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Now showing items 14065-14084 of 40116
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(2001)Optical spectra are presented for seven oxygen based, four-coordinated Fe2+ bearing minerals, eudialyte, gehlenite, genthelvite, gillespite, pellyite, spinel, and staurolite, and two five-coordinated Fe2+ minerals, ...
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(2001)We used a combination of in situ attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy and X-ray absorption fine structure (XAFS) spectroscopy to conduct molecular scale studies on Pb(II)-sulfate ...
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(2004)Infrared (IR) spectra of phases found in calcium-aluminum rich inclusions in meteorites are incomplete, yet such data are needed to ascertain the mineralogy of astronomical environments. To better characterize the system ...
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(2004)Numerous spectroscopic techniques have been applied to the epidote minerals to characterize their structure and crystal chemistry. The substitution of transition metal ions Mn, Cr, and V, besides Fe, in the different ...
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(1999)Abstraet~Mn-substituted goethite was synthesized and the interaction between arsenite (As(III)) and Mn-substituted goethite was investigated by both solution chemistry and X-ray adsorption near edge structure (XANES) ...
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(IOP Publishing, 2015)The paper considers the techniques for continuous monitoring of samples and rocks destruction using the parameters of the measured electromagnetic signals which are generated in the destructive processes. The block diagram ...
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(1993)Recent developments in rare gas geochemistry suggest that the terrestrial atmosphere was generated by degassing part of the Earth's mantle. Neon, however, does not fit into this picture because the20Ne/22Ne ratios in MORB ...
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(1996)The intensity and spectral characteristics of speleothem luminescence are investigated for signs of any potential palaeoenvironmental signals. Luminescence in speleothems has been demonstrated to have an organic acid source, ...
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(2003)The insufficiently studied beryllium silicate sphaerobertrandite has been known since 1957. The present work presents new findings, verifies that the mineral is a valid species with a unique structure. The original name ...
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(2001)Useful U-Pb isotopic data may be obtained from sphene (or titanite, CaTiSiO5) because: (1) it is a widespread accessory mineral, (2) it can incorporate uranium in its structure, and (3) it has a high closure temperature. ...
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(2003)Sphenobaiera ikorfatensis (Seward) Florin from the Lower Cretaceous Huolinhe Formation in the Huolinhe coal-mining area, eastern Inner Mongolia, China, is identified, described and figured. Comparison with the type material ...
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(2001)A simple three-dimensional spherical model of mantle convection, where plates are taken into account in the top boundary condition, allows to investigate the plate tectonics-mantle convection coupling in a self-consistent ...
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(1990)Analysis of the collective data suggest that the spheroidal or spherical form of native selenium is an indicator of the operation of hydrothermal processes in the formation of complex ores in hydrogenous uranium deposits. ...
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(2006)We carried out a systematic study of spinel group minerals in LL3.00-3.9 and LL4-6 chondrites. With increasing petrologic type, the size and abundance of spinel increase. The compositions of spinel group minerals in type ...
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(1997)Spinel peridotite xenoliths from the Atsagin-Dush volcanic centre, SE Mongolia range from fertile lherzolites to clinopyroxene(cpx)-bearing harzburgites. The cpx-poor peridotites typically contain interstitial fine-grained ...
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(1986)For mantle peridotite xenoliths from the Tariat Depression in central Mongolia an origin as partial melt residues has been inferred from the systematic change of bulk chemical compositions with mineral chemistries and modal ...
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(2002)Large discrepancies are reported for the near-solidus, pressure-temperature location of the spinel to garnet lherzolite univariant curve in the system CaO-MgO-Al2O3-SiO2 (CMAS). Experimental data obtained previously from ...
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(2004)Grossular (Grs99Adr01) crystals were synthesized in hydrothermal experiments by the reaction wollastonite + calcite + anorthite = grossular + CO2 (400 MPa; 695-750 °C; XCO2 = 0.1; solid:fluid = 2:1) using natural minerals ...
Now showing items 14065-14084 of 40116