and kinematics of inversion tectonics / Geological Society, London, Special Publications, 44:3-15, doi:10.1144/GSL.SP.1989.044.01.02 --- A. B. Hayward and R. H. Graham: Some geometrical characteristics of inversion / Geological Society, London, Special Publications, 44:17-39, doi:10.1144/GSL.SP.1989.044.01.03 --- K. R. McClay: Analogue models of inversion tectonics / Geological Society, London, Special Publications, 44:41-59, doi:10.1144/GSL.SP.1989.044.01.04 --- Inversion in the Alps and Alpine Foreland --- P. A. Ziegler: Geodynamic model for Alpine intra-plate compressional deformation in Western and Central Europe / Geological Society, London, Special Publications, 44:63-85, doi:10.1144/GSL.SP.1989.044.01.05 --- P. C. de Graciansky, G. Dardeau, M. Lemoine, and P. Tricart: The inverted margin of the French Alps and foreland basin inversion / Geological Society, London, Special Publications, 44:87-104, doi:10.1144/GSL.SP.1989.044.01.06 --- R. W. H. Butler: The influence of pre-existing basin structure on thrust system evolution in the Western Alps / Geological Society, London, Special Publications, 44:105-122, doi:10.1144/GSL.SP.1989.044.01.07 --- I. R. Simpson, M. Gravestock, D. Ham, H. Leach, and S. D. Thompson: Notes and cross-sections illustrating inversion tectonics in the Wessex Basin / Geological Society, London, Special Publications, 44:123-129, doi:10.1144/GSL.SP.1989.044.01.08 --- D. G. Roberts: Basin inversion in and around the British Isles / Geological Society, London, Special Publications, 44:131-150, doi:10.1144/GSL.SP.1989.044.01.09 --- Inversion on the European Continental Shelf --- J. A. Cartwright: The kinematics of inversion in the Danish Central Graben / Geological Society, London, Special Publications, 44:153-175, doi:10.1144/GSL.SP.1989.044.01.10 --- T. J. Chapman: The Permian to Cretaceous structural evolution of the Western Approaches Basin (Melville sub-basin), UK / Geological Society, London, Special Publications, 44:177-200, doi:10.1144/GSL.SP.1989.044.01.11 --- M. E. Badley, J. D. Price, and L. C. Backshall: Inversion, reactivated faults and related structures: seismic examples from the southern North Sea / Geological Society, London, Special Publications, 44:201-219, doi:10.1144/GSL.SP.1989.044.01.12 --- Inversion in Other Geological Environments --- C. M. Powell and G. D. Williams: The Lewis Thrust/Rocky Mountain trench fault system in Northwest Montana, USA: an example of negative inversion tectonics? / Geological Society, London, Special Publications, 44:223-234, doi:10.1144/GSL.SP.1989.044.01.13 --- K. R. McClay, M. W. Insley, and R. Anderton: Inversion of the Kechika Trough, Northeastern British Columbia, Canada / Geological Society, London, Special Publications, 44:235-257, doi:10.1144/GSL.SP.1989.044.01.14 --- C. K. Morley: Basin inversion in the Osen-Røa thrust sheet, Southern Norway / Geological Society, London, Special Publications, 44:259-273, doi:10.1144/GSL.SP.1989.044.01.15 --- M. P. Coward, M. A. Enfield, and M. W. Fischer: Devonian basins of Northern Scotland: extension and inversion related to Late Caledonian — Variscan tectonics / Geological Society, London, Special Publications, 44:275-308, doi:10.1144/GSL.SP.1989.044.01.16 --- M. C. Daly, J. Chorowicz, and J. D. Fairhead: Rift basin evolution in Africa: the influence of reactivated steep basement shear zones / Geological Society, London, Special Publications, 44:309-334, doi:10.1144/GSL.SP.1989.044.01.17 --- M. A. Cooper, G. D. Williams, P. C. de Graciansky, R. W. Murphy, T. Needham, D. de Paor, R. Stoneley, S. P. Todd, J. P. Turner, and P. A. Ziegler: Inversion