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Browsing ELibrary by Title
Now showing items 13900-13919 of 21934
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(2001)The impact of the spatial variability of porosity on the solution of the flow equation is investigated using standard first-order perturbation analysis. We use existing theories of flow in heterogeneous media and incorporate ...
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(2002)The solubility of H2O in melts along the join CaSi4O4-Ca(Ca0.5Al)4O9 (0, 3, and 6 mol% Al2O3) has been determined at 0.8 to 2.0 GPa and 1200 to 1400°C and compared with the solubility of H2O in melts along the joins ...
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(2001)Molecular water and hydroxyl groups are stable species in hydrous rhyolitic melts. To quantify the species concentrations we have used in situ IR spectroscopic measurements at 773-1073 K and 100-300 MPa in combination with ...
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(1996)The influence of water on the dynamics of the oceanic upper mantle is re-evaluated based on recent experimental constraints on the solubility of water in mantle minerals and earlier experimental studies of olivine rheology. ...
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(2003)Water-level fluctuations in wells open to artesian aquifers record pressure head disturbances caused by dilatation of the aquifer and reflect tide, barometric, and tectonic effects. Monitoring of atmospheric pressure and ...
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(2000)Multi-anvil experiments have been conducted in the MgO-SiO2-H2O system at pressures of 15-24 GPa and temperatures of 1200-1600°C to investigate the partitioning of water between mantle phases. The water contents were ...
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(2003)New constraints on the thermodynamic equation of state of water and the predicted water fugacity dependence of OH-solubility at elevated P-T conditions along with its influence on dislocation dynamics in olivine are reviewed. ...
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(1986)We have measured the water solubility between 1 atmosphere and 5 kilobars for a calcium aluminosilicate melt of molar composition CaO 0.28, Al2O3 0.06, SiO2 0.66 (An9Wo38Qz53). The water contents were measured via ...
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(1987)We have compiled water solubility data for a wide range of natural and synthetic aluminosilicate melts in a search for correlations between melt composition and solubility. The published data reveal some interesting ...
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(1992)The compositional dependence of H2O solubility was investigated at 2 kbar and 800°C in haplogranite melts (system SiO2---1bNaAlSi3O8---1bKAlSi3O8 or Qz---1bAb---1bOr). The sixteen investigated compositions contained 25, ...
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(2003)The solubility of water in melts of the haplobasaltic system (NaAlSi3O8-CaAl2Si2O8-CaMgSi2O6, Ab-An-Di) was investigated at pressures of 50, 200 and 500 MPa and at temperatures between 1200degreesC and 1420degreesC using ...
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(1999)The water solubility in haplogranitic melts (normative composition Ab39Or32Qz29) coexisting with H2O-H2 fluids at 800 and 950 °C and 1, 2 and 3 kbar vapour pressure has been determined using IR spectroscopy. The experiments ...
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(2003)The water storage capacity of the major constituent of the lower mantle, Mg-perovskite, is a matter of debate. Here we report water solubility of Mg-perovskites with different compositions observed in peridotite and MORB ...
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(2003)New 27Al NMR data are presented in order to clarify the discrepancies in the interpretation of the previous 27Al Magic Angle Spinning (MAS) spectra from hydrous aluminosilicate glasses. The 27Al MAS data have been collected ...
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(2001)Transient water table variation in an unconfined horizontal aquifer, lying between two canals located at different elevations above the impermeable barrier and receiving time varying recharge, is predicted by obtaining an ...
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(2002)Soil saturation is known to be of crucial importance to denitrification and other nitrogen cycling processes within the riparian zone. Since denitrification potential generally increases towards the soil surface, water ...
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(1998)Relative changes in the level of Lake Baikal, amounting to hundreds of meters in Quaternary time, are well documented. Data presented here show that tectonic displacements of the lake outlet or former shoreline features ...
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(2001)The rare earth element (REE) composition of an acidic spring discharging at pH 2.7 was studied in relation to the REE composition of selected extracts of the coal-bearing strata hydrologically above the discharge. The low ...
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(2004)Based on specific features of the geological structure and hydrogeological conditions of the Mezen Syneclise, the trend and quantitative estimates of compositional changes of groundwaters in Vendian sandy–clayey rocks in ...
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(2003)In this paper an attempt is made to present a distributed physiographic conceptual model that uses the principles of flow continuity and momentum. For this purpose, the watershed under study is divided into subwatersheds ...
Now showing items 13900-13919 of 21934