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Геология России: Recent submissions
Now showing items 2441-2460 of 43490
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(2006)Fractionation of Fe isotopes between a silicate melt and metallic alloys has been quantified experimentally at 1500 °C. The effects of oxygen fugacity and run duration have been investigated to distinguish between kinetic ...
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(2006)In this study we investigated the quantitative and qualitative aspects of soil organic matter (SOM) losses caused by water erosion within a small catchment in Northern Laos, under steep slopes and slash and burn agriculture. ...
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(2006)Burial of organic carbon (OC) in ocean sediments acts as the ultimate long-term sink for both terrestrial and marine carbon, however, the mechanisms controlling the preservation of this carbon are poorly understood. To ...
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(2006)The feasibility of in situ stable Fe isotope ratio measurements using UV-femtosecond laser ablation connected to a multiple-collector inductively coupled plasma mass spectrometer (MC-ICP-MS) has been investigated. Different ...
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(2006)Iron isotopes fractionate during hydrothermal processes. Therefore, the Fe isotope composition of ore-forming minerals characterizes either iron sources or fluid histories. The former potentially serves to distinguish ...
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(2006)Past changes in the seasonal distribution of insolation across the Earth's surface are thought to play a critical role in Quaternary climate cycles. In this study we use Sr/Ca and δ18O as geochemical proxies in the skeleton ...
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(2006)We have developed a method for iron isotope analysis by multiple-collector inductively coupled plasma mass spectrometry (MC-ICP-MS) using a 58Fe-54Fe double spike. A 20 min analysis produces mass-bias-corrected iron isotope ...
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(2006)Iron isotope compositions in marine pore fluids and sedimentary solid phases were measured at two sites along the California continental margin, where isotope compositions range from δ56Fe = -3.0‰ to +0.4‰. At one site ...
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(2006)In the Schwarzwald area, southwest Germany, more than 400 hydrothermal veins hosting different gangue and ore mineral assemblages cross-cut the crystalline basement rocks. Many of the post-Variscan fluorite-barite-quartz ...
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(2006)The stable copper isotope composition of 79 samples of primary and secondary copper minerals from hydrothermal veins in the Schwarzwald mining district, South Germany, shows a wide variation in δ65Cu ranging from -2.92 to ...
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(2006)Os equilibrium solubilities were determined at 1350 °C over a wide range of oxygen fugacities (-12 < log fO2 < -7) applying the mechanically assisted equilibration technique (MAE) at 105 Pa (= 1 bar). Os concentrations in ...
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(2006)Macroscopic sorption edges for Cu2+ were measured on hematite nanoparticles with average diameters of 7 nm, 25 nm, and 88 nm in 0.1 M NaNO3. The pH edges for the 7 nm hematite were shifted approximately 0.6 pH units lower ...
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(2006)Several designs proposed for high-level nuclear waste (HLW) repositories include steel waste canisters surrounded by montmorillonite clay. This work investigates montmorillonite stability in the presence of native Fe, ...
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(2006)A carbon and oxygen stable-isotope study was undertaken on samples from the uppermost Turonian-Santonian Aleg Formation and the Campanian-lowest Maastrichtian Abiod Formation from four wells in the Miskar Field (W1, W2, ...
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(2006)Freshwater Lake Ulubat (c. 1.5 m deep and c. 138 km2) receives sediment from a 10.414 km2 area in the seismically active Susurluk Drainage Basin (SDB) of NW Turkey. The B and trace element contents of the lake infill seem ...
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(2006)The exploration of deep-sea environments is currently at the dawn of a new era: underwater laboratories, permanently installed on the seafloor and offering power and on-line data transmission links to the shore, will allow ...
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(2006)In order to assess the geothermometric potential of the Na2 (Mn2-2xFe1+2x(PO4)3 system (x = 0-1), which represents the compositions of natural weakly oxidized alluaudites, we performed hydrothermal experiments between 400 ...
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(2006)Two high-resolution oxygen isotope records of speleothems from caves located in subtropical Brazil provide a broad view of regional climate variations and related forcing during the late Pleistocene and Holocene. Here, we ...
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(2006)Confocal micro-Raman spectroscopic measurements at high spatial resolution of about 5 μm3 were performed to determine the CO2 contents of natural cordierite. Nine cordierite single-crystals with known CO2 concentrations, ...
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(2006)Relationships between climatic factors and δ18O values of tree rings in two species with different root systems were investigated in the northern area in Hokkaido Island, northern Japan. This region has a heavy snow cover ...
Now showing items 2441-2460 of 43490