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Browsing ELibrary by Title
Now showing items 11463-11482 of 21821
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(2003)The thermochemistry of well-characterized synthetic K-H3O, Na-H3O and K-Na-H3O jarosites was investigated. These phases are solid solutions that obey Vegard's law. Electron probe microanalyses indicated lower alkali and ...
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(2004)This work reports the synthesis of ferri-clinoholmquistite, nominally □Li2(Mg3Fe3+2)Si8O22(OH)2, at varying f O 2 conditions. Amphibole compositions were characterized by X-ray (powder and single-crystal) diffraction, ...
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(2002)End member boromuscovite, with nearly the ideal composition, was synthesized as a single phase from mixtures of its own composition, or with excess boron and water, at high pressures of between 15 and 30 kbar at 700 °C. ...
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(2000)Results of experimental investigations in the dry system PtS-PdS-NiS at 1100°C, 1000°C, and 900°C are presented. The phases observed at 1100°C are "cooperite" and a melt, at 1000°C "cooperite", "braggite", and a melt and ...
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(2000)Fe-Mg bearing chloritoids were synthesized at 18-35 kbar and 590-720 degrees C in a piston cylinder apparatus under the f(O2) defined by the Fe/FeO buffer (IW). We investigated the synthetic crystals by electron microprobe, ...
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(1996)Armalcolite and pseudobrookite have been crystallized from synthetic melts of basaltic composition with variable amounts of added TiO 2. It was found that the composition of the armalcolite and pseudobrookite are dependent ...
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(1999)Coeval silicate melt and aqueous synthetic fluid inclusions were formed at 800 degrees C and 2000 bars in the quartz-saturated haplo-granite-H2O-NaCl-KCl system. The equilibrium assemblage consisted of Ab(19.2)Or(31.1)Qtz(49.1) ...
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(2000)The nature and abundance of dislocations in quartz surrounding fluid inclusions were studied to obtain a better understanding of processes associated with fluid inclusion reequilibration. Synthetic fluid inclusions containing ...
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(1995)The location of the liquid + vapor -> liquid phase boundary and the P-T slopes of iso-Th lines were determined for a constant composition of 40 +/- 0.1 wt% NaCl and 5 +/- 0.15 mol% CO2 (both relative to H2O) at high density. ...
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(2000)The ternary system H2O-NaCl-CO2 is one of the most important fluid systems in geochemistry and petrology. However, there is little information on the phase equilibrium and PVT properties in this system at salinities above ...
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(1999)Seeded, solid-media piston-cylinder runs of unusually long duration up to 31 days indicate growth or persistence of synthetic gedrite of the composition □Mg6Al[AlSi7O22](OH)2(=6:1:7), prepared from the purest chemicals ...
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(1987)A brief description is given of the most popular textural varieties of jewelry-grade and ornamental malachite-banded, plush and nodular-produced using the authors method. Banded synthetic malachite visually resembles natural ...
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(2003)The equation of state and the structural behavior of synthetic MgAI2O4 have been investigated using synchrotron X-ray powder diffraction data collected to 30 GPa at room temperature. The Birch-Murnaghan, Vinet, and ...
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(2006)High-pressure (HP) metamorphic blocks enclosed in a mafic to ultramafic matrix from a melange on the island of Syros are rimmed by tourmaline-bearing reaction zones (blackwalls). The B isotopic composition of dravitic ...
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(2002)We examine a database containing the results of 40Ar/39Ar step-heating experiments performed on 194 basement K-feldspars to recover thermal history information. Qualitative examination of 40Ar/39Ar systematics reveals that ...
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(1997)To better understand the argon retention properties of basement K-feldspars, step-heating results for 115 specimens representing a wide range of temperature-time evolution from a diverse array of geologic environments have ...
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(1999)Based on the proposition that the Earth contains solar-like, nucleogenic and atmosphere-derived neon components, we calculate the amounts of solar-derived 22Nes and nucleogenic 21Ne∗ present in a sample. The amounts of ...
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(1996)Because most large-magnitude earthquakes along reverse faults have such irregular and complicated rupture patterns, reverse-fault segments defined on the basis of geometry alone may not be very useful for estimating sizes ...
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(2004)The depths to the tops of the zones of intermediate-depth seismicity beneath arc volcanoes are determined using the hypocentral locations of Engdahl et al. These depths are constant, to within a few kilometres, within ...
Now showing items 11463-11482 of 21821