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Browsing ELibrary by Title
Now showing items 1957-1976 of 21934
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(1985)Estimation of equation of state parameters for Sn++ and calculation of the thermodynamic properties of other aqueous species and dissociation constants for various stannous and stannic complexes as a function of temperature ...
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(1997)Experiments have been conducted to investigate the chemical reduction of nitrate under conditions relevant to the often low organic carbon environment of groundwaters. At pH 8 and 20+/-2°C, in the presence of Cu(II), NO-3 ...
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(1995)The magnetic fraction was separated from the Richardton H5 chondrite with a hand magnet and was leached with concentrated HF at high temperature for different periods. The resulting metallic fractions and the untreated ...
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(2002)The high molecular weight fraction of dissolved organic matter in a suite of lakes, rivers, seawater, and marine sediment interstitial water samples was collected by ultrafiltration and characterized by molecular level and ...
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(1998)Data are reported for thirty iron meteorites that are members of the magmatic groups, for three main group pallasites, one anomalous mesosiderite, and for three ungrouped irons and an ungrouped pallasite that are similar ...
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(2004)Results of electron microprobe analyses (70 determinations) of minerals in the Karasug deposit of complex ores (Fe, F, Ba, Sr, TR, U, and Mo) in Tuva are presented. The chemical compositions and other properties of minerals ...
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(2004)The detailed investigation of melt inclusions in nepheline and perovskite showed that the rock formation proceeded from incompletely saturated with silica high-Ca magmatic melt substantially enriched with alkaline, rare ...
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(2004)The analyzed (by mass spectrometry) samples were collected in different time (1953-1993) at downstream of 9 rivers - Amudar'ya, Ural, Volga, Don, Kuban', Rion', Severnaya Dvina, Ob' and Enisei. The results indicate rather ...
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(2001)Using trace element ratios with a common reference to a refractory element, we have shown that carbonaceous chondrites define a straight line in every diagram including the semi-volatile and volatile elements with the ...
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(1989)The data from cores of deep and ultradeep drillholes allow us to identify the depths associated with the various temperature intervals (i.e., the depths at which various volatile components were liberated), the compositions ...
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(1987)Compositional differences between pegmatite and its parent rocks in an earlier article were shown to be basic to solving the problem of the mode of separation of pegmatite melt. In that article, though, such differences ...
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(2003)Melt inclusions in minerals from some volcanoes of the Kurile-Kamchatka region were examined. The studied basaltic andesites and andesites were sampled from volcanoes of the Central Kamchatka depression (Shiveluch and ...
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(2004)Carbonate rocks at the Bayan Obo giant rare earth element (REE)–Nb–Fe ore deposit, Inner Mongolia, China are divided into four categories: sedimentary limestone and dolostone (H8s), deformed mineralized coarse-grained ...
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(1988)The average chemical compositions of the continental crust and the oceanic crust (represented by MORB), normalized to primitive mantle values and plotted as functions of the apparent bulk partition coefficient of each ...
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(1999)We have measured effective binary chemical diffusion coefficients for Be, B, Mg, Ca, Ti, Ge, Sr, Y, Zr, Nb, Cs, Ba, Nd, Tb, Lu, Hf, Ta, and W at concentrations below 1000 ppm in synthetic granitoid melts by performing ...
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(1996)The chemical dissolution of galena(001) surfaces immersed in acidic and neutral sulfate electrolyte solutions was investigated using Electrochemical Scanning Tunneling Microscopy (ECSTM). The nanometer-scale detail provided ...
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(2003)To summarize, stable correlations have been found between chemical elements as regards their distribution trends. Three groups of elements differing in their concentrations in the snow-soil system have been recognized. The ...
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(1989)Manganese nodules of the ocean are multicomponent ores, whose resources approach one trillion tons and will be commercially exploited in the not too distant future. The problem of the mineral phases to which the chemical ...
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(2000)Reaction cells are proposed by which magma bodies move by cycling excess energies along gradients of temperature, pressure and composition in open systems and gravitational fields of the earth. Crystallization energy ...
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(2004)While many uncertainties remain, a kinetic evaporation-condensation model is used to show that type A chondrules, and compact Type A and B calcium-aluminum-rich inclusions (CAIs) could have formed from CI-like precursors ...
Now showing items 1957-1976 of 21934