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Browsing ELibrary by Title
Now showing items 13946-13965 of 21934
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(2002)Six different 2-D prototype cellular automata models are developed to analyse the main variants of the massless automata proposed so far to reproduce earthquake physics. The analysis aims at identifying the existence of ...
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(1995)The weight ratio of organic carbon to pyrite sulfur (CS) has been observed to fall within a relatively narrow range (2.8 +/- 0.8) in most fine-grained normal marine siliciclastic sediments. Although an increasing number ...
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(2003)The northern China–Mongolia tract exhibited a tectonic transition from contractional to extensional deformation in late Mesozoic time. Late Middle to early Late Jurassic crustal shortening is widely thought to have resulted ...
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(2000)Mechanical erosion rates are important factors in understanding how continents evolve. Mechanical erosion is much faster than chemical erosion, especially for highly elevated regions of the Earth's surface. It is a principal ...
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(2003)This review paper is mainly concerned with a geochemical investigation of the deepest part of the Vostok ice core between 3310 m, the depth at which the palaeoenvironmental record present in the ice above is lost, and the ...
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(2000)Most bolides that collide with the Earth hit the sea. Limited knowledge about marine-target impacts hampers predictions about their perilousness. This study presents geological features that are particular to craters formed ...
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(2000)Numerous publications on shearing as a cause of folding do not refute the idea of buckling being the main process responsible for the formation of fold structures. Deformations of other types may either produce conditions ...
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(2001)When a target variable is sparsely sampled, compared to a densely sampled auxiliary variable, cokriging requires simplifications. In its strict sense, collocated cokriging makes use of the auxiliary variable only at the ...
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(2004)Integrated microstructural observations, X-ray powder diffractometric (XRPD) modal composition, illite Kubler index and chlorite “crystallinity” determinations and vitrinite reflectance measurements were carried out on ...
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(2003)We use a poroelastic modeling algorithm to compute numerical experiments of wave propagation in White’s partial saturation model. The results are then compared to the theoretical predictions. The model consists of a ...
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(2000)The solubility of both β-whitlockite and α-whitlockite has been experimentally determined between 1200 and 1400°C at 1 atm using a wide range of natural rocks and synthetic mixtures as starting materials. The solubility ...
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(2004)Geochemical observations demonstrate that Earth's mantle is heterogeneous, but the sizes, forms, and characteristics of its reservoirs are not constrained. Using laboratory experiments, we have systematically studied a ...
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(1998)Terrestrial noble gas isotope geochemistry provides one of the most powerful geochemical tools presently available for understanding the volatile evolution of the Earth. The data require the existence of isolated reservoirs ...
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(1999)Cold-seep communities have relatively low diversity, are dominated by one or two taxa present in high density and high biomass in comparison with the surrounding fauna, and are restricted to aphotic habitats. Their associated ...
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(1990)Since the 1950's, a large body of information has been collected on the structure and geophysical characteristics of Antarctica. Data from seismic stations both in the interior of the continent and on its coast indicate ...
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(2001)As a physical phenomenon, earthquakes must be predictable to a certain degree. However, the problem is dif®cult, becausethe source volume inside the earth is inaccessible to direct observation and because the most important ...
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(2001)The sedimentary-diagenetic structure stromatactis is widespread in Palaeozoic spiculitic carbonate mud mounds, but occurs only sporadically in Mesozoic sponge carbonate mud mounds. Comparative analysis of Palaeozoic and ...
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(2003)The common observation of sedimentary basin inversion in orogenic forelands implies that rifts constitute weak areas of the continental lithosphere. When compressed, the rifts respond with uplift of the deepest parts and ...
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(1996)Wide angle X-ray scattering (WAXS) measurements have been made on a suite of ''two-line'' ferrihydrite (FHY2) samples containing varying amounts of coprecipitated arsenate. Samples prepared at pH 8 with counter ions chloride, ...
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(1999)Bacterial populations found in subglacial meltwaters and basal ice are comparable to those in the active layer of permafrost and orders of magnitude larger than those found in ice cores from large ice sheets. Populations ...
Now showing items 13946-13965 of 21934