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Now showing items 16499-16518 of 39124
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(2004)Deep seismic experiments on continental lithosphere generally reveal marked reflectivity from structures in the crust and a significant decrease in reflectivity from the upper mantle. However, reflected and refracted energy ...
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(2003)When numerical models are used for modeling large-scale flow and transport processes in the subsurface, upscaling is generally needed to determine large-scale hydraulic properties from small-scale measurements. This study ...
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(1999)The investigation of the Cu2+ uptake by the calcium carbonate minerals vaterite and calcite with continuous wave and pulse electron paramagnetic resonance (EPR) yields information on a molecular scale about the relevant ...
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(1999)The investigation of the Cu2+ uptake by the calcium carbonate minerals vaterite and calcite with continuous wave and pulse electron paramagnetic resonance (EPR) yields information on a molecular scale about the relevant ...
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UPTAKE OF DISSOLVED CD BY BIOGENIC AND ABIOGENIC ARAGONITE: A COMPARISON WITH SORPTION ONTO CALCITE (2003)The uptake of Cd2+ by aragonite and calcite is investigated by combining macroscopic measurements with some qualitative sorption experiments performed in a hydrogel medium. Both biogenic and abiogenic aragonites were studied ...
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(2003)Marine Fe-Mn oxyhydroxide crusts form by precipitation of dissolved components from seawater. Three hydrogenetic crust samples (one phosphatized) and two hydrothermal Mn-oxide samples were subjected to a sequential-leaching ...
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(2003)We substantiate theoretically the recognition of the Paleozoic-Early Mesozoic Ural-Paikhoi-Novaya Zemlya fold belt as Uralides not analogous to Hercynides (Variscides) and the preceding Late Vendian Timan folded structures ...
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(2004)Описан новый вид Uraloceras subsimense Kutygin sp. n. из эчийского горизонта пермской системы Верхоянья. Рассмотрены его филогенетические связи и историческое положение в развитии пермского сообщества аммоноидей региона.
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(PANGAEA, 1975-01-31)
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(2003)Magnetite is one of the most important end member of iron corrosion products under a reducing environment; therefore, it may be one of the first products interacting with radionuclides in a radioactive waste disposal after ...
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(IOP Publishing, 2015)The natural spa area "Choygan mineral waters", a unique deposit of natural carbon dioxide mineral waters in Siberia, is located in the Eastern Sayan Mountains. There are 33 spring discharges in this area. Spring waters are ...
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(1998)This paper presents new experimental data on the tracer diffusion rates of U and Th in diopside at 1 atm and 1150-1300°C. Diffusion couples were prepared by depositing a thin layer of U-Th oxide onto the polished surface ...
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(2002)We have developed techniques by sector-field inductively coupled plasma mass spectrometry (ICP-MS) for measuring the isotopic composition and concentration of uranium and thorium, focusing on the rare isotopes, 230Th and ...
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(2002)In oxidizing environments, the toxic and radioactive element uranium (U) is most soluble and mobile in the hexavalent oxidation state. Sorption of U(VI) on Fe-oxides minerals (such as hematite [α-Fe2O3] and goethite ...
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(2001)The paper presents the characteristics of the main uranium deposits of the El'kon ore district in the Aldan Shield, which is regarded as the primary reserve of uranium resources in Russia. The deposits are localized in ...
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URANIUM DISTRIBUTION IN ORE-BEARING ROCKS OF THE MALINOV DEPOSIT: EVIDENCE FROM FISSION RADIOGRAPHY (2004)Application of f-radiography for the study of ore-bearing rocks of the Malinov uranium deposit revealed the following specific features: (1) occurrence of uranium in both authigenic and terrigenous components; (2) important ...
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(Федеральное государственное бюджетное учреждение науки Геофизический центр Российской академии наук, 2018)To confirm the presence of geophysical anomaly the isotopic composition of uranium has been studied from the samples extracted from the exploration wells drilled in different years in the territory of the Zolotitskoye ore ...
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(1985)Uranium-series disequilibrium dating of island phosphate deposits is evaluated in terms of known associated coral ages, uranium geochemistry, and stratigraphic sequences as well as the concordance between the geochronometers ...
Now showing items 16499-16518 of 39124