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Browsing Геология России by Title
Now showing items 7645-7664 of 39126
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(2001)The ocean accounts for over 90% of the active pools of carbon on the Earth’s surface, with over 95% of marine carbon in the form of dissolved inorganic carbon (DIC) (Hedges and Keil 1995). Organic carbon dissolved in the ...
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(2004)Spatial and structural association of ultramafic alkaline massifs of the Krasnyi Mai Complex with fault-related blastomylonite zones containing graphite and fine-dispersed diamonds requires special attention.
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(2004)Paleo-reconstruction of one new-Caspian transgression stage was carried out on the base of analysis of oxygen and carbon stable isotopes' content as well as of some metals in bivalve mollusk shells. Dynamics of δ18C values ...
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(1988)The contents of the inclusions were determined in a device that used mechanical grinding. A mortar and pestle joined by a bellows were connected directly to a vacuum system that included traps cooled with a mixture of dry ...
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(2004)Carbon isotope data have been obtained for diamonds in diamondites (framesites, polycrystalline diamond) of unknown origin (presumably from southern Africa), which contain minor amounts of garnet (plus rare clinopyroxene). ...
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(1990)The isotopic composition of carbon in oils and condensates of the Chukotka Peninsula was studied in samples taken from wells on the verkhne-Tekelay, Verkhne-Echinskaya, and Izmennaya tracts, located in the southern part ...
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(1997)Isotopic composition of Sr, O, Nd, and Pb was determined in K-Na alkaline gabbroids and basaltoids that formed in eastern Kamchatka during Middle Miocene (gabbroids of the subvolcanic complex) and Late Miocene (basaltoids ...
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(1996)An acid residue from the Dhajala meteorite which carries the noble gas component of the pure Q-phase, has been analyzed for nitrogen and noble gases by step-wise heating pyrolysis. From Ne data we derive (20)Q = 10.48 +/- ...
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(1989)In an earlier paper, we used an isotopic investigation of the mineral associations of a tin deposit of the cassiterite-silicate association to bring out a trend in the isotopic composition of oxygen in the aqueous phase ...
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(2003)We have analyzed by thermal ionization mass spectrometry (TIMS) the isotopic composition of Cr in five progressive etches of size-sorted plagioclase grains separated from lunar soils 60601 and 62281. Aliquots of the etch ...
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ISOTOPIC COMPOSITION OF THE SULFUR IN PYRITE AND PYRRHOTITE SYNTHESIZED AT 300 TO 500°C AND 1 KBAR (1989)The isotopic composition of the sulfur in synthetic pyrite (Pt) and pyrrhotite (Pr) was studied as a function of the reaction temperature (T) and oxygen fugacity fO2. These minerals were synthesized by the hydrothermal ...
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(1989)Investigating the isotopic characteristics of carbon in eclogite from kimberlite is of interest both for identifying the character of the eclogite material itself and for investigating the fractionation of carbon under ...
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(2006)We determined by ICP-MS the concentrations and isotopic ratios of Fe, Cu, and Zn in the Ti-rich lunar basalt 74275, in the lunar orange glass 74220, and in up to 10 lunar soils, namely, 14163, 15231, 64501, 66041, 68841, ...
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(1995)We report ion microprobe determinations of carbon, nitrogen, oxygen, magnesium-aluminum, and silicon isotopic compositions and trace element (H, N, O, Al, Si) concentrations of individual graphite grains (0.8-28 μm) from ...
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(2005)Large, correlated, mass-dependent enrichments in the heavier isotopes of O, Cr, Fe, and Ni are observed in type-I (metal/metal oxide) cosmic spherules collected from the deep sea. Limited intraparticle variability of oxygen ...
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(2000)Polycrystalline aggregates of bort-type diamond with inclusions of garnet and rutile from the Mir pipe have delta C-13 of -3.7 to -22.9 parts per thousand PDB. The bort of variety VIII (Yu.L. Orlov's classification) differs ...
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(2004)Cycling of redox-sensitive elements such as Fe is affected by not only ambient Eh-pH conditions, but also by a significant biomass that may derive energy through changes in redox state (e.g., Nealson 1983; Lovely et al. ...
Now showing items 7645-7664 of 39126