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Browsing ELibrary by Title
Now showing items 280-299 of 22185
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(2003)“Plateau” δ18O values of CO2 that evolved from the Fe(CO3)OH component during isothermal vacuum dehydrations (200–230 °C) of 18 natural goethites range from 8.2 to 28.1‰. In contrast, the measured δ18O values of the goethite ...
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(1993)Infrared spectra of H 2 O - and D 2 O - NaAlSi 3 O 8 (albite) glasses were measured and contain two major differences from the anhydrous glass spectra. The first is the presence of a number of bands above 3000 cm -1 arising ...
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(2005)We present a model of bacterial sulfate reduction that includes equations describing the fractionation relationship between the sulfur and the oxygen isotope composition of residual sulfate (δ34SSO4_residual, δ18OSO4_residual) ...
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(2002)A coupled creep-compaction and chemical-reaction model is developed to predict the porosity evolution for quartzose sandstones as a function of strain. The model also demonstrates the relative importance of grain-contact ...
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(1995)Quartz cementation is an important process of porosity reduction in sandstones. A mathematical model is presented for predicting the distribution and amount of quartz cement in a sandstone reservoir as a function of time ...
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(2003)On the basis of the synthesis of natural data and thermodynamic computer modeling of geochemical processes in water-rock systems under various boundary conditions (S : L ratio, P-CO2, and temperature), the nature of inverse ...
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(2000)A model to compensate the 2:1 layer having excess negative charge owing to the reduction of Fe 3+ to Fe 2+ by sodium dithionite buffered with citrate-bicarbonate in nontronite, beidellite, and mont- morillonite is proposed. ...
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(2003)The relatively low rates of magma production in island arcs and continental extensional settings require that the volume of silicic magma involved in large catastrophic caldera-forming (CCF) eruptions must accumulate over ...
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(2003)The crystal structure of kingite, Al3(PO4)2(F,OH)2·8(H2O,OH), a secondary mineral from a Cambrian-Precambrian phosphate deposit at Tom’s Quarry, near Kapunda, South Australia, has been determined from a powder sample using ...
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(1999)A comparative study of wave excitation by bottom movements in a compressible and an incompressible perfect fluid was carried out using a linear potential theory. An analysis of the resulting exact analytical solutions ...
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(1994)Fragmentation of magma containing gas bubbles is of great interest in connection with developing models for the formation of pyroclastics and for volcanic blasts (explosions). This paper considers the problem of fragmentation ...
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(1996)We present a numerical model of sedimentary early diagenetic processes that includes oxic and anoxic mineralization. The model belongs to the new wave of early diagenesis models that account for depth-dependent bioturbation ...
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(2000)We describe here a model of formation of the core and the early history of Earth based on recent experimental mineralogical data. In a nebular setting, where differentiated planetesimals with their iron cores were plentiful, ...
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(2002)Barite-celestite crystals can be synthesized from aqueous solutions during counter-diffusion in a gel column connecting two reservoirs. It is known that such crystals may exhibit oscillatory zoning, whereby the barium ...
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(1995)A model is proposed for oxygen isotope fractionation in body water of terrestrial, herbivorous mammals larger than 1 kg. The goal of this model is to estimate the oxygen isotopic composition (δ18O) of intake water in order ...
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(2005)The relationships between the global carbon cycle and paleo-climates on short and long time scales have been based on studies of accumulation rate of the two main components of the sedimentary carbon reservoir, organic ...
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(2004)The key to three-dimensional discontinuous deformation analysis (3D DDA) is a rigorous contact theory that governs the interaction of many three-dimensional blocks. This theory must provide algorithms to judge contact types ...
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A MODEL OF THE EARLY EVOLUTION OF KARST AQUIFERS IN LIMESTONE IN THE DIMENSIONS OF LENGTH AND DEPTH (2001)A new model of the early evolution of limestone karst aquifers in the dimensions of length and depth is presented. In its initial state the aquifer consists of a rock massive with evenly spaced fractures of about 50μm ...
Now showing items 280-299 of 22185