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  • 1
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    Die Energieregion Ruhrgebiet (2023)
    Nomos Verlagsgesellschaft mbH & Co. KG
    Details
    Publikationsdatum: 2023-08-07
    Beschreibung: Despite the cessation of coal mining in 2018, the Ruhr area continues to be of considerable importance for the German energy supply. The study uses statistical data to discuss the development since the mid-19th century. The focus is on the historical energy turns triggered by coal, electricity supply, oil and natural gas and the associated processes of change. Another focus, also with topical relevance, is on the nearly one hundred years of experience in the hydrogen economy as the basis of the chemical industry. Thus, for the first time, it offers a synthesis of the diverse energy-economic relationships within the region.
    Beschreibung: Published
    Beschreibung: Trotz der Einstellung des Steinkohlenbergbaus 2018 besitzt das Ruhrgebiet weiterhin eine erhebliche Bedeutung für die deutsche Energieversorgung. Die Studie diskutiert anhand statistischer Daten die Entwicklung seit Mitte des 19. Jahrhunderts. Im Vordergrund stehen die durch Kohle, Elektrizitätsversorgung, Erdöl und Erdgas ausgelösten historischen Energiewenden und die damit verbundenen Wandlungsprozesse. Ein weiterer Schwerpunkt liegt, ebenfalls mit aktuellem Bezug, auf den annähernd hundertjährigen Erfahrungen im Bereich der Wasserstoffwirtschaft als Grundlage der chemischen Industrie. Damit bietet es erstmals eine Synthese der vielfältigen energiewirtschaftlichen Beziehungen innerhalb der Region.
    Schlagwort(e): 19th century ; 19. Jahrhundert ; chemische Industrie ; chemical industry ; Deutschland ; coal ; coal mining ; Elektrizitätsversorgung ; electricity supply ; Energieregion ; energy industry ; Energieversorgung ; Energiewende ; energy region ; Energiewirtschaft ; energy supply ; energy transition ; Erdgas ; Germany ; Erdöl ; hydrogen economy ; Kohle ; natural gas ; Ruhrgebiet ; petroleum ; Statistik ; Ruhr area ; Steinkohlenbergbau ; statistics ; Synthese ; Wandlungsprozesse ; synthesis ; transformation processes ; Wasserstoffwirtschaft ; KZC ; KNB ; 3JJ ; 1DFG ; 3JH ; 3JM
    Sprache: Deutsch
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    E-BOOK
  • 2
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    Detrital Mineral U/Pb Age Dating and Geochemistry of Magmatic Products in Basin Sequences (2023)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publikationsdatum: 2024-03-27
    Beschreibung: Dating and geochemical analyses of detrital minerals (mainly zircons) combined with traditional methods, such as heavy minerals and sandstone modes, are a powerful tool in paleogeographic and paleotectonic research and industrial applications.
    Schlagwort(e): detrital zircon U-Pb geochronology ; bulk geochemistry ; provenance ; tectonic setting ; West Bogeda Shan ; U-Pb geochronology ; detrital zircon ; source-to-sink ; provenance analysis ; mixing model ; sediment budgeting ; east China seas ; Pennsylvanian ; Sino-Korean Block ; detrital zircons ; U–Pb ages ; subduction zones ; U–Pb dating ; sandstone petrography ; peripheral bulge ; tectonics ; zircon U-Pb ages ; muscovite 40Ar/39Ar ages ; sediment provenance ; Yangtze River ; detrital-zircon age spectrum ; Ereendavaa terrane ; Mongol-Okhotsk orogenic belt ; opening of the Mongol-Okhotsk ocean ; northeastern Mongolia ; Lu-Hf isotopes ; early Miocene ; Yinggehai-Song Hong Basin ; South China Sea ; stratigraphic thicknesses ; net sand to gross thickness ratio ; conglomerate percentage ; heavy mineral analysis ; detrital zircon U‒Pb geochronology ; Intermontane basin ; Mongolia ; laser ablation U-Pb dating ; Hafnium isotope-ratio ; terrane definition ; paleotectonic reconstruction ; Western Andes ; Miocene ; Silante Formation ; Ecuador ; compositional heterogeneity ; major element ; nonmarine basin ; gejiu basalts ; zircon U–Pb dating ; geochemistry ; Sr–Nd–Pb isotope ; petrogenesis ; Cameroon ; Meiganga ; gold placer ; trace element ; geochronology ; Archean-Proterozoic origins ; zircon crystal morphology ; zircon textures ; zircon trace elements ; alteration of zircon ; REE in zircon ; rare metal granites ; Li-F granites ; Western Hercynian Meseta ; Permian basin ; Tiddas Souk Es-Sebt des ait ikko volcanic basin ; U–Pb geochronology ; mineralogy ; petrology ; n/a ; thema EDItEUR::G Reference, Information and Interdisciplinary subjects::GP Research and information: general
    Sprache: Englisch
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    E-BOOK
  • 3
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    Temporal evolution of the Fogo Volcano magma storage system (Cape Verde Archipelago): a fluid inclusions perspective (2023)
    Elsevier
    Details
    Publikationsdatum: 2023-01-27
    Beschreibung: The architecture of the magma storage system underneath Fogo Volcano (Cape Verde Archipelago) is characterised using novel fluid inclusion results from fifteen basanites, spanning the last 120 thousand years of volcanic activity, and encompassing a major flank collapse event at ~73 ka. Fluid inclusions, hosted in olivine and clinopyroxene, are made of pure CO2, and based on their textural characteristics, are distinguished in early (Type I) and late (Type II) stage. Inclusions homogenize to a liquid phase in the 2.8 to 30.8 ◦C temperature range. Densities values, recalculated assuming an original 10% H2O content at the time of trapping, range from 543 to 952 kg⋅m3, and correspond to entrapment or re-equilibration pressure ranges of 500–595 MPa, 700–740 MPa, and 245–610 MPa respectively for pre-collapse, early post-collapse, and Holocene/historical eruptions. These entrapment pressures are interpreted as reflecting the existence of two main magma accumulation zones at ~25 km and ~ 13–21 km depth, and a zone of fluid inclusion re-equilibration at 9–12 km depth. There is evidence of a complex temporal evolution of the magma system. Historical eruptions, and especially the three most recent ones (occurred in 1951, 1995 and 2014–25), bring fluid inclusion evidence for transient, pre-eruptive shallow (9–17 km depth) magma ponding. Early post-collapse (60 ka) volcanics, in contrast, document fast magma transport from ~25 km, and suggest a reconfiguration of the magma system after the Monte Amarelo collapse event.
    Beschreibung: Published
    Beschreibung: 107730
    Beschreibung: 2V. Struttura e sistema di alimentazione dei vulcani
    Beschreibung: JCR Journal
    Schlagwort(e): Oceanic island volcanism ; Magma ascent path ; 04.08. Volcanology ; petrology
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: article
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  • 4
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    Rapid shifting of a deep magmatic source at Fagradalsfjall volcano, Iceland (2023)
    Nature PG
    Details
    Publikationsdatum: 2024-01-26
    Beschreibung: Recent Icelandic rifting events have illuminated the roles of centralized crustal magma reservoirs and lateral magma transport1-4, important characteristics of mid-ocean ridge magmatism1,5. A consequence of such shallow crustal processing of magmas4,5 is the overprinting of signatures that trace the origin, evolution and transport of melts in the uppermost mantle and lowermost crust6,7. Here we present unique insights into processes occurring in this zone from integrated petrologic and geochemical studies of the 2021 Fagradalsfjall eruption on the Reykjanes Peninsula in Iceland. Geochemical analyses of basalts erupted during the first 50 days of the eruption, combined with associated gas emissions, reveal direct sourcing from a near-Moho magma storage zone. Geochemical proxies, which signify different mantle compositions and melting conditions, changed at a rate unparalleled for individual basaltic eruptions globally. Initially, the erupted lava was dominated by melts sourced from the shallowest mantle but over the following three weeks became increasingly dominated by magmas generated at a greater depth. This exceptionally rapid trend in erupted compositions provides an unprecedented temporal record of magma mixing that filters the mantle signal, consistent with processing in near-Moho melt lenses containing 107-108 m3 of basaltic magma. Exposing previously inaccessible parts of this key magma processing zone to near-real-time investigations provides new insights into the timescales and operational mode of basaltic magma systems.
    Beschreibung: The NordSIMS ion microprobe facility acknowledges support by the Swedish Research Council (grant no. 2017-00671), the Swedish Museum of Natural History and the University of Iceland; this is NordSIMS publication no. 713. The involvement of S.A.H. was partly in relation to H2020 project EUROVOLC, funded by the European Commission (grant no. 731070). This work was supported by the Icelandic Research Fund, grant no. 228933-051. A.A. ackowledges funding from Italian Ministero Istruzione Università e Ricerca (Miur), grant PRIN2017-2017LMNLAW
    Beschreibung: Published
    Beschreibung: 529–534
    Beschreibung: 4V. Processi pre-eruttivi
    Beschreibung: JCR Journal
    Schlagwort(e): Fagradalsfjall ; Icelandic rifting ; geochemistry ; petrology ; 04.08. Volcanology
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: article
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  • 5
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    Deep Carbon (2022)
    Cambridge University Press
    Details
    Publikationsdatum: 2022-08-09
    Beschreibung: Summarizing ten years of research by the Deep Carbon Observatory, this is a comprehensive guide to carbon inside Earth - its quantities, movements, forms, origins, changes over time, and impact on planetary processes - for students and researchers in Earth and planetary sciences. Also available as Open Access on Cambridge Core.
    Schlagwort(e): geochemistry ; biogeochemistry ; petrology ; volcanology ; Earth system science ; planetary science ; bic Book Industry Communication::R Earth sciences, geography, environment, planning::RB Earth sciences::RBG Geology & the lithosphere::RBGK Geochemistry ; bic Book Industry Communication::R Earth sciences, geography, environment, planning::RB Earth sciences::RBG Geology & the lithosphere::RBGG Petrology ; bic Book Industry Communication::W Lifestyle, sport & leisure::WN Natural history::WNR Rocks, minerals & fossils ; bic Book Industry Communication::P Mathematics & science::PG Astronomy, space & time::PGS Solar system: the Sun & planets ; bic Book Industry Communication::R Earth sciences, geography, environment, planning::RN The environment::RNC Applied ecology
    Sprache: Englisch
    Format: image/jpeg
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    E-BOOK
  • 6
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    Unterwegs – Mobiles Leben in der Erdgas- und Erdölindustrie in Russlands Arktis (2021)
    Böhlau
    Details
    Publikationsdatum: 2024-03-30
    Beschreibung: Barely known in public is the life of long-distance commute workers who extract the „blue and black gold” for the export to Europe. They are travelling people who work and live rotationally for a few weeks at the extraction sites before they go back again to their families in the southern regions. This ethnography takes the reader from the Volga Region to the Arcitc “Russian Gas Capital” Novy Urengoy and provides critically insights into the Russian petroleum industry.
    Beschreibung: Nahezu unbekannt sind der Öffentlichkeit die Lebensweisen jener ArbeiterInnen, die das „schwarze und blaue Gold“ für den Export nach Europa fördern. Sie sind fahrende und fliegende Menschen, die zyklisch für Wochen oder Monate in den Fördergebieten leben und arbeiten, um wieder für eine Weile zu ihren Familien heimzukehren. Die Ethnographie führt von der Wolgaregion in die subarktische „russische Gashauptstadt“ Novy Urengoy und gibt einen kritischen Einblick in die russische Petroleumindustrie.
    Schlagwort(e): Crude oil ; natural gas ; Russia ; Siberia ; Arctic ; long-distance commuting (LDC) ; fly-in/fly-out (FIFO) ; mobility ; normality ; multi-locality ; Erdöl ; Erdgas ; Russland ; Sibirien ; Arktis ; Fernpendleln ; Mobilität ; Normalität ; Multilokalität ; Gazprom ; Novy Urengoy ; thema EDItEUR::K Economics, Finance, Business and Management::KC Economics
    Sprache: Englisch , Deutsch , Russisch
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    E-BOOK
  • 7
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    Wasserdampfreformierung von Erdgas mit Rhodiumkatalysatoren: Aktivität und Deaktivierung (2021)
    KIT Scientific Publishing
    Details
    Publikationsdatum: 2024-04-05
    Beschreibung: Diese Arbeit befasst sich mit der Wasserdampfreformierung von Methan, Ethan, Propan, Butan und Alkanmischungen an einem mit Rhodium beladenen Wabenkatalysator, der Entwicklung eines mehrstufigen Reaktionsmechanismus dazu und dessen Validierung unter Verwendung numerischer Modelle. Simulationen mit dem Mechanismus erlauben, Einblicke in das molekulare Geschehen im Reaktor zu nehmen und Vorhersagen für ähnliche Reaktionssysteme abzugeben. Auch die Katalysatordeaktivierung wird untersucht.
    Schlagwort(e): QD1-999 ; Erdgas ; Wasserdampfreformierung ; numerische Simulation ; Rhodiumkatalysator ; Reaktionsmechanismus ; thema EDItEUR::P Mathematics and Science::PN Chemistry
    Sprache: Deutsch
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    E-BOOK
  • 8
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    Applications of SEM Automated Mineralogy (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publikationsdatum: 2024-03-27
    Beschreibung: During the last decade, software developments in Scanning Electron Microscopy (SEM) provoked a notable increase of applications to the study of solid matter. The mineral liberation analysis (MLA) of processed metal ores was an important drive for innovations that led to QEMSCAN, MLA and other software platforms. These combine the assessment of the backscattered electron (BSE) image to the directed steering of the electron beam for energy dispersive spectroscopy (EDS) to automated mineralogy. However, despite a wide distribution of SEM instruments in material research and industry, the potential of SEM automated mineralogy is still under-utilised. The characterisation of primary ores, and the optimisation of comminution, flotation, mineral concentration and metallurgical processes in the mining industry by generating quantified data, is still the major application field of SEM automated mineralogy. However, there is interesting potential beyond these classical fields of geometallurgy and metal ore fingerprinting. Slags, pottery and artefacts can be studied in an archeological context for the recognition of provenance and trade pathways; soil, and solid particles of all kinds, are objects in forensic science. SEM automated mineralogy allows new insight in the fields of process chemistry and recycling technology.
    Schlagwort(e): Zr-REE-Nb deposits ; alkaline rocks ; automated mineralogy ; Khalzan Buregtei ; automated scanning electron microscopy ; QEMSCAN® ; trace minerals ; gold ; REE minerals ; REE carbonatite ore ; comminution ; multi-stage flotation ; EDX spectra ; MLA ; mineral processing ; iron ore ; Kiruna ; Raman spectroscopy ; magnetite ; hematite ; scanning electron microscopy (SEM) ; automated quantitative analysis (AQM) ; spectrum quantification ; signal deconvolution ; fault gouge ; 200-nm resolution ; grain size distribution ; Ikkattup nunaa ; mineral maps ; submicrometer ; automated quantitative mineralogy (AQM) ; scanning electron microscopy ; ZEISS Mineralogic ; Fiskenæsset complex ; Feret angle ; element concentration map ; visualization ; mineral association ; bulk composition ; grain size ; waste of electrical and electronic equipment ; X-ray computed tomography ; mineral liberation analysis ; indicator minerals ; heavy mineral concentrates ; till sampling ; VMS ; Izok Lake ; sewage sludge ashes (SSA) ; phosphate ; recycling ; recovery ; SEM-automated mineralogy ; mineral liberation analysis (MLA) ; scanning electron microscope ; raw materials ; resource technology ; granular material ; petrology ; n/a ; thema EDItEUR::G Reference, Information and Interdisciplinary subjects::GP Research and information: general
    Sprache: Englisch
    Format: application/octet-stream
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    E-BOOK
  • 9
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    Quartzite procurement in conglomerates and deposits: Geoarchaeological characterization of potential catchment areas in the central part of the Cantabrian Region, Spain (2021)
    Details
    Publikationsdatum: 2021-07-20
    Beschreibung: Raw material characterization in Paleolithic archaeology has widened our knowledge of Middle Paleolithic societies. Procurement of raw material, specifically flint, has allowed the tracing of the mobility of both stones and people, as well as selective processes to obtain specific types or even extraction activities. The analysis of quartzite has also developed in recent years, providing an opportunity to better understand prehistoric societies. This study characterizes the procurement strategies implemented by Middle Paleolithic people in the mountainous region of the Picos de Europa. To this end, we present a comprehensive characterization of potential catchment areas: massive outcrops, conglomerates, and river deposits. The exploitation of quartzite at the sites of El Habario and El Arteu allows us to understand the territorial management of this mountainous area through the combination of selective processes and mobility mechanisms in lower and middle altitudes. These perspectives enable us to view the mountainous region not as a barrier but as an environmental mosaic managed by Middle Paleolithic groups. This study shows strategies that bring together direct and embedded procurement based on both intensive and extensive searches. These discourses are more closely related to the daily life of people than those only considering the mobility of people and objects.
    Beschreibung: A comprehensive geoarchaeological research project based on the integration of a geographic information system, field survey, stereomicroscopy, and thin‐section petrography, is presented to characterize potential procurement areas of quartzite. The application of this methodology in the Deva, Cares, and Güeña valleys and in three different geological contexts; massive outcrops, conglomerates, and secondary deposits, suggest potential acquisition processes of lithic resources. The analysis of the quartzite assemblages of El Habario and El Arteu unveils complex management of terrain based on a mobility mechanism that connects middle altitude plateaus with open and lower river valleys, as well as intensive and extensive procurement mechanisms of raw material.
    Beschreibung: Education Department of the Government of the Basque Country
    Beschreibung: The Spanish Ministry of Science Project
    Beschreibung: The Consolidated Research Group in Prehistory of the Basque Country University
    Schlagwort(e): 552.4 ; Cantabrian Region ; field survey ; Middle Paleolithic ; petrology ; quartzite ; raw material procurement
    Materialart: article
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    CITATION GEO-LEO
  • 10
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    The Holocene volcanism at El Hierro: insights from petrology and geochemistry (2020)
    Sociedad Geológica de España
    Details
    Publikationsdatum: 2021-01-27
    Beschreibung: The Holocene volcanism at El Hierro consists of basaltic monogenetic volcanic fields associated with o the three rift systems present in this island. In this work we report preliminary petrological and geochemical data of Holocene lava flows belonging to the WNW-striking rift. Sampling was focused in three zones: Orchilla, Verodal-Sabinosa, and Tanganasoga. Petrography of the studied lavas shows that they are homogeneous. All samples are porphyritic with macrocrysts of clinopyroxene and olivine immersed in a groundmass formed by microcrysts of plagioclase, Fe-Ti oxides and clinopyroxene. Clinopyroxenes are diopsides, olivines have forsterite contents ranging from 74 to 84 % and anorthite in plagioclase varies from 66 to 76% (labradorite). Whole-rock geochemical results evidence that all magmas are basic in composition, ranging from picrobasalts to phonotephrites. Major, trace elements and isotope support fractional crystallization as the main process of magma evolution. However, petrography and chemistry of clinopyroxene cores agree with a xenocrystic nature of some of them. We suggest that these clinopyroxene cores crystallized from a genetically related magma and subsequently were entrapped or cannibalized by the basic rising magmas.
    Beschreibung: Published
    Beschreibung: 35-38
    Beschreibung: 2V. Struttura e sistema di alimentazione dei vulcani
    Beschreibung: N/A or not JCR
    Schlagwort(e): El Hierro, Holocene ; volcanism ; petrology ; geochemistry
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 11
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    Magma storage and ascent during the largest eruption of Somma-Vesuvius volcano: Pomici di Base (22 ka) Plinian event (2020)
    Details
    Publikationsdatum: 2020-05-05
    Beschreibung: The reconstruction of the pre-eruptive storage conditions as well as syn-eruptive magma ascent dynamics of past eruptions is of fundamental importance to decipher the relationship between surface-monitored signals and the sub-volcanic processes in order to learn more about the eruptive behaviour of active volcanoes. The Pomici di Base Plinian eruption is the first (22 ka) and largest (〉 4.4 km3 ) event of the SommaVesuvius volcanic complex. Here we present the preliminary results of a geochemical, isotopic, two-dimensional and three-dimensional textural study performed on volcanic products emitted during the Plinian phase of this eruptive event with the aim to reconstruct in more details the magmatic evolution of this large caldera-forming eruption. Particularly, it was fed by chemically and thermally zoned magmas extracted from a crystal mush zone in a magma chamber with top at ~4.5 km depth. During this eruption, crustal (limestone) contamination and subsequent CO2 emissions as well as changes in degassing mechanisms mainly controlled the eruptive dynamics.
