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Browsing ELibrary by Title
Now showing items 8372-8391 of 21768
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(2002)The theory of the proton magnetic resonance sounding (a.k.a. surface nuclear magnetic resonance) was first developed in free space. In this case, the alternative excitation field has no phase variation. Hence there is no ...
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(2004)Existing models for seismic wave velocity dispersion and attenuation in porous rocks containing a mixture of two pore fluids are based on the assumption of a regular distribution of the fluid phases. However, in reality ...
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(2001)This paper investigates the ability to retrieve the true soil moisture and temperature profiles by assimilating near-surface soil moisture and surface temperature data into a soil moisture and heat transfer model. The ...
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(2000)Cetyltrimethylammonium-and tetradecyltrimethylammonium-intercalated magadiites were prepared by direct syntheses, starting from sodium metasilieate (NaaO/SiO2 = 1.0) and nitric acid. Total substitution of sodium by ...
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(2002)During the last three billion years, the Earth has been experiencing a slow global cooling, expressed in the progressively increasing frequency and scale of glacial events. Based on these indications, geologic history can ...
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(1991)An examination was made of the nomenclature, distribution, petrogeochemical characteristics and relationship with mineralisation of dyke rocks with an exotic rare-metal composition - ongonites (sodium branch) and elvanites ...
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(2001)The rapid depressurisation and discharge of volatile rich silicic magma chamber and the onset of caldera collapse associated with ignimbrite eruption is investigated using combined theoretical and experimental approaches. ...
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ONSET OF CONNECTIONS BETWEEN THE PACIFIC AND ARCTIC OCEANS THROUGH THE BERING STRAIT IN THE NEOGENE (2004)New data on the Neogene diatoms, mollusks, and magnetostratigraphy in the North Pacific and surrounding structures suggest the Bering Strait incipient opening in the latest Miocene or probably in the earliest Pliocene. ...
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(2003)Low summer insolation would increase Northern Hemisphere ice sheets only if winter snow persisted all year. Lake Baikal records reveal that such a climatic threshold may have been reached at around 4.0 Ma. Insolation minima ...
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ONSET OF SUBDUCTION AS THE CAUSE OF RAPID PLIOCENE-QUATERNARY SUBSIDENCE IN THE SOUTH CASPIAN BASIN (2002)Backstripping a representative stratigraphic column from the northwest of the South Caspian basin shows that 2.4 km of tectonic subsidence has occurred since ca. 5.5 Ma, at 1.5–10 times the rate recorded in typical foreland ...
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(2001)Ontogenetic trends (umbo to growth edge of shell) in aspartic acid (Asp) racemization and amino acid composition and their evolution over time are examined in serial samples of annual growth bands from a time-series of ...
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(2001)The chemistry and mineralogy of a group of opaque mineral assemblages in the matrix of the Bishunpur LL3.1 ordinary chondrite provide insight into the nebular environment in which they formed. The assemblages consist of a ...
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(2002)Vent processes were examined at Karymsky volcano, Kamchatka, by measuring SO2 emissions using a correlation spectrometer (COSPEC). Continuous high-sensitivity COSPEC measurements and physical observations were collected ...
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(2000)It is commonly assumed that an olivine-hosted melt inclusion is chemically isolated from the melt surrounding its host crystal. This assumption is probably valid for slow-diffusing, incompatible trace elements, but for ...
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(2004)Significant petrogenetic processes governing the geochemical evolution of magma bodies include magma <unl>R</unl>echarge (including formation of ‘quenched inclusions’ or enclaves), heating and concomitant partial melting ...
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(2004)Significant petrogenetic processes governing the geochemical evolution of magma bodies include magma <unl>R</unl>echarge (including formation of ‘quenched inclusions’ or enclaves), heating and concomitant partial melting ...
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OPERATIONAL TECHNOLOGY FOR SNOW-COVER MAPPING IN THE CENTRAL ASIAN MOUNTAINS USING NOAA-AVHRR DATA (2001)An important problem in the evaluation of snow in mountains, is that of the observation and mapping of snow cover variations which is required for snowmelt runoff forecasting in mountain river basins. Satellite data are ...
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(2003)A major new synthesis of ophiolite geochronology and map of global Phanerozoic distribution indicates that previously noted pulses of ophiolite obduction can be linked to superplume-related tectonism. A marked cyclicity ...
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(2004)Ophiolites show a wide range of internal structure, pseudostratigraphy and chemical fingerprints suggesting various tectonic settings of their origin. In general, they are characterized as mafic-ultramafic assemblages and ...
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(2004)Isotopic profiles through ophiolite complexes provide the necessary link between the study of global geochemical cycles and plate tectonics. The hydrothermal circulation that occurs beneath the sea floor is the primary ...
Now showing items 8372-8391 of 21768