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Browsing by Title
Now showing items 9039-9058 of 41800
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(2006)Rapid Pb-Pb dating of natural rutile crystals by laser ablation multiple-collector inductively coupled plasma mass spectrometry (LA-MC-ICPMS) is investigated as a tool for constraining geological temperature-time histories. ...
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(2004)Studies of marble panels from the exterior of two buildings document the processes leading to bowing of the material. Bowing of panels is most extensive in those areas that are exposed to direct or reflected thermal energy. ...
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(2001)Advances in technology have resulted in a new instrument that is designed for in-situ determination of particle size spectra. Such an instrument that can measure undisturbed particle size distributions is much needed for ...
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(1998)Hydrous pyrolysis experiments were conducted at 125 to 375°C and 350 bars to constrain factors that regulate the generation and relative abundance of hydrocarbon and nonhydrocarbon gases during thermal maturation of Monterey, ...
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(2006)In order to better understand condensation processes that took place in the solar nebula and to evaluate the effect of kinetics on the condensed matter, we have built an experimental apparatus for studying condensation of ...
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(2002)Undetected depositional and/or compaction-caused inclination errors may result in an overestimation of tectonically caused latitudinal offset. Hodych & Buchan used a single-component isothermal remanent magnetization (IRM) ...
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(2003)Rapid temperature change causes fractionation of isotopic gaseous species in air in firn (snow) by thermal diffusion, producing a signal that is preserved in trapped air bubbles as the snow forms ice. Using a model of heat ...
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(1996)Bacteria may potentially enhance or inhibit silicate mineral dissolution in nature by a variety of mechanisms. In the laboratory, some microbial metabolites enhanced dissolution rates by a factor of ten above the expected ...
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(2002)This paper presents the results of laboratory experiments and numerical simulations carried out in order to understand the mechanism of sediment-wave formation by turbidity currents. Experimental turbidity currents were ...
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(1995)Mantle seismic tomography images indicate a variety of shapes for slabs of oceanic lithosphere subducted into the transition zone. In the vicinity of the 660 km discontinuity both horizontally deflected slabs and nearly ...
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(2004)Samples of silica-rich and MgO-rich condensed, amorphous magnesiosilica smokes were hydrated to monitor systematic mineralogical and chemical changes as a function of time and temperature controlled by their unique metastable ...
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(2002)Laboratory studies of shock metamorphism have long provided a basis for recognition of the diagnostic features of ancient terrestrial impact craters. However, there are significant differences between the range of parameters ...
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(2001)Laboratory imbibition and vapor-diffusion experiments were developed and conducted to measure accurately water imbibition and vapor condensation into welded tuff of low permeability. Automatically recorded balance readings ...
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(2002)Equilibrium dialysis was used to measure Co- and Cu-binding by an isolated peat humic acid (PHA) in controlled laboratory experiments under simulated estuarine conditions: ionic strengths of 0.005 to 0.7 M in NaCl and mixed ...
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LABORATORY MEASUREMENTS OF ELECTRICAL CONDUCTIVITY OF HYDROUS AND DRY SILICIC MELTS UNDER PRESSURE (2004)An interpretation of the electrical signature of molten rocks within the Earth's interior in terms of nature and temperature conditions of magma requires additional laboratory data on the electrical conductivity of silicate ...
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(1988)We have done a laboratory study of the evolution of a cylindrical volume of mixed liquid of nonzero buoyancy in a linearly-stratified medium, and found that this process differs qualitatively from the evolution of an ...
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(1995)The first measurements of the structure of black smoker chimneys suggested that they form initially by the precipitation of anhydrite from seawater, because of the reverse solubility effect due to the heating of its ...
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(2002)An experiment designed to study oxidizing perturbations in deep crystalline rock, a potential host for nuclear waste disposal, was conducted. This experiment simulated a fracture surface in contact with circulating ...
Now showing items 9039-9058 of 41800