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Browsing Геология России by Title
Now showing items 2595-2614 of 39195
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(1994)This is a report on the nature of isotopically anomalous xenon, which has been detected in two Ca-Al-rich inclusions of the Allende carbonaceous chondrite. It is extremely enriched in 132Xe, 129Xe, and to a lesser extent ...
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(2003)This paper summarizes recent results obtained on chemical modifications of smectites. These include replacement of exchangeable cations with protons, a process connected with smectite autotransformation - attack of protons ...
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(1998)Ni, Co, Fe arsenic minerals are common accessory phases associated with both the Ni-Cu mineralization and country rock sulphides of the Pechenga complex. The majority of the arsenic minerals fall in the cobaltite-gersdorffite ...
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(2004)The objective of this study was to examine the mineralogy and geochemical stability of ochreous sediments accumulated in a compost wetland constructed in 1990 for acid mine drainage treatment. Intact sediment cores were ...
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(2005)Analyses of outcrops created by the impact craters Endurance, Fram and Eagle reveal the broad lateral continuity of chemical sediments at the Meridiani Planum exploration site on Mars. Approximately ten mineralogical ...
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(2004)The contents of elements in aerosols sampled during the First Chinese Arctic Research Expedition (CHINARE-1) show great differences from one element to another. Na, K, Ca, Mg, A1, F, and C1 are the major components in the ...
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CHEMISTRY OF GLASS INCLUSIONS IN OLIVINES OF THE CR CHONDRITES RENAZZO, ACFER 182, AND EL DJOUF 001 (2002)Glass inclusions in olivines of the Renazzo, El Djouf 001, and Acfer 182 CR-type chondrites are chemically divers and can be classified into Al-rich, Al-poor, and Na-rich types. The chemical properties of the glasses are ...
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(2003)The compositions of olivine grain boundaries have been analyzed with scanning transmission electron microscopy (STEM) via energy dispersive X-ray (EDX) spectrum profiling in three speci-mens: a peridotite ultramylonite, ...
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(1990)Kornerupine and associated minerals in 31 samples of high-grade rocks relatively rich in Al and Mg were analysed by wet chemistry, ion microprobe mass analyser, electron microprobe and X-ray powder diffraction. For 11 ...
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(2003)The morphology and chemistry of small grains (microlites and daughter phases in melt inclusions) of 20 minerals were examined in rocks from the Malomurunskii Massif. Along with minerals previously known in the massif, the ...
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(2004)Cold springs upwelling through large serpentinite mud volcanoes in the outer half of the Mariana forearc provide a unique window into processes of devolatilization of the subducting Pacific Plate. We have sampled upwelling ...
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(2003)The Calcalong Creek lunar meteorite is a polymict breccia that contains clasts of both highlands and mare affinity. Reported here is a compilation of major, minor, and trace element data for bulk, clast, and matrix samples ...
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(1990)One of the important unsolved problems regarding the serpentinization of Kimberlite is the mineragenetic and chemical direction of this process in its various stages. We analyzed this development on a series of specimens ...
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(2005)The formation of the Ries impact and the moldavites have identical radiogenic ages of 14.3 Ma. According to this conformity in age moldavites are generally regarded as products of the Ries impact. This paper, which is ...
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(2002)Current chemostratigraphical studies of the Jurassic System primarily involve the use of one sedimentary component (marine organic carbon), one divalent transition metal substituted in carbonate (manganese), and two isotopic ...
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(PANGAEA, 1993-01-24)
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(1998)A tephrochronological study and radiocarbon dating of soil-pyroclastic sequences were carried out along a profile of Shiveluch Volcano-Chernyi Yar-Bering Islands. Ashes deposited by the largest Shiveluch eruptions (for the ...
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(2004)The crystal structure of annealed chevkinite-(Ce), ideally (REE,Ca)4 Fe 2+ (Ti,Fe 3+ ,Nb)4 Si4 O22, monoclinic, C2/m, crystal (2 an ) a 13.400(1), b 5.7232(4), c 11.0573(9) A, � 100.537(2), V 833.7(2) A 3 and crystal (3 ...
Now showing items 2595-2614 of 39195