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Browsing ELibrary by Title
Now showing items 13218-13237 of 22769
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(1999)The oxidative dissolution of uranium (IV) dioxide has been experimentally investigated as a function of hydrogen carbonate concentration at 4 different temperatures (10, 25, 45, and 60°C) by using a continuous thin-layer ...
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(2002)The first and possibly only major rise of atmospheric oxygen, from pO2 =< 0.1% PAL (the present atmospheric level) to pO2 =< 10% PAL, appears to have occurred sometime before 2 Ga ago, although the exact time of and the ...
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(2001)The oxygen isotope composition of nitrate is used increasingly for identifying the origin of nitrate in terrestrial and aquatic ecosystems. This novel isotope tracer technique is based on the fact that nitrate in atmospheric ...
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(1997)The CI chondrites are taken to represent average solar system material based on the similarity of their elemental compositions to that of the solar photosphere. However, their oxygen isotope geochemistry is dominated by ...
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(2003)The P21/mC2/m displacive phase transition in the synthetic end-member amphibole Na NaMg Mg5 Si8 O22 (OH)2 has been studied by monitoring changes in unit-cell parameters and the intensities of superlattice reflections at ...
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(1986)Geotectonics is simpler than we thought, the gross structures stare naked from the world physical chart and things really are what they look like. S. Warren Carey, 1958, p.179 Abstract A short review of some basic results ...
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(2003)The Central Asian fold belt (Urals–Mongolian belt in the Russian literature), which incorporates rock units derived from a variety of geodynamic settings, evolved the Palaeo-Asian Ocean (PAO) in the Neoproterozoic and ...
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(2002)Silurian palaeobiogeography of the Ramphoprionidae (Annelida; Polychaeta) is outlined. Members of the family are reported from northern Europe (Estonia, Sweden and England), the Russian Arctic (Severnaya Zemlya), and the ...
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(2001)The large range of chemical variation within intimately associated highly magnesian volcanic rocks in the Palaeoproterozoic Central Lapland Greenstone Belt prompted the construction of a new classification scheme for ...
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(2006)Biostratigraphic charts of marine Paleocene and Eocene in the European and West Siberian parts of Russia include the unified zonations of nannoplankton, planktonic and benthic foraminifers, dinocysts, radiolarians, diatoms, ...
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(2000)We studied two sections that accumulated during the Paleocene–Eocene transition in shelf waters in the northeastern Tethys. Stable carbon isotopic compositions of marine and terrestrial biomarkers are consistent with a 13C ...
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(1996)The paper deals with the foraminifer and fossil plant biostratigraphy of heterotopic (marine, continental, volcanogenic) Paleogene sequences of the Utkholok Peninsula situated in the Tigil' stratotype region of Western ...
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(2001)The article presents results of investigations of the Paleogene section at the Kitosiya River (the Kril'on Peninsula, southern Sakhalin). The section is proposed to be the reference one for the Kril'on subzone of the ...
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(1997)We show analytically that the answer to the question, "The longer it has been since the last earthquake, the longer the expected time till the next ?" depends crucially on the statistics of the fluctuations in the interval ...
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(1997)The history of the recognition and stratigraphic investigation of the Paramonovo Formation, which is related to the discovery of the Cretaceous System in the Russian platform, is described. Detailed characteristics of the ...
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(1997)The Paratethys cyclic development (Andrusov, 1961; Nevesskaya et al., 1986) determined the main trend in investigating the composition and evolution of its biota, its hydrology, paleogeography, and tectonics. Each cycle ...
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(2001)The densities of seven K2O-TiO2-SiO2 (KTS) liquids and seven Na2O-TiO2-SiO2 (NTS) liquids have been measured between 1236 and 1771 K using the double-bob Archimedean method. In addition, the low-temperature density of these ...
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(1993)We have investigated the effect of Fe on the stabilities of carbonate (carb) in lherzolite assemblages by determining the partitioning of Fe and Mg between silicate (olivine; ol) and carbonates (magnesite, dolomite, magnesian ...
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(2000)The partitioning behavior of Na between melilite and liquid has been determined from the compositions of coexisting phases produced in slowly cooled (1°C/h) dynamic crystallization experiments on a single bulk composition ...
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(2000)The zoning of Na in the melilite of Type B1 Ca-, Al-rich inclusions from carbonaceous chondrites reflects a combination of factors including the maximum temperature, Tmax, for melting, bulk composition, crystal dimensions ...
Now showing items 13218-13237 of 22769