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Browsing ELibrary by Title
Now showing items 5399-5418 of 21821
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(1997)One-atmosphere density measurements at very high temperatures have been performed on four mantle melts in the FeO-Fe2O3-CaO-MgO-Al2O3-SiO2 system (FeO-rich peridotite, PHN 1611, komatiite, and fayalite), using the Ir-based ...
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(2002)A series of heating stage experiments, at ambient atmosphere and high temperature, were conducted in order to detail the change in the homogenization temperature and the behavior of H2O of melt inclusions in olivine ...
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(2001)The heat capacity of end-member titanite and (CaTiSiO5) glass has been measured in the range 328–938 K using differential scanning calorimetry. The data show a weak λ-shaped anomaly at 483 ± 5 K, presumably associated with ...
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(2003)The prediction of viscosity in silicate melts, over the range of conditions found in nature, remains one of the most challenging and elusive goals in Earth Sciences. We present a strategy for fitting non-Arrhenian models ...
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(1999)Raman spectra of fluids of the CO2-CH4-H2O systems contained in synthetic fluid inclusions have been obtained above the homogenization temperature to 500°C. Spectra of the CO2 and CH4 gases do not vary along the portion ...
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(2001)Torsional forced-oscillation and microcreep methods have been employed in a study of the viscoelastic behaviour of fine-grained polycrystalline olivine at high temperatures (to 1300 °C), seismic frequencies and low strain ...
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(2003)Structural investigations at high temperature were carried out on natural columbite samples across the join Fe(Nb0.95Ta0.05)2O6-Mn(Nb0.95Ta0.05)2O6. The samples were preliminarily annealed to attain the complete cation-ordered ...
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(2002)The optical spectra of dravite (tourmaline) with an unusually high ratio of Fe3+ to Fe2+ and a synthetic elbaite with high Fe3+ content were studied at high temperature (297 to 600 K) and high pressure (to 10.51 GPa) ...
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(1989)The boundary dated at 200 to 1800 m.y. marks an event that is of fundamental importance in the Earth's history and separates the early stages of planetary evolution from the Neogaean with its present type of geodynamics. ...
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HIGH-YIELD LITHIUM SEPARATION AND THE PRECISE ISOTOPIC ANALYSIS FOR NATURAL ROCK AND AQUEOUS SAMPLES (1998)A high-yield lithium separation technique for rock and aqueous samples has been established together with precise Li isotope analysis by thermal ionization mass spectrometry. Four separate stages of ion-exchange chromatography ...
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(2000)Tri- and tetraunsaturated highly branched isoprenoid (HBI) alkenes are widespread sedimentary geochemicals but few have been isolated from sediments in sufficient quantities for rigorous identification. However, two C25 ...
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(2003)The abundances of the highly siderophile elements (HSE), Re, Os, Ir, Ru, Pt and Pd, were determined by isotope dilution mass spectrometry for bulk samples of 13 carbonaceous chondrites, 13 ordinary chondrites and 9 enstatite ...
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(2003)Hillite ('(sic)' in Russian), ideally Ca-2(Zn,Mg)[PO4](2).2H(2)O, is a new zinc-dominant analogue of collinsite, isostructural with fairfieldite. It occurs in unmetamorphosed sediments. of the Lower Cambrian Parachilna ...
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(2002)Variability in surface condition occurs at different spatial and temporal scales. Locally, surface conditions interact with soil components and determine the dynamic of surface sealing, biomass, and roughness. At the ...
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(1987)The paper discusses a model of a granular porous medium whose microstructure is formed by rigid grains separated by compliant partings. The grains form conglomerates of various scales, with a definite size hierarchy. ...
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(1999)In the framework of the Russian-French project, a series of geodesic stations for studying present-day crust deformations by the GPS method was organized on the Baikal geodynamic test ground. Processing of data of 3-year-long ...
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(2003)An exact knowledge of rock formation ages is perhaps the single most important tool needed for assembling the geologic record into a coherent history. Moreover, the age of Earth and the time scale of pre-human events are ...
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(2001)Ancient Babylonian clay tablets buried for centuries beneath the sands of the desert are part of an extensive historical archive which contains vital information about the rotation of the Earth. Many eclipse records are ...
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(2003)The morphology, structural setting, and evolution of the Baikal rift system has been controlled by its position at the junction of the Siberian craton and the Central Asian mobile belt, two major tectonic units with ...
Now showing items 5399-5418 of 21821