    Beschreibung: Published
    Beschreibung: 23-40
    Beschreibung: 4V. Processi pre-eruttivi
    Beschreibung: JCR Journal
    Schlagwort(e): Somma-Vesuvius, Plinian eruptions, magma storage and ascent. ; petrology
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 12
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    Data from the German Continental Deep Drilling Project (KTB, Kontinentale Tiefbohrung) (2020)
    GFZ Data Services
    Details
    Publikationsdatum: 2022-08-26
    Beschreibung: Abstract
    Beschreibung: This data collection provides digital access to data and publications of the KTB (German Continental Deep Drilling Program) project. KTB was a very detailed, long-term Earth science investigation on the structure, dynamics and formation of the Central European crust in Northeastern Bavaria, Germany (Harms, Kück 2016). With geophysical sounding and ultra-deep drilling it elucidated a crustal block at the border of a micro-continental collision zones amalgamated during the Caledonian and Variscan orogenies. Major research themes were: i) the nature of geophysical structures and phenomena, ii) the crustal stress field and the brittle-ductile transition, iii) the thermal structure of the crust, iv) crustal fluids and transport processes, and v) structure and evolution of the central European Variscan basement. KTB started in 1982 with pre-site selection studies and scientific objective definition followed in 1985 by site selection studies including shallow boreholes. From 1987 to 1990 a pilot borehole of 4000 m depth was drilled and fluid tests and borehole studies were conducted. In 1990 started drilling of a so-called superdeep main borehole of 9101 m depth that was reached in 1994. Again, the final drilling phase was concluded with large-scale fluid and seismic experiments. The rocks drilled comprise metamorphic series of mafic volcanic, volcano-clastics as well as minor gabbroic to ultramafic rocks that are intercalated with leucocratic meta-sedimentary gneisses. They represent most likely a deeply subducted accretionary wedge mélange with a complex P-T-t history. The undisturbed bottom hole temperature is ~265°C. Among the outstanding results are the following: (1) A continuous profile of the complete stress tensor was obtained. (2) Several lines of evidence indicate that KTB reached the present-day brittle-ductile transition. (3) The drilled crustal segment is distinguished by large amounts of free fluids down to mid-crustal levels. (4) The role of post-orogenic brittle deformation had been grossly underestimated. (5) Steep-angle seismic reflection surveys depict the deformation pattern of the upper crust. (6) High-resolution seismic images of the crust can be obtained with a newly developed technique of true-amplitude prestack depth migration. (7) The electrical behavior of the crust is determined by secondary graphite (+/-sulfides) in shear zones. (after Emmermann und Lauterjung (1997)
    Beschreibung: Other
    Beschreibung: The data are ordered according to disciplines, wells and working groups and currently available via the original KTB site (https://data.icdp-online.org/sites/ktb/welcome.html). The DOI-referenced data publication of KTB data is in progress. Scientific disciplines: Borehole Measurements Geology, Petrology, Tectonics - Microscopy - Lithological description of cores - Lithological description of cuttings - Tectonic elements Geochemistry - Gas analysis - XRF, XRD analysis - Infrared Spectrometry - IC, ICP-AES Petrophysics - Density - Porosity - Electrical resistivity - Natural gamma-ray activity - Inner surface - Permeability - Relaxation - Magnetic susceptibility - Ultrasonic seismics - Thermal conductivity Rock Mechanics - Compressive strength - Tensile strength Technical drilling parameter Fluid/Hydraulic experiments Hydrofrac/Seismic experiments
    Schlagwort(e): German Continental Deep Drilling Program ; KTB ; Bavaria ; Windischeschenbach ; field laboratory ; downhole logging unit ; geology ; petrology ; tectonics ; geochemistry ; petrophysics ; rock mechanics ; borehole measurements ; drilling engineering ; final experiments ; hydrolaulic tests ; presite surveys ; dekorp iso89 ; EARTH SCIENCE 〉 SOLID EARTH 〉 EARTH GASES/LIQUIDS ; EARTH SCIENCE 〉 SOLID EARTH 〉 GEOCHEMISTRY ; EARTH SCIENCE 〉 SOLID EARTH 〉 GEOMAGNETISM ; EARTH SCIENCE 〉 SOLID EARTH 〉 ROCKS/MINERALS/CRYSTALS ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS ; In Situ/Laboratory Instruments 〉 Corers
    Materialart: Collection , Collection
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    DATEN GFZ
  • 13
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    Space-Time Evolution of Magma Storage and Transfer at Mt. Etna Volcano (Italy): The 2015-2016 Reawakening of Voragine Crater (2018)
    Wiley Periodicals, Inc.
    Details
    Publikationsdatum: 2019-03-26
    Beschreibung: The eruptions of December 2015 and May 2016 at Voragine crater were among the most explosive recorded during the last two decades at Mt. Etna volcano. Here we present data coming from geophysics (infrasound, LP, VLP, volcanic tremor, VT earthquakes, and ground deformations) and petrology (textural and microanalytical data on plagioclase and olivine crystals) to investigate the preeruptive magma storage and transfer dynamics leading to these exceptional explosive eruptions. Integration of all the avail- able data has led us to constrain chemically, physically, and kinetically the environments where magmas were stored before the eruption, and how they have interacted during the transfer en-route to the surface. Although the evolution and behavior of volcanic phenomena at the surface was rather similar, some differ- ences in storage and transfer dynamics were observed for 2015 and 2016 eruptions. Specifically, the 2015 eruptions have been fed by magmas stored at shallow levels that were pushed upward as a response of magma injections from deeper environments, whereas evidence of chemical interaction between shallow and deep magmatic environments becomes more prominent during the 2016 eruptions. Main findings evidence the activation of magmatic environments deeper than those generally observed for other recent Etnean eruptions, with involvement of deep basic magmas that were brought to shallow crustal levels in very short time scales (~1 month). The fast transfer from the deepest levels of the plumbing system of basic, undegassed magmas might be viewed as the crucial triggering factor leading to development of exceptionally violent volcanic phenomena even with only basic magma involved.
    Beschreibung: Programma Nazionale Ricerche . Grant Number: PNRA14_00011 University of Catania FIR 2014 . Grant Numbers: 2F119B , PRA 2016‐18 , 22722132120
    Beschreibung: Published
    Beschreibung: 471–495
    Beschreibung: 4V. Processi pre-eruttivi
    Beschreibung: JCR Journal
    Schlagwort(e): Etna ; geophysics ; petrology ; 04.08. Volcanology
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 14
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    Phase Equilibria of Pantelleria Trachytes (Italy): Constraints on Pre-eruptive Conditions and on the Metaluminous to Peralkaline Transition in Silicic Magmas (2018)
    Oxford University Press
    Details
    Publikationsdatum: 2018-09-20
    Beschreibung: The relationships between trachytes and peralkaline rhyolites (i.e. pantellerites and comendites), which occur in many continental rift systems, oceanic islands and continental intraplate settings, is unclear. To fill this gap, we have performed phase equilibrium experiments on two representative metaluminous trachytes from Pantelleria to determine both their pre-eruptive equilibration conditions (pressure, temperature, H2O content and redox state) and liquid lines of descent. Experiments were performed in the temperature range 750–950 C, pressure 0 5–1 5 kbar and fluid saturation conditions with XH2O [¼H2O/(H2OþCO2)] ranging between zero and unity. Redox conditions were fixed below the nickel–nickel oxide buffer (NNO). The results show that at 950 C and melt water contents (H2Omelt) close to saturation, trachytes are at liquidus conditions at all pressures. Clinopyroxene is the liquidus phase, being followed by iron-rich olivine and alkali feldspar. Comparison of experimental and natural phases (abundances and compositions) yields the following pre-eruptive conditions: P¼160 5 kbar, T¼925625 C, H2Omelt¼261wt %, and fO2 between NNO– 0 5 and NNO– 2. A decrease in temperature from 950 C to 750 C, as well as of H2Omelt, promotes a massive crystallization of alkali feldspar to over 80 wt %. Iron-bearing minerals show gradual iron enrichment when T and fO2 decrease, trending towards the compositions of the phenocrysts of natural pantellerites. Despite the metaluminous character of the bulk-rock compositions, residual glasses obtained after 80 wt % crystallization evolve toward comenditic compositions, owing to profuse alkali feldspar crystallization, which decreases the Al2O3 of the melt, leading to a consequent increase in the peralkalinity index [PI¼molar (Na2OþK2O)/Al2O3]. This is the first experimental demonstration that peralkaline felsic derivatives can be produced by low-pressure fractional crystallization of metaluminous mafic magmas. Our results show that the pantelleritic magmas of basalt–trachyte–rhyolite igneous suites require at least 95 wt % of parental basalt crystallization, consistent with trace element evidence. Redox conditions, through their effect on Fe–Ti oxide stabilities, control the final iron content of the evolving melt.
    Beschreibung: Published
    Beschreibung: 559- 588
    Beschreibung: 2V. Struttura e sistema di alimentazione dei vulcani
    Beschreibung: JCR Journal
    Schlagwort(e): peralkaline silicic magmatism ; Pantelleria ; Green Tuff ; petrology
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: article
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  • 15
    Unbekannt
    Unterwegs – Mobiles Leben in der Erdgas- und Erdölindustrie in Russlands Arktis (2016)
    Wien, Köln, Weimar : Böhlau
    Details
    Schlagwort(e): Crude oil ; natural gas ; Russia ; Siberia ; Arctic ; long-distance commuting (LDC) ; fly-in/fly-out (FIFO) ; mobility ; normality ; multi-locality ; Erdöl ; Erdgas ; Russland ; Sibirien ; Arktis ; Fernpendleln ; Mobilität ; Normalität ; Multilokalität
    Beschreibung / Inhaltsverzeichnis: Nahezu unbekannt sind der Öffentlichkeit die Lebensweisen jener ArbeiterInnen, die das „schwarze und blaue Gold“ für den Export nach Europa fördern. Sie sind fahrende und fliegende Menschen, die zyklisch für Wochen oder Monate in den Fördergebieten leben und arbeiten, um wieder für eine Weile zu ihren Familien heimzukehren. Das Buch führt kurzweilig von der Wolgaregion in das subarktische Sibirien. Die Autorin begleitet fernpendelnde Menschen über Tausende von Kilometern. Sie erzählt vom Leben in der sogenannten „Russischen Erdgashauptstadt“ Novy Urengoy, das sich zwischen Erinnerungen an die Sowjetunion und staatsnahen sowie neoliberalen Wirtschaftspraktiken abspielt. Diese faszinierende Ethnographie gibt einen kritischen Einblick in die russische Petroleumindustrie.
    Seiten: Online-Ressource (206 Seiten)
    ISBN: 9783205796947
    URL: http://www.boehlau-verlag.com/978-3-205-79694-7.html
    Sprache: Deutsch
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    E-BOOK
  • 16
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    The 2010 explosive eruption of Java's Merapi volcano—A ‘100-year’ event (2015)
    Details
    Publikationsdatum: 2022-06-09
    Beschreibung: Merapi volcano (Indonesia) is one of the most active and hazardous volcanoes in the world. It is known for frequent small to moderate eruptions, pyroclastic flows produced by lava dome collapse, and the large population settled on and around the flanks of the volcano that is at risk. Its usual behavior for the last decades abruptly changed in late October and early November 2010, when the volcano produced its largest and most explosive eruptions in more than a century, displacing at least a third of a million people, and claiming nearly 400 lives. Despite the challenges involved in forecasting this ‘hundred year eruption’, we show that the magnitude of precursory signals (seismicity, ground deformation, gas emissions) was proportional to the large size and intensity of the eruption. In addition and for the first time, near-real-time satellite radar imagery played an equal role with seismic, geodetic, and gas observations in monitoring eruptive activity during a major volcanic crisis. The Indonesian Center of Volcanology and Geological Hazard Mitigation (CVGHM) issued timely forecasts of the magnitude of the eruption phases, saving 10,000–20,000 lives. In addition to reporting on aspects of the crisis management, we report the first synthesis of scientific observations of the eruption. Our monitoring and petrologic data show that the 2010 eruption was fed by rapid ascent of magma from depths ranging from 5 to 30km. Magma reached the surface with variable gas content resulting in alternating explosive and rapid effusive eruptions, and released a total of ~0.44Tg of SO2. The eruptive behavior seems also related to the seismicity along a tectonic fault more than 40km from the volcano, highlighting both the complex stress pattern of the Merapi region of Java and the role of magmatic pressurization in activating regional faults. We suggest a dynamic triggering of the main explosions on 3 and 4 November by the passing seismic waves generated by regional earthquakes on these days.
    Beschreibung: Published
    Beschreibung: 121–135
    Beschreibung: 5V. Sorveglianza vulcanica ed emergenze
    Beschreibung: JCR Journal
    Beschreibung: restricted
    Schlagwort(e): Merapi ; SAR change detection ; eruption monitoring ; petrology ; satellite monitoring ; volcano tremors ; 04. Solid Earth::04.08. Volcanology::04.08.01. Gases ; 04. Solid Earth::04.08. Volcanology::04.08.03. Magmas ; 04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring ; 04. Solid Earth::04.08. Volcanology::04.08.07. Instruments and techniques
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 17
    Unbekannt
    Petrology : New Perspectives and Applications (2012)
    Rijeka : InTech
    Details
    Schlagwort(e): petrology ; geology ; geophysics
    Beschreibung / Inhaltsverzeichnis: Petrology, New Perspectives and Applications is designed for advanced graduate courses and professionals in petrology. The book includes eight chapters that are focused on the recent advances and application of modern petrologic and geochemical methods for the understanding of igneous, metamorphic and even sedimentary rocks. Research studies contained in this volume provide an overview of application of modern petrologic techniques to rocks of diverse origins. They reflect a wide variety of settings (from South America to the Far East, and from Africa to Central Asia) as well as ages ranging from late Precambrian to late Cenozoic, with several on Mesozoic/Cenozoic volcanism.
    Seiten: Online-Ressource (224 Seiten)
    ISBN: 9789533078007
    URL: http://www.intechweb.org/books/show/title/petrology-new-perspectives-and-applications
    Sprache: Englisch
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    E-BOOK
  • 18
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    Enclaves provide new insights on the dynamics of magma mingling: a case study from Salina Island (Southern Tyrrhenian Sea, Italy) (2007)
    Elsevier
    Details
    Publikationsdatum: 2017-04-04
    Beschreibung: Three lava flows (hereafter, flows A, B, and C) from Salina Island (Italy) consist of basaltic andesitic enclaves dispersed in a dacitic matrix. Enclaves represent 8–12 vol.% of the erupted magma. The number of enclaves and the surface covered by the enclaves at each outcrop do not vary significantly with the distance from the vent in the flows A and B. These feature reflect the dynamics of magma mingling within the reservoir and not the kinematics of the lava flow. In the flow C, these parameters vary irregularly. The statistical entropy S(t) of the enclaves, which is a measure of their spatial distribution (dispersion), is estimated in outcrops located at different distance from the vent. The Kolmogorov–Sinai entropy rate k, which describes the variations of S(t) with time, is also determined. In the lava flow A, S(t) increases linearly with time t for 0btb0.4; k is 0.04. For tN0.5, S(t) attains its maximum value and maintains constant with increasing t. In the lava flow B, S(t) linearly increases with t, and k is 0.01. In the lava flow C, there is not correlation between S(t) and t. The comparison between the results from the analysis of the Porri enclaves and those from numerical experiments on the variation of S(t) in chaotic advective mixing systems and from previous experimental models on magma mixing, allow us to draw some conclusions on dynamics of the basaltic andesite– dacite mingling in the magma chamber. Fully chaotic magma mingling systems show three evolution stages. An initial stage, which is unknown because of the disruption of the initial configuration of the interacting magmas, a second stage characterized by a linear increase of the statistical entropy with time, and a third stage, in which the uniformity of the system is reached, and the entropy does not vary with increasing time. A system in which the uniformity is never attained, is characterized by irregular variations of S(t) with time. In the flows A and B, the relations between S(t) and t are consistent with those of a fully chaotic dynamics possibly associated to convection. The basaltic andesite was uniformly distributed in the dacitic host due to the occurrence of convective movements driven by the injection of the basaltic andesite within the dacitic chamber. The mingling system recorded by the lava flow A evolved with a higher rate with respect to that of the flow B. This suggests that chaotic advection (stirring and folding) is more efficient in the magmatic system A than in B. On the contrary, the mingling system C is characterized by a non-uniform distribution of the basaltic andesite within dacite. This reflects the occurrence of a dynamics in which stirring and folding processes do not operate efficiently and are unable to uniformly distribute the dispersed phase within the continuous one. The decrease of k from A to B, and the lack of a measurable k in C, along with the observation that A and B were emitted before C, indicate that the efficiency of advective movements within the Porri magma chamber declined with decreasing time. Mingled magmas characterized by a homogeneous spatial distribution of enclaves or an initially inhomogeneous distribution evolving towards a homogeneous one are indicative of efficient advection processes that may favor magma mixing. Mingled magmas characterized by an inhomogeneous distribution of enclaves suggest low dynamical interaction between the two end-members. Magma mixing is not allowed.
