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Browsing ELibrary by Title
Now showing items 4500-4519 of 21821
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(2003)In order to elucidate at what pressure and temperature and for what fluid compositions monazite may be induced to form from fluorapatite, the LREE-enriched Durango fluorapatite has been experimentally metasomatized at ...
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(2002)We use published and new trace element data to identify element ratios which discriminate between arc magmas from the supra-subduction zone mantle wedge and those formed by direct melting of subducted crust (i.e. adakites). ...
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(1986)Solubilities of oxides in H2O and H2O-CO2 fluids in equilibrium with peridotites and with several single minerals have been determined at 15–20 kbar pressure and 600–1100°C.Solutes from H2O fluids are rich in normative ...
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(2004)The Southern Caspian Basin (SCB) is a unique region of the Earth where giant oil and oil–gas-condensate fields occur in association with oil–gas mud volcanoes. Practically all exploited hydrocarbon fields of this region are ...
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(2005)Time-resolved U(VI) laser fluorescence spectra (TRLFS) were recorded for a series of natural uranium-silicate minerals including boltwoodite, uranophane, soddyite, kasolite, sklodowskite, cuprosklodowskite, haiweeite, and ...
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(1997)According to their formation conditions, the fluorides are classified in two types - pneumatolytic and metasomatic. They are spatially confined to rootless fumaroles of basalt volcanoes. The main mineral among the fluorides ...
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(1989)The possibility of fluorimetric detection of oil seeps on the sea floor has often been raised since the late 1950's, because many natural hydrocarbons, including petroleum fractions, fluoresce brightly under UV illumination, ...
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(2003)It was found that F/Cl ratios of biotite and accessory apatite from mineralized porphyry complexes show a distinct correlation with the geochemical type of mineralization in the following deposits: Sora (Cu/Mo = 2-4), 37 ...
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(1998)The paper summarizes data on fluorine concentrations in magmatic silicate melts (833 analyses of fluorine and other major components from 69 publications). This data was obtained in studies of glasses from homogenous melt ...
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(1989)The study of metal content of birch sap at several ore deposits has shown that such sap contains anomalously high concentrations of metals. The sensitivity of modern analysis makes it possible to determine some ore indicator ...
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(2002)Anhydrous iron, aluminum and fluorine-rich paralavas were found in the burned spoil-heaps of the Chelyabinsk coal basin, Russia. The rocks contain tridymite, anorthite, ferroan fluorine-bearing cordierite, fluorine-bearing ...
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(2004)This study is devoted to accessory fluorite in granites of the Western Massif of the Khangilai pluton, eastern Transbaikalia. This mineral is widespread in Ta-Nb-bearing granites of the Orlovskoe ore deposit. Tantalum-bearing ...
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(2003)A huge fluorite deposit at Voznesenka in the Khanka massif, Far East Russia is concluded to have formed at ca. 450 Ma in Late Ordovician time based on the K-Ar ages for Li-micas in the fluorite ore and greisenized leucogranite ...
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(2001)The article discusses the formation and properties of fluorite in the Voznesensk and Pogranichnyi deposits (the Voznesensk ore district, Far East region, Russia). Evolution of the postmagmatic process was mainly influenced ...
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(2004)Recent experimental evidence is used to assess the conditions under which fluorite forms an early crystallising phase in silicic magmas. Fluorite solubility primarily depends on the (Na + K)/Al balance in the coexisting ...
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(2003)Fluorvesuvianite was found in the abandoned Lupikko iron mine, Pitkäranta, Karelia, Russia. It occurs in cavities of chloritized diopside skarn, as radiating aggregates of acicular crystals in calcite. Crystals (up to 1.5 ...
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(2004)A simple flux balance model with a diffusive, evaporative boundary layer indicates that the time constant (characteristic time) for approach to oxygen isotope steady state in the body fluid of land snails is ~19 min or ...
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FLUXES AND SOURCES OF VOLATILES DISCHARGED FROM KUDRYAVY, A SUBDUCTION ZONE VOLCANO, KURILE ISLANDS (1998)The Kudryavy volcano, a 996-m-high basaltic-andesite cone on the northeastern shore of Iturup Island in the Kuriles, erupted last in 1883 and has since been in a persistent state of high-temperature, >900°C fumarolic ...
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(2003)Recent discoveries define a global scale fluid reservoir residing within the uppermost igneous oceanic crust, a region of seafloor that is both warm and may harbor a substantial biosphere. This hydrothermal fluid reservoir ...
Now showing items 4500-4519 of 21821