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Browsing ELibrary by Title
Now showing items 6777-6796 of 21934
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(2004)Magmatic differentiation processes in a cooling magma body were examined using a numerical model considering multicomponent thermodynamics and momentum, energy and species transport. The model accounts for melt transport ...
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(2004)Epidote was first recognized as a magmatic mineral in the alpine Bergell tonalite by Cornelius (1915). Field observations and microscopic textures let Cornelius to conclude “... the only possibility is, that epidote is a ...
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(2004)We report compositions of homogenized quartz-hosted melt inclusions from a layered sequence of Li-, F-rich granites in the Khangilay complex that document the range of melt evolution from barren biotite granites to Ta-rich, ...
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(1998)Major and trace element data are presented from a suite of melilitite–carbonatite–nephelinite dykes, the youngest of three dykes swarms in the Turiy peninsula, Russia. The most primitive dykes consist of olivine melanephelinites ...
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(1999)Although incomplete because of the imperfect and somewhat random sampling of rock types by the Apollo and Luna missions (1969–1976), the history of lunar magmatism has been reconstructed by numerous researchers over the ...
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(1987)Thermometric study showed that fluorite begins to melt in inclusions at 740° to 780°C before dissolving completely at 840° to 890°C. Further heating led to solution of silicate crystals and the anorthoclase rim, to contraction ...
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(2003)Excesses of 182W have previously been measured in samples from the Moon and Mars, and can be derived from high Hf/W regions in their interiors during their early histories. Although planetary mantles will have superchondritic ...
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(1989)Igneous activity is a very accurate indicator linking the surface of the Earth to its crust and mantle. Features indicative of the general heterogeneity of the lithosphere include great magmatic 'seams', many thousands of ...
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(2003)Immiscible phase separation during the cooling and crystallisation of magmas is an inherently fugitive phenomenon and melt inclusions may provide the only remaining evidence of this process. We detail those features of ...
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(2001)Both Ni-Cu and PGE deposits are associated with mafic and ultramafic rocks, but the former often occur in dynamic magmatic systems such as lava channels and magma conduits whereas the later occur in larger layered intrusions. ...
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(2004)We report srilankite in a gabbroic vein cutting a serpentinized peridotite collected from the Atlantis II Fracture Zone, the slow-spreading Southwest Indian Ridge, using submersible SHINKAI 6500 of the Japanese Marine ...
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(2002)An SEM, REE, and mineral Sm-Nd isotope study on olivine-plagioclase coronas in the Vestre Dale gabbro, Norway, was carried out in order to solve the temporal relationships within these coronas. It is demonstrated that in ...
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(2003)The structure of the Caledonian area of the Central Asian fold belt is determined by Caledonian folded formations made up of Vendian-Cambrian ophiolite and island-arc complexes and by terrains or microcontinents of older ...
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(2003)The results of geochronological, geochemical, and isotopic investigations for magmatism and geodynamics of the Southern Baikal Volcanic region (mantle hot spot) are presented. The data presented suggest that the formation ...
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(1997)We have performed petrologic and geochemical studies on pyroxene-phyric, magnesian basalt clasts from the howardites EET 92014 and Kapoeta. Pyroxenes in the EET 92014 clast are strongly zoned from Wo4.5En68.9Fs26.6 cores ...
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(2004)Geological-structural, petrochemical, isotopic and geochronologic data on late-tectonic granitoid massifs and dikes cutting the metavolcanics of the Kostomuksha greenstone belt, western Karelia were discussed. The intrusions ...
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(1996)A significant mineral assemblage has been found as an inclusion in a natural diamond from the Finsch kimberlite pipe of South Africa: a euhedral rhombohedron-shaped magnesite (MgCO3) crystal (d ∼ 30 μm) co-exists with ...
Now showing items 6777-6796 of 21934