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Browsing ELibrary by Title
Now showing items 5640-5659 of 26297
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(1998)Synchrotron micro-XANES spectroscopy (SmX) is used to examine the amount and distribution of Fe2+ and Fe3+ in five samples of fayalite previously studied by Mossbauer spectroscopy. Rockport fayalite is homogeneous and the ...
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FE3+/∑FE VS. FELα PEAK ENERGY FOR MINERALS AND GLASSES: RECENT ADVANCES WITH THE ELECTRON MICROPROBE (2001)This paper describes a preliminary study that attempts to determine the oxidation state of Fe (Fe3+/∑Fe) with the electron microprobe (EMP) by measuring the self-absorption induced shift of the FeLα peak emitted from ...
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(2002)Two suites of garnets were examined by infrared absorption spectroscopy and depolarized Raman spectroscopy to determine if the Raman signal could be used as a quantitative measurement of OH content. To avoid the problems ...
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(2003)Estimation of parameters of multiple fracture sets is often required for successful exploration and development of naturally fractured reservoirs. The goal of this paper is to determine the maximum number of fracture sets ...
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(2001)Some special characteristics of the deep structure and anomalies of the elastic properties of the crust of Eastern Crimea were established. The area studied was subdivided into three blocks, which were essentially different ...
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(2006)The Lloyds River Fault Zone is a 10-15 km wide amphibolite-grade shear zone that formed during the Ordovician Taconic Orogeny. It separates ophiolites and arc-back-arc complexes formed in lapetus from a periLaurentian ...
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(2006)While it is generally assumed that global plate motions are driven by the pattern of convection in the Earth's mantle, the details of that link remain obscure. Bouyancy forces associated with subduction of cool, dense ...
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FEELING THE COLD: ATMOSPHERIC CO2 ENRICHMENT AND THE FROST SENSITIVITY OF TERRESTRIAL PLANT FOLIAGE (2002)Quantitative palaeoclimate reconstructions from plant fossils using the nearest living relative (NLR) approach axiomatically assume that the climatic limits of plant distributions have largely remained unchanged over at ...
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(1995)Feldspar powders, An0-An76, were dissolved in flow-through reactors at 25°C, pH 3, to investigate the effect of feldspar composition, electrolyte concentration, and cation identity upon dissolution rates. BET surface area ...
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(1996)The steady-state dissolution rates of plagioclase feldspars into inorganic acid solutions in a flow-through reactor increased with Al content of the mineral from 1.4.10^-11 mol Si/m^2/s for albite to 5.6.10^-9 mol Si/m^2/s ...
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(2000)The saturation state of feldspar minerals in natural waters ranging from 0°C to over 300°C was studied. Waters above 200°C have closely approached equilibrium with microcline and low-albite. This is consistent with the ...
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(1996)Lherzolite xenoliths in Miocene to Pleistocene basalts from five sites in the Hamar-Daban range in southern Siberia provide sampling of the mantle close to the axis of the Baikal rift. These anhydrous spinel lherzolites ...
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(1999)Metasomatism is responsible for enrichment of lithospheric mantle in incompatible elements. The most common metasomatic products in mantle xenoliths and peridotite massifs worldwide are amphibole and mica providing mineral ...
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(2004)Polymict ureilites DaG 164/165, DaG 319, DaG 665, and EET 83309 are regolith breccias composed mainly of monomict ureilite-like material, but containing ∼2 vol% of feldspathic components. We characterized 171 feldspathic ...
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(2006)Low concentrations of Th and Fe in the Yamato (Y)-86032 bulk meteorite support earlier suggestions that Y-86032 comes from a region of the moon far distant from the Procellarum KREEP Terrain (PKT), probably from the lunar ...
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(2003)We present new compositional data for six feldspathic lunar meteorites, two from cold deserts (Yamato 791197 and 82192) and four from hot deserts (Dhofar 025, Northwest Africa 482, and Dar al Gani 262 and 400). The ...
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(2006)PCA (Pecora Escarpment) 02007 and Dhofar 489 are both meteorites from the feldspathic highlands of the Moon. PCA 02007 is a feldspathic breccia consisting of lithified regolith from the lunar surface. It has concentrations ...
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(2001)We describe a nearly complete mammalian femur from the Middle Jurassic (upper Bathonian) from Peski quarry, situated some 100 km south east of Moscow, central Russia. It is similar to the femora of Morganucodontidae in ...
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(1996)A suite of FeO-rich (type II), porphyritic, olivine/pyroxene (POP) chondrules has been studied in detail. Data for ten chondrules from Semarkona (LL3.0) are emphasized, and one chondrule from Chainpur (LL3.4) and two from ...
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(2003)We prove that rays in linearly elastic anisotropic nonuniform media obey Fermat's principle of stationary traveltime. First, we formulate the concept of rays, which emerges from the Hamilton equations. Then, we show that ...
Now showing items 5640-5659 of 26297