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Browsing ELibrary by Title
Now showing items 240-259 of 21936
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(2005)A refined Avrami method, that assumes that the activation energy is a function of reaction extent y, was used to analyze the kinetics of the exsolution of pentlandite from mss/pyrrhotite (bulk composition, (Fe0.77Ni0.19)S) ...
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(1996)Pedogenic carbonates are sensitive paleoclimatic and paleomonsoonal indicators, stratigraphic markers and important sources and sinks in the global CO budget. Establishing a chronology of such carbonates has been difficult ...
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(2002)The electron localization function, η, evaluated for first-principles geometry optimized model structures generated for quartz and coesite, reveals that the oxide anions are coordinated by two hemispherically shaped ...
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(2001)This paper proposes an extension of a single coupled Markov chain model to characterize heterogeneity of geological formations, and to make conditioning on any number of well data possible. The methodology is based on the ...
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(2002)We introduce a formalism to calculate shear-wave seismograms for weakly-anisotropic and inhomogeneous media. The method is based on the combination of the forward-propagator method, which accounts for shear-wave interaction ...
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(1996)The sedimentary budgets of 12C and 13C were determined for the well-characterized coastal site of Cape Lookout Bight, North Carolina, USA. Degradation of organic carbon with a δ13C value of −19.2 ± 0.2‰ proceeds via sulfate ...
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(1995)We present a method for calculating quantitative melting reactions in systems with multiple solid solutions that accounts for changes in the mass proportions of phases between two points at different temperatures along a ...
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(1996)The formation of bauxite due to weathering of a granitic protolith has been simulated by means of a one-dimensional flow and reaction model based on the mass transfer principle. The model couples mineral dissolution and ...
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(2002)Rainfall simulators are used to study a variety of different processes (e.g., water erosion, infiltration, overland flow, irrigation, movement of agrochemicals, etc.). Wind affects field experiments that make use of rainfall ...
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(2001)The two-layer model of the upper crust waveguide developed in [Karakin, 1990a, Karakin and Kambarova, 1997] is studied. The upper layer is poroelastic and the lower layer (the waveguide proper) can be in poroviscous or ...
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(1995)Properly scaled physical modelling of the subduction of continental lithosphere is performed with a three-layer lithospheric model. The model includes a strong upper crust, a weak ductile lower crust, and a strong mantle ...
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(1998)It is well-known that the shear viscosity of silicate-rich melts is very sensitive to water content. Thus, as such, a material rises towards the earth's surface in an eruption, the pressure falls, water exsolves to form ...
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(2003)A previous contribution from our laboratory reported the formation of hydrogen peroxide (H2O2) upon addition of pyrite (FeS2) to O2-free water. It was hypothesized that a reaction between adsorbed H2O and Fe(III), at a ...
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(2004)The solid solution-aqueous solution system KCl-KBr-H2O is used as a model system to determine the mechanism of the replacement process of one crystalline phase by another. A single crystal of KBr was allowed to react with ...
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(2004)Inside continents and on their edges, deep sedimentary basins such as Caspian, Southern Caspian, Barents, Black-Sea, and other ones exist. Thickness of sediment layers in them are 15 to 20 km and more. According one version ...
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(2001)A reductive mechanism is proposed to explain the sudden changes from oxidative (acid-producing) to nonoxidative (acid-consuming) dissolution that can occur with pyrrhotite. Typically, in acidic conditions, an initial period ...
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(1999)A new mechanistic model for the crystal growth kinetics of calcite is presented, accounting for the presence of various surface complexes. Calcite crystal growth rates were determined with the constant composition method ...
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(2000)A mechanistic model is presented to quantify both the physical and biochemical fractionation events associated with hydrogen and oxygen isotope ratios in tree-ring cellulose. The model predicts the isotope ratios of ...
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(2001)A mechanistic model is presented on the processes leading to methane oxidation in rice rhizosphere. The model is driven by oxygen release from a rice root into anaerobic rice soil. Oxygen is consumed by heterotrophic and ...
Now showing items 240-259 of 21936