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Геология России: Recent submissions
Now showing items 941-960 of 41109
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(2006)Spinel lherzolite and pyroxenite xenoliths from the Rio Puerco Volcanic Field, New Mexico, were analyzed for oxygen isotope ratios by laser fluorination. In lherzolites, olivine δ18O values are high (+5.5‰), whereas δ18O ...
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(2006)This study used 10 parallel, smallscale constructed wetlands to investigate the potential for methylmercury (MeHg) production and water quality improvement using water and sediment from a creek that is a significant source ...
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(2006)The low shear wave velocities Vs observed beneath spreading ridges and in the low velocity zone beneath plates are commonly attributed to the presence of melt. But geochemical observations suggest that the amount of melt ...
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(2006)Annually laminated sediments were recovered from Green Lake, a proglacial lake in the southern Coast Mountains in British Columbia, to examine their potential as a temperature proxy. Varve thickness is moderately correlated ...
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(2006)Amino acids are excellent biomarkers in the search for life on Mars because they are essential for biology as we know it and they are robust enough to survive for billions of years in the cold and dry Martian environment. ...
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(2006)In April 2001, a major atmospheric dustfall event occurred in the St. Elias Mountains, Yukon Territory, Canada. Field samples were collected and analyzed for particle size, mineralogy, chemical composition and Sr, Nd and ...
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(2006)This study examined the nitrogen (N) dynamics of a black spruce (Picea mariana (Mill.) BSP)-dominated chronosequence in Manitoba, Canada. The seven sites studied each contained separate well- and poorly drained stands, ...
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(2006)We report high precision Rb/Sr and Sr isotope analyses for the NBS SRM-607 standard feldspar, which is widely used as a reference material for Rb-Sr ratios as well as Sr isotope compositions. The Rb-Sr ratios of different ...
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(2006)We report structural, geochemical, and TIMS U-Th-Pb and U-series isotopic data for several samples of precious and common opal, which we tested as potential standards for ion microprobe and LA-ICPMS isotopic studies. The ...
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(2006)Zircon and baddeleyite U-Pb geochronological dating is widely used in solid Earth sciences and the advent of rapid in-situ methods of analysis, such SIMS and ICP-MS, has re-emphasized the importance of having uniform ...
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(2006)The phoscorite-carbonatite complex in the Sokli alkaline-carbonatite massif, northern Finland, comprises five stages of intrusions or phoscorites and carbonatites (P1-C1, P2-C2 and P3-C3 for phoscorites and calcite ...
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(2006)Desulfovibrio magneticus strain RS-1 is an anaerobic sulfate-reducing bacterium. Cells form intracellular nanocrystals of magnetite but are only weakly magnetotactic. In order to understand the unusual magnetic response ...
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(2006)Recent advances in U-Pb geochronology allow unprecedented levels of precision in the determination of geological ages. However, increased precision has also illuminated the importance of understanding subtle sources of ...
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(2006)The influence of the cooling rate on paleointensity estimates was investigated for samples from a vertical profile across a 600 A.D. obsidian lava flow ramp from Lipari, Italy. The natural cooling rates at the glass ...
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(2006)Alpine antigorite serpentinites associated with eclogites were investigated to determine if they can be used as indicators of the tectono-metamorphic conditions during subduction and exhumation processes. The detailed ...
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(2006)Laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) was used to determine major and trace element concentrations in rock varnish samples from the Lahontan Range, near Fallon, NV and from a remote wilderness ...
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(2006)Cryolite, Na3AlF6, is the most abundant aluminofluoride mineral in highly evolved felsic suites and their pegmatites, but its phase transitions and thermodynamic properties at elevated pressures are unknown. We used a ...
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(2006)We performed new experiments on incorporation of hydrogen in olivine at high pressures (2-12 GPa) and temperatures (1000-1300 °C). OH concentrations were calculated using the Bell et al. (2003) calibration applied to ...
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(2006)The Atlantic and Indian Oceans and the oceanic part of the Antarctic plate have formed at the expense of Panthalassa as a result of Pangea breakup over the last 180 Myr. This major plate reorganization has changed the age ...
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(2006)The molecular sources, dynamics and analytical characterizations of the phosphorus (P) containing components of marine dissolved and particulate organic matter (OM) are reviewed. Using a combination of 13C and 31P nuclear ...
Now showing items 941-960 of 41109