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Browsing ELibrary by Title
Now showing items 4086-4105 of 21934
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(1996)In this study sulphur isotope fractionation between undissociated dissolved H2S and H2S gas has been investigated experimentally. Such measurements were carried out at temperatures of 11o, 20o and 30oC. The experiment was ...
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(2004)The temporal permeability, porosity, and reactive surface area evolution during dissolution of nonfractured/clay-free Fontainebleau sandstone cores was measured using a flow through percolation reactor. Four core dissolution ...
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(2002)The compositions of various transition-zone and lower-mantle phases and coexisting carbonatic melts were determined by exploratory melting experiments in chemically complex CO2-bearing systems at 20–24.5 GPa and 1600–2000 ...
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(1999)Recent geophysical studies demonstrated the occurrence of zones with unusually low seismic velocities and high electric conductivity in the middle part of the Earth's crust. The nature of such zones is not fully understood. ...
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(2001)To characterise the kinetics of Ostwald ripening of quartz, we conducted four series of experiments in systems consisting of quartz, with an initial grain size of ~1.3 to 6 µm, in equilibrium with hydrous silicic liquids. ...
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(2002)Multianvil experiments were carried out at 10–15 GPa and 1600–1700 °C to match the compositions of majoritic garnet inclusions from diamonds, and to determine the compositions of other phases potentially coexisting with ...
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(2001)The reaction An-rich plagioclase + quartz + fluid = analcime (NaAlSi4O12 · 2H2O) - wairakite (CaAl2Si4O12 2H2O ss (solid solution series) has been studied experimentally in the temperature range 350-200°C. Distilled water ...
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(2002)The system Ca2Al3Si3O11(O/OH)-Ca2Al2FeSi3O11(O/OH), with emphasis on the Al-rich portion, was investigated by synthesis experiments at 0.5 and 2.0 GPa, 500-800 °C, using the technique of producing overgrowths on natural ...
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(2001)We carried out high-pressure and high-temperature experiments on the composition CaMg(CO3)2 to determine the equilibrium boundary of dolomite=aragonite+magnesite up to 8.5 GPa and 1200°C, using a 6–8 type multianvil ...
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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 ...
Now showing items 4086-4105 of 21934