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Browsing Геология России by Title
Now showing items 6620-6639 of 39126
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(1996)The ability of modern Raman microprobes to determine the crystallinity of zircon with a lateral resolution of about 1 μm and a volume resolution of less than 5 μm3 opens up new opportunities for correlating structural, ...
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(2004)This contribution primarily uses X-ray photoelectron spectroscopy (XPS) to better understand mechanisms for coupled sorption-reduction of aqueous UVI by ferrous micas. Additional information was obtained with X-ray absorption ...
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(1989)One of the most effective methods of studying the surfaces of particles in samples of the lunar regolith is X-ray photoelectron spectroscopy. In this investigation, an ES-2401 instrument was used for X-ray photoelectron ...
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(PANGAEA, 1997-05-03)Species composition and spatial distribution of heterotrophic algae were studied in the Black Sea in autumn 1992. Total phytoplankton biomass varied during that period from 8 to 30 g/m**2. Autotrophic species Ceratium fusus ...
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(2005)Garnet-facies continental mantle is poorly understood because the vast majority of mantle xenoliths in continental basalts are spinel peridotite. Peridotite xenoliths from Vitim (southern Siberia) and Mongolia provide some ...
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(1998)The similarity of the Lu-Hf and Sm-Nd isotope system during most mantle differentiation processes makes the combination of 176Hf/177Hf and 143Nd/144Nd a very sensitive indicator of a select number of processes. This paper ...
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(2000)Three ordinary chondrites, Forest Vale (H4), Ste. Marguerite (H4) and Richardton (H5) have been studied with 182Hf-182W system (t1/2=9 million years [m.y.]) in order to provide constraints on the initial 182Hf/180Hf for ...
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(2001)We report the first Sm-Nd and Rb-Sr isotopic analyses of silicate inclusions in four IIE iron meteorites: Miles, Weekeroo Station A and B, and Watson. We also report the Hf-W isotopic composition of a silicate inclusion ...
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(2002)We have constrained the residence of high field strength elements (Nb, Ta, Zr, Hf, Ti) in metasomatised peridotite xenoliths in basalts from SE Siberia using high-precision electron-microprobe analyses of accessory Ti-rich ...
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(1989)Detailed stratigraphic schemes of the Upper Cretaceous sediments in the Caucasus allowed us to identify the presence of hiatuses and intraformational erosion surfaces based on the omission of one or another stratigraphic ...
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(1990)Recent progress in the theory and methods of geomechanics has led to a clear understanding of previously unknown properties of the rock medium, particularly its block structure and structural hierarchy. The new theory holds ...
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(1988)The structure of the stress field is studied around a frictional shear fault on the basis of a theoretical solution. The hierarchical properties of tectonic stress fields are discussed. A method is proposed for the separation ...
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(1989)The pattern of relationships between characteristics scales in the earth's structure discovered by M.A. Sadovskiy and analyzed in his publications pointed the way for a new line of geophysical research. An interesting ...
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(1995)Using an iron hydroxide precipitation to concentrate the rare earth elements it was possible to obtain precise Nd isotopic data on ultramafic rocks. Four samples of unserpentinized harzburgite from the Voykar ophiolite, ...
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(PANGAEA, 1994-02-17)
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(2003)Boron is a typical lithophile element characterized by a significant accumulation in the Earth's crust (15 ppm) relative to the primitive mantle (0.6 ppm) [1]. In magmatic systems, boron behaves as an incompatible element ...
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(1998)Both (reduced) type I and (oxidized) type II chondrules from the primitive chondrites Allende, Semarkona, and Bishunpur, were analysed with ion microprobe for the carbon and hydrogen concentrations of their silicates. The ...
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(2001)Diffuse emissions of CO2 are known to be large around some volcanoes and hydrothermal areas. Accumulation-chamber measurements of CO2 flux are increasingly used to estimate the total magmatic or metamorphic CO2 released ...
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(1998)Surface analysis by X-ray photoelectron spectroscopy (XPS) in combination with Ar etching was performed on a lunar regolith sample from the Luna 16 drill-core. The sample contains only ~10% of glass spherules; these are ...
Now showing items 6620-6639 of 39126