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Browsing ELibrary by Title
Now showing items 4046-4065 of 21768
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(2001)Molecular transport (diffusion) of methane in water-saturated sedimentary rocks results in carbon isotope fractionation. In order to quantify the diffusive isotope fractionation effect and its dependence on total organic ...
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(1995)A technique based on the common ion effect was used to obtain information on the stoichiometry of the Pt(IV) and Pd(II) chloride complexes at elevated temperature. The solubility of AgCl(s) was measured in solutions of ...
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(1996)The solubility of metallic Pt in HCl solutions was determined at 200 to 300°C at oxidation states buffered near the aqueous Pt(II)/Pt(IV) boundary. Equilibrium constants were obtained for the following disproportionation ...
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(2002)The formation of an excess of dissolved gas (''excess air'') in quasi-saturated media was studied by analyzing and interpreting dissolved noble gas concentrations in laboratory column experiments. Using quartz sand filled ...
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(1996)The <20 µm size fraction of a bentonite from the serrata de nijar deposit (almeria, southeastern spain) was hydrothermally treated to study kinetics smectite-to-illite transformation, in order estimate performance life ...
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(2005)The source terms arising from radioactive/toxic metal waste repositories will contain a multitude of dissolved metal species, as do natural systems. The influence of sorption competition on the uptake of safety-relevant ...
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(1993)In-vacuo heating of 0.5 –0.7 mm olivine and clinopyroxene grains separated from Hawaiian ultramafic xenoliths leads to complete He loss within hours to days for temperatures of 700–1400°C. Diffusivities calculated from the ...
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(1997)The fO2 of the equilibrium between graphite and C-O fluid has been determined at 35–77 kbar and 925-1650°C using metal-metal oxide reactions as redox sensors and by employing an assemblage of Co-Pd alloy and CoO as a sliding ...
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EXPERIMENTAL MEASUREMENTS OF THE PROPERTIES OF H2O-CO2 MIXTURES AT HIGH PRESSURES AND TEMPERATURES (1997)We have experimentally determined volumes of H2O-CO2 mixtures between 9.5 and 19.4 kbar at 1100-1400°C. A synthetic fluid inclusion technique (Sterner and Bodnar, 1991) was used to capture H2O-CO2 fluids of known composition ...
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(2000)This study tests the reversibility of metal-bacteria interactions by comparing estimated extents of desorption based on surface complexation modeling, to those we observed in the experimental adsorption/desorption systems. ...
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(2002)Melting of a spinel lherzolite with a spinel clinopyroxenite layer was investigated experimentally from 3.5 to 20 kbar and from 1200 to 1450 °C. The melt fraction in the spinel pyroxenite layer increases rapidly, and ...
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(2003)Understanding the processes that led to the mineralization of Precambrian metazoan eggs and embryos is essential to informed interpretations of such fossils and their significance in early metazoan evolution. Here we show ...
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(2000)In connection with the discovery of a new type of Pt deposit in low-rank brown coals and black shales, the interaction of Pt-bearing aqueous solutions with fractionated organic matter (asphaltenes and asphaltenic acids) ...
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(2004)The experimentally determined Sr partition coefficients between CaCO 3 and solutions that imitate the water in river mouths are consistent with the available literature data on the Sr partition coefficients for aragonite. ...
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(2004)The effect of crystals and pre-existing gas phases on the dynamic degassing and fragmentation of magmas in a volcanic conduit have been simulated by analogue experiments. A series of decompression experiments of viscous ...
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(1995)We have performed melting experiments between 1170-1325°C and at an oxygen fugacity of IW-1 on the ordinary chondrites Lost City (H) and St. Severin (LL) in order to investigate the origin of diogenites and their possible ...
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(1987)Analysis of the very limited available information on natural parageneses shows that magnetite associated with sulfide ore is low in titanium, as well as in vanadium, relative to the accessory ores. The nickel content of ...
Now showing items 4046-4065 of 21768