    Beschreibung: Published
    Beschreibung: 128–140
    Beschreibung: JCR Journal
    Beschreibung: reserved
    Schlagwort(e): volcanology ; petrology ; magma mingling ; enclaves ; lava flows ; entropy ; 04. Solid Earth::04.08. Volcanology::04.08.03. Magmas
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 19
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    Gemmology, geology and origin of the Sandawana emerald deposits, Zimbabwe (2006)
    In:  Scripta Geologica (0375-7587) vol.131 (2006) p.1
    Details
    Publikationsdatum: 2007-01-09
    Beschreibung: As one of the most valuable gemstones, emeralds are known to occur in several countries of the world, such as Colombia, Zambia, Brazil, Pakistan, Afghanistan, Russia, Madagascar and Zimbabwe. The emerald deposits at Sandawana, Zimbabwe, are described, the emeralds from this deposit characterised and a model of emerald formation presented; this is compared with existing models. The emeralds from Sandawana, Zimbabwe, show relatively constant physical properties, with high refractive indices and specific gravities. They are characterized by laths and fibres of amphibole, both actinolite and cummingtonite. Other common inclusions are albite and apatite. Rare, opaque and chromium-rich inclusions constitute a new variety of ilmenorutile. Compared to emeralds from most other localities, fl uid inclusions are rare and small. Sandawana emeralds have very high contents of chromium, sodium, magnesium, lithium and caesium. They can be readily separated from emeralds from most other localities by using traditional gem testing techniques, on the basis of a combination of physical properties, inclusions and chemistry. In cases of possible doubt, such as in comparison with emeralds from Rajasthan (India), the use of oxygen isotopes is helpful. Sandawana emeralds occur at the contact between greenstones of the Mweza Greenstone Belt (MGB) and pegmatite intrusions. Rare-element granitic pegmatites intruded the MGB just prior to and/or during a main deformation event at 2.6 Ga, at the southern border of the Zimbabwe craton. Subsequently, a late-stage Na-rich ‘solution-melt’ containing F, P, Li, Be and Cr was injected along shear zones, causing albitisation of the pegmatite and phlogopitization in the greenstone wall-rock. Coeval ductile deformation is indicated by boudinage, pinch-and-swell and folding of pegmatites, by differentiated layering in associated amphibole-phlogopite schist and by the presence of (micro)shear zones. The synkinematic growth of not only phlogopite, but also emerald, fl uorapatite, holmquistite and chromian ilmenorutile, indicates enrichment of Na, K, Li, Be, F, P, Rb, Cs, Ta and Nb in the emerald-bearing shear zone. This suggests that emerald formation is closely related to syntectonic K-Na metasomatism. In this process, microcline, oligoclase, quartz (from the pegmatite) and chlorite (from the greenstones) were consumed, in favour of albite (in the pegmatite), phlogopite, some new actinolite and cummingtonite, holmquistite, fl uorapatite and emerald (at the contact and in the greenstone). Mass balance calculations indicate that a Na- and F-rich hydrous fl uid must have been involved in the alterations that ultimately caused emerald formation. The presence of small, isolated, highly saline brine inclusions in emerald supports this result. Formation of gem-quality emerald occurred in relatively low-pressure domains, such as ‘traps’ under folded pegmatite or pinch areas near pegmatites with pinch-and-swell or boudin structures. Apatite-phlogopite thermometry gives T = 560-650°C, interpreted as the temperature range at which emerald was formed. These temperatures imply contact metamorphic rather than regional metamorphic conditions. From the general conditions of primary consolidation of rare element pegmatites, and from the inferred crystallisation path of the similar Bikita pegmatite, a corresponding pressure of around 2.5-3 kbar appears plausible at Sandawana. Because of the intimate spatial and temporal relationship with magmatic activity, the pegmatitic/hydrothermal nature of the involved fl uid, and the near magmatic temperatures of phlogopite and apatite formation, a magmatic source for the Na-rich fl uids is very likely. It means that intrusion of the pegmatites, and subsequent albitisation and metasomatism during deformation, have been part of a continuous process in a restricted period of time. The Sandawana data lead to a new model of emerald formation, as a product of contact metasomatism at the border of ultramafic rocks and rare-element pegmatites during a deformation event, involving late stage magmatic/hydrothermal activity channelled by shearing. Hence, Sandawana emeralds were formed in the Late Archaean, around 2.6 Ga, at the border of a major Late Archaean suture zone. As a consequence, they are by far the oldest, compared to other commercially available emeralds. 40Ar/39Ar dates, varying from 1900 to 2400 Ma, are interpreted as Archaean ages that became partially to completely reset during a Proterozoic thermal overprint. The Sandawana model for emerald genesis does not fit into any of the genetic classification schemes proposed in the literature, and shows that no single theory can be applied to all schist-type deposits. Emeralds of gem quality can be formed in very different geological settings, as long as basic conditions are fulfilled. In this respect, the following factors are essential: availability of beryllium and chromium (± vanadium); means of transport to bring the elements together, that is, fl uids of magmatic, hydrothermal, metamorphic or a combined origin; conditions in which emerald may form as a stable mineral, with temperatures generally from 600° down to 300°C; and sufficient space to grow transparent and well-formed crystals.
    Schlagwort(e): Emerald ; Sandawana ; Zimbabwe ; gemmology ; petrology ; geothermometry ; geochronology ; 38.30
    Repository-Name: National Museum of Natural History, Netherlands
    Materialart: Article / Letter to the editor
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  • 20
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    Gemmology, geology and origin of the Sandawana emerald deposits, Zimbabwe (2006)
    In:  Scripta Geologica vol. 131, pp. 1-212
    Details
    Publikationsdatum: 2024-01-12
    Beschreibung: As one of the most valuable gemstones, emeralds are known to occur in several countries of the world, such as Colombia, Zambia, Brazil, Pakistan, Afghanistan, Russia, Madagascar and Zimbabwe. The emerald deposits at Sandawana, Zimbabwe, are described, the emeralds from this deposit characterised and a model of emerald formation presented; this is compared with existing models. \nThe emeralds from Sandawana, Zimbabwe, show relatively constant physical properties, with high refractive indices and specific gravities. They are characterized by laths and fibres of amphibole, both actinolite and cummingtonite. Other common inclusions are albite and apatite. Rare, opaque and chromium-rich inclusions constitute a new variety of ilmenorutile. Compared to emeralds from most other localities, fl uid inclusions are rare and small. Sandawana emeralds have very high contents of chromium, sodium, magnesium, lithium and caesium. They can be readily separated from emeralds from most other localities by using traditional gem testing techniques, on the basis of a combination of physical properties, inclusions and chemistry. In cases of possible doubt, such as in comparison with emeralds from Rajasthan (India), the use of oxygen isotopes is helpful.\nSandawana emeralds occur at the contact between greenstones of the Mweza Greenstone Belt (MGB) and pegmatite intrusions. Rare-element granitic pegmatites intruded the MGB just prior to and/or during a main deformation event at 2.6 Ga, at the southern border of the Zimbabwe craton. Subsequently, a late-stage Na-rich \xe2\x80\x98solution-melt\xe2\x80\x99 containing F, P, Li, Be and Cr was injected along shear zones, causing albitisation of the pegmatite and phlogopitization in the greenstone wall-rock. Coeval ductile deformation is indicated by boudinage, pinch-and-swell and folding of pegmatites, by differentiated layering in associated amphibole-phlogopite schist and by the presence of (micro)shear zones. The synkinematic growth of not only phlogopite, but also emerald, fl uorapatite, holmquistite and chromian ilmenorutile, indicates enrichment of Na, K, Li, Be, F, P, Rb, Cs, Ta and Nb in the emerald-bearing shear zone. This suggests that emerald formation is closely related to syntectonic K-Na metasomatism. In this process, microcline, oligoclase, quartz (from the pegmatite) and chlorite (from the greenstones) were consumed, in favour of albite (in the pegmatite), phlogopite, some new actinolite and cummingtonite, holmquistite, fl uorapatite and emerald (at the contact and in the greenstone). Mass balance calculations indicate that a Na- and F-rich hydrous fl uid must have been involved in the alterations that ultimately caused emerald formation. The presence of small, isolated, highly saline brine inclusions in emerald supports this result. Formation of gem-quality emerald occurred in relatively low-pressure domains, such as \xe2\x80\x98traps\xe2\x80\x99 under folded pegmatite or pinch areas near pegmatites with pinch-and-swell or boudin structures.\nApatite-phlogopite thermometry gives T = 560-650\xc2\xb0C, interpreted as the temperature range at which emerald was formed. These temperatures imply contact metamorphic rather than regional metamorphic conditions. From the general conditions of primary consolidation of rare element pegmatites, and from the inferred crystallisation path of the similar Bikita pegmatite, a corresponding pressure of around 2.5-3 kbar appears plausible at Sandawana. Because of the intimate spatial and temporal relationship with\nmagmatic activity, the pegmatitic/hydrothermal nature of the involved fl uid, and the near magmatic temperatures of phlogopite and apatite formation, a magmatic source for the Na-rich fl uids is very likely. It means that intrusion of the pegmatites, and subsequent albitisation and metasomatism during deformation, have been part of a continuous process in a restricted period of time.\nThe Sandawana data lead to a new model of emerald formation, as a product of contact metasomatism at the border of ultramafic rocks and rare-element pegmatites during a deformation event, involving late stage magmatic/hydrothermal activity channelled by shearing. Hence, Sandawana emeralds were formed in the Late Archaean, around 2.6 Ga, at the border of a major Late Archaean suture zone. As a consequence, they are by far the oldest, compared to other commercially available emeralds.\n40Ar/39Ar dates, varying from 1900 to 2400 Ma, are interpreted as Archaean ages that became partially to completely reset during a Proterozoic thermal overprint. \nThe Sandawana model for emerald genesis does not fit into any of the genetic classification schemes proposed in the literature, and shows that no single theory can be applied to all schist-type deposits. Emeralds of gem quality can be formed in very different geological settings, as long as basic conditions are fulfilled. In this respect, the following factors are essential: availability of beryllium and chromium (\xc2\xb1 vanadium); means of transport to bring the elements together, that is, fl uids of magmatic, hydrothermal,\nmetamorphic or a combined origin; conditions in which emerald may form as a stable mineral, with temperatures generally from 600\xc2\xb0 down to 300\xc2\xb0C; and sufficient space to grow transparent and well-formed crystals.
    Schlagwort(e): Emerald ; Sandawana ; Zimbabwe ; gemmology ; petrology ; geothermometry ; geochronology
    Repository-Name: National Museum of Natural History, Netherlands
    Materialart: info:eu-repo/semantics/article
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  • 21
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    Wet subduction versus cold subduction (2005)
    In:  Geophys. Res. Lett., L'wiw, Inst. f. Theoret. Geodäsie, vol. 32, no. 13, pp. 383-388, pp. L13312, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 2005
    Schlagwort(e): Geochemistry ; Mineralogy ; Fluids ; Subduction zone ; Plate tectonics ; presure ; temperature ; 410 ; discontinuity ; GRL ; 1025 ; Geochemistry: ; Composition ; of ; the ; mantle ; 3630 ; Mineralogy ; and ; Petrology: ; Experimental ; mineralogy ; and ; petrology ; 3924 ; Mineral ; Physics: ; High-pressure ; behavior
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    BIBLIOGRAFIE SEISMOLOGIE
  • 22
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    Towards modern petrological collections (2004)
    In:  Scripta Geologica. Special Issue vol. 4, pp. 200-215
    Details
    Publikationsdatum: 2024-01-12
    Beschreibung: Petrological collections result from sampling for academic research, for aesthetic or commercial reasons, and to document natural diversity. Selection criteria for reducing and enhancing collections include adequate documentation, potential for future use, information density, time and money invested in specimens, and spatial and financial constraints. Application of these criteria to the voluminous (c. 300,000 samples) rock collections of the University of Amsterdam, led to partial acquisition by the Nationaal Natuurhistorisch Museum in Leiden (Naturalis) late in 2002. Selected items included: (i) historical collections; (ii) material from former overseas domains; (iii) material from poorly accessible areas; (iv) material useful for research at the museum itself; (v) non-voluminous items with high information density (thin sections) or subjected to laboratory treatment (rock powders, mineral separates); and (vi) all samples quoted in academic dissertations.\nPromotion and advertising of the newly acquired collections is expected to lead to a second life for these important academic specimens. Application of similar criteria to other museum collections will lead to partial de-accessioning, thus creating space for future acquisitions in the framework where Naturalis is increasingly regarded as the Dutch national repository of geological collections. Researchers from partner institutions will be stimulated to (de-)select their collections at the end of a project, to avoid the much higher costs of later selection by museum staff.
    Schlagwort(e): geology ; petrology ; collections ; selection ; de-selection ; de-accessioning
    Repository-Name: National Museum of Natural History, Netherlands
    Materialart: info:eu-repo/semantics/article
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  • 23
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    Subsurface geophysics of the Phlegrean Fields: New insights from downhole measurements (2003)
    In:  J. Geophys. Res., New York, Scientific American, vol. 108, no. B3, pp. ECV 7-1 - ECV 7-13, pp. 2171, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 2003
    Schlagwort(e): Borehole geophys. ; Volcanology ; 0915 ; Exploration ; Geophysics: ; Downhole ; methods ; 0910 ; Exploration ; Geophysics: ; Data ; processing ; Volcanology, ; geochemistry, ; and ; petrology ; 5102 ; Physical ; Properties ; of ; Rocks: ; Acoustic ; properties ; JGR
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    BIBLIOGRAFIE SEISMOLOGIE
  • 24
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    Physics in oil exploration (2002)
    In:  Physics Today, London, Institution of Mining and Metallurgy, vol. 55, no. 4, pp. 48-53, pp. 1869, (ISBN: 0-12-018847-3)
    Details
    Publikationsdatum: 2002
    Beschreibung: Petroleum engineers use a variety of physical techniques to find and exploit petroleum reservoirs in increasingly remote and complicated geological environments.
    Schlagwort(e): Applied geophysics ; Borehole geophys. ; NMR ; MWD ; Seismics (controlled source seismology) ; neutron ; gamma ; ray ; spectroscopy ; petrology ; Physical properties of rocks ; Review article
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  • 25
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    Exhumation rates of high pressure metamorphic rocks in subduction channels: the effect of rheology (2002)
    In:  Tectonics, Regensburg, Inst. Electrical & Electronics Engineers, vol. 21, no. 6, pp. 6-1 to 6-19, pp. 1056, (ISBN: 0534351875, 2nd edition)
    Details
    Publikationsdatum: 2002
    Schlagwort(e): Tectonics ; Subduction zone ; Rheology ; pTt-path ; 3210 ; Mathematical ; Geophysics: ; Modeling ; 3660 ; Mineralogy, ; Petrology, ; and ; Mineral ; Physics: ; Metamorphic ; petrology ; 8150 ; Tectonophysics: ; Plate ; boundary--general ; (3040) ; 8045 ; Structural ; Geology: ; Role ; of ; fluids ; 5120 ; Physical ; Properties ; of ; Rocks: ; Plasticity, ; diffusion, ; and ; creep ; Stoeckhert ; Stockhert ; Structural geology ; Mineralogy ; Physical properties of rocks
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  • 26
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    Evidence suggests slab melting in arc magmas (2001)
    In:  Eos, Trans., Am. Geophys. Un., London, Army Corps of Engineers, Woodward-Clyde Consultants, vol. 82, no. 6, pp. 65, 68-69, pp. 1062, (ISBN: 0-12-018847-3)
    Details
    Publikationsdatum: 2001
    Schlagwort(e): Volcanology ; Mineralogy ; petrology ; Adaktite ; Subduction zone ; MORB
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  • 27
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    Methodology for global geodetic time series estimation: A new tool for geodynamics (2000)
    In:  J. Geophys. Res., London, Army Corps of Engineers, Woodward-Clyde Consultants, vol. 105, no. B5, pp. 11083-11100, pp. 1013, (ISBN: 0-12-018847-3)
    Details
    Publikationsdatum: 2000
    Beschreibung: A method of automatically combining geodetic network solutions to produce station coordinate time series with realistic computed errors has been developed and tested and is being applied on a weekly basis to Global Positioning System (Global Positioning System) global and regional networks of the International Global Positioning System Service. Our techniques include modified Helmert blocking, stochastic modeling to minimize frame bias, Monte Carlo simulation, variance component estimation, and multiparameter data snooping. An 18-month time series evaluation of 150 globally distributed stations demonstrates that our combined weekly solution is more complete, precise, and reliable than any contributing solution. Our method of attaching regional networks without perturbing the global network solution, rather than combining normal equations, improves the quality measures. The median RMS of station position residuals with respect to a constant velocity model is 2.4 mm in latitude, 3.0 mm in longitude, and 7.2 mm in height. Our solution has since been incorporated into the reference frame ITRF96 (International Terrestrial Reference Frame 1996), showing a RMS coordinate difference of 5.4 mm, the lowest of all contributing solutions. As an independent test, the RMS difference with the ITRF94 is 4.5 mm in horizontal and 8.1 mm in height. As a second external test, the station velocity solution was used to estimate plate tectonic Euler vectors, which were then compared with the NUVEL-1A model and found to differ at a level consistent with the computed errors. Given a few more years of data, our error model predicts solutions that will be sufficiently precise to rigorously test NUVEL-1A or its successors
    Schlagwort(e): Strain ; Time series analysis ; Geodesy ; Crustal deformation (cf. Earthquake precursor: deformation or strain) ; Plate tectonics ; map ; Paleomagnetism ; JGR ; 1503 ; Geomagnetism ; and ; Paleomagnetism: ; Archeomagnetism ; 1519 ; Magnetic ; mineralogy ; and ; petrology ; 1521 ; Paleointensity ; 1540 ; Rock ; and ; mineral ; magnetism
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  • 28
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    Seismic and aseismic slip indicators in serpentinite gouge (2000)
    In:  Geology, Tübingen, Univ. Calif. Publ., vol. 28, no. 2, pp. 135-138, pp. B05411, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 2000
    Beschreibung: Structures observed within experimentally deformed serpentinite gouges provide information that may be used to identify the seismic behavior of natural fault zones. In laboratory friction experiments serpentinite exhibits two modes of behavior: one can only result in stable fault creep, and the other may result in stable slip, but has the potential for earthquakes. The microstructures that form during these experiments reflect the deformation style of the serpentinite: distributed deformation results from aseismic fault creep, and localized deformation results from conditions favorable for seismic slip. Distributed deformation produces a crystallographic preferred orientation of the serpentine grains (S foliation). Localized deformation forms Riedel shears. Similar structures occur within a natural serpentinite shear zone from Monterey County, California, and suggest a history of stable fault creep with intermittent seismic events.
    Schlagwort(e): Friction ; Laboratory measurements ; petrology ; Rock mechanics
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  • 29
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    Unbekannt
    Lexikon der Geowissenschaften (2000)
    Spektrum Akadem. Verlag
    In:  Heidelberg, Spektrum Akadem. Verlag, vol. 34, no. 22, pp. 65-70, (ISBN 0-691-12183-4, 2005 (481 pp. + CD-ROM))
    Details
    Publikationsdatum: 2000
    Schlagwort(e): Handbook of geophysics ; Handbook of geology ; Handbook of mineralogy ; remote ; sensing ; geography ; petrology ; Handbook of geodesy ; Geochemistry ; Fernerkundung ; Kartographie ; BIBTEX?
