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Browsing ELibrary by Title
Now showing items 4578-4597 of 21821
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(2001)Dacitic to rhyolitic volcanic rocks of the Spruce Lake nappe experienced two phases of alkali-metasomatism as a result of fluids channelling along shear zones. The shear zones formed during a progressive, thrust-related ...
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(2004)Pliensbachian coaliferous sequences were formed along the southern margin of the Stavropol Uplift in various paleogeographic environments. Therefore, peat bogs are developed in various landscape zones. In the southern Kuban ...
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(2004)Possible participation of thermophilic Fe(III)-reducing microorganisms in the formation of Precambrian banded iron formations has been studied using the actualistic approach. The laboratory experiments suggest that the ...
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(2003)Gujba is a coarse-grained meteorite fall composed of 41 vol% large kamacite globules, 20 vol% large light-colored silicate globules with cryptocrystalline, barred pyroxene and barred olivine textures, 39 vol% dark-colored, ...
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(2003)Siderophile element abundances in individual metal grains in the ungrouped chondrite Grosvenor Mountains (GRO) 95551 and in the ordinary chondrites Tieschitz H3.6, Soko-Banja LL4, and Allegan H5 were measured with laser ...
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(2004)Siderophile element distributions within individual metal grains in two CH chondrites, Allan Hills 85085 and Pecora Escarpment 91467, were measured by laser ablation inductively coupled plasma mass spectrometry. Those metal ...
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(2003)Thermal decomposition of siderite has been proposed as a source of magnetite in martian meteorites. Laboratory experiments were conducted to evaluate the possibility that this process might also result in abiotic synthesis ...
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(2003)Stratiform (bedded) Paleozoic barite occurs as large conformable beds within organic- and chert-rich sediments; the beds lack major sulfide minerals and are the largest and most economically significant barite deposits in ...
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(2003)The formation of metabolites during anaerobic biodegradation of saturated hydrocarbons directly from crude oil in the absence of oxygen was investigated using a denitrifying bacterium, the Azoarcus-like strain HxN1, which ...
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(2004)The Ni–Cu–Platinum Group Element (PGE) sulfide deposits of the Sudbury Structure have provided a major portion of the world’s total nickel production and their host rocks have been the subject of numerous research studies, ...
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(2001)Approximately 56% of 60 known nested calderas are pairs of nonintersecting subcircular structures with similar eccentricities. The consistent configuration suggests an interdependence in the formation of the two annular ...
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(2000)Spectrophotometric measurements of Pd(II) in 0.5 M NaCl indicate that the PdCl3OH2- formation constant at 25°C is ClK*1 = [PdCl3OH2-][H+][Cl-][PdCl42-]-1 = 10-8.98. This constant is more than two orders of magnitude smaller ...
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(2002)Berman's (1983) activity-composition model for CaO-MgO-Al2O3-SiO2 liquids is used to calculate the change in bulk chemical and isotopic composition during simultaneous cooling, evaporation, and crystallization of droplets ...
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(2003)Ringwoodite, a compact modification of olivine (γ-olivine), was experimentally synthesized under static loads (within the interval 6-24 GPa, depending on the composition and the olivine-ringwoodite conversion temperature) ...
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(1990)In the study of the continental margins by marine seismic exploration methods, it has been established that the shelf and continental slope of many passive margins contain widespread evaporite associations and salt-diapir ...
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(2004)We have developed a coupled model for sill emplacement in sedimentary basins. The intruded sedimentary strata are approximated as an elastic material modelled using a discrete element method. A non-viscous fluid is used ...
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(2003)The interpretation of fault kinematics from geometric data is an essential step in developing an understanding of the growth of fault systems. Constraints on fault geometry are, however, often restricted to 2-D maps or ...
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(1998)Magnetite is a common product of bacterial iron reduction and may serve as a potential physical indicator of biological activity in geological settings. Here we report the formation of single-domain magnetite under laboratory ...
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(2001)Thermal decomposition of natural hydrotalcites HT and the role of hydrotalcite-like materials in the destruction of solid Ž. with a spinel-type structure, after grinding with solid phase Na CO additives, are investigated ...
Now showing items 4578-4597 of 21821