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ELibrary: Recent submissions
Now showing items 141-160 of 22407
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(2006)Primitive nephelinites and basanites from the Tertiary Hocheifel area of Germany (part of the Central European Volcanic Province; CEVP) have high Mg-number (>0·64), high Cr and Ni contents and strong light rare earth element ...
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(2006)The Granadilla eruption at 600?ka was one of the largest phonolitic explosive eruptions from the Las Canadas volcano on Tenerife, producing a classical plinian eruptive sequence of a widespread pumice fall deposit overlain ...
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(2006)The caldera-forming 26·5 ka Oruanui eruption (Taupo, New Zealand) erupted 530 km3 of magma, >99% rhyolitic, <1% mafic. The rhyolite varies from 71·8 to 76·7?wt % SiO2 and 76 to 112?ppm Rb but is dominantly 74–76?wt % SiO2. ...
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(2006)The genesis of the pegmatitic pyroxenite that often forms the base of the Merensky Unit in the Bushveld Complex is re-examined. Large (>1?cm) orthopyroxene grains contain tricuspidate inclusions of plagioclase, and chains ...
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(2006)Al2SiO5 reaction textures in aluminous schist and quartzite of the northern Picuris range, north-central New Mexico, record a paragenetic sequence of kyanite to sillimanite to andalusite, consistent with a clockwise P–T ...
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(2006)A localized dehydration zone, Sondrum stone quarry, Halmstad, SW Sweden, consists of a central, 1?m wide granitic pegmatoid dyke, on either side of which extends a 2·5–3?m wide dehydration zone (650–700°C; 800?MPa; ...
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(2006)The volcanic history of Santo Antao, NW Cape Verde Islands, includes the eruption of basanite–phonolite series magmas between 7·5 and 0·3?Ma and (melilite) nephelinite–phonolite series magmas from 0·7 to 0·1?Ma. The most ...
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(2006)Hydrogen is a major constituent in a wide variety of minerals in the Earth’s crust. Usually H is bonded to oxygen forming H 2 O molecules or OH − groups. In rare cases, H 3 O + , H 3 O 2− and H 5 O 2+ units are also formed. ...
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(2006)The Dexing adakitic porphyries (quartz diorite–granodiorite porphyries), associated with giant porphyry Cu deposits, are located in the interior of a continent (South China). They exhibit relatively high MgO, Cr, Ni and ...
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(2006)A composite intrusive igneous complex in the central mountain range of Queen Maud Land (Thor Range), Antarctica, displays characteristic features of anorogenic granites. A suite of massive intrusives and various sets of ...
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(2006)Kimberlite pipes or dykes tend to occur in clusters (a few kilometres in diameter) within fields ?30–50?km in diameter. They are generally considered to originate from low degrees of partial melting of carbonated peridotite ...
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(2006)Eclogite xenoliths from the Colorado Plateau, interpreted as fragments of the subducted Farallon plate, are used to constrain the trace element and Sr–Nd–Pb isotopic compositions of oceanic crust subducted into the upper ...
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(2006)A suite of mafic dykes from the Underberg region of southern KwaZulu-Natal (South Africa) were intruded at ?178?Ma, coincident in age with the major Okavango Dyke Swarm of Botswana, and also coincident with minor Karoo-related ...
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(2006)The volume %, distribution, texture and composition of coexisting olivine, Cr-spinel and glass has been determined in quenched lava samples from Hawaii, Iceland and mid-oceanic ridges. The volume ratio of olivine to spinel ...
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(2006)Anatectic veins containing the Be minerals khmaralite and beryllian sapphirine as primary phases (or surinamite derived therefrom) are associated with Mg–Al-rich paragneisses at three localities in the ultrahigh-temperature ...
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(2006)Site 1201D of Ocean Drilling Program Leg 195 recovered basaltic and volcaniclastic units from the West Philippine Basin that document the earliest history of the Izu–Bonin–Mariana convergent margin. The stratigraphic section ...
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(2006)The direct synthesis of zeolites in polluted soils has proved to be a promising process for the stabilization of metals inside these minerals. Nevertheless, more detailed information about this process is still needed in ...
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(2006)Different lithologies (impure marble, eclogite and granitic orthogneiss) sampled from a restricted area of the coesite-bearing Brossasco–Isasca Unit (Dora Maira Massif) have been investigated to examine the behaviour of ...
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(2006)In situ laser ablation inductively coupled plasma mass spectrometry analysis of trace elements, U–Pb ages and Hf isotopic compositions of magmatic zircon from I- and S-type granitoids from the Lachlan Fold Belt (Berridale ...
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(2006)We report the occurrence of unusual, high-magnesium (Fo96) olivine phenocrysts in a basaltic lava and an ejected lithic block from the Upper Vancori period (?13 ka) and the recent activity (2002–2003) of Stromboli volcano, ...
Now showing items 141-160 of 22407