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  • 30
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    Topography of the transition zone seismic discontinuities (2000)
    In:  Rev. Geophys., Luxembourg, Conseil de l'Europe, vol. 38, no. 1, pp. 141-158, pp. 1484, (ISSN 0343-5164)
    Details
    Publikationsdatum: 2000
    Schlagwort(e): Earth model, also for more shallow analyses ! ; Seismology ; 410 ; 660 ; earth mantle ; Subduction zone ; Waves ; Wave propagation ; 3630 ; Mineralogy ; petrology ; rock ; chemistry ; Experimental ; mineralogy ; and ; petrology ; 3939 ; Mineral ; physics ; Physical ; thermodynamics ; 7203 ; Seismology ; Body ; wave ; propagation ; 8124 ; Tectonophysics ; Earth's ; interior--composition ; and ; state ; (old ; 8105)
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  • 31
    Digitale Medien
    Digitale Medien
    Submersible observations of Equatorial Atlantic mantle: The St. Paul Fracture Zone region (2000)
    Springer
    Marine geophysical researches 21 (2000), S. 529-560 
    Details
    ISSN: 1573-0581
    Schlagwort(e): Structure ; morphology ; petrology ; peridotite-basalt
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract The St. Paul F.Z. is a large structural domain made up of multiple transform faults interrupted by several Intra-Transform Ridge (ITR) spreading segments. Two regions were studied in details by submersible: (1) The ITR short (〈20 km in length) segment near 0° 37′N–25° 27′W and 1° N–27° 42′W and (2) The St. Peter and St. Paul's Rocks (SPPR) massif located at 29° 25′W (¡3700 m depth). (1) The short ITR segments consist of a magma starved rift valley with recent volcanic activities at 4700 m depth. A geological profile made along the rift valley wall showed localized volcanics (basalts and dykes) which are believed to overlay and intrude the ultramafics. The geological setting and the high ultramafic/volcanic ratio suggest an extremely low magmatic supply and crustal-mantle uplift during lithospheric stretching and denudation. (2) The St. Peter and St. Paul's Rocks (SPPR) massif consists of a sigmoidal ridge within the active transform zone. The SPPR is divided into two different geological domains called the North and the South Ridges. The North Ridge consists of strongly tectonized fault scarps composed of banded and mylonitized peridotite, sporadic gabbros (3900–2500 m) and metabasalts (2700–1700 m). The South Ridge is less tectonized with undeformed, serpentinized spinel lherzolite (2000–1400 m) and basalts. Extensional motion and denudation accompanied by diapirism affected the South Ridge within a transform domain. Instead, the North Ridge was formed during an important strike-slip and faulting motion resulting in the uplifted portion of the St. Paul F.Z. transverse ridge. There is a regional compositional variation of the volcanics where E-MORBs and alkali basalts are produced on the SPPR massif and are comparable to the adjacent northern segments of the Mid-Atlantic Ridge. On the other hand, N and T- MORBs collected from the eastern part of the St. Paul F.Z. (25° 27′ W IRT) are similar to the volcanics from the southern segments of the MAR. The peridotites exposed in these provinces (SPPR and ITR) are similar in their REE and trace element distribution. Different degrees (3–15%) of partial melting of a mixed composite mantle consisting of spinel and amphibole bearing lherzolite veined with 5–40% clinopyroxenite gave rise to the observed MORBs and alkali basalts.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1004819701870
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    Volltext
  • 32
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    Dissolution and time-dependent compaction of albite sand: experiments at 100 °C and 160 °C in pH-buffered organic acids and distilled water (1999)
    In:  Tectonophys., Basel, Birkhäuser Verlag, vol. 295, no. 1, pp. 93-115, pp. B05S07, (ISBN: 0534351875, 2nd edition)
    Details
    Publikationsdatum: 1999
    Schlagwort(e): Laboratory measurements ; Fluids ; petrology
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  • 33
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    Microstructures of cataclasites in a limestone-on-shale thrust fault: implications for low-temperature recrystallization of calcite (1999)
    In:  Tectonophys., New York, Allerton Press, vol. 295, no. 1, pp. 167-186, pp. L13315, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1999
    Schlagwort(e): Fluids ; Laboratory measurements ; Friction ; Rock mechanics ; petrology
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  • 34
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    Petrographic interpretation of a complex seismic crust-mantle transition in the central-eastern Alps (1999)
    In:  Tectonophys., Amsterdam, Elsevier Science Publishers B.V., vol. 294, no. 1-2, pp. 75-88, pp. B09407, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1999
    Schlagwort(e): petrology ; Mineralogy ; Earth model, also for more shallow analyses ! ; Velocity depth profile ; EUROPROBE (Geol. and Geophys. in eastern Europe)
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  • 35
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    Discontinuous grain growth in recrystallised vein quartz - implications for grain boundary structure, grain boundary mobility, crystallographic preferred orientation, and stress history (1999)
    In:  J. Struct. Geol., Berlin, Pergamon, vol. 21, no. 10, pp. 1477-1490, pp. B04306, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1999
    Schlagwort(e): paleo ; Stress ; petrology ; Rheology ; Mineralogy ; Structural geology ; JSG
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  • 36
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    Experimentally generated normal faults in single-layer and multilayer limestone specimens at confining pressure (1999)
    In:  Tectonophys., Philadelphia, Wiley, vol. 295, no. 1, pp. 53-77, pp. L20310, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1999
    Schlagwort(e): Laboratory measurements ; petrology ; Fault zone
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  • 37
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    Seismic consequences of warm versus cool subduction metamorphism: examples from southwest and northeast Japan (1999)
    In:  Science, Basle, Wiley, vol. 286, no. 5441, pp. 937-939, pp. 1264, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1999
    Schlagwort(e): Plate tectonics ; Subduction zone ; Structural geology ; petrology ; Geothermics
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  • 38
    Unbekannt
    Biostratigraphy in Production and Development Geology (1999)
    London : The Geological Society
    Details
    Schlagwort(e): Biostratigraphie ; Erdölgeologie ; Bioestratigrafia ; Biostratigraphie ; Geology, Economic ; Geology, Stratigraphic ; Géologie économique ; Micropaleontologia ; Paleontology, Stratigraphic ; Petroleum ; Prospecting ; Prospecção geológica ; Pétrole - Géologie ; Stratigraphie
    Beschreibung / Inhaltsverzeichnis: R. W. Jones and M. D. Simmons: Preface and Introduction / Geological Society, London, Special Publications, 152:1-3, doi:10.1144/GSL.SP.1999.152.01.01 --- S. N. J. Payne, D. F. Ewen, and M. J. Bowman: The role and value of ‘high-impact biostratigraphy’ in reservoir appraisal and development / Geological Society, London, Special Publications, 152:5-22, doi:10.1144/GSL.SP.1999.152.01.02 --- S. Duxbury, D. Kadolsky, and S. Johansen: Sequence stratigraphic subdivision of the Humber Group in the Outer Moray Firth area (UKCS, North Sea) / Geological Society, London, Special Publications, 152:23-54, doi:10.1144/GSL.SP.1999.152.01.03 --- P. H. Morris, S. N. J. Payne, and D. P. J. Richards: Micropalaeontological biostratigraphy of the Magnus Sandstone Member (Kimmeridgian-Early Volgian), Magnus Field, UK North Sea / Geological Society, London, Special Publications, 152:55-73, doi:10.1144/GSL.SP.1999.152.01.04 --- D. J. Shipp: Well-site biostratigraphy of Danish horizontal wells / Geological Society, London, Special Publications, 152:75-84, doi:10.1144/GSL.SP.1999.152.01.05 --- J. A. Bergen and P. J. Sikora: Microfossil diachronism in southern Norwegian North Sea chalks: Valhall and Hod fields / Geological Society, London, Special Publications, 152:85-111, doi:10.1144/GSL.SP.1999.152.01.06 --- P. J. Sikora, J. A. Bergen, and C. L. Farmer: Chalk palaeoenvironments and depositional model, Valhall-Hod fields, southern Norwegian North Sea / Geological Society, London, Special Publications, 152:113-137, doi:10.1144/GSL.SP.1999.152.01.07 --- M. D. Bidgood, A. G. Mitlehner, G. D. Jones, and D. J. Jutson: Towards a stable and agreed nomenclature for North Sea Tertiary diatom floras — the ‘Coscinodiscus’ problem / Geological Society, London, Special Publications, 152:139-153, doi:10.1144/GSL.SP.1999.152.01.08 --- N. A. Holmes: The Andrew Formation and ‘biosteering’ — different reservoirs, different approaches / Geological Society, London, Special Publications, 152:155-166, doi:10.1144/GSL.SP.1999.152.01.09 --- G. Mangerud, T. Dreyer, L. Søyseth, O. Martinsen, and A. Ryseth: High-resolution biostratigraphy and sequence development of the Palaeocene succession, Grane Field, Norway / Geological Society, London, Special Publications, 152:167-184, doi:10.1144/GSL.SP.1999.152.01.10 --- R. W. Jones: Forties Field (North Sea) revisited: a demonstration of the value of historical micropalaeontological data / Geological Society, London, Special Publications, 152:185-200, doi:10.1144/GSL.SP.1999.152.01.11 --- D. McLean and S. J. Davies: Constraints on the application of palynology to the correlation of Euramerican Late Carboniferous clastic hydrocarbon reservoirs / Geological Society, London, Special Publications, 152:201-218, doi:10.1144/GSL.SP.1999.152.01.12 --- M. D. Simmons, M. D. Bidgood, P. Brenac, P. D. Crevello, J. J. Lambiase, and C. K. Morley: Microfossil assemblages as proxies for precise palaeoenvironmental determination — an example from Miocene sediments of northwest Borneo / Geological Society, London, Special Publications, 152:219-241, doi:10.1144/GSL.SP.1999.152.01.13 --- R. W. Jones, N. E. Jones, A. D. King, and D. Shaw: Reservoir biostratigraphy of the Pedernales Field, Venezuela / Geological Society, London, Special Publications, 152:243-257, doi:10.1144/GSL.SP.1999.152.01.14 --- J. M. Armentrout, L. B. Fearn, K. Rodgers, S. Root, W. D. Lyle, D. C. Herrick, R. B. Bloch, J. W. Snedden, and B. Nwankwo: High-resolution sequence biostratigraphy of a lowstand prograding deltaic wedge: Oso Field (late Miocene), Nigeria / Geological Society, London, Special Publications, 152:259-290, doi:10.1144/GSL.SP.1999.152.01.15 --- C. J. Van Der Zwan and W. A. Brugman: Biosignals from the EA Field, Nigeria / Geological Society, London, Special Publications, 152:291-301, doi:10.1144/GSL.SP.1999.152.01.16 --- B. J. O’Neill, A. E. DuVernay, and R. A. George: Applied palaeontology: a critical stratigraphic tool in Gulf of Mexico exploration and exploitation / Geological Society, London, Special Publications, 152:303-308, doi:10.1144/GSL.SP.1999.152.01.17
    Seiten: Online-Ressource (318 Seiten) , Illustrationen, Diagramme ; 25cm + fold out charts
    ISBN: 1862390312
    URL: http://sp.lyellcollection.org/content/152/1
    Sprache: Englisch
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  • 39
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    The 1996 Peru tsunamigenic earthquake: Broadband source process (1998)
    In:  Geophys. Res. Lett., Stuttgart, Schweizerbart'sche Verlagsbuchhandlung, vol. 25, no. 14, pp. 2691-2694, pp. L08309, (ISSN 0016-8548, ISBN 3-510-50045-8)
    Details
    Publikationsdatum: 1998
    Beschreibung: We investigate the spatio-temporal complexity of moment release of the February 21, 1996 Peru earthquake (Mw7.5). We use a non-linear source tomographic technique, based on simulated annealing, to invert surface wave source spectra for the slip distribution on a gently dipping fault plane. The spectra (5-65 mHz) are obtained using an empirical Green's function (EGF) method applied to first and second orbit fundamental mode Rayleigh waves. Spectra are well fit by a 110 km bilateral rupture, subparallel to the trench, updip of the hypocenter, with a total moment of 2.0?1020 Nm. The non-linear inversion reveals a 30x30 km 2 major slip patch south the onset, where rupture velocities attain 1.5-2.0 km/s. Inversions of teleseismic broadband P and SH waves (10-500 mHz) indicate little or no directivity, consistent with the surface wave data. The average source time functions for both the surface and body wave data are similar in shape and in duration (?50 s). Part of the slip during the 1996 Peru event occurred in a region of reduced background seismicity, as was the case for the 1992 Nicaragua slow event, suggesting that the seismogenic potential of low seismicity regions near the trench should be globally reassessed
    Schlagwort(e): Earthquake ; Tsunami(s) ; Broad-band ; Source ; GRL ; 3630 ; Mineralogy, ; Petrology, ; and ; Mineral ; Physics: ; Experimental ; mineralogy ; and ; petrology ; 3924 ; Mineral ; Physics: ; High-pressure ; behavior ; 7218 ; Seismology: ; Lithosphere ; and ; upper ; mantle ; 8124 ; Tectonophysics: ; Earth's ; interior--composition ; and ; state ; (old ; 8105)
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  • 40
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    A procedure for estimation of source and propagation amplitude corrections for regional seismic discriminants (1998)
    In:  J. Geophys. Res., London, AGU, vol. 103, no. B2, pp. 2781-2789, pp. L14317, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1998
    Schlagwort(e): Seismology ; Nuclear explosion ; Source ; Wave propagation ; Discrimination ; JGR ; 3640 ; Mineralogy, ; Petrology, ; and ; Mineral ; Physics: ; Igneous ; petrology
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  • 41
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    Use of microgranitoid enclaves as solid state strain markers in deformed granitic rocks an evaluation (1998)
    In:  J. Struct. Geol., Warszawa, EGS, vol. 20/6, no. 12, pp. 727-743, pp. L13609, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1998
    Schlagwort(e): Stress ; Geol. aspects ; petrology ; Mineralogy ; Structural geology ; JSG
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  • 42
    Unbekannt
    The Development, Evolution and Petroleum Geology of the Wessex Basin (1998)
    London : The Geological Society
    Details
    Schlagwort(e): Wessex ; England ; Großbritannien ; Becken (Geologie) ; Entstehung ; Entwicklung ; Erdölgeologie ; Erdöllagerstätte ; Erdgaslagerstätte ; Geologie ; Tektonik ; Petroleum ; Geology ; England ; Wessex Basin ; fossile Brennstoffe
    Beschreibung / Inhaltsverzeichnis: John R. Underhill and Robert Stoneley: Introduction to the development, evolution and petroleum geology of the Wessex Basin / Geological Society, London, Special Publications, 133:1-18, doi:10.1144/GSL.SP.1998.133.01.01 --- Hydrocarbon Habitat --- James G. Buchanan: The exploration history and controls on hydrocarbon prospectivity in the Wessex basins, southern England, UK / Geological Society, London, Special Publications, 133:19-37, doi:10.1144/GSL.SP.1998.133.01.02 --- P. W. Hawkes, A. J. Fraser, and C. C. G. Einchcomb: The tectono-stratigraphic development and exploration history of the Weald and Wessex basins, Southern England, UK / Geological Society, London, Special Publications, 133:39-65, doi:10.1144/GSL.SP.1998.133.01.03 --- Malcolm Butler: The geological history of the southern Wessex Basin — a review of new information from oil exploration / Geological Society, London, Special Publications, 133:67-86, doi:10.1144/GSL.SP.1998.133.01.04 --- Stratigraphic Syntheses --- Nigel R. Ainsworth, William Braham, F. John Gregory, Ben Johnson, and Christopher King: A proposed latest Triassic to earliest Cretaceous microfossil biozonation for the English Channel and its adjacent areas / Geological Society, London, Special Publications, 133:87-102, doi:10.1144/GSL.SP.1998.133.01.05 --- Nigel R. Ainsworth, William Braham, F. John Gregory, Ben Johnson, and Christopher King: The lithostratigraphy of the latest Triassic to earliest Cretaceous of the English Channel and its adjacent areas / Geological Society, London, Special Publications, 133:103-164, doi:10.1144/GSL.SP.1998.133.01.06 --- David C. Cole and Ian C. Harding: Use of palynofacies analysis to define Lower Jurassic (Sinemurian to Pliensbachian) genetic stratigraphic sequences in the Wessex Basin, England / Geological Society, London, Special Publications, 133:165-185, doi:10.1144/GSL.SP.1998.133.01.07 --- Regional Studies --- Adam Law: Regional uplift in the English Channel: quantification using sonic velocity / Geological Society, London, Special Publications, 133:187-197, doi:10.1144/GSL.SP.1998.133.01.08 --- Richard J. Bray, Ian R. Duddy, and Paul F. Green: Multiple heating episodes in the Wessex Basin: implications for geological evolution and hydrocarbon generation / Geological Society, London, Special Publications, 133:199-213, doi:10.1144/GSL.SP.1998.133.01.09 --- Neil A. McMahon and Jonathan Turner: The documentation of a latest Jurassic-earliest Cretaceous uplift throughout southern England and adjacent offshore areas / Geological Society, London, Special Publications, 133:215-240, doi:10.1144/GSL.SP.1998.133.01.10 --- Structural Studies --- Michael J. Harvey and Simon A. Stewart: Influence of salt on the structural evolution of the Channel Basin / Geological Society, London, Special Publications, 133:241-266, doi:10.1144/GSL.SP.1998.133.01.11 --- C. Smith and I. R. Hatton: Inversion tectonics in the Lyme Bay-West Dorset area of the Wessex Basin, UK / Geological Society, London, Special Publications, 133:267-281, doi:10.1144/GSL.SP.1998.133.01.12 --- H. S. Beeley and M. G. Norton: The structural development of the Central English Channel High — constraints from section restoration / Geological Society, London, Special Publications, 133:283-298, doi:10.1144/GSL.SP.1998.133.01.13 --- R. Hunsdale, D. J. Sanderson, and R. Hunsdale: Fault size distribution analysis — an example from Kimmeridge Bay, Dorset, UK / Geological Society, London, Special Publications, 133:299-310, doi:10.1144/GSL.SP.1998.133.01.14 --- M. Miliorizos and A. Ruffell: Kinematics of the Watchet-Cothelstone-Hatch Fault System: implications for the fault history of the Wessex Basin and adjacent areas / Geological Society, London, Special Publications, 133:311-330, doi:10.1144/GSL.SP.1998.133.01.15 --- Sedimentological Advances --- A. Ruffell: Tectonic accentuation of sequence boundaries: evidence from the Lower Cretaceous of southern England / Geological Society, London, Special Publications, 133:331-348, doi:10.1144/GSL.SP.1998.133.01.16 --- Stephen P. Hesselbo: Basal Wealden of Mupe Bay: a new model / Geological Society, London, Special Publications, 133:349-353, doi:10.1144/GSL.SP.1998.133.01.17 --- R. Goldring, T. R. Astin, J. E. A. Marshall, S. Gabbott, and C. D. Jenkins: Towards an integrated study of the depositional environment of the Bencliff Grit (Upper Jurassic) of Dorset / Geological Society, London, Special Publications, 133:355-372, doi:10.1144/GSL.SP.1998.133.01.18 --- Petroleum Geochemistry --- M. Ashley Bigge and Paul Farrimond: Biodegradation of seep oils in the Wessex Basin — a complication for correlation / Geological Society, London, Special Publications, 133:373-386, doi:10.1144/GSL.SP.1998.133.01.19 --- M. A. Parfitt and P. Farrimond: The Mupe Bay oil seep: a detailed organic geochemical study of a controversial outcrop / Geological Society, London, Special Publications, 133:387-397, doi:10.1144/GSL.SP.1998.133.01.20 --- Oil Field Case Histories --- T. McKie, J. Aggett, and A. J. C. Hogg: Reservoir architecture of the upper Sherwood Sandstone, Wytch Farm field, southern England / Geological Society, London, Special Publications, 133:399-406, doi:10.1144/GSL.SP.1998.133.01.21 --- Jonathan Evans, David Jenkins, and Jon Gluyas: The Kimmeridge Bay oilfield: an enigma demystified / Geological Society, London, Special Publications, 133:407-413, doi:10.1144/GSL.SP.1998.133.01.22
    Seiten: Online-Ressource (VI, 420 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 1897799993
    URL: http://sp.lyellcollection.org/content/133/1
    Sprache: Englisch
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  • 43
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    Petroleum Geology of North Africa (1998)
    London : The Geological Society
    Details
    Schlagwort(e): Nordafrika ; Erdölgeologie ; Lagerstätte ; Erdgas ; Erdöl ; Erdöllagerstätte ; Erdgaslagerstätte ; Geologie ; Tektonik ; Atlas (Gebirge) ; Kohlenwasserstoffe ; Petroleum ; Geology ; Africa, North ; fossile Brennstoffe ; Exploration und Prospektion von Bodenschätzen
    Beschreibung / Inhaltsverzeichnis: Duncan S. Macgregor: Introduction / Geological Society, London, Special Publications, 132:1-6, doi:10.1144/GSL.SP.1998.132.01.01 --- Palaeozoic and Sub-Salt Regional Papers --- David R. D. Boote, Daniel D. Clark-Lowes, and Marc W. Traut: Palaeozoic petroleum systems of North Africa / Geological Society, London, Special Publications, 132:7-68, doi:10.1144/GSL.SP.1998.132.01.02 --- Marc W. Traut, David R. D. Boote, and Daniel D. Clark-Lowes: Exploration history of the Palaeozoic petroleum systems of North Africa / Geological Society, London, Special Publications, 132:69-78, doi:10.1144/GSL.SP.1998.132.01.03 --- Duncan S. Macgregor: Giant fields, petroleum systems and exploration maturity of Algeria / Geological Society, London, Special Publications, 132:79-96, doi:10.1144/GSL.SP.1998.132.01.04 --- B. Fekirine and H. Abdallah: Palaeozoic lithofacies correlatives and sequence stratigraphy of the Saharan Platform, Algeria / Geological Society, London, Special Publications, 132:97-108, doi:10.1144/GSL.SP.1998.132.01.05 --- K. Echikh: Geology and hydrocarbon occurrences in the Ghadames Basin, Algeria, Tunisia, Libya / Geological Society, London, Special Publications, 132:109-129, doi:10.1144/GSL.SP.1998.132.01.06 --- Paul Logan and Ian Duddy: An investigation of the thermal history of the Ahnet and Reggane Basins, Central Algeria, and the consequences for hydrocarbon generation and accumulation / Geological Society, London, Special Publications, 132:131-155, doi:10.1144/GSL.SP.1998.132.01.07 --- Palaeozoic Reservoirs and Fields --- Rob Crossley and Neil McDougall: Lower Palaeozoic reservoirs of North Africa / Geological Society, London, Special Publications, 132:157-166, doi:10.1144/GSL.SP.1998.132.01.08 --- Mohamed Robert Djarnia and Berrached Fekirine: Sedimentological and diagenetic controls on Cambro-Ordovician reservoir quality in the southern Hassi Messaoud area (Saharan Platform, Algeria) / Geological Society, London, Special Publications, 132:167-174, doi:10.1144/GSL.SP.1998.132.01.09 --- N. Alem, S. Assassi, S. Benhebouche, and B. Kadi: Controls on hydrocarbon occurrence and productivity in the F6 reservoir, Tin Fouyé-Tabankort area, NW Illizi Basin / Geological Society, London, Special Publications, 132:175-186, doi:10.1144/GSL.SP.1998.132.01.10 --- Rabah Chaouchi, M. S. Malla, and F. Kechou: Sedimentological evolution of the Givetian-Eifelian (F3) sand bar of the West Alrar field, Illizi Basin, Algeria / Geological Society, London, Special Publications, 132:187-200, doi:10.1144/GSL.SP.1998.132.01.11 --- Mesozoic-Cenozoic Regional Papers --- Duncan S. Macgregor and Richard T. J. Moody: Mesozoic and Cenozoic petroleum systems of North Africa / Geological Society, London, Special Publications, 132:201-216, doi:10.1144/GSL.SP.1998.132.01.12 --- R. Guiraud: Mesozoic rifting and basin inversion along the northern African Tethyan margin: an overview / Geological Society, London, Special Publications, 132:217-229, doi:10.1144/GSL.SP.1998.132.01.13 --- M. Wilson, R. Guiraud, C. Moreau, and Y. J.-C. Bellion: Late Permian to Recent magmatic activity on the African-Arabian margin of Tethys / Geological Society, London, Special Publications, 132:231-263, doi:10.1144/GSL.SP.1998.132.01.14 --- M. L. Keeley and M. S. Massoud: Tectonic controls on the petroleum geology of NE Africa / Geological Society, London, Special Publications, 132:265-281, doi:10.1144/GSL.SP.1998.132.01.15 --- Al Moundir Morabet, Rabah Bouchta, and Haddou Jabour: An overview of the petroleum systems of Morocco / Geological Society, London, Special Publications, 132:283-296, doi:10.1144/GSL.SP.1998.132.01.16 --- Moesozoic Reservoirs and Fields --- S. M. Richardson, N. Vivian, R. J. Cook, M. Wilkes, and H. Hussein: Application of fault seal analysis techniques in the Western Desert, Egypt / Geological Society, London, Special Publications, 132:297-315, doi:10.1144/GSL.SP.1998.132.01.17 --- Rutger Gras and Bindra Thusu: Trap architecture of the Early Cretaceous Sarir Sandstone in the eastern Sirt Basin, Libya / Geological Society, London, Special Publications, 132:317-334, doi:10.1144/GSL.SP.1998.132.01.18 --- D. Spring and O. P. Hansen: The influence of platform morphology and sea level on the development of a carbonate sequence: the Harash Formation, Eastern Sirt Basin, Libya / Geological Society, London, Special Publications, 132:335-353, doi:10.1144/GSL.SP.1998.132.01.19 --- R. G. Loucks, R. T. J. Moody, J. K. Bellis, and A. A. Brown: Regional depositional setting and pore network systems of the El Garia Formation (Metlaoui Group, Lower Eocene), offshore Tunisia / Geological Society, London, Special Publications, 132:355-374, doi:10.1144/GSL.SP.1998.132.01.20 --- A. Zaïer, A. Beji-Sassi, S. Sassi, and R. T. J. Moody: Basin evolution and deposition during the Early Paleogene in Tunisia / Geological Society, London, Special Publications, 132:375-393, doi:10.1144/GSL.SP.1998.132.01.21 --- The Atlas Fold Belt --- R. Bracène, A. Bellahcène, D. Bekkouche, E. Mercier, and D. Frizon de Lamotte: The thin-skinned style of the South Atlas Front in Central Algeria / Geological Society, London, Special Publications, 132:395-404, doi:10.1144/GSL.SP.1998.132.01.22 --- Mark A. Morgan, John Grocott, and Richard T. J. Moody: The structural evolution of the Zaghouan-Ressas Structural Belt, northern Tunisia / Geological Society, London, Special Publications, 132:405-422, doi:10.1144/GSL.SP.1998.132.01.23 --- Karim Mekireche, Nordine Sabaou, and Reda-Samy Zazoun: Critical factors in the exploration of an Atlas intramontane basin; the Western Hodna Basin of northern Algeria / Geological Society, London, Special Publications, 132:423-432, doi:10.1144/GSL.SP.1998.132.01.24
    Seiten: Online-Ressource (442 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 1862390045
    URL: http://sp.lyellcollection.org/content/132/1
    Sprache: Englisch
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  • 44
    facet.materialart.
