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Browsing Геология России by Title
Now showing items 5920-5939 of 39126
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(1990)Clayton and others have made systematic determinations of the isotopic composition of meteorite minerals, opening the way for a genetic interpretation. The predominant minerals in meteorites are pyroxenes and olivines; we ...
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(1999)Hydrocarbon compositions and their carbon isotopic data for 94 natural gas samples were combined with the results of thermal simulation experiments to complete a comprehensive study of maturity, genetic types and sources ...
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(2004)Six Berriasella species (Ammonoidea) found in the Berriasian sediments of the Crimean Mountains are B. jacobi Maz., B. calisto (d'Orb.), B. subcalisto (Touc.), B. oppeli (Kil.), B. moesica Nik. et Man. and B. chomeracensis ...
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(1997)This is the first reliable record of the genus Platanus based on pistillate heads and leaves from the Paleocene of Western Kamchatka. The leaves were previously described as P. basicordata Budants. A new species, P. ...
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(2005)In preparation to the experimental results which will be available in the future, we study geo-neutrino production for different models of mantle convection and composition. By using global mass balance for the Bulk Silicate ...
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(1999)The Riphean and Vendian are characterized as a distinctive stage in the evolution of the biosphere. It is demonstrated that benthic and pelagic biotas of that time were sources of hydrocarbons in Precambrian sedimentary strata.
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(Федеральное государственное бюджетное учреждение науки Институт земной коры Сибирского отделения Российской академии наук, 2017)
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(2012)This study presents data on the geochemical composition of boiling mud pools at the Mutnovsky volcano. The physicochemical characteristics of the pools and the concentrations of major, minor and trace elements in pool ...
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(1998)A precise and accurate chronological framework is crucial to study the dynamics of a variety of phenomena which occurred during the last 45,000 years. Although the 14C dating method has been widely applied since the 1950s, ...
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(2002)The Altai orogen (northwest China) represents the southwestern margin of the Central Asian Orogenic Belt. Geochemical and Nd3.4 to 1.8 Ga, and ISr = 0.7106 to 0) and ISr (0.7110.7051). Voluminous syn-orogenic granitoids ...
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(1992)Tremendous expansion of high-technology applications of rare metals and specialty minerals requires periodic reassessment of their geological sources, keeping in mind the long-range technological potential of all hi-tech ...
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(2003)The paper presents a systematic analysis of the genetic conditions and principal features of zoning in orebodies and related wall-rock aureoles at low- and medium-temperature vein hydrothermal deposits from the standpoint ...
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(1995)Primary basaltic magmas are accumulated after they have migrated through extensive regions of residual mantle. The migrating magma may react to various degrees with the residuum, so that the composition of the primary magma ...
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(2004)Distribution of some microelements was investigated in the surface layer of bottom sediments in the Seliger lacustrine system. Organic matter exerts an influence on Zn and Cd accumulation. An anthropogenic impact on the ...
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(2001)Geochemical barriers in the soils of different ecosystems (from dry steppes to mountainous tundra) of the Baikal region are examined. Qualitative and quantitative characteristics of the accumulation of chemical elements ...
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(1986)Geochemical barriers are zones in the Earth's crust with sharp physical or chemical gradients and they are often associated with concentrations of elements, sometimes to the extent of forming ore deposits. Four fundamental ...
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(2004)A number of polyphase or single-phase ceramic waste forms have been considered as options of the disposal of nuclear waste in geological repositories. Of critical concern in the scientific evaluation of these materials is ...
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(2004)In July 2001, samples of surface suspended particulate material (SPM) of the Irtysh river in its middle and lower reaches (from Omsk City to the confluence with the Ob river) and its main tributaries were collected (18 ...
Now showing items 5920-5939 of 39126