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Browsing ELibrary by Title
Now showing items 3214-3233 of 21936
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(1990)Comparison of maps of the distribution of stratiform polymetallic ore deposits with hydrochemical and salt maps shows the almost universal confinement of such deposits both directly to salt-generating basins and to their ...
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(1999)New data on the chemical composition of bulk samples, and of metallic and nonmagnetic fractions of six CR chondrites (Renazzo, Y793495, PCA91082, EET92042, Acfer 209 and El Djouf 001) are reported. It is shown that volatile ...
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(1989)Our study of pyrope garnets in Quaternary terrace deposits showed that the distribution of silica concentrations in them could be described by a regular second-degree trend surface when it was plotted in MgO-Al2O3 and ...
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(1989)We studied diamond crystals from kimberlites, including colorless octahedra, rhombododecahedra, less often cubes, and forms transitional between them, and from metamorphic rocks, including yellow and yellow-green cubes, ...
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DISTRIBUTION OF TRACE ELEMENTS AMONG THE ROCK-FORMING AND ACCESSORY MINERALS OF URALIAN GRANITOIDS (2004)The distribution of trace elements among rock-forming and accessory minerals was studied in the granodiorites of the central (Chusovskoi, Shabrovskii, Verkhisetskii, and Shartashskii plutons) and southern (Smolinskii and ...
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(1998)The experimental distribution coefficients, K'd, for trace elements in carbonate minerals show a systematic pattern of behavior that differs from that expected if the distribution were controlled by equilibrium thermodynamics. ...
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(1998)The experimental distribution coefficients, K'd, for trace elements in carbonate minerals show a systematic pattern of behavior that differs from that expected if the distribution were controlled by equilibrium thermodynamics. ...
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DISTRIBUTION OF TRACE ELEMENTS BETWEEN CLAYS AND ZEOLITES AND AQUEOUS SOLUTIONS SIMILAR TO SEA WATER (1992)The mechanisms of solid-solution partitioning during mineral crystallization in sea water have been investigated for Rb, Cs, Co, Sr, U, Th and lanthanides as trace elements, and Fe, Mg-chlorite/smectites and Na-zeolites ...
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(2003)The distribution of trace elements (Li, Rb, Cu, Zn, Pb, Sn, Ag, Au, and Hg) was studied in trap sills of two intrusive phases in the southern Siberian Platform. Cluster and factor analyses of the composition of 86 trap ...
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(1989)The recent study of submarine volcanoes of the Kurile island arc on cruises of the R/V Vulkanolog revealed the distribution in space of all Holocene volcanoes here and, therefore, allowed them to be analyzed in connection ...
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(1996)W and Mo abundances in the bulk metals of 10 H, 5 L and 6 LL chondrites were determined by instrumental neutron activation analysis (INAA). Partitioning of W and Mo between metal and non-metal phases was evaluated by ...
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DISTRIBUTION PATTERNS OF DIFFERENT FORMS OF PHOSPHORUS IN SOME SURFICIAL SEDIMENTS OF THE BALTIC SEA (1991)The lateral distribution patterns of different forms of phosphorus (P) in some Baltic Sea sediments were investigated by a sequential extraction procedure. The distribution and amount are mainly related to redox state, ...
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(2002)This paper describes coal petrographic characteristics, sulfur abundance, distribution and isotopic signature in coals in the Wuda coalfield, Inner Mongolia, northern China. Petrographic studies suggest that depositional ...
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(2001)The Cretaceous/Tertiary (K/T) boundary, with an age of 65 million years before present, is associated with the mass extinctions of dinosaurs and other terrestrial and marine organisms. Evidence for the K/T boundary is ...
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(2002)It has recently been shown that membrane lipids of marine crenarchaeota, a ubiquitous and abundant component of plankton, occur in relatively high concentrations in recent and ancient sediments. In this study we investigated ...
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(1999)Although recent research has indicated that bacteria may contribute an important fraction of biochemical residues in terrestrial and marine environments, it is difficult for geochemists to identify contributions from these ...
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(1988)The increased sensitivity and frequency resolution of the laser-interferometric strain seismometer makes it possible to undertake new types of investigation of the correlation between high-frequency microseism-induced ...
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DISULFIDE DISPROPORTIONATION AND CDS FORMATION UPON CADMIUM SORPTION ON FES2 - THEORY AND EXPERIMENT (2000)Adsorption reactions are important for understanding the distribution of ions between aqueous and solid phases; they govern solution concentrations, bioavailability, and mobility of ions in the environment. Iron disulfide ...
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(1988)The paper reports on a study which shows that there is a diurnal variability in the distribution of suspended forms of heavy metals; the temporal variation in the concentration of suspended matter and in the suspended forms ...
Now showing items 3214-3233 of 21936