    Unbekannt
    Increase in melt fraction along a south-north traverse below the Tibetan Plateau: Evidence from seismology (1997)
    In:  Tectonophys., Hannover, Conseil de l'Europe, vol. 273, no. 1-2, pp. 17-30, pp. 1211, (ISSN 0343-5164)
    Details
    Publikationsdatum: 1997
    Schlagwort(e): Seismology ; Velocity depth profile ; petrology ; Mineralogy
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 45
    Unbekannt
    Petroleum Geology of Southeast Asia (1997)
    London : The Geological Society
    Details
    Schlagwort(e): Südostasien ; Erdölgeologie ; Erdöl ; fossile Brennstoffe ; Geologie ; Kohlenwasserstofflagerstätte ; Geology ; Petroleum ; Southeast Asia
    Beschreibung / Inhaltsverzeichnis: 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
    Seiten: Online-Ressource (VI, 436 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 1897799918
    URL: http://sp.lyellcollection.org/content/126/1
    Sprache: Englisch
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  • 46
    Unbekannt
    Petroleum Geology of the Southern North Sea : Future Potential (1997)
    London : The Geological Society
    Details
    Schlagwort(e): Erdgasgeologie ; Erdölgeologie ; Nordsee, Süd ; Geology ; North Sea ; Petroleum ; Petroleum in submerged lands
    Beschreibung / Inhaltsverzeichnis: 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
    Seiten: Online-Ressource (209 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 1897799829
    URL: http://sp.lyellcollection.org/content/123/1
    Sprache: Englisch
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  • 47
    Unbekannt
    Petroleum Geology of the Irish Sea and Adjacent Areas (1997)
    London : The Geological Society
    Details
    Schlagwort(e): fossile Brennstoffe ; Erdölgeologie ; Irische See
    Beschreibung / Inhaltsverzeichnis: 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
    Seiten: Online-Ressource (VI, 447 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 1897799845
    URL: http://sp.lyellcollection.org/content/124/1
    Sprache: Englisch
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  • 48
    facet.materialart.
    Unbekannt
    Garnets recording deep crustal earthquakes (1996)
    In:  Earth and Planetary Science Letters, Hannover, Bundesanstalt für Geowissenschaften und Rohstoffe, vol. 139, no. 4, pp. 223-238, pp. 1091
    Details
    Publikationsdatum: 1996
    Schlagwort(e): Hypocentral depth ; petrology ; Mineralogy ; Source ; Conference abstr.
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 49
    Digitale Medien
    Digitale Medien
    Reference concentrations for heavy metals in mineral soils, oat, and orchard grass (Dáctylis glomeráta) from three agricultural regions in Norway (1996)
    Springer
    Water, air & soil pollution 89 (1996), S. 375-397 
    Details
    ISSN: 1573-2932
    Schlagwort(e): trace elements ; background values ; petrology ; alum shale ; soil parent material ; organic material ; soil pollution ; soil contamination ; arsenic ; plant uptake
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik
    Notizen: Abstract Background values for heavy metals are necessary for the assessment of metal pollution of soils and plants. Samples of cultivated and uncultivated soils, oat grain, and seed heads of orchard grass (Dáctylis glomeráta) were collected from central, southeastern, and southwestern Norway. Total and easily extractable concentrations of As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn were determined in soil samples and total concentrations in plant samples. Element distributions have been correlated with petrology of soil parent material, type of mineral deposit, soil depth, geographic area, and land use. Concentrations of heavy metals are generally within the lower part of the normal global range. The petrology of the soil parent material has the greatest influence on aqua regia extracted metal concentrations among the factors studied. DTPA extracted metals show less dependence on rock types. Presence of alum shale results in particularly high values for Cd in both soil extracts and in oat grain. Soil cultivation seems to influence the relative concentration of metals in the topsoil. The ratios of easily extractable to total concentrations of metals are primarily related to the organic matter content. Metal concentrations in oat grain can best be predicted by concentrations in DTPA extracts and soil pH among the factors studied. Seed heads of orchard grass are less affected by concentrations in the soil and appear therefore to be a poor indicator of heavy metals in soils.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00171643
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  • 50
    facet.materialart.
    Unbekannt
    Global patterns of radiated seismic energy and apparent stress (1995)
    In:  J. Geophys. Res., Taipei, Elsevier, vol. 100, no. B9, pp. 18205-18228, pp. TC1002, (ISBN: 0-12-018847-3)
    Details
    Publikationsdatum: 1995
    Schlagwort(e): Radiation pattern ; Seismology ; Source parameters ; Stress drop ; JGR ; 1010 ; Geochemistry: ; Chemical ; evolution ; 3662 ; Mineralogy, ; Petrology, ; and ; Mineral ; Physics: ; Meteorites ; 3630 ; Mineral ; Physics: ; Experimental ; mineralogy ; and ; petrology ; 8125 ; Tectonophysics: ; Evolution ; of ; the ; Earth
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  • 51
    Unbekannt
    The Petroleum Geology of Ireland's Offshore Basins (1995)
    London : The Geological Society
    Details
    Schlagwort(e): Erdöl ; Erdölgeologie ; Irischer Schelf ; Petroleum -- Geology -- Ireland ; Petroleum -- Geology -- Atlantic Coast (Ireland) ; Petroleum in submerged lands -- Ireland ; Petroleum in submerged lands -- Atlantic Coast (Ireland) ; Basins (Geology) -- Ireland ; Basins (Geology) -- Atlantic Coast (Ireland) ; Recursos minerais ou geologia economica ; Petroleo (mineracao)
    Beschreibung / Inhaltsverzeichnis: P. F. Croker and P. M. Shannon: The petroleum geology of Ireland’s offshore basins: introduction / Geological Society, London, Special Publications, 93:1-8, doi:10.1144/GSL.SP.1995.093.01.01 --- P. W. Readman, B. M. O’Reilly, J. W. F. Edwards, and M. J. Sankey: A gravity map of Ireland and surrounding waters / Geological Society, London, Special Publications, 93:9-16, doi:10.1144/GSL.SP.1995.093.01.02 --- Rob Shelton: Mesozoic basin evolution of the North Channel: preliminary results / Geological Society, London, Special Publications, 93:17-20, doi:10.1144/GSL.SP.1995.093.01.03 --- Steven Fitzsimons and John Parnell: Diagenetic history and reservoir potential of Permo-Triassic sandstones in the Rathlin Basin / Geological Society, London, Special Publications, 93:21-35, doi:10.1144/GSL.SP.1995.093.01.04 --- James P. Armstrong, Victor A. A. D’Elia, and Rita Löberg: Holywell Shale: a potential source of hydrocarbons in the East Irish Sea / Geological Society, London, Special Publications, 93:37-38, doi:10.1144/GSL.SP.1995.093.01.05 --- Stephen Trueblood, Chris Bryan, and Steve Pickering: The Douglas oil field and its implications for exploration on the Irish Continental Shelf / Geological Society, London, Special Publications, 93:39-40, doi:10.1144/GSL.SP.1995.093.01.06 --- Peter F. Croker: Shallow gas accumulation and migration in the western Irish Sea / Geological Society, London, Special Publications, 93:41-58, doi:10.1144/GSL.SP.1995.093.01.07 --- Steven J. Maddox, Richard Blow, and Martin Hardman: Hydrocarbon prospectivity of the Central Irish Sea Basin with reference to Block 42/12, offshore Ireland / Geological Society, London, Special Publications, 93:59-77, doi:10.1144/GSL.SP.1995.093.01.08 --- P. S. Griffiths: Predictive model for the development and distribution of Triassic reservoir sands offshore southeast Ireland, based on seismic sequence geometries at the Variscan unconformity / Geological Society, London, Special Publications, 93:79-80, doi:10.1144/GSL.SP.1995.093.01.09 --- F. W. Musgrove, L. M. Murdoch, and T. Lenehan: The Variscan fold-thrust belt of southeast Ireland and its control on early Mesozoic extension and deposition: a method to predict the Sherwood Sandstone / Geological Society, London, Special Publications, 93:81-100, doi:10.1144/GSL.SP.1995.093.01.10 --- Philip Rowell: Tectono-stratigraphy of the North Celtic Sea Basin / Geological Society, London, Special Publications, 93:101-137, doi:10.1144/GSL.SP.1995.093.01.11 --- Nuala P. Ewins and Patrick M. Shannon: Sedimentology and diagenesis of the Jurassic and Cretaceous of the North Celtic Sea and Fastnet Basins / Geological Society, London, Special Publications, 93:139-169, doi:10.1144/GSL.SP.1995.093.01.12 --- L. G. Kessler II and Scott D. Sachs: Depositional setting and sequence stratigraphic implications of the Upper Sinemurian (Lower Jurassic) sandstone interval, North Celtic Sea/St George’s Channel Basins, offshore Ireland / Geological Society, London, Special Publications, 93:171-192, doi:10.1144/GSL.SP.1995.093.01.13 --- N. J. Murphy, M. J. Sauer, and J. P. Armstrong: Toarcian source rock potential in the North Celtic Sea Basin, offshore Ireland / Geological Society, London, Special Publications, 93:193-207, doi:10.1144/GSL.SP.1995.093.01.14 --- V. N. D. Caston: The Helvick oil accumulation, Block 49/9, North Celtic Sea Basin / Geological Society, London, Special Publications, 93:209-225, doi:10.1144/GSL.SP.1995.093.01.15 --- D. R. Taber, M. K. Vickers, and R. D. Winn, Jr: The definition of the Albian ‘A’ Sand reservoir fairway and aspects of associated gas accumulations in the North Celtic Sea Basin / Geological Society, London, Special Publications, 93:227-244, doi:10.1144/GSL.SP.1995.093.01.16 --- Adrian Hartley: Sedimentology of the Cretaceous Greensand, Quadrants 48 and 49, North Celtic Sea Basin: a progradational shoreface deposit / Geological Society, London, Special Publications, 93:245-257, doi:10.1144/GSL.SP.1995.093.01.17 --- M. V. Murray: Development of small gas fields in the Kinsale Head area / Geological Society, London, Special Publications, 93:259-260, doi:10.1144/GSL.SP.1995.093.01.18 --- Tim J. Howell and Paul Griffiths: A study of the hydrocarbon distribution and Lower Cretaceous Greensand prospectivity in Blocks 48/15, 48/17, 48/18 and 48/19, North Celtic Sea Basin / Geological Society, London, Special Publications, 93:261-275, doi:10.1144/GSL.SP.1995.093.01.19 --- John E. Craven: The tectonic evolution, stratigraphy and petroleum potential of the Mizen Basin, southwest Celtic Sea / Geological Society, London, Special Publications, 93:277, doi:10.1144/GSL.SP.1995.093.01.20 --- C. Smith: Evolution of the Cockburn Basin: implications for the structural development of the Celtic Sea basins / Geological Society, London, Special Publications, 93:279-295, doi:10.1144/GSL.SP.1995.093.01.21 --- L. M. Murdoch, F. W. Musgrove, and J. S. Perry: Tertiary uplift and inversion history in the North Celtic Sea Basin and its influence on source rock maturity / Geological Society, London, Special Publications, 93:297-319, doi:10.1144/GSL.SP.1995.093.01.22 --- Robert J. Menpes and Richard R. Hillis: Quantification of Tertiary exhumation from sonic velocity data, Celtic Sea/Southwestern Approaches / Geological Society, London, Special Publications, 93:321-322, doi:10.1144/GSL.SP.1995.093.01.23 --- N. A. McMahon and J. R. Underhill: The regional stratigraphy of the southwest United Kingdom and adjacent offshore areas with particular reference to the major intra-Cretaceous unconformity / Geological Society, London, Special Publications, 93:323-325, doi:10.1144/GSL.SP.1995.093.01.24 --- Peter F. Croker: The Clare Basin: a geological and geophysical outline / Geological Society, London, Special Publications, 93:327-339, doi:10.1144/GSL.SP.1995.093.01.25 --- D. O’Driscoll, B. B. Holcombe, P. T. Rose, and D. J. Jones: Cretaceous and Tertiary unconformities in the Atlantic margin basins / Geological Society, London, Special Publications, 93:341, doi:10.1144/GSL.SP.1995.093.01.26 --- T. C. Earls: Potential for development of the Connemara field, Block 26/28 / Geological Society, London, Special Publications, 93:343, doi:10.1144/GSL.SP.1995.093.01.27 --- J. G. Moore and P. M. Shannon: The Cretaceous succession in the Porcupine Basin, offshore Ireland: facies distribution and hydrocarbon potential / Geological Society, London, Special Publications, 93:345-370, doi:10.1144/GSL.SP.1995.093.01.28 --- T. McCann, P. M. Shannon, and J. G. Moore: Fault styles in the Porcupine Basin, offshore Ireland: tectonic and sedimentary controls / Geological Society, London, Special Publications, 93:371-383, doi:10.1144/GSL.SP.1995.093.01.29 --- I. C. Scotchman and J. R. W. Thomas: Maturity and hydrocarbon generation in the Slyne Trough, northwest Ireland / Geological Society, London, Special Publications, 93:385-411, doi:10.1144/GSL.SP.1995.093.01.30 --- Brian M. O’Reilly, Franz Hauser, A. W. Brian Jacob, Pat M. Shannon, Jannis Makris, and Ulrike Vogt: The Erris and eastern Rockall Troughs: structural and sedimentological development / Geological Society, London, Special Publications, 93:413-421, doi:10.1144/GSL.SP.1995.093.01.31 --- Richard W. England: Westline: a deep near-normal incidence reflection profile across the Rockall Trough / Geological Society, London, Special Publications, 93:423-427, doi:10.1144/GSL.SP.1995.093.01.32 --- A. W. B. Jacob, P. M. Shannon, J. Makris, F. Hauser, U. Vogt, and B. M. O’Reilly: An overview of the results of the RAPIDS seismic project, North Atlantic / Geological Society, London, Special Publications, 93:429-431, doi:10.1144/GSL.SP.1995.093.01.33 --- J. S. Daly, L. M. Heaman, R. C. Fitzgerald, J. F. Menuge, T. S. Brewer, and A. C. Morton: Age and crustal evolution of crystalline basement in western Ireland and Rockall / Geological Society, London, Special Publications, 93:433-434, doi:10.1144/GSL.SP.1995.093.01.34 --- P. M. Shannon, A. W. B. Jacob, J. Makris, B. O’Reilly, F. Hauser, and U. Vogt: Basin development and petroleum prospectivity of the Rockall and Hatton region / Geological Society, London, Special Publications, 93:435-457, doi:10.1144/GSL.SP.1995.093.01.35 --- Jannis Makris, Knuth Lange, Leo Savostin, and Vladimir Sedov: A wide-angle reflection profile across the Iceland-Faeroe Ridge / Geological Society, London, Special Publications, 93:459-466, doi:10.1144/GSL.SP.1995.093.01.36 --- P. M. Shannon, B. P. J. Williams, and I. K. Sinclair: Tectonic controls on Upper Jurassic to Lower Cretaceous reservoir architecture in the Jeanne d’Arc Basin, with some comparisons from the Porcupine and Moray Firth Basins / Geological Society, London, Special Publications, 93:467-490, doi:10.1144/GSL.SP.1995.093.01.37 --- Appendix: A list of common abbreviations / Geological Society, London, Special Publications, 93:491, doi:10.1144/GSL.SP.1995.093.01.38
    Seiten: Online-Ressource (VI, 498 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 1897799349
    URL: http://sp.lyellcollection.org/content/93/1
    Sprache: Englisch
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  • 52
    Unbekannt
    Coal and coal-bearing strata as oil-prone source rocks? (1994)
    London : The Geological Society
    Details
    Schlagwort(e): Erdöllagerstätte ; Kohlenlagerstätte ; Kohle ; Erdöl ; Erdölbildung ; Erdölgeologie ; fossile Brennstoffe
    Beschreibung / Inhaltsverzeichnis: Andrew J. Fleet and Andrew C. Scott: Coal and coal-bearing strata as oil-prone source rocks: an overview / Geological Society, London, Special Publications, 77:1-8, doi:10.1144/GSL.SP.1994.077.01.01 --- General Studies --- T. G. Powell and C. J. Boreham: Terrestrially sourced oils: where do they exist and what are our limits of knowledge? — a geochemical perspective / Geological Society, London, Special Publications, 77:11-29, doi:10.1144/GSL.SP.1994.077.01.02 --- Margaret E. Collinson, Pim F. Van Bergen, Andrew C. Scott, and Jan W. De Leeuw: The oil-generating potential of plants from coal and coal-bearing strata through time: a review with new evidence from Carboniferous plants / Geological Society, London, Special Publications, 77:31-70, doi:10.1144/GSL.SP.1994.077.01.03 --- R. P. Philp: Geochemical characteristics of oils derived predominantly from terrigenous source materials / Geological Society, London, Special Publications, 77:71-91, doi:10.1144/GSL.SP.1994.077.01.04 --- Scott A. Stout: Chemical heterogeneity among adjacent coal microlithotypes — implications for oil generation and primary migration from humic coal / Geological Society, London, Special Publications, 77:93-106, doi:10.1144/GSL.SP.1994.077.01.05 --- Duncan S. Macgregor: Coal-bearing strata as source rocks — a global overview / Geological Society, London, Special Publications, 77:107-116, doi:10.1144/GSL.SP.1994.077.01.06 --- Case Histories --- S. Thompson, B. S. Cooper, and P. C. Barnard: Some examples and possible explanations for oil generation from coals and coaly sequences / Geological Society, London, Special Publications, 77:119-137, doi:10.1144/GSL.SP.1994.077.01.07 --- C. J. Matchette-Downes, A. E. Fallick, Karmajaya, and S. Rowland: A maturity and palaeoenvironmental assessment of condensates and oils from the North Sumatra Basin, Indonesia / Geological Society, London, Special Publications, 77:139-148, doi:10.1144/GSL.SP.1994.077.01.08 --- David J. Curry, John K. Emmett, and John W. Hunt: Geochemistry of aliphatic-rich coals in the Cooper Basin, Australia and Taranaki Basin, New Zealand: implications for the occurrence of potentially oil-generative coals / Geological Society, London, Special Publications, 77:149-181, doi:10.1144/GSL.SP.1994.077.01.09 --- Mark A. Bagge and Martin L. Keeley: The oil potential of Mid-Jurassic coals in northern Egypt / Geological Society, London, Special Publications, 77:183-200, doi:10.1144/GSL.SP.1994.077.01.10 --- Andrew C. Scott and Andrew J. Fleet: Coal and coal-bearing strata as oil-prone source rocks: current problems and future directions / Geological Society, London, Special Publications, 77:201-205, doi:10.1144/GSL.SP.1994.077.01.11
    Seiten: Online-Ressource (213 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 0903317990
    URL: http://sp.lyellcollection.org/content/77/1
    Sprache: Englisch
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  • 53
    Digitale Medien
    Digitale Medien
    Rhyolite volcanism in the Krafla central volcano, north-east Iceland (1994)
    Springer
    Bulletin of volcanology 56 (1994), S. 516-528 
    Details
    ISSN: 1432-0819
    Schlagwort(e): Rhyolite ; petrology ; minimum melts near-solidus fractionation ; mixing ; Krafla ; Iceland
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie
    Notizen: Abstract At the Krafla central volcano in north-east Iceland, two main phases of rhyolite volcanism are identified. The earlier phase (last interglacial) is related to the formation of a caldera, whereas the second phase (last glacial) is related to the emplacement of a ring dike. Subsequently, only minor amounts of rhyolite have been erupted. The volcanic products of Krafla are volumetrically bimodal. Geochemically, there is a series of basaltic to basalto-andesitic rocks and a cluster of rhyolitic rocks. Rocks of intermediate to silicic composition (icelandites and dacites) show clear signs of mixing. The rhyolites are Fe-rich (tholeiitic), and aphyric to slightly porphyritic (plagioclase, augite, pigeonite, fayalitic olivine and magnetite). They are minimum melts on the quartz-plagioclase cotectic plane in the granite system (Qz-Or-Ab-An). The rhyolites at Krafla were produced by near-solidus, rather than nearliquidus fractionation. They are interpreted as silicic minimum melts of hydrothermally altered crust, mainly of basaltic composition. They were primarily generated on the peripheries of an active basaltic magma chamber or intrusive domain, where sufficient volumes of crust were subjected to temperatures favorable for rhyolite genesis (850–950° C). The silicic melts were extracted crystal-free from their source in response to crustal deformation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00302832
