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Browsing ELibrary by Title
Now showing items 5300-5319 of 21821
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(2004)The nucleation of H2O bubbles in magmas has been proposed as a trigger for volcanic eruptions. To determine how bubbles nucleate heterogeneously in silicate melts, experiments were carried out in which high-silica rhyolitic ...
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(2002)Abstract— We investigate heterogeneous nucleation and growth of graphite on precondensed TiC grains in the gas outflows from carbon-rich asymptotic giant branch (AGB) stars employing a newly-derived heterogeneous nucleation ...
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(2003)Modeling the plastic deformation and texture evolution in halite is challenging due to its high plastic anisotropy at the single crystal level and to the influence this exerts on the heterogeneity of deformation over halite ...
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(2002)An electron paramagnetic resonance (EPR) investigation was performed on the insoluble organic matter from the Orgueil and Murchison meteorites and on terrestrial coals with similar elemental composition. A complementary ...
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(1999)Distribution of solar, cosmogenic, and primordial noble gases in thin slices of Murchison, Murray, and Nogoya CM carbonaceous chondrites was determined by the laser microprobe analysis so as to put some constraints on the ...
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(2003)In the first known kinetic application of the technique, synchrotron 57Fe-Mossbauer spectroscopy was used to follow the rate of heterogeneous electron transfer between aqueous reagents and a solid phase containing Fe. The ...
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(2002)The existence of heat-producing elements (U, Th, K) and their highly heterogeneous distribution in the Earth's mantle suggests a link between thermal and chemical properties of the mantle. Previous studies have shown that ...
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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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(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, ...
Now showing items 5300-5319 of 21821