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Browsing Геология России by Title
Now showing items 2555-2574 of 39195
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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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(PANGAEA, 1991-04-19)Data of chemical analysis of Black Sea ctenophore Mnemiopsis leidyi indicates that their body contains on average 5.28% carbon, 3.48% nitrogen, 0.11% phosphorus, and 0.03% silicon on dry weight. Mean ratios of the main ...
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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 ...
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(2004)This paper describes a chemical model that calculates solute and solvent activities and solid-liquid equilibria in the H-Na-K-OH-Cl-HSO4-SO4-H2O system from dilute to high solution concentration within the 0° to 250°C ...
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(2002)Lovozero, the largest of the world’s layered peralkaline intrusions, includes gigantic deposits of Nb + REE-loparite ore. Loparite, (Na,Ce,Ca)2(Ti,Nb)2O6, became a cumulus phase after crystallisation of about 35% of the ...
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(2003)Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) was used to measure distributions of the siderophile elements V, Fe, Co, Ni, Mo, Ru, Rh, Pd, W, Re, Os, Ir, Pt, and Au in Fremdlinge with a spatial ...
Now showing items 2555-2574 of 39195