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Browsing ELibrary by Title
Now showing items 12013-12032 of 21879
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(2005)Typical liquidus temperatures can be over 1000 °C greater than the glass transition temperatures for high-pressure aluminosilicate melts so the effect of temperature must be determined if glass data is to be used to ...
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(2003)It is recognised that exchange of fluid between fractures and the rock matrix can have a strong impact on a rock's anisotropic elastic properties. A recent theoretical advance considers the effect of the scale length of ...
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(2004)Far-from-equilibrium, steady-state dissolution rates at pH 4 of a suite of natural glasses, ranging from basaltic to rhyolitic in composition, have been determined as a function of aqueous fluoride concentrations up to 1.8 ...
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(2002)Experiments to define the critical curve for a series of silicate melts in equilibrium with a hydrous fluid were carried out in a hydrothermal diamond anvil cell. Silicate compositions studied were albite with several wt% ...
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(1995)Diffusion profiles of tin were produced in hydrous silicate melts adjacent to cassiterite crystals; the method of Harrison and Watson (1983) was adapted to produce Sn diffusion profiles in hydrous silicate melts adjacent ...
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(2001)Several recent studies have applied surface complexation models to quantify metal adsorption by bacterial surfaces. Although these models can account for the effects of many abiotic variables (such as pH and ionic strength), ...
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(2002)Many experimental data demonstrate distinct differences between crystal-liquid partition coefficients Di measured under high temperature, anhydrous conditions and those determined at lower temperatures in the presence of ...
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THE EFFECT OF HALOGENS ON ZR DIFFUSION AND ZIRCON DISSOLUTION IN HYDROUS METALUMINOUS GRANITIC MELTS (2002)Diffusion of Zr and zircon solubility in hydrous, containing approximately 4.5 wt% H2O, metaluminous granitic melts with halogens, either 0.35 wt% Cl (LCl) or 1.2 wt% F (MRF), and in a halogen-free melt (LCO) were measured ...
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(2000)The effect of high-energy electromagnetic pulses emitted by a magnetohydrodynamic (MHD) generator on the seismicity of former Soviet Central Asia and Kazakhstan is examined. The seismicity was found to be appreciably higher ...
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(1995)1-Decene was subjected to hydrosulphurization under phase-transfer conditions at room temperature. Compound-specific isotope analysis revealed that 1-decene becomes enriched in 13C with increasing yields of sulphurization ...
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(2003)The susceptibility of uranophane, a uranyl sheet silicate, ideally Ca(UO2)2(SiO3OH)2(H2 (H2O)5, to ionizing irradiation has been evaluated by systematic irradations with 200 ke V electrons over the temperature range 94 to ...
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(1996)Dissolution experiments using augite (Mg0.87Ca0.85Fe0.19Na0.09Al0.03Si2O6) and diopside (Mg0.91Ca0.93Fe0.07Na0.03Al0.03Si2O6) were conducted in flow-through reactors (5-ml/h flow rate). A pH of 5.8 was maintained by bubbling ...
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(2001)Organic compounds derived from agricultural, industrial and domestic waste frequently contaminate soil and ground water. Any attempt to estimate the effect of these organic acids on water quality must include the various ...
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(1996)Land plants and their associated microbiota directly affect silicate mineral weathering in several ways: by generation of chelating ligands, by modifying pH through production of CO2 or organic acids, and by altering the ...
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(1994)A new simple model for sedimentary basin formation, which combines both stretching and phase transitions occurring together in the lithosphere, is proposed, and two important aspects in sedimentary basin formation are ...
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(2002)The thermodynamic theory describing the partitioning of trace elements between crystals and silicate melt implies that partition coefficients should depend on the major-element composition of the melt from two different ...
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(1999)The rate of Si release from dissolving bytownite feldspar in abiotic batch reactors increased as temperatures increased from 5° to 35°C. Metabolically inert subsurface bacteria (bacteria in solution with no organic substrate) ...
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(2001)The effect of microorganisms on Fe precipitation rates at neutral pH in the field was examined. The studied area was a cave having Fe-stalactites composed mainly of ferrihydrite and associated microorganisms. The microorganisms ...
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(2003)The transfer of hillslope water to and through the riparian zone forms a research area of importance in hydrological investigations. Numerical modelling schemes offer a way to visualise and quantify first-order controls ...
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(2000)The H2O2 organic-matter-removal method (Jackson, 1985) used routinely to remove organic matter from sediments in preparation for δD analyses, was found to alter the δD of the smectite standard, H26, up to -8%% and of Gulf ...
Now showing items 12013-12032 of 21879