tectonics — a discussion / Geological Society, London, Special Publications, 44:335-347, doi:10.1144/GSL.SP.1989.044.01.18 --- Abstracts --- I. W. D. Dalziel: Inversion of circum-Pacific marginal basins / Geological Society, London, Special Publications, 44:351, doi:10.1144/GSL.SP.1989.044.01.19 --- J. F. Dewey: Kinematics and dynamics of basin inversion / Geological Society, London, Special Publications, 44:352, doi:10.1144/GSL.SP.1989.044.01.20 --- A. Gibbs and A. Beach: Extensional tectonics in a convergent intra-plate setting: linked inversions on oblique and frontal ramps / Geological Society, London, Special Publications, 44:353, doi:10.1144/GSL.SP.1989.044.01.21 --- R. Gillcrist, M. P. Coward, B. Trudgill, A. Pecher, and J. L. Mugnier: Structural inversion in the external French Alps / Geological Society, London, Special Publications, 44:354, doi:10.1144/GSL.SP.1989.044.01.22 --- N. J. Kusznir and G. D. Williams: Geometric, thermal and isostatic constraints on basin inversion / Geological Society, London, Special Publications, 44:355, doi:10.1144/GSL.SP.1989.044.01.23 --- B. van Hoorn: Structural evolution, timing and tectonic style of the Sole Pit inversion / Geological Society, London, Special Publications, 44:356, doi:10.1144/GSL.SP.1989.044.01.24

Description / Table of Contents: A. D. Saunders and M. J. Norry: Introduction / Geological Society, London, Special Publications, 42:vii-viii, doi:10.1144/GSL.SP.1989.042.01.01 --- I. G. Gass: Magmatic processes at and near constructive plate margins as deduced from the Troodos (Cyprus) and Semail Nappe (N Oman) ophiolites / Geological Society, London, Special Publications, 42:1-15, doi:10.1144/GSL.SP.1989.042.01.02 --- Robert S. White: Asthenospheric control on magmatism in the ocean basins / Geological Society, London, Special Publications, 42:17-27, doi:10.1144/GSL.SP.1989.042.01.03 --- John G. Spray: Upper mantle segregation processes: evidence from alpine-type peridotites / Geological Society, London, Special Publications, 42:29-40, doi:10.1144/GSL.SP.1989.042.01.04 --- James H. Natland: Partial melting of a lithologically heterogeneous mantle: inferences from crystallization histories of magnesian abyssal tholeiites from the Siqueiros Fracture Zone / Geological Society, London, Special Publications, 42:41-70, doi:10.1144/GSL.SP.1989.042.01.05 --- H. J. B. Dick: Abyssal peridotites, very slow spreading ridges and ocean ridge magmatism / Geological Society, London, Special Publications, 42:71-105, doi:10.1144/GSL.SP.1989.042.01.06 --- Sherman H. Bloomer, James H. Natland, and Robert L. Fisher: Mineral relationships in gabbroic rocks from fracture zones of Indian Ocean ridges: evidence for extensive fractionation, parental diversity and boundary-layer recrystallization / Geological Society, London, Special Publications, 42:107-124, doi:10.1144/GSL.SP.1989.042.01.07 --- Don Elthon: Pressure of origin of primary mid-ocean ridge basalts / Geological Society, London, Special Publications, 42:125-136, doi:10.1144/GSL.SP.1989.042.01.08 --- Toshitsugu Fujii: Genesis of mid-ocean ridge basalts / Geological Society, London, Special Publications, 42:137-146, doi:10.1144/GSL.SP.1989.042.01.09 --- Z. A. Palacz and J. A. Wolff: Strontium, neodymium and lead isotope characteristics of the Granadilla Pumice, Tenerife: a study of the causes of strontium isotope disequilibrium in felsic pyroclastic deposits / Geological Society, London, Special Publications, 42:147-159, doi:10.1144/GSL.SP.1989.042.01.10 --- M. Storey, J. A. Wolff, M. J. Norry, and G. F. Marriner: Origin of hybrid lavas from Agua de Pau volcano, Sao Miguel, Azores / Geological Society, London, Special Publications, 42:161-180, doi:10.1144/GSL.SP.1989.042.01.11 --- G. Thompson, W. B. Bryan, and S. E. Humphris: Axial volcanism on the East Pacific Rise, 10–12°N / Geological Society, London, Special Publications, 42:181-200, doi:10.1144/GSL.SP.1989.042.01.12 --- Johann Helgason: The Fjallgardar volcanic ridge in NE Iceland: an aborted early stage plate boundary or a volcanically dormant zone? / Geological Society, London, Special Publications, 42:201-213, doi:10.1144/GSL.SP.1989.042.01.13 --- P. A. Floyd: Geochemical features of intraplate oceanic plateau basalts / Geological Society, London, Special Publications, 42:215-230, doi:10.1144/GSL.SP.1989.042.01.14 --- G. R. Davies, R. A. Cliff, M. J. Norry, and D. C. Gerlach: A combined chemical and Pb-Sr-Nd isotope study of the Azores and Cape Verde hot-spots: the geodynamic implications / Geological Society, London, Special Publications, 42:231-255, doi:10.1144/GSL.SP.1989.042.01.15 --- D. J. Chaffey, R. A. Cliff, and B. M. Wilson: Characterization of the St Helena magma source / Geological Society, London, Special Publications, 42:257-276, doi:10.1144/GSL.SP.1989.042.01.16 --- J.-L. Joron and M. Treuil: Hygromagmaphile element distributions in oceanic basalts as fingerprints of partial melting and mantle heterogeneities: a specific approach and proposal of an identification and modelling method / Geological Society, London, Special Publications, 42:277-299, doi:10.1144/GSL.SP.1989.042.01.17 --- D. E. Fisher: Evaluation of rare gas data in relation to oceanic magmas / Geological Society, London, Special Publications, 42:301-311, doi:10.1144/GSL.SP.1989.042.01.18 --- S.-s. Sun and W. F. McDonough: Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes / Geological Society, London, Special Publications, 42:313-345, doi:10.1144/GSL.SP.1989.042.01.19 --- B. J. Murton: Tectonic controls on boninite genesis / Geological Society, London, Special Publications, 42:347-377, doi:10.1144/GSL.SP.1989.042.01.20

Description / Table of Contents: This study provides a detailed chemical and structural profile of first-year and multiyear Arctic sea ice. Ice cores were collected during April- May 1986 and 1987 near Prudhoe Bay, Alaska. Concentrations of Cl, Br, SO4, Na, Ca, K, Mg, PO4, SiO4, NO3, NO2 and NH4 were determined for samples chosen on the basis of structural ice type. Chemical and statistical analyses indicate that finer-grained structures incorporate more impurities and that major ion chemistry is controlled almost entirely by salinity. Mg is enriched in the ice indicating precipitation is occurring at temperatures higher than previously reported. K is depleted in the ice suggesting preferrential drainage. Ratios of the major ions are the same for first-year and multiyear ice and are similar to that of seawater indicating that as the ice ages no significant changes occur in ice chemistry. Nutrient concentrations in the ice are enriched with respect to the underlying water, indicating that biological activity occurs in the ice and processes other than the overall salinity effect and brine drainage are affecting nutrient concentrations within the ice.

Description / Table of Contents: An account of the results of the 2 March 1987 earthquake in the eastern Bay of Plenty and the aftermath's effects on the people and places on the Rangitaiki Plains

Description / Table of Contents: The authors of this volume presented a short course on the rare earth elements to about 80 participants in San Francisco, California, December 1-3, 1989, just prior to the fall meeting of the American Geophysical Union.