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Browsing ELibrary by Title
Now showing items 2448-2467 of 21253
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(2001)Sulfur isotope fractionation experiments during bacterial sulfate reduction were performed with recently isolated strains of cold-adapted sulfate-reducing bacteria from Arctic marine sediments with year-round temperatures ...
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(2001)A new box model for the global carbon-calcium-strontium cycle is developed to simulate the evolution of Cretaceous and Cenozoic seawater and atmosphere. The model accounts for carbon masses in ocean and atmosphere, in ...
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(1998)The distribution and isotopic composition of helium in sedimentary basins can be used to interpret the ages of very old ground waters. The piston-flow model commonly used in such interpretation, however, does not account ...
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(1999)Carcasses of the shrimp Crangon crangon were incubated in a marine medium under oxic conditions at 15°C which was inoculated with a consortium of sulfate-reducing, sulfide-oxidizing, and fermentative bacteria. These standard ...
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(2003)In regions of frequent low-energetic explosive eruptions such as cinder cone fields, ejecta cone forming eruptions are the prime hazard whether from roof collapse or as a hazard to aircraft safety. So, observations and ...
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(2002)A conulariid–like fossil is described for the first time from Upper Vendian (late Neoproterozoic) deposits. Vendoconularia triradiata gen. et sp. nov. is found with other fossils in poorly cemented, siliciclastic deposits ...
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CONVECTION AND CRYSTALLIZATION IN A LIQUID COOLED FROM ABOVE: AN EXPERIMENTAL AND THEORETICAL STUDY (1999)Evidence from experiments and theoretical modeling suggests that systems crystallizing exclusively from the top down and rejecting a buoyant liquid effectively cease convecting once the initial superheat has been lost. We ...
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(1986)Sheet cooling occurs for most large magma bodies emplaced into the earths crust The convection that ensues is driven by the stove effect of the feeder, by cooling principally at the roof, and to an important degree by ...
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(2003)We conduct a theoretical analysis to investigate the convective instability of 3-D fluid-saturated geological fault zones when they are heated uniformly from below. In particular, we have derived exact analytical solutions ...
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(1989)In earlier publications the authors developed, within the framework of the hydrodynamic model of the evolution of the Earth, a submodel describing the heat field in the surface layer. They integrated the equation of heat ...
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(1989)The model of the thermal field in the near-surface layer that we have described elsewhere uses the equations of heat transport in the zeroth-order approximation. The equations of higher-order approximations would naturally ...
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(2000)The effects of convergence rate variations on the evolution of mature orogenic wedges are investigated using temperature-dependent variations in the viscosity of paraffin as an analogue for the natural strength distribution ...
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(1988)Ecologite, consisting of kyanite garnet, clinopyroxene and accessory rutile, coesite and diamond was repeatedly subjected to high dynamic loads, under which it underwent considerable changes, manifested in granulation, ...
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CONVERTED-WAVE MOVEOUT AND CONVERSION-POINT EQUATIONS IN LAYERED VTI MEDIA: THEORY AND APPLICATIONS (2003)We have developed improved equations for calculating the conversion point of the P-SV converted wave (C-wave) in transversely isotropic media with a vertical symmetry axis (vertical transverse isotropy (VTI)). We have also ...
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(2000)The cooling behaviour of partial thermoremanences (pTRMs) below the acquisition temperature (T2) is reported for the first time for well defined, sized, synthetic multidomain magnetite samples produced by hydrothermal ...
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(2000)Glass fragments from three different hyaloclastites have been used to evaluate the range of cooling rates experienced by undersea volcanic deposits. We found that the glass fragments retain structures with a range of ...
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(1996)The coordination environment of Ti(IV) in a variety of Ti-bearing crystalline oxide and silicate model compounds has been studied using Ti K-edge x-ray absorption fine structure (XAFS) spectroscopy at ambient temperature ...
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(1996)The coordination environment of Ti(IV) in a number of Ti-silicate and Ti-aluminosilicate glasses has been determined by x-ray absorption fine structure (XAFS) spectroscopy at the Ti K-edge at ambient temperature and pressure. ...
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(1996)The local structural environment of Ti in five Na-, K-, and Ca-titanosilicate glass/melts with TiO2 concentrations ranging from 2.7-30.5 wt% has been determined by in situ Ti K-edge x-ray absorption fine structure (XAFS) ...
Now showing items 2448-2467 of 21253