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Browsing ELibrary by Title
Now showing items 9982-10001 of 21934
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(2003)Boron concentrations and isotope compositions of fluids and lavas from subduction-zone settings show great potential for elucidating mass flux at Earth's modern convergent margins. However, the fluid-mineral-melt behavior ...
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(2004)The record of both dinoflagellate cysts and benthic foraminifera across the Cretaceous-Tertiary boundary at El Kef, Tunisia, reveals a brief expansion of the Boreal bioprovince into the western Tethys, suggesting that an ...
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(1987)For zircons of metapelitic gneiss from the Zverev group in the Upper Larba River basin2, uranium-lead dating gave an age of 2.6 b.y. This important estimate is significant because the zircon sample was made up mainly of ...
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(2001)The presence of zircons of crustal origin in the dunites of Kytlym, a subduction-related concentrically zoned dunite–clinopyroxenite–gabbro massif of the Urals Platinum-Bearing Belt, may provide the first direct evidence ...
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(2001)The skeleton of the archosauriform Turfanosuchus dabanensis Young, 1973 is redescribed on the basis of further preparation. For the first time a set of derived features is recognised for diagnosing this species. Re-examination ...
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(2000)Isotopic characterisation of bromine could be a powerful tool for the determination of geological processes. However, no analytical procedures have been published to determine bromine stable isotope composition in natural ...
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(2001)The association of gold and Fe + S ± As phases in mesothermal gold deposits is ubiquitous. Arsenopyrite-löllingite-pyrrhotite-gold textures in amphibolite to granulite facies host rocks have been used to determine the ...
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(1987)The authors in a previous work showed that Fe-Pt alloys in ultramafic rocks are secondary, and proposed a fluid metasomatic model for their genesis, i.e., formation from primary solid solutions of Pt, Ir, Ru and Os via ...
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(2003)This paper reports on the extension of a hydrometeorological model of glacierized basins to incorporate a detailed account of glacier mass balance. In this mass balance module a constant fraction of snow fall is redistributed ...
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(2003)The transfer of fluid and elements from subducting crust to the overlying mantle wedge is a fundamental process affecting arc magmatism and the chemical differentiation of the Earth. While the production of fluid by breakdown ...
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(1990)The authors with alkali basalts of two different compositions, representing different degrees of differentiation, from the same basalt-rhyolite series of Iceland. The experiments were performed in an apparatus in which the ...
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(1992)We have investigated redox systematics in the upper mantle under continents and ocean islands, using data on olivine, orthopyroxene, and spinel from both spinel lherzolites and coexisting pyroxenite xenoliths. Calculated ...
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(2006)Olivine/melt partitioning of ?Fe, Fe2+, Mg2+, Ca2+, Mn2+, Co2+, and Ni2+ has been determined in the systems CaO-MgO-FeO-Fe2O3-SiO2 (FD) and CaO-MgO-FeO-Fe2O3-Al2 O3-SiO2 (FDA3) as a function of oxygen fugacity (fO2) at 0.1 ...
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(1990)The oxygen fugacity is one of the key factors governing mineral equilibria in the mantle. Of particular importance, it governs the composition of mantle fluids and thus their ability to dissolve minerals or to themselves ...
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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)The water column chemistry of lake St Eloy (St Eloy-les Mines, Allier, France) was monitored over a period of a year. This is a small stratified lake created by subsidence of an underground coal mine. The results show a ...
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(1996)Oil-rock-water reactions in hydrocarbon reservoirs were evaluated experimentally. Hematitic Tensleep Sandstone samples of 10-20 cm3 were heated with 200 ml of deionized water and 100 ml of petroleum for 3-14 days at ...
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(1998)P-T-fO2 conditions and fluid compositions were estimated from mineral paragenesis from inclusions in diamonds, diamond-bearing, and diamond-free xenoliths using garnet-orthopyroxene barometers and olivine-orthopyroxene-garnet ...
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(1998)P-T-fO2 conditions and fluid compositions were estimated from mineral paragenesis from inclusions in diamonds, diamond-bearing, and diamond-free xenoliths using garnet-orthopyroxene barometers and olivine-orthopyroxene-garnet ...
Now showing items 9982-10001 of 21934