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Now showing items 13942-13961 of 43490
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(2006)The wide variety of metal sulfide structures and their accommodation of atomic substitution, non-stoichiometry and metal-metal (M-M) and ligand-ligand interactions allows for diverse physical, chemical and electronic ...
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(2002)Phase equilibria analysis has been performed to elucidate whether ore-bearing Noril'sk-and poorly mineralized Lower Talnakh-type intrusions are co-mag-matic with the extremely Ni-, Cu-and PGEs-depleted and not depleted ...
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(1990)Carbonate scapolite is a potentially powerful mineral for calculating CO2 activities in non-calcareous rocks, but an analysis of the thermodynamics and phase equilibria of carbonate scapolite is first necessary. This ...
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(2006)BIF with alkali amphibole at the Lebedinskoe iron deposits, the largest in Russia, were metamorphosed at 550°C and 2–3 kbar and contain ferriwinchite, riebeckite, actinolite, grunerite, and aegirine-augite. All reaction ...
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(2003)Fluids released from subducting slabs induce partial melting of the mantle wedge above the slab, which in turn is responsible for arc volcanism at the Earth’s surface. The partially hydrated basaltic layer of the slab is ...
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(1989)The mineralogy and geochemistry of titanium in rocks of the ultramafic-alkalic association are complex and varied. The reasons are, first, the high concentration of titanium in the primary magmas of this association, and, ...
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(1986)Experimental phase equilibrium data on compositions of coexisting pyroxenes in the quadrilateral enstatite-diopside-ferrosilite-hedenbergite have been used to model pyroxene solid solutions and to formulate pyroxene ...
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(1998)The evolution of nephelinitic melts in equilibrium with mica-bearing liquidus assemblages and melting relations have been studied on two silica-undersaturated joins of the KAlSiO4- Mg2SiO4- Ca2SiO4- SiO2- F system at ...
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(1987)Experimental data on phase relations in the CaCO 3 -MgCO 3 -FeCO 3 ternary by Goldsmith et al . (1962) are inconsistent with those of Rosenberg (1967). These inconsistencies cannot be reconciled by the pressure or temperature ...
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(1990)One of the most important problems in the physical chemistry of pyrometallugical processes involves the arsenic compounds that result from the processing of ores and concentrates and the optimum ways of separating and ...
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(1999)Detailed phase relations have been determined within the systems Fe2O3-MgO-TiO2 and FeO-MgO-TiO2. Experiments were performed over the temperature interval 1173-1473 K by equilibrating pelletized, fine-grained oxide mixtures ...
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PHASE EQUILIBRIA OF GLAUCOPHANE-AND KYANITE-BEARING ECLOGITES IN THE UHP BELT OF WESTERN DABIESHAN (2006)There still have been some disputable opinions on the UHP eclogites in western Dabieshan, especially regarding the stability of glaucophane- and kyanite-bearing assemblages in eclogites, their peak PT conditions and mineral ...
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(2006)The Proterozoic (950 Ma) Lyngdal granodiorite of southern Norway belongs to a series of hornblende-biotite metaluminous ferroan granitoids (HBG suite) coeval with the post-collisional Rogaland Anorthosite-Mangerite-Charnockite ...
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(2002)A new technique of temperature scaling method combined with the conventional Gibbs Ensemble Monte Carlo simulation was used to study liquid-vapor phase equilibria of the methane-ethane (CH4-C2H6) system. With this efficient ...
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(1999)Parameterizations of liquidus boundaries and solid solution in the CMAS + Fe system (Shi, 1992) have been employed to depict the liquidus equilibria relevant to the petrogenesis of angrites. Angrites are basaltic achondrites ...
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(1998)Experimental phase equilibrium studies at pressures ranging from 1 atm to 10 GPa are sufficient to constrain the origin of igneous rocks formed along oceanic ridges and in hotspots. The major element geochemistry of MORB ...
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(2002)Diamond crystallization and character of phase formation in thesystems K2CO3-C, K2CO3-SiO2-C, and K2CO3-Mg2SiO4-C were studied at 6.3 GPa, 1650 degreesC for 40 h using the multianvil split-sphere equipment. The SiO2/K2CO3 ...
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(1989)We thought that it would be interesting to consider how platinum-iron-sulfur phases behave at lower temperatures (300° to 600°C) in an oxygen-bearing system, i.e., in an environment that is more natural, judging by recent ...
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(2001)Knowledge of the mineralogical constituents of the Earth's mantle depends heavily on high-P experiments of pyrolite composition. In order to understand the planetary interior better, phase relations and mineral physics ...
Now showing items 13942-13961 of 43490