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Browsing ELibrary by Title
Now showing items 6280-6299 of 21934
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(1999)The ca. 2.0-Ga-old, 600-m-thick upper Zaonezhskaya Formation near Lake Onega, NW Russia, contains unusually high concentrations of Corg (up to 98%), averaging around 25%. The formation contains an estimated 25×1010 tonnes ...
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KARPINSKIOSAURUS ULTIMUS (SEYMOURIAMORPHA, PARAREPTILIA) FROM THE UPPER PERMIAN OF EUROPEAN RUSSIA (2002)The genus Raphanodon Ivachnenko, 1987 (Leptorophidae, Seymouriamorpha) is not a valid taxon, since its type species Nycteroleter ultimus Tchudinov et Vjuschkov, 1956 is assigned to the genus Karpinskiosaurus. The cranial ...
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(2001)The paper is devoted to the karst role in the formation of aureoles of kimberlite indicator minerals (KIM) and diamond placers in the modern alluvium of the Muna-Markha interfluve. Its territory is open, i.e., the Lower ...
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(1989)Most oil and gas pools found in the Lena-Tunguska oil and gas province of the Siberian craton are known to be confined to granular or fractured-granular reservoir rocks in clastic sandstone-siltstone strata. Such rocks ...
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(2003)The seismic CMP is the main method of the geological sections study in the Black Sea, because drilling data on the deep basin part are scarce. Accordingly, stratigraphic subdivisions of sedimentary cover can be defined and ...
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(1999)Most of the Kharchinskii and Zarechnyi products, as well as those of the Kharchinskii cinder cones, are magnesian rocks. Mineralogical data suggest that both the basaltic and the andesitic magma were rich in water (≥3-4 ...
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(1999)This paper presents the results of studying the spatial distribution and structural setting of magnesian basalts and andesites in the Northern group of Kamchatkan volcanoes and in the junction zone of the Kuril-Kamchatka ...
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KIMBERLITE MELTS RICH IN ALKALI CHLORIDES AND CARBONATES: A POTENT METASOMATIC AGENT IN THE MANTLE (2004)Kimberlite magmas, as the deepest probe into Earth's mantle (>150 km), can supply unique information about volatile components (hydrogen, carbon, chlorine, sulfur) in mantle-derived melts and fluids. All known kimberlite ...
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(2004)A combined petrological, geochemical, and mineralogical study of Kimberlites of eastern Priazov'e was described. A reliable criteria for the identification of these rocks, to characterize their sources, and to assess their ...
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KINEMATIC AND ANALOG MODELING OF 3-D EXTENSIONAL RAMPS: OBSERVATIONS AND A NEW 3-D DEFORMATION MODEL (2002)We present results of kinematic and dry-sand analog models of hanging wall folding over an extensional ramp-flat system containing complementary strike bends. The kinematic models illustrate that differential structural ...
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(2001)An analysis was made of kinematic and morphometric characteristics of zones of overlapping spreading centers - structures illustrative of spreading ridges with fast and intermediate spreading rates. Three levels of overlap ...
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(2004)Results of fluid dynamical experiments are presented to model the kinematics of lithospheric subduction in the upper mantle. The experiments model a dense high-viscosity plate (subducting lithosphere) overlying a less dense ...
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(2003)The Vendian-Early Cambrian, Middle Cambrian, and Early Ordovician volcanosedimentary deposits of the Martaiga Block of the Kuznetsk Alatau paleoisland arc (55.5° N, 88° E) have been investigated paleomagnetically. Their ...
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(2004)The abundances of 18O and deuterium in the present and past hydrologic cycle have proven to be an important tool in Earth systems science. In contrast, the abundance of 17O in precipitation has thus far been assumed to ...
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(2003)Equilibrium and kinetic Fe isotope fractionation between aqueous ferrous and ferric species measured over a range of chloride concentrations (0, 11, 110 mM Cl−) and at two temperatures (0 and 22°C) indicate that Fe isotope ...
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(2002)Application of the Fe isotope system to studies of natural rocks and fluids requires precise knowledge of equilibrium Fe isotope fractionation factors among various aqueous Fe species and minerals. These are difficult to ...
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(2002)The mass-dependent fractionation laws that describe the partitioning of isotopes are different for kinetic and equilibrium reactions. These laws are characterized by the exponent relating the fractionation factors for two ...
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(1997)A growing body of evidence reveals that much of the silica that crystallizes at the Earth's surface is a finely intergrown mixture of quartz and moganite. To better understand the behaviour of both solid and aqueous silica ...
Now showing items 6280-6299 of 21934