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    Volltext
  • 54
    Digitale Medien
    Digitale Medien
    Volcanological and petrological evolution of Nyiragongo volcano, Virunga volcanic field, Zaire (1994)
    Springer
    Bulletin of volcanology 56 (1994), S. 47-61 
    Details
    ISSN: 1432-0819
    Schlagwort(e): Nyiragongo ; volcanology ; petrology ; melilitite ; nephelinite ; feldspathoid flotation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie
    Notizen: Abstract Three major phases are distinguished during the growth of Nyiragongo, an active volcano at the western limit of the Virunga Range, Zaire. Lavas erupted during phase 1 are strongly undersaturated melilities characterized by the presence of kalsilite phenocrysts, perovskite, and the abundance of calcite in the matrix. Such lavas crop out mainly on the inner crater wall and progressively evolve toward more aphyric melilite nephelinites well represented on the flanks of the volcano. Adventive vents lying at the base of the cone developed along radial fracture systems and erupted olivine and/or clinopyroxene-rich melilitites or nephelinites. Stage 2 lavas are melilite-free nephelinites. Clinopyroxene is the main phenocryst and feldspathoids are abundant in the lavas exposed on the crater wall. These flows result from periodic overflowing of a magma column from an open crater. Extensive fissure flows which erupted from the base of the cone at the end of this stage are related to widespread draining out of magma which in turn induces the formation of the summit pit crater. Magmas erupted during stage 3 are relatively aphyric melilite nephelinites and the main volcanological characteristic is the permanent lava lake observed into the pit crater until the 1977 eruption. Fluctuations of the level of the lava lake was responsible for the development of the inner terraces. Periodic overflowing of the lava lake from the central pit formed the nepheline aggregate lava flows. Petrography and major element geochemistry allow the determination of the principal petrogenetic processes. Melilitites and nephelinites erupted from the summit crater are lavas derived, via clinopyroxene fractionation, from a more primitive melt. The abundance of feldspathoids in these lavas is in keeping with nepheline flotation. Aphyric melilite nephelinites covering the flanks and the extensive fissure flows have a homogencous chemical composition; rocks from the historical lava lake are slightly more evolved. All these lavas differentiated in a shallow reservoir. Lavas erupted from the parasitic vents are mainly olivine and/or clinopyroxene-phyric rocks. Rushayite and picrites from Muja cone are peculiar high-magnesium lavas resulting from the addition of olivine xenocrysts to melilitic or nephelinitic melts. Fluid and melt inclusions in olivine and clinopyroxene phenocrysts indicate a crystallization depth of 10–14 km. A model involving two reservoirs located at different depths and periodically connected is proposed to explain the petrography of the lavas; this hypothesis is in accordance with geophysical data.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00279728
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  • 55
    Digitale Medien
    Digitale Medien
    Rhyolite volcanism in the Krafla central volcano, north-east Iceland (1994)
    Springer
    Bulletin of volcanology 56 (1994), S. 516-528 
    Details
    ISSN: 1432-0819
    Schlagwort(e): Key words Rhyolite ; petrology ; minimum melts near-solidus fractionation ; mixing ; Krafla ; Iceland
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie
    Notizen: Abstract At the Krafla central volcano in north-east Iceland, two main phases of rhyolite volcanism are identified. The earlier phase (last interglacial) is related to the formation of a caldera, whereas the second phase (last glacial) is related to the emplacement of a ring dike. Subsequently, only minor amounts of rhyolite have been erupted. The volcanic products of Krafla are volumetrically bimodal. Geochemically, there is a series of basaltic to basalto-andesitic rocks and a cluster of rhyolitic rocks. Rocks of intermediate to silicic composition (icelandites and dacites) show clear signs of mixing. The rhyolites are Fe-rich (tholeiitic), and aphyric to slightly porphyritic (plagioclase, augite, pigeonite, fayalitic olivine and magnetite). They are minimum melts on the quartz–plagioclase cotectic plane in the granite system (Qz–Or–Ab–An). The rhyolites at Krafla were produced by near-solidus, rather than near-liquidus fractionation. They are interpreted as silicic minimum melts of hydrothermally altered crust, mainly of basaltic composition. They were primarily generated on the peripheries of an active basaltic magma chamber or intrusive domain, where sufficient volumes of crust were subjected to temperatures favorable for rhyolite genesis (850–950°  C). The silicic melts were extracted crystal-free from their source in response to crustal deformation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s004450050060
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  • 56
    Digitale Medien
    Digitale Medien
    The origin of bathymetric highs at ridge-transform intersections: A multi-disciplinary case study at the Clipperton Fracture Zone (1994)
    Springer
    Marine geophysical researches 16 (1994), S. 1-50 
    Details
    ISSN: 1573-0581
    Schlagwort(e): transform fault ; Clipperton Fracture Zone ; mid-ocean ridge ; East Pacific Rise ; petrology ; multichannel seismic reflection ; sea floor photography
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract Bathmetric highs on the old crust proximal to ridge-transform intersections (RTIs), termed “intersection highs”, are common but poorly understood features at offsets of fast to intermediate rate spreading centers. We have combined new reflection seismic, photographic, and geochemical data with previously published Seabeam, SeaMARC I, and SeaMARC II data to address the nature of the intersection highs at the Clipperton Fracture Zone. The Clipperton Intersection Highs are both topped by a carapace of young lavas at least 100 m thick. These lavas, which were erupted on the intersection highs, are chemically similar to their adjacent ridge segments and different from the surrounding older crust. At least some of the erupted magma traveled directly from the adjacent ridge at a shallow crustal level. Ridge-related magma covers and intrudes at least the upper 500 m of the transform tectonized crust at the RTI. We suspect that additional magma enters the intersection highs from directly below, without passing through the ridge. The young oceanic crust near the western Clipperton RTI is not thin by regional comparison. The 1.4 m.y. old crust near the eastern Clipperton RTI thickens approaching the transform offset. If the thermal effects of the proximal ridge were negligible, the eastern intersection high crust would appear to be in isostatic equilibrium. We believe that thermal effects are significant, and that the intersection high region stands anomalously shallow for its crustal thickness. This is attributable to increased temperature in the mantle below the ridge-proximal crust. Although ridge magma is injected into the proximal old crust, plate boundary reorganization is not taking place. Intersection high formation has been an ongoing process at both of the Clipperton RTIs for at least the past 1 m.y., during which time the plate boundary configuration has not changed appreciably. We envision a constant interplay between the intruding ridge magma and the disrupting transform fault motion. In addition, we envision a nearly constant input of magma from below the high, as an extension of the magma supply to the ridge from the mantle. Because the proximal ridge profoundly affects the juxtaposed crust at the RTI, sea floor fabric along the aseismic extensions of this fast-slipping transform fault is primarily a record of processes at work at the RTI rather than a record of transform tectonism.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01812444
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  • 57
    facet.materialart.
    Unbekannt
    Elemental yields and complex lithology analysis from the pulsed spectral gamma log (1993)
    Soc. Professional Well Log Analysts
    In:  Transactions of the SPWLA 34th Ann. Logging Symp., Calgary, June 13-16, 1993, vol. 2, paper UU, Bremerhaven, Soc. Professional Well Log Analysts, vol. 10, no. No. 31, pp. 86-121, (ISBN 0 08 042822 3)
    Details
    Publikationsdatum: 1993
    Schlagwort(e): Borehole geophys. ; Spectral Gamma Ray log ; petrology
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    BIBLIOGRAFIE SEISMOLOGIE
  • 58
    facet.materialart.
    Unbekannt
    Two-mechanism model for frictional sliding of serpentinite (1992)
    In:  Geophys. Res. Lett., Tübingen, Univ. Calif. Publ., vol. 19, no. 5484, pp. 1535-1538, pp. B05411, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1992
    Schlagwort(e): Friction ; Laboratory measurements ; petrology ; Rock mechanics ; GRL
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    BIBLIOGRAFIE SEISMOLOGIE
  • 59
    Unbekannt
    Classic Petroleum Provinces (1990)
    London : The Geological Society
    Details
    Schlagwort(e): Erdöl ; Erdölgeologie ; Erdöllagerstätte ; Gaz naturel ; Geology ; Natural gas ; Petroleum ; Pétrole
    Beschreibung / Inhaltsverzeichnis: Jim Brooks: Classic petroleum provinces / Geological Society, London, Special Publications, 50:1-8, doi:10.1144/GSL.SP.1990.050.01.01 --- K. H. James: The Venezuelan hydrocarbon habitat / Geological Society, London, Special Publications, 50:9-35, doi:10.1144/GSL.SP.1990.050.01.02 --- R. Aymard, L. Pimentel, P. Eitz, P. Lopez, A. Chaouch, J. Navarro, J. Mijares, and J. G. Pereira: Geological integration and evaluation of Northern Monagas, Eastern Venezuelan Basin / Geological Society, London, Special Publications, 50:37-53, doi:10.1144/GSL.SP.1990.050.01.03 --- Nestor Chigne and Leroy Hernandez: Main aspects of petroleum exploration in the Apure area of Southwestern Venezuela, 1985–1987 / Geological Society, London, Special Publications, 50:55-75, doi:10.1144/GSL.SP.1990.050.01.04 --- M. Roberto, L. Mompart, E. Puche, and F. Scherer: New oil discoveries in the Ceuta area, SE Lake Maracaibo, Venezuela / Geological Society, London, Special Publications, 50:77-88, doi:10.1144/GSL.SP.1990.050.01.05 --- M. F. Dashwood and I. L. Abbotts: Aspects of the petroleum geology of the Oriente Basin, Ecuador / Geological Society, London, Special Publications, 50:89-117, doi:10.1144/GSL.SP.1990.050.01.06 --- W. U. Mohriak, M. R. Mello, J. F. Dewey, and J. R. Maxwell: Petroleum geology of the Campos Basin, offshore Brazil / Geological Society, London, Special Publications, 50:119-141, doi:10.1144/GSL.SP.1990.050.01.07 --- Richard J. Hubbard, Steven P. Edrich, and R. Peter Rattey: Geological evolution and hydrocarbon habitat of the ‘Arctic Alaska microplate’ / Geological Society, London, Special Publications, 50:143-187, doi:10.1144/GSL.SP.1990.050.01.08 --- S. Creaney and J. Allan: Hydrocarbon generation and migration in the Western Canada sedimentary basin / Geological Society, London, Special Publications, 50:189-202, doi:10.1144/GSL.SP.1990.050.01.9 --- J. A. Lopez: Structural styles of growth faults in the U.S. Gulf Coast Basin / Geological Society, London, Special Publications, 50:203-219, doi:10.1144/GSL.SP.1990.050.01.10 --- T. G. Fails: The Northern Gulf Coast Basin: a classic petroleum province / Geological Society, London, Special Publications, 50:221-248, doi:10.1144/GSL.SP.1990.050.01.11 --- D. H. Craig: Yates and other Guadalupian (Kazanian) oil fields, U. S. Permian Basin / Geological Society, London, Special Publications, 50:249-263, doi:10.1144/GSL.SP.1990.050.01.12 --- R. Sassen: Geochemistry of carbonate source rocks and crude oils in Jurassic salt basins of the Gulf Coast / Geological Society, London, Special Publications, 50:265-277, doi:10.1144/GSL.SP.1990.050.01.13 --- Moujahed I. Husseini and Sadad I. Husseini: Origin of the Infracambrian Salt Basins of the Middle East / Geological Society, London, Special Publications, 50:279-292, doi:10.1144/GSL.SP.1990.050.01.14 --- R. Stoneley: The Middle East Basin: a summary overview / Geological Society, London, Special Publications, 50:293-298, doi:10.1144/GSL.SP.1990.050.01.15 --- A. S. Alsharhan: Geology and reservoir characteristics of Lower Cretaceous Kharaib Formation in Zakum Field, Abu Dhabi, United Arab Emirates / Geological Society, London, Special Publications, 50:299-316, doi:10.1144/GSL.SP.1990.050.01.16 --- P. J. Grantham, G. W. M. Lijmbach, and J. Posthuma: Geochemistry of crude oils in Oman / Geological Society, London, Special Publications, 50:317-328, doi:10.1144/GSL.SP.1990.050.01.17 --- S. K. Paul: People’s Democratic Republic of Yemen: a future oil province / Geological Society, London, Special Publications, 50:329-339, doi:10.1144/GSL.SP.1990.050.01.18 --- R. Zaki, H. McDowell, I. Threadgold, and O. Oldfield: Sub-salt imaging in the Gulf of Suez / Geological Society, London, Special Publications, 50:341-351, doi:10.1144/GSL.SP.1990.050.01.19 --- H. M. Helmy: Southern Gulf of Suez, Egypt: structural geology of the B-trend oil fields / Geological Society, London, Special Publications, 50:353-363, doi:10.1144/GSL.SP.1990.050.01.20 --- H. Doust: Petroleum geology of the Niger Delta / Geological Society, London, Special Publications, 50:365, doi:10.1144/GSL.SP.1990.050.01.21 --- K. J. Weber: Niger Delta reservoir geology: historical growth of the sedimentological model and its application to field development / Geological Society, London, Special Publications, 50:367, doi:10.1144/GSL.SP.1990.050.01.22 --- M. Sella, C. Turci, and A. Riva: Petroleum geology of the ‘Fossa Bradanica’ (foredeep of the Southern Apennine thrust belt) / Geological Society, London, Special Publications, 50:369-378, doi:10.1144/GSL.SP.1990.050.01.23 --- Dietert Van Der Baan: Zechstein reservoirs in The Netherlands / Geological Society, London, Special Publications, 50:379-398, doi:10.1144/GSL.SP.1990.050.01.24 --- K. W. Glennie and D. M. J. Provan: Lower Permian Rotliegend reservoir of the Southern North Sea gas province / Geological Society, London, Special Publications, 50:399-416, doi:10.1144/GSL.SP.1990.050.01.25 --- A. J. Fraser, D. F. Nash, R. P. Steele, C. C. Ebdon, and A. J. Fraser: A regional assessment of the intra-Carboniferous play of Northern England / Geological Society, London, Special Publications, 50:417-440, doi:10.1144/GSL.SP.1990.050.01.26 --- R. M. Pegrum and A. M. Spencer: Hydrocarbon plays in the northern North Sea / Geological Society, London, Special Publications, 50:441-470, doi:10.1144/GSL.SP.1990.050.01.27 --- O. R. Heum and R. M. Larsen: Haltenbanken hydrocarbon province (off-shore Mid-Norway) / Geological Society, London, Special Publications, 50:471, doi:10.1144/GSL.SP.1990.050.01.28 --- A. E. Kontorovich, M. M. Mandel’Baum, V. S. Surkov, A. A. Trofimuk, and A. N. Zolotov: Lena-Tunguska Upper Proterozoic-Palaeozoic petroleum superprovince / Geological Society, London, Special Publications, 50:473-489, doi:10.1144/GSL.SP.1990.050.01.29 --- I. I. Nesterov, F. K. Salvamanov, A. E. Kontorovich, N. K. Kulakhmetov, V. S. Surkov, A. A. Trofimuk, and V. I. Shpilman: West Siberian oil and gas superprovince / Geological Society, London, Special Publications, 50:491-502, doi:10.1144/GSL.SP.1990.050.01.30 --- P. Dolan: Pakistan: a history of petroleum exploration and future potential / Geological Society, London, Special Publications, 50:503-524, doi:10.1144/GSL.SP.1990.050.01.31 --- V. D. Rahmanian, P. S. Moore, W. J. Mudge, and D. E. Spring: Sequence stratigraphy and the habitat of hydrocarbons, Gippsland Basin, Australia / Geological Society, London, Special Publications, 50:525-544, doi:10.1144/GSL.SP.1990.050.01.32 --- S. R. Lawrence: Aspects of the petroleum geology of the Junggar Basin, Northwest China / Geological Society, London, Special Publications, 50:545-557, doi:10.1144/GSL.SP.1990.050.01.33
    Seiten: Online-Ressource (V, 570 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 0903317486
    URL: http://sp.lyellcollection.org/content/50/1
    Sprache: Englisch
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    Digitale Medien
    Digitale Medien
    Analysis of spatial order in sandstones. I. Basic principles (1990)
    Springer
    Mathematical geology 22 (1990), S. 333-359 
    Details
    ISSN: 1573-8868
    Schlagwort(e): two-dimensional Fourier transform ; spatial analysis ; petrology
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Mathematik
    Notizen: Abstract The spatial arrangement of sedimentary rock components is a fundamental property of sedimentary rocks. If we assume that the size, shape, and composition of sedimentary rock components (mineral grains, pores) carry useful petrologic information, there is no reason to assume that their spatial arrangement does not. Spatial arrangement has been discussed in terms of “texture” and “fabric,” but it has had little objective measurement or classification. This deficiency is primarily due to the difficulties associated with the quantification of spatial phenomena. However, using digital-imaging techniques it is possible to generate petrographic images from thin-sections and quantify the spatial arrangement of selected rock components using a two-dimensional (2D) Fourier transform. A Fourier transform creates a spectral representation of the image similar to an x-ray diffraction pattern. This paper presents the fundamental framework of 2D Fourier analysis in petrology. This type of analysis provides a means to quantify and analyze the spatial arrangement of rock components in an objective, mathematical framework. 2D Fourier power spectra can be used to characterize the type and degree of spatial order in an image, both in terms of the classical concepts of long-range and short-range order and in terms of spatial patterns characteristic of sedimentary rock. The clearly defined mathematical relationship between an image and its Fourier power spectrum provide the opportunity to define the 2D structure of an image in the same manner that x-ray diffraction patterns are used to map 3D structure in minerals. In addition, a 2D Fourier power spectrum is easily transformed into a radial power spectrum. Radial power spectra can be used to characterize the density of objects in an image. They also provide a valid means to compare and contrast images in a multivariate framework, regardless of the type of order. One of the most desirable properties of a Fourier transform is its reversibility. Using selected components of the power spectrum, the inverse transform can be used to build synthetic images, which highlight those petrologic components that most affect the power spectrum. The inverse transform provides the means to translate the results of analysis into meaningful petrologic characteristics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00889892
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  • 61
    Unbekannt
    Deltas : Sites and Traps for Fossil Fuels (1989)
    Oxford, London, Edinburgh, Boston, Melbourne : Blackwell Scientific Publications
    Details
    Schlagwort(e): Delta ; Deltasediment ; Erdölgeologie ; Combustibles fossiles ; Deltas ; Pétrole - Géologie ; Sedimentation and deposition ; Sédimentation (géologie) ; Sédiments (géologie) ; Traps (Petroleum geology)
    Beschreibung / Inhaltsverzeichnis: 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
    Seiten: Online-Ressource (IX, 360 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 0632023856
    URL: http://sp.lyellcollection.org/content/41/1
    Sprache: Englisch
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    Digitale Medien
