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Browsing ELibrary by Title
Now showing items 2813-2832 of 21768
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(2004)The thermal dehydration process of the natural Li zeolite bikitaite has been studied in situ by synchrotron radiation powder diffraction. The temperature-resolved experiments were performed using a translating imaging plate ...
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(1995)We report the results of partial melting experiments between 8 and 32 kbar, on four natural amphibolites representative of metamorphosed Archean tholeiite (greenstone), high-alumina basalt, low-potassium tholeiite and ...
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(2005)The dehydration behavior of a natural stilbite sample from Poona (India) was investigated by in situ FTIR. The thermal induced variations of the water molecule bending (ν2) mode around 1653 cm−1, the stretching (ν3 and ν1) ...
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(2002)Cordierite precursors were prepared by a sol-gel process using tetraethoxysilane, aluminum sec.-butoxide, and Mg metal flakes as starting materials. The precursors were treated by 15-h heating steps in intervals of 100 °C ...
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(1995)We performed vapor-absent melting and crystallization experiments on two bulk compositions that model metamorphic rocks containing a single hydrous phase: a biotite gneiss [37% bio (mg-number 55), 34% qtz, 27% plg (An38), ...
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DEHYDROXYLATION AND CO2 INCORPORATION IN ANNEALED MICA (SERICITE): AN INFRARED SPECTROSCOPIC STUDY (2005)Dehydroxylation and incorporation of CO2 in mica (sericite-2M1) during high-temperature annealing has been investigated in detail using infrared (IR) spectroscopy. The dehydroxylation is characterized by a dramatic change ...
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(2002)The thermally-induced dehydroxylation and transformations of the 2:1 phyllosilicate pyrophyllite have been studied using infrared spectroscopy in the frequency range 350 11000 cm 1 and the temperature range 200 1500°C. ...
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(2000)Celadonite and glauconite samples heated at different temperatures were studied by X-ray and electron diffraction. For dioctahedral micas the in-plane component of the translation between layers (ccosβ/a), which is strongly ...
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(2000)The quantitative interpretation of the reflection intensities of the SAED patterns of glauconites reveals the mechanism of migration of the octahedral sheet cations during heating up to 750°C. It confirms that Mg2+ has a ...
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(2002)The thermal conductivity of mantle materials decreases with higher temperatures and increases with greater pressure due to phonon mechanism, but increases with temperature for radiative transfer. This trade-off attribute ...
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(2000)Recent numerical models and analog shock tube experiments show that disequilibrium degassing during magma ascent may lead to violent vesiculation very near the surface. In this study a series of decompression experiments ...
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(2003)The marine fill of ancient foreland basins is primarily recorded by depositional systems consisting of facies and facies associations deposited by a variety of sediment gravity flows in shallow-marine, slope and basinal ...
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(2004)The growth and microstructure of deltidial covering plates of Lower and Middle Ordovician Clitambonitidines from Estonia and Leningrad Region are reviewed. In the genera Anchigonites, Antigonambonites, Vellamo, and Estlandia, ...
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(2001)A method was developed to demineralize sediment trap material and marine sediments containing labile organic matter (OM), in preparation for cross polarization and magic angle spinning (CP/MAS) solid-state 13C NMR analysis. ...
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(2001)Field and laboratory studies reveal that the mineral ferrihydrite, formed as a result of abiotic oxidation of aqueous ferrous to ferric Fe, contains Fe that is isotopically heavy relative to coexisting aqueous Fe. Because ...
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(2003)The article presents fossilized plant remains from the Uzon caldera in Kamchatka for the first time. A problematic plant remain from diatomite, undetermined plant bulbs and several pieces of silicified herbs and wood as ...
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(2003)Densities of ultramafic melts were determined up to 22 GPa by relative buoyancy experiments. Olivine and diamond were used as buoyancy markers. We confirmed that the density crossover of PHN 1611 melt and its equilibrium ...
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(2003)The origin and evolution of cratonic roots has been debated for many years. Precambrian cratons are underlain by cold lithospheric roots that are chemically depleted. Thermal and petrologic data indicate that Archean roots ...
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(2002)Lake Teletskoye occupies a narrow graben located in the northwestern sector of the Altai fold belt in South Siberia. The lake basin is thought to have formed during the Pleistocene as a distant result of the Cenozoic ...
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(2005)Locally diffusive, radiative heat transport inside the earth is represented by an effective thermal conductivity (krad,dif), calculated from spectra. Previous geophysical models assumed that emissivity (ξ) equals unity, ...
Now showing items 2813-2832 of 21768