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Now showing items 7803-7822 of 38997
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(2004)The graphite-diamond transformation was investigated by in situ time-resolved X-ray diffraction experiments using aqueous fluid containing dissolved MgO as the diamond-forming catalyst under conditions of 6.6–8.9 GPa and ...
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(1988)
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(1997)Controlled cooling rate experiments of hydrous rhyolitic glasses have been carried out to examine the relation between the apparent equilibrium temperature of the quenched glass (or the final quenched speciation of molecular ...
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(2002)The rate of spinel (MgAl2O4) growth at the interface between MgO and Al2O3 was investigated systematically at temperatures of 1200° to ∼2000°C and pressures between 1.0 and 4.0 GPa with a solid-media, piston-cylinder ...
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(1990)We measured the kinetics of the transformation of kyanite to andalusite and sillimanite and of andalusite to sillimanite in order to determine the activation energies of the transformations and to estimate the absolute ...
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(2005)Little or no information is available in the literature about reaction processes of co-sorbing metals and arsenate [As(V)] on variable-charged surfaces or factors influencing these reactions. Arsenic and metal contamination ...
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(2001)The effects of different microbial populations on the oxidative dissolution of sulfide minerals at 37°C and pH 1.5 were examined over a period of 22 days. Samples of pyrite, marcasite, and arsenopyrite were exposed to a ...
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(2002)We derive Kirchhoff-approximate inversion formulae for elastic wavefields that recover the location of discontinuity surfaces and associated material property contrasts in laterally varying, stratified media. The derivation ...
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(1995)We studied the tectonic setting, morphology, geologic structure, history of eruptive activity and evolution of the composition of the erupted material of Kizimen volcano, Kamchatka, from the moment of its origination 11–12 ...
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(2012)Numerous ash layers deposited at the slopes of Kliuchevskoi volcano provide a detailed and continuous record of its explosive activity during the last ca. 10,000 years.
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(2004)Kokchetavite, a new polymorph of K-feldspar (KAlSi3O8), has been identified as micrometer-size inclusions in clinopyroxene and garnet in a garnet-pyroxene rock from the Kokchetav ultrahigh-pressure terrane, Kazakhstan. ...
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(2001)Сделана попытка количественно оценить химический состав и объемы мантии, активизация которой привела к формированию в палеозое в северо-восточной части Балтийского щита Кольской щелочной провинции. В отличие от известных ...
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(PANGAEA, 1977-09-21)
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(1985)Because of their high eruption temperatures and ultrabasic composition, komatiite lavas had low viscosities, which typically ranged from 0-1 to 10 Pa s. A major consequence of this low viscosity is that most lavas erupted ...
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(1986)When komatiite lavas are emplaced on the sea floor most of the heat transfer occurs through the upper lava-seawater boundary. We have investigated the cooling and crystallization of komatiites using a series of analogue ...
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(PANGAEA, 2011-01-12)Ground penetrating radar (GPR) and capacitive coupled resistivity (CCR) measurements were conducted in order to image subsurface structures in the Orkhon Valley, Central Mongolia. The data are extended by information from ...
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(PANGAEA, 2003-11-06)
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(1998)Kornerupine, (□,Fe,Mg)(Mg,Fe,Al)9(Si,Al,B)5 (O,OH,F)22, has been reported with talc in rocks from six localities worldwide, but only at Chilapila Hill in the Lufilian Arc, Zambia do textural relationships imply that ...
Now showing items 7803-7822 of 38997