    Geology of Macdonald Seamount region, Austral Islands: Recent hotspot volcanism in the south Pacific (1989)
    Springer
    Marine geophysical researches 11 (1989), S. 101-112 
    Details
    ISSN: 1573-0581
    Schlagwort(e): volcanology ; hotspot ; Pacific ; Macdonald ; petrology ; Austral Islands
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract The southeastern extension of the Austral Islands volcanic chain terminates near 29°S, 140°W at the active Macdonald Seamount. The ‘hotspot’ region near Macdonald consists of at least five other volcanic edifices each more than 500 m high, included in an area about 50–100 km in diameter. On the basis of the sea-floor topography, the southeastern limit of the hotspot area is located about 20 km east of the base of Macdonald, where it is defined by the 3950 m isobath. At the edge of the hotspot area, there is a marked deepening of the seafloor from c.3900 m down to 4000–4300 m. The deeper sea-floor is faulted and heavily sedimented. The Macdonald volcano itself stands 3760 m above the surrounding seafloor, and has a basal diameter of 45 km. Its summit in January 1987 was 39 m below sea level, and it seems likely that Macdonald will emerge at the surface in the near future. Recent (March and November 1986) phreatic explosions on Macdonald Seamount erupted fragments of ultramafic and mafic plutonic blocks together with basic lapilli (volcaniclastic sand). The plutonic blocks have been variably altered and metamorphosed, and in some cases show signs of mineralisation (disseminated sulphides). The blocks presumably come from deeper levels in the volcanic system. The volcanics so far dredged from Macdonald consist of olivine and clinopyroxene cumulus-enriched basalts, evolved basalts, and mugearite. On the basis of incompatible element variations, simple crystal fractionation seems to be controlling the chemical evolution of Macdonald magmas.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00285661
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  • 63
    Digitale Medien
    Digitale Medien
    Some topological and combinatorial properties ofc-component (c + 4)-phase multisystem nets (1987)
    Springer
    Mathematical geology 19 (1987), S. 793-805 
    Details
    ISSN: 1573-8868
    Schlagwort(e): Multisystem net ; phase diagram ; petrology ; topology
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Mathematik
    Notizen: Abstract Multisystem nets are topological analogs of real and potentially real phase diagrams which can be constructed given only the chemography of phases of interest. Combinatorial analysis of c-component (c + 4)-phase multisystems suggests the existence of [(c + 4)!/2] [2(c +4) − 2 (c + 4)] distinct nets. (c + 4)-phase multisystem nets are characterized by three different invariant point stability levels, four different reaction stability levels, and three invariant points along each univariant reaction. Invariant points at the intermediate stability level occur in two disjoint networks. Unlike (c + 3)-phase multisystems, in which all nets are related by transposition, (c + 4)-phase nets form distinct equivalence classes under transposition based on identities of those invariant points at the intermediate stability level. A position matrix is introduced to denote adjacency/connectivity relationships, and a relationship is suggested between the number of nets in each equivalence class under transposition and the number of ways of assigning stability levels to invariant points of an arbitrary position matrix.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00893017
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  • 64
    Unbekannt
    Habitat of Palaeozoic Gas in N.W. Europe : proceedings of a conference held at the Royal Society, London, on 11th and 12th February 1985 (1986)
    Edinburgh : Scottish Academic Press
    Details
    Schlagwort(e): Erdgas ; Geology, Stratigraphic -- Paleozoic ; North West Europe
    Beschreibung / Inhaltsverzeichnis: Regional Studies --- K. W. Glennie: Development of N.W. Europe’s Southern Permian Gas Basin / Geological Society, London, Special Publications, 23:3-22, doi:10.1144/GSL.SP.1986.023.01.01 --- A. D. Gibbs: Strike-slip Basins and Inversion: a possible model for the Southern North Sea Gas Areas / Geological Society, London, Special Publications, 23:23-35, doi:10.1144/GSL.SP.1986.023.01.02 --- J. C. M. Taylor: Gas Prospects in the Variscan Thrust Province of Southern England / Geological Society, London, Special Publications, 23:37-53, doi:10.1144/GSL.SP.1986.023.01.03 --- S. R. Tubb, A. Soulsby, and S. R. Lawrence: Palaeozoic Prospects on the Northern Flanks of the London-Brabant Massif / Geological Society, London, Special Publications, 23:55-72, doi:10.1144/GSL.SP.1986.023.01.04 --- L. V. Illing and A. E. Griffith: Gas Prospects in the ‘Midland Valley’ of Northern Ireland / Geological Society, London, Special Publications, 23:73-84, doi:10.1144/GSL.SP.1986.023.01.05 --- Michael J. Cope: An Interpretation of Vitrinite Reflectance Data From the Southern North Sea Basin / Geological Society, London, Special Publications, 23:85-98, doi:10.1144/GSL.SP.1986.023.01.06 --- Methods and Applications --- Marlies Teichmüller: Coalification and natural gas deposits in northwestern Germany / Geological Society, London, Special Publications, 23:101-112, doi:10.1144/GSL.SP.1986.023.01.07 --- M. D. Higgs: Laboratory Studies into the Generation of Natural Gas from Coals / Geological Society, London, Special Publications, 23:113-120, doi:10.1144/GSL.SP.1986.023.01.08 --- D. N. Clark: The Distribution of Porosity in Zechstein Carbonates / Geological Society, London, Special Publications, 23:121-149, doi:10.1144/GSL.SP.1986.023.01.09 --- J. K. Draxler and D. P. Edwards: Evaluation Procedures in the Carboniferous of Northern Europe / Geological Society, London, Special Publications, 23:151-167, doi:10.1144/GSL.SP.1986.023.01.10 --- S. A. Thorn and T. P. Jones: Application of Image Ray Tracing in the Southern North Sea Gas Fields / Geological Society, London, Special Publications, 23:169-186, doi:10.1144/GSL.SP.1986.023.01.11 --- Gas Field Studies --- T.P. Bushell: Reservoir Geology of the Morecambe Field / Geological Society, London, Special Publications, 23:189-208, doi:10.1144/GSL.SP.1986.023.01.12 --- Ron Bifani: Esmond Gas Complex / Geological Society, London, Special Publications, 23:209-221, doi:10.1144/GSL.SP.1986.023.01.13 --- M. W. Goodchild and P. Bryant: The Geology of the Rough Gas Field / Geological Society, London, Special Publications, 23:223-235, doi:10.1144/GSL.SP.1986.023.01.14 --- A. M. Conway: Geology and Petrophysics of the Victor Field / Geological Society, London, Special Publications, 23:237-249, doi:10.1144/GSL.SP.1986.023.01.15 --- T. J. Arthur, D. Pilling, D. Bush, and L. Macchi: The Leman Sandstone Formation in U.K. Block 49/28 Sedimentation, Diagenesis and Burial History / Geological Society, London, Special Publications, 23:251-266, doi:10.1144/GSL.SP.1986.023.01.16 --- A. ten Have and A. Hillier: Reservoir Geology of the Sean North and South Gas Fields, U.K. Southern North Sea / Geological Society, London, Special Publications, 23:267-273, doi:10.1144/GSL.SP.1986.023.01.17
    Seiten: Online-Ressource (XI, 276 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 0707304911
    URL: http://sp.lyellcollection.org/content/23/1
    Sprache: Englisch
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  • 65
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    Digitale Medien
    C2 + -Gewinnung mit integrierter Abtrennung von Stickstoff und Helium aus ErdgasVortrag von P. Butz auf dem Jahrestreffen der Verfahrens-Ingenieure, 19. bis 21. Sept. 1984 in München. (1985)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 57 (1985), S. 620-621 
    Details
    ISSN: 0009-286X
    Schlagwort(e): Erdgas ; Helium ; Stickstoff ; Ethan ; Kohlenwasserstoffe ; Prozeßführung ; Anlagenleistung ; Prozeßbeschreibung ; Verfahrensschema ; Anlagenbau ; Betriebserfahrungen ; Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/cite.330570712
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  • 66
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    Unbekannt
    High fluid pressures during regional metamorphism: Implications for mass transport and deformation mechanisms (1984)
    In:  J. Geophys. Res., Luxembourg, Am. Soc. Mech. Eng., vol. 89, no. 6, pp. 4344-4358, pp. L12311, (ISBN 0-471-26610-8)
    Details
    Publikationsdatum: 1984
    Schlagwort(e): Geol. aspects ; Crustal deformation (cf. Earthquake precursor: deformation or strain) ; Tectonics ; petrology ; JGR
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    BIBLIOGRAFIE SEISMOLOGIE
  • 67
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    Unbekannt
    S-C mylonites (1984)
    In:  J. Struct. Geol., Beijing, Inst. f. Theoret. Geodäsie, vol. 6, no. B5, pp. 617-638, pp. 2376, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1984
    Schlagwort(e): petrology ; Structural geology ; JSG
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  • 68
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    Unbekannt
    The generation and compaction of partially molten rock (1984)
    In:  J. Petrol., New York, August, vol. 25, no. 11, pp. 713-765, pp. 1610, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1984
    Schlagwort(e): Physical properties of rocks ; density ; petrology ; Volcanology ; Plate tectonics
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  • 69
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    Unbekannt
    Pressure-temperature-time paths of regional metamorphism: I. Heat transfer during the evolution of regions of thickened continental crust (1984)
    In:  J. Petrol., Münster, 3, vol. 25, no. 3, pp. 894-928, pp. L12311, (ISBN 0-471-26610-8)
    Details
    Publikationsdatum: 1984
    Schlagwort(e): Geol. aspects ; Geothermics ; PTt ; petrology ; Tectonics
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    BIBLIOGRAFIE SEISMOLOGIE
  • 70
    facet.materialart.
    Unbekannt
    Seismic reflectivity of mylonite zones in the crust (1984)
    In:  Geology, Kobe, 1, vol. 12, no. 5788, pp. 195-198, pp. 8010, (ISBN: 0534351875, 2nd edition)
    Details
    Publikationsdatum: 1984
    Schlagwort(e): Reflectivity ; Fault zone ; petrology
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  • 71
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    Unbekannt
    The magnitude, symmetry, and origin of upper mantle anisotropy based on fabric analyses of ultramafic tectonites (1984)
    In:  Geophys. J. R. astr. Soc., Taipei, Elsevier, vol. 76, no. 1, pp. 89-111, pp. RG2001, (ISBN: 0-12-018847-3)
    Details
    Publikationsdatum: 1984
    Schlagwort(e): Anisotropy ; Physical properties of rocks ; Geol. aspects ; Mineralogy ; petrology ; GJRaS
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  • 72
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    Digitale Medien
    Die selektive Gaspermeation im Vergleich mit konventionellen Entsäuerungsverfahren für Naturgase (1984)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 56 (1984), S. 944-945 
    Details
    ISSN: 0009-286X
    Schlagwort(e): Entsäuerung ; Erdgas ; Permeation ; Membranen ; Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/cite.330561220
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  • 73
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    Digitale Medien
    Computerized vision for the geologist (1983)
    Springer
    Mathematical geology 15 (1983), S. 3-23 
    Details
    ISSN: 1573-8868
    Schlagwort(e): Geology ; petrology ; geological maps ; geological surveys ; image analysis ; image processing ; binary images ; component labels ; phase labels ; erosion ; dilatation ; logical operations ; spatial operations ; GIAPP ; Prospector ; CHARAN ; SIMSAG
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Mathematik
    Notizen: Abstract The digital computer can be a tireless friend and assistant to the geologist. The computer has no innate intelligence, but given adequate programs to analyze and interrelate the information on maps, photos, surveys, and other material, the computer can serve as an analytical tool and consultant. To the geologist's qualitative knowledge, theories, and models can be added the possibility of the computer's mathematically precise numerical answers, confirming or refuting the original ideas. In the interactive mode in particular, a dialogue between the geologist and the computer is established, where the geologist and the computer can complement each other's abilities. The basic principles of processing two-dimensional geological data, such as maps, charts, photos, and survey results, are discussed. Some comparisons are also made between the rule-based methods of Prospector, developed at Stanford Research Institute, and the more intuitively guided image-based procedures of GIAPP, developed on the equipment at the National Research Council of Canada, in collaboration with the Geological Survey of Canada and the University of Ottawa.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01030073
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  • 74
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    Serpentinization faults and their role in the tectonics of slow spreading ridges (1981)
    In:  J. Geophys. Res., Heidelberg, 1, vol. 86, no. 5, pp. 11616-11622, pp. 8010, (ISBN: 0534351875, 2nd edition)
    Details
    Publikationsdatum: 1981
    Schlagwort(e): Fault zone ; Physical properties of rocks ; petrology ; water ; Plate tectonics ; JGR
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    BIBLIOGRAFIE SEISMOLOGIE
  • 75
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    Unbekannt
    Deformation-induced microstructures, paleopiezometers, and differential stresses in deeply eroded fault zone (1980)
    In:  J. Geophys. Res., New York, Conseil de l'Europe, vol. 85, no. 5, pp. 6269-6285, pp. B06307, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1980
    Schlagwort(e): Fault zone ; Geol. aspects ; petrology ; Structural geology ; Stress ; Crustal deformation (cf. Earthquake precursor: deformation or strain) ; JGR
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    BIBLIOGRAFIE SEISMOLOGIE
  • 76
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    Unbekannt
    Compressional wave velocities in rocks at high temperatures and pressures, critical geothermal gradients, and crustal low-velocity zones (1979)
    In:  J. Geophys. Res., Taipei, Elsevier, vol. 84, no. 1, pp. 6849-6857, pp. RG2001, (ISBN: 0-12-018847-3)
    Details
    Publikationsdatum: 1979
    Schlagwort(e): P-waves ; Earth model, also for more shallow analyses ! ; Velocity ; Physical properties of rocks ; Geol. aspects ; petrology ; Geothermics ; Low velocity layer ; JGR
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    BIBLIOGRAFIE SEISMOLOGIE
  • 77
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    Unbekannt
    Plate tectonics and sandstone compositions (1979)
    In:  Am. Assoc. Petrol. Geol. Bull., London, Geological Society, vol. 63, no. 20, pp. 2164-2182, pp. L11303, (ISBN 1-86239-117-3)
    Details
    Publikationsdatum: 1979
    Schlagwort(e): Plate tectonics ; Physical properties of rocks ; petrology
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    BIBLIOGRAFIE SEISMOLOGIE
  • 78
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    Digitale Medien
    Morphologically based sampling designs for zoned orthopyroxenes (1979)
    Springer
    Mathematical geology 11 (1979), S. 627-642 
    Details
    ISSN: 1573-8868
    Schlagwort(e): sampling ; crystal morphology ; petrology
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Mathematik
    Notizen: Abstract Compositional data of orthopyroxene crystals obtained by the electron microprobe may be biased unless zoning morphologies are taken into account in the sampling design. Statistical models (predictive or interpretative) based on such data are open to question because the input data, such as correlations, are spurious. In an attempt to propose sampling designs two established crystal zoning morphologies are considered which are (a) the concentric shell-type and (b) sectoral zonations. These zonational types lend themselves well to statistical population modeling and graphical interpretation provided assumptions of chemical invariance hold or are approximated by a stratified sampling design. The statistical designs may be regarded as limiting cases in the sense that relaxations of certain assumptions lead to other population models. Hypersthene crystals from a central portion of the mafic norite formation at the Strathcona Mine, Sudbury irruptive, are examined for zonation. It appears that the trace elements have a different zoning morphology than the major elements of hypersthene.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01031888
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  • 79
    Digitale Medien
    Digitale Medien
    Principal components analysis of three-way tables (1979)
    Springer
    Mathematical geology 11 (1979), S. 611-626 
    Details
    ISSN: 1573-8868
    Schlagwort(e): principal components analysis ; factor analysis ; organic geochemistry ; paleoecology ; petrology
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Mathematik
    Notizen: Abstract A three-mode principal components method allows visualization of the structural or taxonomic relationships within three-way data tables. The fundamental model includes three sets of eigenvectors and a “core matrix” relating the principal components of each mode. Formal relationships between the method and the usual principal components formulation allow calculation of “loadings” and “scores” for each mode; taken with the core matrix, these provide a number of points of view in graphical analysis of three-mode data. The model compares favorably with alternative formulations in terms of simplicity of computation, generality, and symmetry of operation among the modes. An organic geochemical example illustrates the method.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01031887
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  • 80
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    Ophiolites, seismic velocities and oceanic crustal structure (1978)
    In:  Tectonophys., Taipei, Elsevier, vol. 47, no. 1, pp. 131-157, pp. RG2001, (ISBN: 0-12-018847-3)
    Details
    Publikationsdatum: 1978
    Schlagwort(e): P-waves ; Earth model, also for more shallow analyses ! ; Physical properties of rocks ; Velocity ; Geol. aspects ; petrology
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    BIBLIOGRAFIE SEISMOLOGIE
  • 81
    Digitale Medien
    Digitale Medien
    Cooling of a convecting intrusive sheet (1978)
    Springer
    Mathematical geology 10 (1978), S. 301-310 
    Details
    ISSN: 1573-8868
    Schlagwort(e): Layered intrusions ; petrology ; thermal histories
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Mathematik
    Notizen: Abstract The complete description of the cooling of a layered intrusive sheet is mathematically complex since even the simplest conceivable model involves a moving boundary—the floor or base of the convecting portion of the intrusion for which the boundary conditions are second-order equations including partial derivatives. Numerical solutions for reasonable thermal parameters and initial conditions demonstrate that for most situations between 90 and 100% of the heat loss of the liquid region is through the roof. In certain circumstances the layered series—the crystallized position of the intrusion—actually supplies heat to the convecting region in the late stages of cooling.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02048493
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  • 82
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    The Earth's Crust (1977)
    Am. Geophys. Un.
