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Browsing ELibrary by Title
Now showing items 6865-6884 of 21934
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(1983)Linear extensional rift and rift-like structures have been generated many times during various periods of the Earth's history since early times. These structures have varied with time, however, in scale, morphology, ...
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(2002)Current techniques for the quantification of melt inclusion chemistry require that inclusions are compositionally homogeneous and that post-entrapment devitrification or crystallization onto the inclusion walls could be ...
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(2002)Focuses on the importance of light sources in the discipline of mineral micromounting. Sufficiency of a typical high-intensity incandescent table lamp; Factors influencing the production of true color images; Use of a ...
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(2004)A monographic description of mollusks from the Lower Cambrian Bystraya Formation of Eastern Transbaikalia is presented for the first time. The mollusk assemblage includes ten species of nine genera; the following six species ...
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(2004)Maleevite, ideally Ba B-2 Si-2 O-8, and pekovite, ideally Sr B-2 Si-2 O-8, are two new mineral species found in boulders in the moraine of the Dara-i-Pioz glacier, the Alai range, Tien Shan, Garmskii district, northern ...
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(1996)Maleimides (1H-pyrrole-2,5-diones), degradation products of photosynthetic tetrapyrrole pigments, have been found for the first time in the polar fraction of the solvent extracts of two marine sediments deposited in ...
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(1987)The persistent occurrence of diverse forms of manganese crichtonite in kimberlite breccias of the Mir, the Aykhal, the No. 3 and the Dal'nyaya pipes, Yakutia has been proven. The coexisting forms of this mineral detected ...
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(2004)According to Mayo (1932), who provided a brief historical review of the names used for piemontite, the first researcher who described this mineral has been Cronstedt in 1758 who named it “rod Magnesia.” In 1790 Chevalier ...
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(1988)Metallogenesis of manganese in space and time is reviewed here in the light of the progressive development of the atmosphere, the hydrosphere and the lithosphere attendant with the varied styles of tectonism. Economic ...
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(1995)The spores of a marine Bacillus bacterium, strain SG-1, are able to oxidize Mn(II) over a wide range of temperatures (0-80°C) and Mn(II) concentrations (<1 nm to>25 mM), in both low ionic strength N-(2-hydroxyethyl)piper ...
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(1993)Hydrothermal vents provide a major source of dissolved Mn(II) to the oceans, where concentrations range from 5 mM within the 350°C hot smokers to just above ambient seawater concentration in far field vent plumes. The ...
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MANGANESE(III) BINDING TO A PYOVERDINE SIDEROPHORE PRODUCED BY A MANGANESE(II)-OXIDIZING BACTERIUM (2004)The possible roles of siderophores (high affinity chelators of iron(III)) in the biogeochemistry of manganese remain unknown. Here we investigate the interaction of Mn(III) with a pyoverdine-type siderophore (PVDMnB1) ...
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(2004)We present results of a study of the 53Mn-53Cr isotope systematics in the enstatite chondrites and achondrites (aubrites). The goal of this study was to explore the capabilities of this isotope system to obtain chronological ...
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(2004)U-Pb- and Ar-Ar-geochronologic data are presented, obtained for Posolnenskii and Nizhnekanskii massifs located in the central and south-western parts of Angaro-Kanskii block and breaking through the metamorphic rocks of ...
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(1994)Glasses from two EPR and two MAR basalts were crushed sequentially to release argon in a stepwise fashion. The results show a variation in ratios within each sample, indicating that the argon trapped in the vesicles has ...
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(2003)Mantle convection models require an initial condition some time in the past. Because this initial condition is unknown for Earth, we cannot infer the geological evolution of mantle flow from forward mantle convection ...
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(2002)Space and time variations in Pb, Sr, and Nd isotope ratios in Late Cenozoic alkali-basalt lavas from the vast East Sayan territory allowed an interpretation of the volcanism evolution in the context of interaction of a ...
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(2001)Because mantle viscosity is temperature-dependent, cold subducting lithosphere should be strong, which implies that the rapid, localized deformation associated with subduction should strongly resist plate motions. Due to ...
Now showing items 6865-6884 of 21934