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Now showing items 10912-10931 of 43490
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(2003)Despite nearly forty years of modern research on silicate melt inclusions (MI), only within the past 10–15 years have volcanologists and petrologists come to regularly accept their utility for characterizing magmatic ...
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(2006)Melt inclusions in phenocrysts from Volcán Popocatépetl and Volcán de Colima within the Trans Mexican Volcanic Belt (TMVB) are dacitic to rhyolitic. Trends in melt inclusion major element and water concentrations form the ...
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(2001)The genesis of low-silica (generally olivine-anorthite) inclusions in volcanic rocks of the low-K tholeiitic island-arc series is a matter of active discussion. The study of melt inclusions in the major minerals of allivalites ...
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(2006)The study of scapolite-bearing eclogite-like rocks and granulites, experimental data, and finds of scapolite in igneous rocks showed that high-Ca scapolite can be of both metamorphic and magmatic origin under the high ...
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(2002)A technique is described for determining the cooling history of olivine phenocrysts. The technique is based on the analysis of the diffusive re-equilibration of melt inclusions trapped by olivine phenocrysts during ...
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(2000)Fluorine-, boron- and phosphorus-rich pegmatites of the Variscan Ehrenfriedersdorf complex crystallized over a temperature range from about 700 to 500 °C at a pressure of about 1 kbar. Pegmatite quartz crystals continuously ...
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(2004)Melt inclusions are small portions of liquid trapped by growing crystals during magma evolution. Recent studies of melt inclusions have revealed a large range of unusual major and trace element compositions in phenocrysts ...
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(2003)Silicate melt inclusions (MI) are small samples of melt that are trapped during crystal growth at magmatic pressures and temperatures. The MI represent a sample of the melt that was isolated from the bulk melt during host ...
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(2002)The loss of a metamorphic fluid via the partitioning of H2 O into silicate melt at higher metamorphic grade implies that, in the absence of open system behaviour of melt, the amount of H2 O contained within rocks remains ...
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(2003)We assess the potential for melt migration, separate from solid flow, to accommodate the transport of plume-signature material from off-axis mantle plumes to nearby mid-ocean ridges. We use a boundary-element method to ...
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(1998)We present a melt percolation model incorporating finite solid diffusion to provide a quantitative constraint on how melt migrates through the oceanic lower crust at fast-spreading ridge axes. The lower crustal, layered ...
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(1995)Data collected in ophiolite massifs indicate that some horizons with very high melt fractions have been frozen during the accretion of the harzburgites just below the crust. We show that the existence, distribution and ...
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(2004)The applicability of a speciation model to quantify the thermodynamic properties of silicate liquids was evaluated in the Na2O–SiO2 system. Based on spectroscopic data, four sodium-silicate species with various numbers of ...
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(2004)Relationships between mineral/silicate melt partition coefficients and melt structure have been examined by combining Ca and Mn olivine/melt partitioning data with available melt structure information. Compositions were ...
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(2006)The peridotite bodies of the Ulten Zone (Upper Austroalpine, Italian Eastern Alps) are enclosed in Variscan migmatites and derive from a mantle wedge environment. They display the progressive transformation of porphyroclastic ...
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(2006)The melt–solid dihedral angle has been measured in a range of igneous rock types, ranging in composition from picrite, through basalt, phonolite, andesite and rhyolite, for the minerals quartz, leucite, plagioclase, olivine, ...
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(2004)Conditions of melting in the crust are generally controlled by the availability of aqueous fluid and, in the absence of fluid, by the stability of hydroxylated minerals. To depths of 80–90 km, melting is controlled by ...
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(1997)The occurrence of clathrates (solid gas hydrates) in fluid inclusions severely complicates the use of microthermometry to estimate the composition and density of aqueo-carbonic fluids. Although models are available to ...
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(1994)Phase equilibrium data have been collected for isobarically univariant melting of simplified Iherzolite compositions in the system CaO-MgO-Al2O3 SiO2-Na2O over a pressure range of 7–35 kbar. These data permit the melting ...
Now showing items 10912-10931 of 43490