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Browsing ELibrary by Title
Now showing items 3135-3154 of 21879
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(1990)This article presents the results of experimental studies of the processes by which gas is displaced by water from models of fractured-porous media that meet the appropriate criteria of simulation. The difficulties of ...
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(2001)The phase transitions in deuterated lawsonite were investigated with high-resolution, time-of-flight neutron diffraction between 2 and 500 K. From the analysis of spontaneous strain data, the thermodynamics of the phase ...
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(2001)This paper describes quantitative methods for evaluating the distribution of focal mechanism orientations of groups of earthquakes, and shows how to display this distribution on a triangle diagram. We present a χ2-based ...
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(2004)The detailed analysis of EPR and luminescence spectra of natural 1aB diamonds with plastic deformation traces is given and the effect of P,T treatment on nitrogen defect transformation in this crystals is investigated. As ...
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(2002)This paper is devoted to large commercial disseminated gold-sulfide deposits in the Russian Northeast. Their location is controlled by intrusive dome structures and tectonic blocks in zones of tectonomagmatic activation. ...
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(2004)Zones of anomalous pressure, higher and lower than hydrostatic pressure, have been observed in many sedimentary basins around the world. These normally consist of groups of pressure compartments: volumes of higher-permeability ...
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(2002)Zoning patterns and zoning truncations in metamorphic minerals in a granodioritic orthogneiss indicate that strain and S–C fabrics in these rocks were produced by dissolution, precipitation, and replacement processes, even ...
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(1986)Several samples of quartz were etched hydrothermally at 300°C in etchams of controlled dissolved silica concentration in order to measure the critical concentration, Ccrit, above which dislocation etch pits would not ...
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(1999)Mineral magnetic properties of soils and sediments are increasingly used as proxy parameters for environmental and palaeoclimate analysis. To investigate which magnetic minerals contribute to the environmental signal in ...
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(2000)The effects of solid solution and solid state diffusion on crystal dissolution in a multicomponent liquid was examined by studying exact and approximate solutions to equations governing isothermal-isobaric diffusive ...
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(1998)The dissolution kinetics of epidote [Ca1.83Al2.00(Al0.11Fe0.743+Fe0.102+Mn0.001Mg0 .19Ti0.054+)Si3.00O12OH] were studied over the pH range 1-6.5 at 25°C using flow-through reactors. Ca and Si were found to be the most ...
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(1996)Although many geochemical processes, including mineral dissolution, are controlled by kinetic mechanisms, quantitative descriptions of the reaction kinetics are mostly lacking, principally due to an incomplete understanding ...
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(2001)Basaltic glasses are considered as natural analogs for industrial nuclear aluminoborosilicate glasses. Alteration experiments were conducted in closed and open systems at 90°C with a synthetic basalt glass doped with 1% ...
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(1997)Dissolution and precipitation of calcium carbonate minerals in aqueous solutions with turbulent flow are controlled by a diffusion boundary layer (DBL) adjacent to the surface of the mineral, across which mass transfer is ...
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(2006)The steady state dissolution rate of San Carlos olivine [Mg1.82Fe0.18 SiO4] in dilute aqueous solutions was measured at 90, 120, and 150 °C and pH ranging from 2 to 12.5. Dissolution experiments were performed in a stirred ...
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(2001)The dissolution kinetics of features on the magnesite (104) surface were studied in aqueous solutions from pH 4.2 to 2 and at temperatures between 60 and 90°C by hydrothermal atomic force microscopy (HAFM). At pH = 4.2, ...
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(2002)Magnesite (104) dissolution kinetics were studied in acidic aqueous solutions (2.0 < pH < 4.2) at temperatures between 60 and 90°C by atomic force microscopy (AFM). Comparison of dissolution fluxes obtained by AFM and ...
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(2004)Dissolution of water in magmas significantly affects phase relations and physical properties. To shed new light on the this issue, we have applied 1H and 29Si nuclear magnetic resonance (NMR) spectroscopic techniques to ...
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(2000)The preparation of samples for strontium isotope stratigraphy (SIS) by whole rock dissolution results in contributions of Sr from contaminant phases as well as from the target carbonate phase. Here we highlight and quantify ...
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(2000)Goethite particles in soil environments often contain Al3+ substituted for Fe3+ in octahedrally coordinated sites. Al substitution has been shown to alter mineral stability and abiotic dissolution rates. This study focused ...
Now showing items 3135-3154 of 21879