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Browsing ELibrary by Title
Now showing items 10300-10319 of 21821
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(1985)At the same Mg-number, a decrease is observed in the average content of Ni, Co, and Cr in basalts between 2.5 and 2.0 b.y. Such decreases can be accounted for by smaller degrees of melting in the mantle in response to ...
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(2003)An extension of the seawater secular-variation model that successfully predicted the observed timing of Phanerozoic MgSO4 vs. KCl marine evaporites and aragonite seas vs. calcite seas has been applied to the prediction of ...
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(1998)Stable carbon isotopic compositions of C15+ saturate and aromatic hydrocarbon fractions from 514 crude oils from known source rocks were examined for secular, episodic variations. The oils have been correlated by means of ...
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(2004)A new concept of a "living ocean" is based on thousands of analyses of suspended particulate matter from all oceans, in situ studies of particle fluxes and sedimentation rates, and mass estimates of present and past (in ...
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(2003)The effects of sediment surfaces on methane hydrate formation and dissociation were investigated using colloidal suspensions and new experimental methods developed for a large volume (72 liters), temperature-controlled ...
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(2003)In nature, erosive rainstorms are usually associated with high winds. Therefore, a quantification of wind and rain interactions and the effects of wind on detachment and transport processes provides a great opportunity for ...
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(2003)The understanding of soil erosion processes and the development of accurate erosion prediction models require understanding of detachment, deposition, and sediment transport in rills. The objectives of this study were to ...
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(2004)Sedimentary basin inversion, the shortening of formerly extensional basins, is accommodated mainly by compressional reactivation of extant faults and fractures across a wide range of scales. As such, inversion is a large-scale ...
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(2001)The Riphean to Vendian ( ≈1600–540 Ma) sedimentary succession of the southeastern margin of the Siberian platform is 12–14 km thick and consists of terrigenous-carbonate successions termed, from oldest to youngest, the ...
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SEDIMENTARY IRON GEOCHEMISTRY IN ACIDIC WATERWAYS ASSOCIATED WITH COASTAL LOWLAND ACID SULFATE SOILS (2006)We examined the solubility, mineralogy and geochemical transformations of sedimentary Fe in waterways associated with coastal lowland acid sulfate soils (CLASS). The waterways contained acidic (pH 3.26-3.54), FeIII-rich ...
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SEDIMENTARY MO ISOTOPE RECORD ACROSS THE HOLOCENE FRESH-BRACKISH WATER TRANSITION OF THE BLACK SEA (2005)Mo isotope data on Black Sea sediments spanning the transition from Pleistocene oxic–limnic conditions to the prevailing anoxic marine conditions are presented. Samples were taken from a gravity core collected at a water ...
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(2003)Biomarker and carbon isotopic analyses of piston core samples were undertaken to reconstruct changes over the last 130 kyr in the delivery of organic matter from marine plankton and terrestrial sources to sediments on the ...
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(2005)The MER rover Opportunity has carried out the first outcrop-scale investigation of ancient sedimentary rocks on Mars. The rocks, exposed in craters and along fissures in Meridiani Planum, are sandstones formed via the ...
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(2003)Studies of submarine impact craters resulting from impacts of comets or asteroids demonstrate that the presence of water and the physical properties of target rocks have a major influence on sedimentary processes associated ...
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(2002)Permo-Triassic reservoirs of the Saigak Field, in the eastern part of the Precaspian Basin of Kazakhstan, produced oil at cumulative rates exceeding 3600 BOPD. This confirms the attractiveness of the post-salt play in this ...
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(2004)The largely lower Pliocene Productive Series and its regional equivalents contain the major hydrocarbon reservoirs of the South Caspian Basin. Examination of outcrops in the Apsheron region, Azerbaijan, has resulted in ...
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SEDIMENTATION OF MONODISPERSE SILICA SPHERES AND THEIR COAGULATION AGGREGATION AT HIGH TEMPERATURES (2004)The effect of high temperatures on the sedimentation of suspensions of monodisperse silica spheres (MSS) is considered. The MSS suspensions chosen as a model for our research, with ethanol as a dispersion medium, are stable ...
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(2000)With this paper we present a first attempt to combine the direct results on lithology, composition and age dating in the boreholes BDP-93, BDP-96 and BDP-97 with geological and seismic data from the areas where those ...
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(1996)In recently formed marine barite (BaSO4) separated from two equatorial Pacific cores 226Ra activity exceeds that of its parent 230Th by at least an order of magnitude, indicating radium uptake during barite precipitation. ...
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(2001)A modelling exercise was undertaken to evaluate the positive (preservational) and negative (diluent) effects of sedimentation rate (SR) on the total organic carbon (TOC) content of marine sediments, and to use multiple ...
Now showing items 10300-10319 of 21821