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Browsing ELibrary by Title
Now showing items 9774-9793 of 21934
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(2004)Radiogenic isotopes have wide application to chemical stratigraphy, geochronology, provenance studies, and studies of temporal changes in Earth surface processes. This paper briefly reviews the principles of radiogenic ...
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(2004)The paper presents the results of a survey of underwater disposal sites of potentially hazardous objects in the Kara Sea and Stepovogo Bay. The real levels of radioactivity were determined in the near and remote zones of ...
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(2001)Stokes' viscometry combined with in situ X-ray radiographic observation, using the 6-8 type multi-anvil press and synchrotron radiation, has been applied to the viscosity measurement of the Fe-FeS melt up to pressures of ...
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(2002)New data on the Maastrichtian stratigraphy in the eastern Tajik depression are discussed. Scarce remains of macrofauna and significant facies variability are main impediments to precise correlations between deposits of ...
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(2000)Radiolarian productivity pulses and related radiolarite deposition are phenomena difficult to understand from an exclusively actualistic viewpoint. Evolutionary selection pressure among silica-secreting marine plankton, ...
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(2004)Radiolarians from the Novodevich'e section, Samara oblast, are described. Two subdivisions of the section correspond to the 6.5-m-thick member of clay and chalk with Turonian-Coniacian benthic foraminifers and to the other ...
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(1997)The number and age of hyperacidic volcanism events in late-orogenic troughs of the Chatkal-Kurama structural zone are discussed on the basis of the radiometric dating. All K-Ar data available are used, including 90 original ...
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RADIOMETRIC AGES OF BASALTIC ACHONDRITES AND THEIR RELATION TO THE EARLY HISTORY OF THE SOLAR SYSTEM (1997)Pb-Pb mineral isochrons were determined for three cumulate eucrites (Moama, Moore County, and Serra de Mage) and three noncumulate eucrites (Nuevo Laredo, Bouvante, and Stannern). Two noncumulate eucrites (Bereba and ...
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(1988)Carbonate material of the glauconite-bearing horizon underwent intensive recrystallization during early diagenesis, and that glauconite is a product of that very stage of early diagenesis, and that glauconite is a product ...
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(1998)The behavior of radon emanations from rocks was observed in monitoring holes drilled in deep mines. The variation of radon concentration was found to be associated with changes in radon diffusivity controlled by the stress ...
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(2002)Scintillation properties of a Ce-doped yttrium aluminium oxide perovskite monocrystal optically coupled to a Hamamatsu H5784 photomultiplier are analyzed with a standard bialkali photocathode for radon and radon daughters ...
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(2004)In radon mineral curative waters, according to Russian mineral water classification, the radon concentration should be greater than 185Bq/l. There are about 30 mineral waters with high levels of radon in Russia. Radon-rich ...
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RADULA, OPERCULUM AND CONTRAOPERCULUM OF THE CRETACEOUS AMMONITE ACONECERAS (MOLLUSCA, CEPHALOPODA) (1990)A ridged radula with its characteristic multiapical (5 to 11 denticles) rachidial and first and second lateral teeth has been found for the first time in ammonites. The operculum, contraoperculum and radula, which together ...
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(2002)A wind tunnel study under wind-driven rains was conducted to determine the combined effect of rain and wind on the rainsplash transport process. The rains driven by horizontal wind velocities of 6, 10 and 12 m s-1 were ...
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(2001)A disaggregation methodology for the generation of hourly data that aggregate up to given daily totals is developed. This combines a rainfall simulation model based upon the Bartlett-Lewis process with proven techniques ...
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(2005)Выделено новое семейство Ralfimartitidae, включающее четыре новых рода - Ralfimartites (с R. lautus sp. nov. и R. honoratus sp. nov.), Nolvakites (c N. laxatus sp. nov.), Rozhnovites (c R. limatus sp. nov.), Body-wskites ...
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(1999)Pressures and temperatures of the diamond source region are commonly estimated using chemical equilibria between coexisting mineral inclusions. Here we present another type of geobarometer, based on determination of the ...
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(2001)For many kinds of fluid inclusions, the coupling of microthermometry and Raman microspectrometry is still the only viable option to obtain compositions of single fluid inclusions. A review is given on the basis of 16 years ...
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(2003)A Raman scattering and X-ray diffraction study of the thermal decomposition of a naturally occurring, ettringite-group crystal is presented. Raman spectra, recorded with increasing temperature, indicate that the thermal ...
Now showing items 9774-9793 of 21934