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Геология России: Recent submissions
Now showing items 1941-1960 of 42285
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(2006)The possibility that some mantle plumes may carry a geochemical signature of core/mantle interaction has rightly generated considerable interest and attention in recent years. Correlated 186Os-187Os enrichments in some ...
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(2006)We present new ultra-high precision 142Nd/144Nd measurements of early Archaean rocks using the new generation thermal ionization mass spectrometer Triton. Repeated measurements of the Ames Nd standard demonstrate that the ...
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(2006)A set of Palaeozoic diopside-titanite veins are present in Mesoproterozoic metagranites and metasediments that constitute the basement (Mt Painter Inlier) of the Adelaide Fold Belt (South Australia). These massive veins ...
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GRAVITATIONAL DEPLETION OF THE EARLY EARTH'S UPPER MANTLE AND THE VIABILITY OF EARLY PLATE TECTONICS (2006)Numerical modelling of stirring of subducted mafic (oceanic) crust in the hot early mantle yields an upper mantle strongly depleted of mafic components due to gravitational settling, while the lower mantle becomes marginally ...
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(2006)Recent developments in integrated high-resolution stratigraphy and astronomical tuning of continuous deep marine successions invalidate arguments against the designation of unit stratotypes for global stages, the basic ...
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(2006)In order to better interpret the Martian surface weathering-related mineralogy, we focused on a relevant analogue of the Martian subsurface in terms of lithology and paleoclimate: the Jurassic-aged Ferrar dolerite (Priestley ...
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(2006)New zircon U-Pb ages are proposed for late Early and Middle Triassic volcanic ash layers from the Luolou and Baifeng formations (northwestern Guangxi, South China). These ages are based on analyses of single, thermally ...
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(2006)The 26 December 2004 Sumatra-Andaman earthquake (Mw 9.0-9.3) is the greatest earthquake of the modern seismological era. The rupture characteristics of the earthquake, particularly in the Andaman-Nicobar region, are not ...
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(2006)The determination of the oxidation states of copper and iron in sulfides, and chalcopyrite (CuFeS2) in particular, using 2p X-ray photoemission spectroscopy (XPS) and L2,3-edge X-ray absorption spectroscopy (XAS) is ...
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(2006)Various iron-bearing primary phases and rocks have been weathered experimentally to simulate possible present and past weathering processes occurring on Mars. We used magnetite, monoclinic and hexagonal pyrrhotites, and ...
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(2006)Elastic anomalies that accompany cation ordering and displacive phase transitions can be understood in terms of coupling between strain components and the driving order parameter in Landau free energy expansions. Non-convergent ...
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(2006)The abundance of geodetic and seismic data recording postseismic deformation following the 2004 Parkfield earthquake provides an unprecedented opportunity to resolve frictional properties on the Parkfield section of the ...
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(2006)Although it is widely believed that production of organic compounds by Fischer-Tropsch synthesis and related processes occurs in many geologic environments, unambiguous identification of compounds with an abiotic origin ...
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(2006)We combine mineralogical, stable isotope and organic biomarker data to understand the role of prokaryote activity in supergene reactions within submarine hydrothermal sulfidic sediments. Data are presented for two adjacent ...
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(2006)Earth's largest reactive carbon pool, marine sedimentary organic matter, becomes increasingly recalcitrant during burial, making it almost inaccessible as a substrate for microorganisms, and thereby limiting metabolic ...
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(2006)This study presents a pre-eruptive magma storage model for the rhyodacite and andesite magmas erupted during the 3430 yBP caldera-forming eruption of Aniakchak volcano, Alaska, derived from phase equilibria experiments and ...
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(2006)Methane and other hydrocarbons fluxing upward through deep-marine sediment may strongly impact the cycling of Ba near the seafloor. Piston cores across two mud volcanoes in the northern Gulf of Mexico (GOM) were therefore ...
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(2006)Diatom silica (frustules) are a form of biogenic opal and contain oxygen isotopes that are being increasingly used in palaeoclimate studies. Frustules are comprised of an inner tetrahedrally bonded silica skeleton (Si-O-Si) ...
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(2006)We review the main results, with several new analyses, obtained in recent times about the structure, present dynamics and hazard evaluation at Somma-Vesuvius volcanic complex. We present a global review and interpretation ...
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(2006)We have investigated the transfer of oxygen isotope signals of diatomaceous silica (δ18Odiatom) from the epilimnion (0-7 m) through the hypolimnion to the lake bottom (~20 m) in freshwater Lake Holzmaar, Germany. Sediment-traps ...
Now showing items 1941-1960 of 42285