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Browsing ELibrary by Title
Now showing items 12018-12037 of 21934
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(1998)To examine the effect of clay minerals on diasterane/sterane ratios, the mineral compositions of three sample sets of sedimentary rocks displaying a wide range of diasterane/sterane ratios were analysed quantitatively. ...
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(1997)The stable oxygen isotope composition of the aragonitic skeleton of hermatypic corals is a potential archive of paleotemperature and rainfall data. Biological processes also influence coral δ18O although it has been difficult ...
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(2006)The effect of compression on noble gas solubility in silicate melts is still badly understood due to a lack of theoretical guidance. In the experimental literature, noble gases dissolving in liquid silicates are found to ...
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(1998)This study investigates the influence of thermal convection planform geometry on the pattern of surface deformation in a dynamic model of plate-mantle coupling. The lithosphere is viewed as a distinct rheological layer and ...
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THE EFFECT OF CR ON THE SOLUBILITY OF AL IN ORTHOPYROXENE: EXPERIMENTS AND THERMODYNAMIC MODELLING (2000)The partitioning of chromium and aluminium between coexisting orthopyroxene and spinel in equilibrium with forsterite in the system MgO-Al2O3-SiO2-Cr2O3 (MAS-Cr) has been experimentally determined as a function of temperature, ...
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(2004)Chromium as Cr3+ substitutes for octahedrally coordinated Al in upper-mantle minerals, thereby reducing the activity of Al2O3 in the system and hence the concentration of Al2O3 in partial melts. The effect of Cr2O3 on melt ...
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(2004)Chromium as Cr3+ substitutes for octahedrally coordinated Al in upper-mantle minerals, thereby reducing the activity of Al2O3 in the system and hence the concentration of Al2O3 in partial melts. The effect of Cr2O3 on melt ...
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(2004)Chromium as Cr3+ substitutes for octahedrally coordinated Al in upper-mantle minerals, thereby reducing the activity of Al2O3 in the system and hence the concentration of Al2O3 in partial melts. The effect of Cr2O3 on melt ...
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(2002)The effect of crystal anisotropy on wetting angles of equilibrium silicate melts on crystal faces of spinel, diopside, enstatite and olivine has been determined experimentally by the sessile melt drop technique. The ...
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(2006)Comparison of measured far-from-equilibrium dissolution rates of natural glasses and silicate minerals at 25 °C and pH 4 reveals the systematic effects of crystallinity and elemental composition on these rates. Rates for ...
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(2003)In this study, we performed silica precipitation experiments with the cyanobacteria Calothrix sp. to investigate the mechanisms of silica biomineralization. Batch silica precipitation experiments were conducted at neutral ...
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(2003)We conducted a series of sand-box models shortened asymmetrically above a frictional-plastic decollement to study the influence of amount and sense of the decollement dip on the geometry and kinematics of accretionary ...
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(2004)A numerical model was applied to investigate and quantify the biogeochemical processes fueled by the expulsion of barium and methane-rich fluids in the sediments of a giant cold-seep area in the Derugin Basin (Sea of ...
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(2003)We experimentally tested a series of synthetic calcite marbles with varying amounts of dissolved magnesium in a standard triaxial deformation machine at 300 MPa confining pressure, temperatures between 700 and 850°C, ...
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(2000)The hypothesis that the deep inner core is anisotropic is based on PKP travel time observations at large distances and relies on a small number of very anomalous measurements for paths quasi-parallel to the Earth’s rotation ...
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(2004)Methane hydrate, equilibrated at P, T conditions within the hydrate stability field, was rapidly depressurized to 1.0 or 2.0 MPa and maintained at isobaric conditions outside its stability field, while the extent and rate ...
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(2000)Mineral dissolution is an important factor in many magmatic processes such as melting, assimilation and magma mixing. Since it is not possible to determine dissolution rates or mechanisms from natural samples, experimental ...
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(2002)Si adsorption onto Bacillus subtilis and Fe and Al oxide coated cells of B. subtilis was measured both as a function of pH and of bacterial concentration in suspension in order to gain insight into the mechanism of association ...
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(2001)Acidithiobacillus ferrooxidans are commonly present in acid mine drainage (AMD). A. ferrooxidans derive metabolic energy from oxidation of Fe2+ present in natural acid solutions and also may be able to utilize Fe2+ released ...
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(2002)First-principles calculations have been used to determine the equation of state of Fe3C in both its low-pressure magnetically ordered and high-pressure non-magnetically ordered states; at 0 K the ferromagnetic transition ...
Now showing items 12018-12037 of 21934