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Browsing Геология России by Title
Now showing items 6340-6359 of 39126
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(1998)Analysis of long-period shear-wave underside reflections from upper mantle discontinuities shows the shape of the 410 km discontinuity to be neither globally nor locally correlated with that of the 660-km discontinuity. ...
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(2003)Previously, minimal work has been carried out on conulariids due to their rare occurrences and resultant biostratigraphical limitations. The palaeobiogeographical distribution of Permian conulariids suggests that they have ...
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(2004)The GPS/MET satellite measurements during years 1995–1997 at altitudes 2–35 km are used to obtain global distributions of meso-scale variances of the refraction index (“dry temperature”) at different stratospheric altitudes. ...
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(2004)It is generally assumed that oceanic gas hydrates contain a huge volume of natural gases, mainly methane. The most widely cited estimate of global hydrate-bound gas is 21×1015 m3 of methane at STP (or ∼10,000 Gt of methane ...
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(2001)Thick, unmetamorphosed successions of siliciclastic and carbonate rocks in eastern and western Siberia preserve a record of Middle Riphean to Early Upper Riphean sedimentary environments and geochemistry. Consistent with ...
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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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(PANGAEA, 2004-11-16)
Now showing items 6340-6359 of 39126