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GeologyScience Repository: Recent submissions
Now showing items 3081-3100 of 40311
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(2005)В результате обобщения полученных в последние годы данных уточнена схема расчленения позднеордовикско-силурийских вулканических образований Тагильской зоны. Рассмотрены особенности вещественного состава пород выделенных ...
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(2005)The subsurface mobility of Np is difficult to predict in part due to uncertainties associated with its sorption behavior in geologic systems. In this study, we measured Np adsorption onto a common gram-positive soil ...
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(2005)We present a model of bacterial sulfate reduction that includes equations describing the fractionation relationship between the sulfur and the oxygen isotope composition of residual sulfate (δ34SSO4_residual, δ18OSO4_residual) ...
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REDOX POTENTIAL MEASUREMENTS AND MöSSBAUER SPECTROMETRY OF FEII ADSORBED ONTO FEIII (OXYHYDR)OXIDES (2005)The redox properties of FeII adsorbed onto a series of FeIII (oxyhydr)oxides (goethite, lepidocrocite, nano-sized ferric oxide hydrate (nano-FOH), and hydrous ferric oxide (HFO)) have been investigated by rest potential ...
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(2005)Closely-spaced transects measured by excimer laser ablation inductively-coupled plasma mass spectrometry (ELA-ICPMS) at 5 and 32 μm spatial resolution are used to generate trace element composition maps (Ba, Sr, Mg, U, Na, ...
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(2005)Much like reverse osmosis membranes, clays have been shown to exhibit reverse osmosis properties at high hydraulic heads. To determine if reverse osmosis was possible at lower hydraulic heads, potassium nitrate solutions ...
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(2005)The present study investigates the interaction between microbial growth and activity and the redox dynamics in natural porous media. The impact the transport regime has on this interaction is also addressed. Expressions ...
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(2005)New precise Te isotope data acquired by multiple collector inductively coupled plasma mass spectrometry (MC-ICPMS) are presented for selected extraterrestrial and terrestrial materials. Bulk samples of carbonaceous, ordinary ...
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(2005)Выполнено прецизионное геохимическое (ICP-MS) изучение ультрабазитов, габбро, гранитоидов и базальтоидов, находящихся в зоне Главного Уральского разлома на Приполярном Урале. Установлена принадлежность ультрабазитов ...
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(2005)This research tests the hypothesis that trace metals respond to the extent of reducing conditions in a predictable way. We describe pore water and sediment measurements of iron (Fe), manganese (Mn), vanadium (V), uranium ...
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(2005)The surface charge density of colloidal SiO2 (Aerosil 380) was measured in alkali chloride (0.067 and 0.20 M LiCl, NaCl, and KCl) and alkaline earth chloride (0.067 M MgCl2, CaCl2, SrCl2, BaCl2) solutions. Measurements ...
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(2005)Stepwise dissolutions of the carbonaceous chondrites Orgueil (CI), Murchison (CM) and Allende (CV) reveal large nucleosynthetic anomalies for Zr isotopes that contrast with the uniform compositions found in bulk meteorites. ...
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(2005)В данной статье приводятся многочисленные фактические данные по неотектонике, сеймичности (плановому распределению эпицентров землетрясений), напряженному состоянию (фокальным механизмам сильных землетрясений), активным ...
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(2005)The isotopic composition of dissolved Cu and solid Cu-rich minerals [δ65Cu (‰) = (65Cu/63Cusample/65Cu/63Custd) - 1)*1000] were monitored in batch oxidative dissolution experiments with and without Thiobacillus ferrooxidans. ...
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THERMODYNAMIC CONSTRAINTS ON THE FORMATION CONDITIONS OF WINONAITES AND SILICATE-BEARING IAB IRONS (2005)Silicate inclusions in IAB irons and related winonaite meteorites have textures, mineralogies and mineral chemistries that indicate a complex formation history of heating, followed by brecciation and metamorphism. Using ...
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(2005)Pb(II) sorption experiments with calcite powders were conducted in suspensions equilibrated at atmospheric PCO2(g) and ambient temperature at pH 7.3, 8.2 and 9.4. Pb fractional sorption was low at pH 7.3 and 9.4 relative ...
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(2005)Large, correlated, mass-dependent enrichments in the heavier isotopes of O, Cr, Fe, and Ni are observed in type-I (metal/metal oxide) cosmic spherules collected from the deep sea. Limited intraparticle variability of oxygen ...
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(2005)Dated sediment cores and porewaters from two Canadian Shield lakes, located 40 km from Québec City (L. Tantaré) and 25 km downwind from an important smelter in northwestern Québec (L. Vose), were analyzed for thallium and ...
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(2005)We investigated the influence of thermal maturity on the hydrogen isotope ratios of sedimentary hydrocarbons to prove that the isotope ratio of hydrocarbons mirrors paleoclimate signatures. δD values from n-alkanes and ...
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(2005)High-precision Zn isotopic variations are reported for carbonaceous chondrites (CC), equilibrated (EOC) and unequilibrated (UOC) ordinary chondrites, iron meteorites from the IAB-IIICD (nonmagmatic) and IIIA (magmatic) ...
Now showing items 3081-3100 of 40311