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ELibrary: Recent submissions
Now showing items 41-60 of 22407
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(2006)По современным представлениям восточная граница Восточно-Европейской платформы проводится по зоне Главного Уральского разлома. На участке Среднего Урала платформа представлена Волго-Уральской антеклизой, крупной надпорядковой ...
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(2006)Геохимические исследования, проведённые ранее для карбонатитов Ильмено-Вишневогорского комплекса (ИВК), посвящены вопросам их редкометальной специфики, рудоносности, фациальной принадлежности, сопоставлению с платформенными ...
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(2006)Магнетит постоянно присутствует в измененных ультраосновных породах, прежде всего, в хризотиловых и антигоритовых серпентинитах, в виде рассеянной вкрапленности и является продуктом выноса железа из минералов исходных пород ...
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(2006)В настоящее время в западной литературе доминирует мнение, что формирование всего разнообразия альпинотипных ультрамафитов континентов и океанов есть результат не столько частичного плавления пиролита мантии, сколько ...
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VAPOR PRESSURES AND EVAPORATION COEFFICIENTS FOR MELTS OF FERROMAGNESIAN CHONDRULE-LIKE COMPOSITIONS (2006)To determine evaporation coefficients for the major gaseous species that evaporate from silicate melts, the Hertz-Knudsen equation was used to model the compositions of residues of chondrule analogs produced by evaporation ...
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(2006)To constrain seasonal changes in the long-range atmospheric transport of land-derived lipid biomarker compounds, we investigated the compound-specific stable isotopic composition of marine aerosol n-alkanes collected from ...
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(2006)Episodes of volcanic unrest do not always lead to an eruption. Many of the commonly monitored signals of volcanic unrest, including surface deformation and increased degassing, can reflect perturbations to a deeper magma ...
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(2006)The Rio Solimoes/Amazonas (Amazon River) and its major tributaries have been analyzed for U-series nuclides. 238U-234U -230Th-226Ra disequilibria have been measured in the dissolved (<0.2 ?m) and suspended loads (>0.2 ?m) ...
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(2006)Exploring the potentials of new methods in palaeothermometry is essential to improve our understanding of past climate change. Here, we present a refinement of the published ?44/40Ca- temperature calibration investigating ...
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(2006)A model Suwannee fulvic acid (SFA [Leenheer, J.A., 1994. In: Baker, L.A. (Ed.), Chemistry of Dissolved Organic Matter in Rivers, Lakes and Reservoirs. Advances in Chemistry Series, vol. 237. American Chemical Society]) was ...
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(2006)Compound-specific isotope analysis has become an important tool in environmental studies and is an especially powerful way to evaluate biodegradation of hydrocarbons. Here, carbon isotope ratios of light hydrocarbons were ...
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ALKENONE PALEOTHERMOMETRY: BIOLOGICAL LESSONS FROM MARINE SEDIMENT RECORDS OFF WESTERN SOUTH AMERICA (2006)An empirical global core-top calibration that relates the alkenone unsaturation index U37K? to mean annual SST (maSST) is statistically the same as that defined for a subarctic Pacific strain of Emiliania huxleyi (CCMP1742) ...
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(2006)Many studies have argued for the contribution of at least three components, namely the mantle wedge, the subducted oceanic crust, and its sediment cover, to describe the geochemistry of island arc volcanics. However, isotope ...
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(2006)To distinguish the buffering capacity associated with functional groups in the cell wall from that resulting from metabolic processes, base or acid consumption by live and dead cells of the Gram-negative bacterium Shewanella ...
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(2006)The fate of arsenic in groundwater depends largely on its interaction with mineral surfaces. We investigated the kinetics of As(III) oxidation by aquifer materials collected from the USGS research site at Cape Cod, MA, ...
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(2006)The Precambrian Egersund anorthosites exhibit a wide range of groundwater chemical composition (pH 5.40-9.93, Ca2+ 1.5-41 mg/L, Na+ 12.3-103 mg/L). They also exhibit an evolutionary trend, culminating in high pH, Na-rich, ...
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(2006)The solubility of molybdenum trioxide in liquid-undersaturated water vapour has been investigated experimentally at 300, 320, and 360 °C and 39-154 bars. Results of these experiments show that the solubility of MoO3 in ...
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(2006)Precise determination of the partitioning of Mg and Fe2+ between olivine and ultramafic melt has been made at pressures from 5 to 13 GPa using a MA-8 type multi-anvil high-pressure apparatus (PREM) installed at Earthquake ...
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(2006)The Mg/Ca ratio of seawater has varied significantly throughout the Phanerozoic Eon, primarily as a function of the rate of ocean crust production. Specimens of the crustose coralline alga Neogoniolithon sp. were grown in ...
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(2006)During fossilization, bone is thought to recrystallize and alter chemically on timescales of kyr to a few tens of kyr, i.e., similar to the timescale for formation of soils. Therefore, C- and O-isotope compositions of bone ...
Now showing items 41-60 of 22407