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Browsing ELibrary by Title
Now showing items 12082-12101 of 21934
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(1998)The distribution of the elements Ni, Co, Mn, Cr, and V between liquid Fe-Ni-metal and magnesiowustite solid solutions is investigated at 9 GPa in the temperature range 1800-2400°C. The variation of starting material enables ...
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(2001)The Fe-FeS melt is thought to be the major candidate of the outer core material. Its viscosity is one of the most important physical properties to study the dynamics of the convection in the outer core. We performed the ...
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(1998)The goal of this study was to ascertain the nature of the Ar release mechanism(s) for a single, well characterized muscovite heated incrementally in vacuo: (1) at temperatures and time intervals typical of 40Ar/39Ar step ...
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(2003)Oxygen and C isotope compositions Of C02 gas released by thermal decomposition of siderite, calcite, and dolomite were measured using a new 'real-time' continuous-flow technique to determine whether fractionation associated ...
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(2005)An Acidithiobacillus thiooxidans spp., isolated from the Driefontein Consolidated Gold Mine, Witwatersrand Basin, Republic of South Africa was able to precipitate gold from Au(S2O3)23− in the presence of up to 0.26 mM gold. ...
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(2003)The correlation between decreasing reaction rates of silicate minerals and increasing duration of chemical weathering was investigated for both experimental and field conditions. Column studies, using freshly prepared ...
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(2004)We have determined Pd, Ni, and Fe solubilities in silicate melts of anorthite-diopside eutectic composition with variable TiO2 concentrations, from TiO2-free melts to melts with up to 26 wt% TiO2. The experiments were ...
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(2001)High pressure, high temperature phase equilibria experiments were performed to investigate the effect of TiO2 on mineral-liquid equilibria for near natural olivine + orthopyroxene-saturated mafic liquids. At 1.2 GPa and ...
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(2003)The low-frequency mechanical properties of polycrystalline Ca1-xSrxTiO3 (0.5 ≤ x ≥ 0.9) have been investigated as a function of temperature and bulk composition using the technique of dynamical mechanical analysis in ...
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(1998)Experimental determination of the rate of isotopic exchange between water and water vapor indicates a dependence on temperature. In these experiments, two beakers that initially contained waters with differing isotopic ...
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(2001)New experiments on the effect of dissolved water on the ferric-ferrous ratio of silicic melts have been performed at 200 MPa, between 800°C and 1000°C and for fO2 between NNO-1.35 and NNO+6.6. Water-saturated conditions ...
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(1999)An analysis of the influence of water (<1500 ppmw) on viscosity in lithium disilicate melt has been conducted in light of the Adam-Gibbs (AG) structural relaxation model. Using information from prior relaxation studies and ...
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(2003)The effect of γ-irradiation on the structure, phase composition and kinetics of isothermal decomposition of natural textural brucite Mg(OH)2 has been investigated by Mn2+ electron paramagnetic resonance (EPR), proton ...
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(2003)Seismic velocities in a gas-charged magma vary with depth and time. Relationships between pressure, density, exsolved gas content, and seismic velocity are derived and used in conjunction with expressions describing diffusive ...
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(2003)Plants and animals exploit the soil for food and shelter and, in the process, affect it in many different ways. For example, uprooted trees may break up bedrock, transport soil downslope, increase the heterogeneity of soil ...
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(2004)Using both numerical experiments and approximate linear theory, we examine the stability of a 2-D, three-layered viscous system that represents crust over mantle lithosphere, overlying asthenosphere. If horizontal shortening ...
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(1996)The ionic porosity model of Fortier and Giletti (1989), which parameterizes variations in diffusion coefficients among different mineral structures, has been extended to estimate the variation in diffusivities in a single ...
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(2005)The propagation of database parameter uncertainty has been assessed for aqueous and mineral equilibrium calculations of uranium by Monte Carlo and quasi-Monte Carlo simulations in simple inorganic solution compositions. ...
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(2000)We explore the implications of experimental constraints on mantle rheology and the thermodynamics of melting for mantle flow and melt generation beneath a mid-ocean ridge. Numerical models are used to investigate the effects ...
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(2004)Carbon dioxide dissolves in coals and swells them slightly. The dissolved CO2 seems to act as a plasticizer, enabling physical structure rearrangements and lowering the coal's softening temperature. Plasticized coals are ...
Now showing items 12082-12101 of 21934