    In:  Hannover, Am. Geophys. Un., vol. 20, no. XVI:, pp. 1-14, (ISBN: 1-4020-2968-3)
    Details
    Publikationsdatum: 1977
    Schlagwort(e): Velocity depth profile ; CRUST ; Velocity depth profile ; Moho ; Geochemistry ; petrology
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    BIBLIOGRAFIE SEISMOLOGIE
  • 83
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    Unbekannt
    A new model of the continental crust (1977)
    Am. Geophys. Un.
    In:  Bull., Polar Proj. OP-O3A4, The Earth's Crust, Hannover, Am. Geophys. Un., vol. 20, no. Subvol. a, pp. 289-317, (ISBN 0080419208)
    Details
    Publikationsdatum: 1977
    Schlagwort(e): Review article ; Velocity depth profile ; CRUST ; Modelling ; Velocity depth profile ; Moho ; Geochemistry ; petrology
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    BIBLIOGRAFIE SEISMOLOGIE
  • 84
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    Unbekannt
    Seismic velocities of rocks from the Ivrea-Verbano and Strona-Ceneri zones, northern Italy: A cross-section of the continental crust - New evidence from seismic velocities of rock samples (1976)
    In:  Tectonophys., Kobe, 1, vol. 33, no. 5788, pp. 145-165, pp. 8010, (ISBN: 0534351875, 2nd edition)
    Details
    Publikationsdatum: 1976
    Schlagwort(e): Velocity ; Geol. aspects ; Refraction seismics ; Deep seismic sounding (espec. cont. crust) ; petrology
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  • 85
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    Digitale Medien
    Mineral variation in anorthositic, troctolitic, and adamellitic rocks of the Barth Island layered structure in the Nain anorthosite complex, Labrador (1976)
    Springer
    Mathematical geology 8 (1976), S. 561-574 
    Details
    ISSN: 1573-8868
    Schlagwort(e): regression analysis ; trend analysis ; geochemistry ; petrology
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Mathematik
    Notizen: Abstract The Barth Island layered structure is an oval, 6 by 9 km body, consisting of rhythmically layered adamellitic rock in the center which grades outward through jotunite into troctolite. Farther outward the sequence repeats itself in reversed order, strongly reduced in magnitude and finer grained; the adamellitic zone is followed by jotunite which grades into coarse-grained leuconorite and into anorthosite of the Nain complex. The Barth Island structure, having an inverted conical base topped by a hemispherical depression, seems to represent a distorted sequence of rock layers with troctolite at the bottom, grading upward into adamellitic rocks which grade into anorthosite at the top. Trend-surface analysis demonstrates the regional variation of plagioclase and orthopyroxene compositions in the troctolite—adamellite sequence of the central part of the structure. The fits for the second- and third-degree surfaces are good and significant at the 99 percent level. The regression line for compositional variation in coexisting plagioclase and orthopyroxene in all analyzed rocks has a correlation coefficient of r2 = 0.78. The difference between the trends in the troctolite—adamellite sequence and the anorthosite—adamellite sequence is insignificant. The regression curve for compositional variation in coexisting orthopyroxene and olivine has a correlation coefficient of r2 = 0.98. The curve shows good correlation with the experimentally established partitioning curve of Medaris, which indicates that equilibrium conditions prevailed during formation of the olivine—ortho-pyroxene pairs. The results suggest that the troctolite—adamellite sequence and the anorthosite—adamellite sequence are products of fractional crystallization, possibly from the same parental magma.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01042994
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  • 86
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    Digitale Medien
    The use of correspondence analysis in the metallogenic study of ultrabasic and basic complexes (1976)
    Springer
    Mathematical geology 8 (1976), S. 669-681 
    Details
    ISSN: 1573-8868
    Schlagwort(e): classification ; factor analysis ; economic geology ; mineralization ; petrology
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Mathematik
    Notizen: Abstract Geological descriptions of unmineralized and mineralized ultrabasic and basic complexes were collected on a world-wide basis from published literature in the framework of the research project “Basimine.”Its aim is the discovery of controls governing the existence of mineralization in certain complexes and subsequently the development of working hypotheses for nickel prospection. Files were created containing geological and petrological data for each complex. In order to gain an understanding into the relationship existing between variables and complexes, correspondence analysis was applied to various data sets taken from the files. The results indicated criteria, either favorable or unfavorable, for the presence of mineralization in the complexes, and pointed out certain unmineralized complexes which could well be mineralized due to their position as regards known ore deposits in the plan of the factorial axes.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01031098
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  • 87
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    Digitale Medien
    Principal components analysis using the hypothetical closed array (1976)
    Springer
    Mathematical geology 8 (1976), S. 25-36 
    Details
    ISSN: 1573-8868
    Schlagwort(e): principal components analysis ; closure correlations ; geochemistry ; petrology
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Mathematik
    Notizen: Abstract The application of R-mode principal components analysis to a set of closed chemical data is described using previously published chemical analyses of rocks from Gough Island. Different measures of similarity have been used and the results compared by calculating the correlation coefficients between each of the elements of the extracted eigenvectors and each of the original variables. These correlations provide a convenient measure of the contribution of each variable to each of the principal components. The choice of similarity measure (variance-covariance or correlation coefficient)should reflect the nature of the data and the view of the investigator as to which is the proper weighting of the variables—according to their sample variance or equally. If the data are appropriate for principal components analysis, then the Chayes and Kruskal concept of the hypothetical open and closed arrays and the expected closure correlations would seem to be useful in defining the structure to be expected in the absence of significant departures from randomness. If the data are not multivariate normally distributed, then it is possible that the principal components will not be independent. This may result in significant nonzero covariances between various pairs of principal components.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01039682
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  • 88
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    Digitale Medien
    On the need, design, and prospects for an electronic information system serving igneous petrology (1975)
    Springer
    Mathematical geology 7 (1975), S. 363-371 
    Details
    ISSN: 1573-8868
    Schlagwort(e): data processing ; geochemistry ; petrology
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Mathematik
    Notizen: Abstract An information system is needed to restore access to published information, now so voluminous that suitable levels of familiarity with it cannot be maintained by conventional nonelectronic scholarly devices. The services of the system should be available to petrologists via mail or remote terminal, and should provide, as requested, either retrieval or reduction of data contained in its base. The base should contain chemical, geological, mineralogical, and petrographic information about specimens for which full descriptions have been published. Provisional plans for construction of such a base are briefly reviewed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02080495
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  • 89
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    Digitale Medien
    Analysis of geological events (1975)
    Springer
    Mathematical geology 7 (1975), S. 295-321 
    Details
    ISSN: 1573-8868
    Schlagwort(e): data processing ; data structure ; independent events ; paleontology ; petrology ; regional mapping ; stratigraphy ; structure
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Mathematik
    Notizen: Abstract Geological events, such as emplacement of granite or growth of slaty cleavage, may be ordered into a sequence by two methods. One is to assign each event a place in a time scale, such as years before the present, which amounts to assigning events an age designation from the set of real numbers. In ordering such a list, the algebra of real numbers applies. A second method is to determine the time relations of events in pairs, such as a fold is of type (S1, S2) or granite intrudes conglomerate. These binary relations between events may be used to order events into a sequence using the transitive properties of the relation “older than.” It is shown, however, that the binary relations between events do not follow the familiar rules for the algebra of real or integral numbers and it is necessary to erect a new system of relations called the “algebra of events.” The fundamental relation is “older than or equivalent to” and this may be used to define the relations “older than”, “younger than”, “equivalent to”, “incomparable to”, and “covers.” The essential difference from the algebra of integers is that the reflexive relation (“equal to”) is replaced by two such relations (“equivalent to” and “incomparable to”) in the algebra of events. A number of binary relations between events may be assembled into an event matrix which is basically a truth table for the relation “older than.” This may be ordered and stacked by operations termed ORDER and STACK. The relationship of each event to every other event may be determined by simple inspection of an ordered, stacked matrix, and from this a geological history may be assembled. If there are contradictions in the field data, ordering into a proper sequence is impossible and may be detected. If there are ambiguities in the field data, there are several different orders that are proper sequences so that the event matrix may be ordered. However, the ambiguities occur as voids in the stacked matrix.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02081703
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  • 90
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    Digitale Medien
    Some problems of interpreting the correlations between the modal variables in granitic rocks (1974)
    Springer
    Mathematical geology 6 (1974), S. 245-258 
    Details
    ISSN: 1573-8868
    Schlagwort(e): correlation between proportions ; petrology
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Mathematik
    Notizen: Abstract Correlation coefficients of modal variables from several suites of granitic rocks have been calculated and tested for significance using the Chayes-Kruskal and Chayes methods. The results show that although Chayes' remaining-space transformation does, in general, weaken the original proportion correlations, the positive and low-negative original proportion correlations tend to increase in absolute value because of a tendency of positive increment of the covariance by such transformation. However, no satisfactory procedure for choosing the variable to be transformed (V2)could be determined, and testing of the significance of remaining-space correlations is found to be highly problematic. It is shown also that the Vistelius-Sarmanov procedure of calculation of correlation coefficients from closed-table data does not effectively eliminate the closure effect. It is concluded that assigning statistical significance to the correlation coefficients between modal variables is, in general, unsatisfactory, except where the number of variables ⩾8,the sample size is large (say, ⩾30),and there is no negative element in the variance vector of the corresponding open variables.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02082890
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  • 91
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    The 'Moho' as a transition zone (1973)
    In:  Geophys. Surv., Luxembourg, Conseil de l'Europe, vol. 1, no. 3, pp. 195-216, pp. L19605, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1973
    Schlagwort(e): Review article ; Seismics (controlled source seismology) ; petrology ; Deep seismic sounding (espec. cont. crust)
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  • 92
    Digitale Medien
    Digitale Medien
    Thoughts on use of principal component analysis in petrogenetic problems (1973)
    Springer
    Mathematical geology 5 (1973), S. 341-350 
    Details
    ISSN: 1573-8868
    Schlagwort(e): principal components analysis ; geochemistry ; petrology
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Mathematik
    Notizen: Abstract The use of principal component analysis in studying chemical trends in volcanic rock suites is described. It is suggested that eigenvectors generated from a correlation matrix, rather than a covariance matrix, could be used in this context. In the latter situation many elements are swamped by silicon's numerical size and range. In the former situation the alkalies and titanium begin to show their true importance.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02111985
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  • 93
    Digitale Medien
    Digitale Medien
    Preliminary assessment of a nonlinear mapping algorithm in a geological context (1973)
    Springer
    Mathematical geology 5 (1973), S. 39-57 
    Details
    ISSN: 1573-8868
    Schlagwort(e): classification ; cluster analysis ; dimensionality reduction ; mapping ; multivariate analysis ; principal-components analysis ; general geology ; geochemistry ; paleontology ; petrology ; stratigraphy
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Mathematik
    Notizen: Abstract A new algorithm has been developed by J. W. Sammon for the nonlinear-point mapping of high-dimensional data in two dimensions such that the inherent structure of the data is approximately preserved. This paper describes results using several sets of geologic data including stratigraphic thickness, petrographic modal analysis, and morphological or geochemical measurements. Comparisons are made with hierarchical cluster analysis using dendrogram representation. Initial results are encouraging and suggest that the technique could have widespread geological applications.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02114086
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  • 94
    Digitale Medien
    Digitale Medien
    Estimation of parameters in petrologic materials balance equations (1973)
    Springer
    Mathematical geology 5 (1973), S. 225-236 
    Details
    ISSN: 1573-8868
    Schlagwort(e): estimation ; materials balance ; mathematics ; mixing equations ; geochemistry ; petrology
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Mathematik
    Notizen: Abstract A rigorous treatment of the least-squares estimation of the parameters in petrologic materials balance equations is developed to take into account the uncertainties inherent in the chemical analyses. The choice of the optimal estimation procedure for a particular problem is dependent upon the extent of the petrogenetic understanding of the exact nature of the materials balance involved. Some of the complications entailed in obtaining least-squares estimates are illustrated by the examples of magmatic differentiation and metamorphic reactions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02111812
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  • 95
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    Digitale Medien
    A geomathematic investigation of syntexis in a Gabbroic formation (1973)
    Springer
    Mathematical geology 5 (1973), S. 321-339 
    Details
    ISSN: 1573-8868
    Schlagwort(e): factor analysis ; Fourier analysis ; mapping ; petrology
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Mathematik
    Notizen: Abstract Mathematical methods were employed in an investigation of syntexis in the “Gabbro di Sondalo,” a mafic igneous formation in the Central Alps (Italy). A set of 100 specimens was selected according to sampling criteria and analyzed by X-ray fluorescence for eight elements; Q-mode and R-mode factor analysis then was applied to these data. Results of the computations indicate that the general trend of differentiation is related to the syntexis of gneissic wall rocks (“Gneiss del Monte Tonale”) in the mafic melt. Ca and Mg are abundant in the gabbro, and Si and K in the gneiss; the independent variation trend of Fe and Ti may be related to a differentiation episode due to a magmatic phase. Spatial representation of multivariate data on differentiation also was performed on the main elements and a picture of the trend of syntexis was mapped.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02111984
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  • 96
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    Digitale Medien
    Effect of trends on correlation in open and closed three-component systems (1972)
    Springer
    Mathematical geology 4 (1972), S. 317-330 
    Details
    ISSN: 1573-8868
    Schlagwort(e): linear correlation ; mapping ; trend analysis ; general geology ; mineralogy ; petrology
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Mathematik
    Notizen: Abstract It is well known among geologists that closure of an open-number system, as when stratigraphic rock thicknesses are converted to percentages, introduces correlations among the components even in the absence of correlations in the open system. In closed three-component systems the covariances are single-valued functions of the closed variances and are exactly predictable. If the open system has “inherent” correlation (point correlations) among its components the corresponding closed covariances reflect their presence in a predictable manner. If areal trends are present in the open system, the open covariances are themselves affected, but this “trend effect” can be completely removed to recover the initial point correlations among the components. Areal trends in open systems strongly influence the structure of the closed variance-covariance matrices, and the situation becomes increasingly complicated if the open system has both point correlations and areal trends. The paper considers the problems involved, and includes Monte Carlo runs to compare computed and predicted variances and covariances as data sets are followed from open systems with correlation but no trend to the closed equivalent of open systems with point correlations and trends.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02114093
    Standort Signatur Erwartet Verfügbarkeit
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  • 97
    Digitale Medien
    Digitale Medien
    Operator error in petrographic point-count analysis: A theoretical approach (1972)
    Springer
    Mathematical geology 4 (1972), S. 35-43 
    Details
    ISSN: 1573-8868
    Schlagwort(e): data processing ; sampling ; statistics ; mineralogy ; petrology ; sedimentology
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Mathematik
    Notizen: Abstract Operator error in petrographic point-count analysis introduces bias into the estimates of proportion in a thin section. A correction for this bias, leading to an unbiased estimator of the true proportion in that thin section, is here proposed. Operator error also affects the confidence interval, and in this situation, too, an adjustment is possible. The approach proposed requires that the probabilities associated with operator error, categorized into A-type and B-type errors, are known or assumed. The A-type operator error tends to underestimate the true proportion in a thin section, whereas the B-type operator error tends to overestimate it.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02083191
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  • 98
    Digitale Medien
    Digitale Medien
    Ideal granite and its properties. I. The stochastic model (1972)
    Springer
    Mathematical geology 4 (1972), S. 89-102 
    Details
    ISSN: 1573-8868
    Schlagwort(e): crystallization ; stochastic model ; petrology
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Mathematik
    Notizen: Abstract Investigation of granitic rocks in the search for hidden ore deposits, restoration of their history, and understanding their special properties requires comparison of intrusive bodies. Comparisons are best made to some standard. The conception of an ideal magmatic granite as a standard is introduced in this paper. Investigation indicates that sequences of quartz grains potassium feldspars, and plagioclases of an ideal magmatic granite have definite mathematical properties.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02080295
    Standort Signatur Erwartet Verfügbarkeit
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  • 99
    Digitale Medien
    Digitale Medien
    Computer program to analyze directional data, based on the methods of Fisher and Watson (1972)
    Springer
    Mathematical geology 4 (1972), S. 177-202 
    Details
    ISSN: 1573-8868
    Schlagwort(e): cluster analysis ; factor analysis ; mapping ; statistics ; petrology ; structure
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Mathematik
    Notizen: Abstract Based on the methods of Fisher and Watson,Fortran iv computer programs are presented for the following analyses of directional observations on the sphere: (1) to determine if points are randomly distributed; (2) to estimate the azimuth and inclination of the center (mean direction) of a cluster and to estimate the precision (closeness) with which points are clustered; (3) to determine if two or more clusters have the same mean direction; (4) to determine if two clusters have the same precision of clustering; and (5) to locate the pole of a greatcircle girdle of points. Limitations of these analyses for undirected directional observations on the hemisphere also are given.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02311717
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  • 100
    Digitale Medien
    Digitale Medien
    Quantitative discrimination between magmatic units of the singhbhum granite (1971)
    Springer
    Mathematical geology 3 (1971), S. 123-133 
    Details
    ISSN: 1573-8868
    Schlagwort(e): cluster analysis ; distance functions ; mineralogy ; petrology ; structure
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Mathematik
    Notizen: Abstract The weight-percent values of four mineralogic variables (quartz, K feldspar, color index, and muscovite) for 10 sets of granitic rocks (20–50 samples in each set) from magmatic units of the Singhbhum granite were used for (1) computation of the Mahalanobis' generalized distance functions (D 2) between all pairs of the 10 sets, (2) testing significance of the difference between the multivariate means, and (3) computation of the linear discriminant functions between all possible pairs of the sets. The 10 data sets are for six magmatic units which belong to three successive but closely related phases of emplacement. The multivariate means for all sets are significantly different except for those between two of the sets of phase I. Cluster analysis on the basis of theD 2 values enables the 10 sets to be placed into four distinct groups. Group A includes two subgroups, one of which consists of two sets representing typical members of phase I; the other subgroup includes two sets which are typical of phase II. Group B includes two sets which are typical of phase III. The other four sets do not group with the typical representatives of the three phases, probably because of certain special conditions of their emplacement. A separate series ofD 2 computation from the same data, but excluding the color index, was unsuccessful in making the four aberrant sets group with the typical members of the respective phases. Efficient LDF's could be determined for discrimination between most pairs of the 10 sets of granite rocks.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02045956
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