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Browsing ELibrary by Title
Now showing items 5095-5114 of 21821
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(2001)“IGCP” Projects 259 (International Geochemical Mapping) and 360 (Global Geochemical Baseline) under the aegis of UNESCO's International Geochemical Correlation Program made recommendations for standardizing geochemical ...
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(1999)Principal geological and paleogeographic events of the Late Cretaceous time are considered. Movements of continental blocks, changes in oceanic and atmospheric circulation, and interrelated climatic fluctuations during the ...
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(2004)Key Words glacial isostasy, mantle viscosity, ice-age ice sheets, paleotopography s Abstract The 100 kyr quasiperiodic variation of continental ice cover, which has been a persistent feature of climate system evolution ...
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(2002)The global heat flow is the surface representation of thermal processes within the earth's mantle. The long-wavelength pattern of observed heat flow closely resembles the plate tectonics and its most prominent feature is ...
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(1997)Radiometric dating, including numerous high-precision U-Pb baddeleyite and zircon ages, of Paleoproterozoic flood basalts, dike swarms, and layered mafic intrusions worldwide, indicates that a substantial volume of mafic ...
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(2003)We review the present status of global mantle tomography and discuss two main classes of models that have been developed in the past 10 years: P velocity models based on large datasets of travel times from the International ...
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(2005)After having re-read all the relevant literature on methane emission by mud volcanoes and after having recalculated my own flux estimates, it looks as if the problem with these papers are not the variations in total numbers, ...
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GLOBAL METHANE EMISSION THROUGH MUD VOLCANOES AND ITS PAST AND PRESENT IMPACT ON THE EARTH'S CLIMATE (2003)Mud volcanism is an abundant, global phenomenon whereby fluid-rich, low-density sediments extrude both on land and offshore. Methane, which generally exceeds 90vol% of the gas phase, is emitted at high rates during and ...
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(2003)In order to better understand the functioning of the Earth's climatic system and forecast its changes, it is necessary to investigate the contribution of different natural and anthropogenic sources to the global methane ...
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(2002)The possible drawdown of a massive CO 2 atmosphere in early Earth history is discussed using two working hypotheses: first, that this removal of CO 2 from the atmosphere occurred mainly via silicate weathering; second, ...
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(1992)The late Precambrian and Cambrian world experienced explosive evolution of the biosphere, including the development of biomineral skeletons, and notably of phosphate and siliceous skeletons in the initial stages of the ...
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(2004)This paper presents a comparison of ray-theoretical and finite-frequency traveltime tomography for compressional waves. Our data set consists of 86 405 long-period P and PP-P traveltimes measured by cross-correlation. The ...
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(2001)By means of a new theoretical model of global postseismic deformation we compute the time-depending postseismic stress field associated with eight of the greatest events of the century on an area extending for almost half ...
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(1988)There has recently been a great increase in interest in the origin of global relief of the earth and in elucidating the patterns of its development. In the present paper we attempt to approach the problem from an energy ...
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(2002)We present a new worldwide $1/16°× 1/16°$ map of seafloor topography computed from an iterative inversion combining altimetry measurements of the marine geoid and shipboard echo soundings from the global National Geophysical ...
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(2002)We infer the fine structure of a sub-Moho boundary layer (SMBL) at the top of the lithospheric mantle from high-resolution seismic observations of Peaceful Nuclear Explosions (PNE) on superlong-range profiles in Russia. ...
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(1999)The main problem associated with the study of silicate weathering using river dissolved load is that the main control of solute chemistry is lithology and that all rivers are influenced by carbonate and evaporite weathering. ...
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(2002)The experimentally determined directions of the maximum horizontal compressive stress SH, max in the western European stress province (WESP) of the West European platform are mostly oriented northwest with an average azimuth ...
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(1989)Pangea, the Earth's youngest single supercontinent, broke up 180 million years ago. Tectonic plates were subsequently formed by dispersal of the continental fragments and accretion of new oceanic lithosphere. The configurations ...
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(2001)Convergent margin processes play an important role in the distribution of terrestrial volatile species. During subduction processes volatiles are filtered from the subducting package and are restricted to return to the ...
Now showing items 5095-5114 of 21821