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Browsing ELibrary by Title
Now showing items 12093-12112 of 21934
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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 ...
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(2000)The influence of cation and anion identity and concentration, on the far from equilibrium dissolution rate of gibbsite, was studied at 298°K. Input solutions, with initial pH = 3.5 and variable salt type and concentration, ...
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(1996)A mathematical framework for quantitative evaluation of alpha-stopping effects on (U-Th)/He ages has been developed. Alpha stopping ranges in the 238U, 235U, and 232Th chains vary between ~ 10 and ~ 30 μm, depending on ...
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(1999)Short lived isotope data are increasingly used to investigate magma chamber residence times. Arc lavas have excellent potential as tracers of magma evolution because their magmas are often out of U-series isotope equilibrium, ...
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(2003)Apatite (Ca 10 [PO 4 ] 6 [OH] 2) precipitation from aqueous solutions involves multiple steps, such as nucleation of a precursor calcium phosphate phase, cluster aggregation, crystal growth, and transformation to apatite, ...
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(2006)Most studies agree that the dissolution rate of aluminosilicates in the presence of oxalic and other simple carboxylic acids is faster than the rate with non-organic acid under the same pH. However, the mechanisms by which ...
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(2004)Crustal-scale seismic surveys mostly collect data along single profiles, and the data processing has an underlying assumption that the data have imaged two-dimension (2D) structure striking at right angles to the seismic ...
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(2003)Flow injection analysis was used to study the effect of a fulvic acid on the kinetics of iron(II) oxidation and iron colloid formation under conditions approximating fresh natural waters. While iron(II) oxidation in ...
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(2003)A combination of flow-injection analysis and kinetic analysis was used to examine the speciation of iron(II) and iron(III) in fulvic acid solutions as a function of pH, ionic strength, and time. This methodology was used ...
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(2000)We reevaluate the effects of sampling artifacts on estimates of the flux of cosmic dust to Earth by modeling the population of extraterrestrial particles as a function of surface-area and time-interval sampled. Results ...
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(2006)The effects of small amounts of H2O (<4?wt % in the melt) on the multiply saturated partial melting of spinel lherzolite in the system CaO–MgO–Al2O3–SiO2 ± Na2O ± CO2 have been determined at 1·1?GPa in the piston-cylinder ...
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(2005)Atomic force microscopy (AFM) and Derjaguin-Landau-Verwey-Overbeek (DLVO) theory in combination with the interaction force boundary layer (IFBL) model have been used to empirically and theoretically calculate sticking ...
Now showing items 12093-12112 of 21934