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Browsing ELibrary by Title
Now showing items 6885-6904 of 21821
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(2002)Information on the textures, mineralogy, and chemistry of rocks was used to study the behavior of material during dislocation metamorphism of Al- and Fe-rich metapelites in the Yenisei Range. Metamorphism of the ...
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(1995)We have examined the steady-state upper mantle model for helium, neon, argon, and xenon following the mass transfer approach presented by Kellogg and Wasserburg (1990) for helium and Porcelli and Wasserburg (1995a) for ...
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(1995)We present a model of steady-state transport of Xe through the upper mantle with inputs from an undergassed lower mantle by mass transport without fractionation and subducted atmospheric gases. The model is explored using ...
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(2002)We have measured with an electron microprobe the Mg, Al, Si, Ca, Ti, Mn, and Fe contents of five strongly heated stony cosmic spherules (sCS) from the South Pole water well. We have also measured the isotopic compositions ...
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(2004)Distinct correlation is established between Sr and Ba content in Devonian and Carboniferous calciferous-dolomite formation and these elements' mass-flows in subsurface waters. Assuming that the main source of Sr in the ...
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(2002)An area of massive barite precipitations was studied at a tectonic horst in 1500 m water depth in the Derugin Basin, Sea of Okhotsk. Seafloor observations and dredge samples showed irregular, block-to column-shaped barite ...
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(1999)Large (=<2 mm) chromite grains are present in IIIAB iron meteorites and in the main-group pallasites (pmg), closely related to high-Au IIIAB irons. Pallasites seem to have formed by the intrusion of a highly evolved metallic ...
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(1999)The Urals is one of the most important regions in the world for the occurrence of volcanogenic massive sulphide deposits. Here are found 90 deposits of this type: 32 of them are worked out already, 16 are being worked now, ...
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(2003)The main pyrite deposits in Ural region are concentrated in Tagilskaya and Magnitogorskaya metallogenic zones formed in middle Paleozoic period. These structures have length of 1,500 km and width of several tens km. They ...
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(2001)We present an analytical form of the layer propagator matrix for the response of a locally incompressible, layered, linear-viscoelastic sphere to an external load assuming that the initial density stratification ρ0(r) ...
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(2003)Stromatolites are internally laminated organosedimentary structures that result from the environmental interactions of Benthic Microbial Communities. They have been traditionally described and classified either by quasi-Linnean ...
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(2003)The meaning of the term Mathematical Geology was contentious at the founding meeting of IAMG in 1968 and has remained so ever since. In North American usage, it has primarily meant statistical applications in geology, and ...
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(1987)According to the model previously derived, nodules in the surface layer of sediment are formed by deposition, dehydration and crystallization of colloidal iron and manganese hydroxide on various nuclei resting on the surface ...
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(2001)A new method has been proposed for the mathematical modeling of the effective elastic constants of a geological medium with arbitrary one, two or three oriented systems of cracks. The method imposes no restrictions as to ...
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(1990)There have been many attempts at modeling hydrothermal argillization by various methods, including computer techniques. In this paper we describe the computer modeling of metasomatic clayey columns developing on rocks of ...
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(1989)The authors used computer graphics to develop models of geologic sections in areas of intersection between fold structures of different age when traces of the intersection of the axial planes of sequentially formed structures ...
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(2000)A new approach is presented for mathematical modeling of stable carbon isotope ratios in hydrocarbon gases based on both theoretical and experimental data. The kinetic model uses a set of parallel first-order gas generation ...
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(1989)Several published methods for calculating the variation in isotopic ratios in open systems involve a description of the partitioning among phases of simple ratios of the concentrations of components in coexisting phases. ...
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(2001)A new method is proposed for establishing effective thermoelastic constants as functions of pressure and temperature in rocks. The method is based on generalisation of the method of conventional moment functions, using ...
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(1996)A study of the sorption capacity of clay soils sorption capacity regarding heavy metals has made it possible to quantify the procedure for the determination of migration process parameters, and on the basis of them to make ...
Now showing items 6885-6904 of 21821