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Browsing ELibrary by Title
Now showing items 11910-11929 of 21879
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(2001)This study uses information on composition, thermal state and petrological thickness to calculate the densities of different types of subcontinental lithospheric mantle (SCLM). Data from mantle-derived peridotite xenoliths ...
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THE DEPENDENCE OF LABRADORITE DISSOLUTION AND SR ISOTOPE RELEASE RATES ON SOLUTION SATURATION STATE (2000)Labradorite dissolution kinetics and Sr release rates were measured as a function of the saturation state of weathering solutions in column reactors. During the first 750 hours, rapid, nonstoichiometric dissolution was ...
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(1999)The dependence of iron and europium partitioning between plagioclase and melt on oxygen fugacity was studied in the system SiO2(Qz)-NaAlSi3O8(Ab)-CaAl2Si2O8(An)-H2O. Experiments were performed at 500 MPa and 850 °C/750 °C ...
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(2000)The responses of α-Al2O3 and In2O3 dissolution rates to pH-jumps in flow-through reactors are compared to previous results for α-Fe2O3 in order to test the following hypothesis: because the same fundamental processes of ...
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(2000)Periods of transient nonsteady state dissolution can contain much information about dissolution mechanisms. Here, pH-jump-induced dissolution transients are used to explore the kinetics of production, at pH 3 and pH 6, of ...
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(1996)The depletion of the siderophile element tungsten (W) in the bulk silicate Earth (BSE), due to core formation, provides clues to the formation and early evolution of the Earth. This study significantly improves our knowledge ...
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(1991)It is often proposed that the onset of fluid immiscibility may be a direct cause of ore deposition, with evidence cited from fluid inclusions associated with the ore minerals. A reaction-path model is used here to calculate ...
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(1998)We have determined the pressure and temperature of the spinel-garnet transition close to the solidus of fertile and depleted peridotite from a combination of synthesis, sandwich and garnet-seeded experiments. Garnet is ...
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(2003)An acid- and transfer-prepared, juvenile Rhamphorhynchus muensteri , despite some fragmentation, is in an excellent state of three-dimensional preservation, exposing exquisite anatomical details hitherto unknown in other ...
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(2001)By correlating the pronounced interstadial-type diatom peak with MIS 3, the high-resolution and well-dated record BDP-93-2 from the Selenga Delta area of Lake Baikal complements the classical long paleoclimatic records ...
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(1999)Electrical impedance measurement is shown to detect water-wetting in salt at elevated temperature and pressure. The critical wetting temperature (and pressure) is detected by a characteristic fall of in-phase resistivity. ...
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(1996)The paper deals with the use of the results of geophysical observations in areas of water to solve geological engineering, hydrogeological and geoecological problems. The measurement of natural electrical fields can be ...
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(2003)Porphyry ore deposits are generally located above plutonic apexes, described as finger-like extrusions from a large underlying silicic magma chamber. Fractures and faults that concentrate around these shallow structures ...
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(2001)We used a numerical finite element simulation to model the formation of flanking folds around rotating planar structures (e.g. veins, faults or dykes) in a non-linear viscous medium during ideal simple shear. If the planar ...
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(1999)Dissolution rates of minerals depend on several factors. Among them, the factor measuring the deviation of the solution from equilibrium has not been sufficiently investigated. The dissolution rate of kaolinite as it would ...
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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, ...
Now showing items 11910-11929 of 21879