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Browsing ELibrary by Title
Now showing items 12646-12665 of 22924
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(2001)The Devonian of Belarus has been reviewed. Strata belong to the lower Lochkovian, upper Emsian, and Eifelian through Famennian. Palaeontological data come from palynomorphs, conodonts, ostracodes, brachiopods and fish ...
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(1996)Stratigraphic evidence indicates that the Russian, or East European, Platform experienced two distinct episodes of long-wavelength down to the east tilting during the Devonian to Permian period. We demonstrate a correlation ...
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(1998)Tectonic subsidence analysis of five major sedimentary basins of the East European platform reveals two episodes of rapid downward motion since the Devonian. The mechanisms of basin evolution are examined to explain the ...
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(1989)This paper considers the practical aspects of differentiating between the solutions of the Diffusion and Telegraph Equations when they are used to model molecular diffusion in sediment porewaters and the diffusive bioturbation ...
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(1996)Use of Fick's First Law to estimate solute fluxes is arguably the most common and important calculation related to the geochemistry and environmental chemistry of fine-grained unlithified sediments. In such porous media, ...
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(2003)The tilt or fold test in paleomagnetism is used to infer whether paleomagnetic remanence was acquired before or after tectonic tilting. While several tilt test formulations have been proposed, none fully satisfies the ...
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(2004)Indications of oil and gas have been found in the mudstone of Taipinglinchang formation in Sunwu-Jiayin basin which is the second important basin for exploration outside Daqing oil field in 2001. Abundant Balmeisporites ...
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(1997)The disproportion of aqueous Au(I) chloride complexes at elevated temperature has been investigated experimentally using the solubility method. At 300°C, the dominant gold species in aqueous HCl solutions is AuCl-2. Upon ...
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(2005)The present study compares the dissolution rates of plagioclase, microcline and biotite/chlorite from a bulk granite to the dissolution rates of the same minerals in mineral-rich fractions that were separated from the ...
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(2000)The kinetics of amorphous silica, SiO2 (am), dissolution was quantified in deionized water and NaCl solutions. By using two sources of pure SiO2 glass (fused purified quartz and pyrolyzed SiCl4), rates were measured at ...
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(1999)The dissolution kinetics of quartz is quantified in dilute mixtures of magnesium, calcium, barium, and sodium chloride salts in near-neutral pH solutions over the temperature range of 175 to 295°C. Measurements using ...
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(2000)Dissolved water has significant effects on the physical and chemical properties of silicate melts. Some of the different approaches towards understanding these effects are reviewed here. Spectroscopic measurements on hydrous ...
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(1998)Apatite dissolution was studied at 25°C in a series of batch experiments carried out within the pH range of 2-7 with or without the presence of aqueous Pb2+ or Cd2+. The synthetic, microcrystalline hydroxylapatite used in ...
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(2006)Uranyl silicates such as uranophane and Na-boltwoodite appear to control the solubility of uranium in certain contaminated sediments at the US Department of Energy Hanford site [Liu, C., Zachara, J.M., Qafoku, O., McKinley, ...
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(2004)Far-from-equilibrium dissolution rates of a suite of volcanic glasses that range from basaltic to rhyolitic in composition were measured in mixed flow reactors at pH 4 and 10.6, and temperatures from 25 to 74°C. Experiments ...
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(2006)We separated and analyzed several organic and inorganic phases of the carbonaceous chondrite matrix to determine whether they contained any inherent asymmetry. Our intent was to determine any possible foci of asymmetry ...
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(2001)A thermodynamic model of Cr distribution between chromian spinel and basaltic melt has been developed using the Sack & Ghiorso (1991) thermodynamic model for chromian spinel and an equation analogous to that of Sack er nl. ...
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(2001)Experiments defining the distribution of H2O [D-w = wt % H2O(melt)/wt % H2O(crd)]) between granitic melt and coexisting cordierite over a range of melt H2O contents from saturated (i.e. coexisting cordierite + melt + vapour) ...
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(2001)Experiments to determine the distribution of H2O and CO2 between synthetic peraluminous granitic melt and natural Fe-Mg cordierite have been conducted at 5 kbar and 900 C under fluid-saturated conditions. Up to seven ...
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(1998)Analytical data by ICP-MS measurements after pyrohydrolysis on a reasonably large series of samples representing about 300 rocks of major units and subunits of the earth's crust, and a few organic materials, are provided ...
Now showing items 12646-12665 of 22924