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Browsing ELibrary by Title
Now showing items 10240-10259 of 21879
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(1989)Following its conversion from Eu3+ to Eu2+ under reducing conditions that result when an excess of organic matter is present, europium migrates in sedimentary rock at rates higher than the other rare earth elements. It ...
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(1988)Microorganisms are effective geochemical agents by virtue of their greater metabolic diversity, and thus their greater biochemical versatility, than plants and animals. The involvement of microorganisms in the solution and ...
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(2003)Correlation and synthesis of published and new structural, paleomagnetic, geochronological, and paleogeographic data from the Altai-Sayan and East Kazakhstan orogenic areas in Central Asia show an important role of strike-slip ...
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(2001)Ultrapure quartz samples from deposits of the Netherpolar Urals were studied by the EPR technique. Almost all samples contain an impurity of high-temperature beta-quartz, which is not related to the thermal conditions of ...
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ROLE OF THE BACKSTOP-TO-COVER THICKNESS RATIO ON VERGENCE PARTITIONING IN EXPERIMENTAL THRUST WEDGES (2001)The ratio between the thickness of the sedimentary sequences offscraped from the subducting plate (H c ) and the average thickness of the backstop (H b ) is expected to significantly influence vergence partitioning in ...
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(1987)In microbiological generation, bacteria can play a dual role: producing a catalytic effect that promotes the oxidation of manganese and thus converts it to insoluble form (heterotrophic bacteria), or accumulating iron in ...
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(2004)The energy of interface formation is an important parameter that controls the evolution of magmatic systems. The energy factor plays a critical role during phase transitions at the beginning of crystallization, melting, ...
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(2004)An example of fluorite from the Voznesenka Ore District was used to demonstrate the importance of mineralogical studies for interpreting the results of an isotopic research conducted to reveal the age relations between the ...
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(2002)We report experiments in basalt oversaturated with water to duplicate the nodular ore textures of podiform chromitite ores. In immiscible basalt–water systems saturated with olivine and chromite, olivine will reside in the ...
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(2002)Field measurements of the resuspension of medium/coarse sand by orthogonal wave-currents in approximately 20 m water depth are presented and discussed. Velocity squared-suspended sediment cospectra indicate resuspension ...
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(1999)In order to investigate the effects of melt movement on material transport, dissolution and crystal growth in partially molten rock systems, a new apparatus was designed to move partial melt. Spherical specimens with low ...
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(2005)Room-temperature magnetic techniques are rapidly becoming an important tool for the discrimination and quantification of minerals in a broad range of geological, environmental and extraterrestrial materials. The utility ...
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(2001)Soil hydraulic properties are necessary for many studies of water and solute transport but often cannot be measured because of practical and/or financial constraints. We describe a computer program, rosetta, which implements ...
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(2002)We report the results of thermal convection experiments in a rapidly rotating hemispherical shell with a heterogeneous heat flux at the outer boundary to model the effect of a thermally heterogeneous core-mantle boundary ...
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(2003)The two-dimensional analysis of rotation of rigid ellipsoidal inclusions is not applicable to situations in which either the bulk deformation deviates from plane-strain or one of the principal axes of the inclusion is at ...
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(2001)We used experiments to investigate the behaviour of rigid elliptical cylinders embedded in a viscous fluid of finite thickness, and for very small ratios (S) between shear zone width (z) and the shortest principal axis ...
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(2001)Orogenic gold vein deposits require a particular conjunction of processes to form and be preserved, and their global distribution can be related to broad-scale, evolving tectonic processes throughout Earth history. A ...
Now showing items 10240-10259 of 21879