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Browsing ELibrary by Title
Now showing items 9026-9045 of 21936
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(2003)Diffuse Cenozoic volcanism in Mongolia forms part of a widespread tectono-magmatic province that extends from NE China to Lake Baikal, Siberia. Mafic lavas from the Gobi Altai, southern Mongolia (33 Ma) and Hangai, central ...
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(2003)Mantle xenoliths from the Obnazhennaya kimberlite pipe, Yakutia, possess a large range of mineralogical and chemical compositions, from both group A and B eclogites. Major-element contents of the group A eclogites exhibit ...
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(2003)Ilmenite-bearing symplectite, typically ilmenite-clinopyroxene, occurs in rare mantle xenoliths from kimberlite and other alkaline rocks. Two major hypotheses have been proposed for their origin: (1) exolution from ...
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(2004)The petrogenesis of four lunar highlands meteorites, Dhofar 025 (Dho 025), Dhofar 081 (Dho 081), Dar al Gani 262 (DaG 262), and Dar al Gani 400 (DaG 400) were studied. For Dho 025, measured oxygen isotopic values and Fe-Mn ...
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(2003)Lunar meteorite EET 96008 is a fragmental breccia that predominantly consists of basaltic mineral clasts (0.5–2 mm), along with minor lithic fragments and breccia clasts. The matrix consists mainly of smaller mineral ...
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(2004)We performed hydrous partial melting experiments at shallow pressures (0.2 GPa) under slightly oxidizing conditions (NNO oxygen buffer) on oceanic cumulate gabbros drilled by ODP (Ocean Drilling Program) cruises to evaluate ...
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(2003)Martian meteorites Sayh al Uhaymir (SaU) 005 and lithology A of EETA79001 (EET-A) belong to a newly emerging group of olivine-phyric shergottites. Previous models for the origin of such shergottites have focused on mixing ...
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(2003)Primary magmas for the investigated SNC meteorites have been estimated on the basis of the bulk compositions of "basaltic shergottites" and melt inclusion data for other SNCs. All estimated compositions are similar in terms ...
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(1999)The Weekeroo Station IIE iron meteorite contains a variety of felsic and mafic inclusions enclosed in an FeNi-metal host. Petrographic, EMP, and SIMS data suggest that the petrogenesis of the silicates was complex, and ...
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(2002)Two syenite–granite suites, metaluminous and peralkaline, that form the Bryansky Complex in Transbaikalia, Russia, have been studied with the aim to constrain the existing models of A-type granitoid magma generation. The ...
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(2003)The Central pluton in the Lake Zone, western Mongolia, is a shallow-seated layered basic intrusion of the island-arc type. The pluton belongs to the Cambrian peridotite-pyroxenite-anorthosite- gabbronorite rock association, ...
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(2004)The association of granitoids and alkaline felsic rocks is widespread at the southern margin of the Aldan Shield. Interest in these rocks has been caused by the contrasting coexistence of sodic subalkaline (hereafter, ...
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(1997)Chromites forming giant orebodies in the souther part of the Early Palaeozoic ophiolite sequence of the the Kempirsai Massif (Kazakhstan, Urals) contain a large number of inclusions, i.e. silicates, sulphides, alloys, ...
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(2001)The Dajing Cu–Sn–Ag–Pb–Zn ore deposit, Inner Mongolia of China, is a fissure-filling hydrothermal ore deposit that occurs within the Upper Permian Linxi group. No magmatic pluton and volcanic rocks outcrop on the surface ...
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(1998)Felsic-volcanic hosted massive sulphide deposits form in many different geotectonic environments usually associated with episodes of extension. However, empirical geochemical links between felsic volcanism, geotectonic ...
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(2004)A semiquantitative petrogenetic grid in the system MgO-SiO2-H2O up to 30 GPa and 1600°C was constructed using Schreinemakers analysis on previous experimental data. The grid includes stability relations of hydrous wadsleyite, ...
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(1988)We studied metastable melting and subsequent syntexis in the Ichetuy volcanotectonic structure, located in southwestern Transbaikal on the left bank of the Dzhida River, USSR. Lower and Middle Jurassic volcanic rocks here ...
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(2003)Orthopyroxene-free garnet + clinopyroxene + plagioclase ± quartz-bearing mineral assemblages represent the paragenetic link between plagioclase-free eclogite facies metabasites and orthopyroxene-bearing granulite facies ...
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(1990)Combined geochemical studies have been carried out in one of the sectors of the Okhotsk-Chukotka volcanogenic belt (OCVB), within a large magmatogenic intrusivedome uplift that was formed in the late Cretaceous, at the ...
Now showing items 9026-9045 of 21936