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Browsing ELibrary by Title
Now showing items 4271-4290 of 22924
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(2001)Synthesis piston-cylinder experiments were carried out from 2.0 to 4.5 GPa and 850 to 1150°C in order to determine phase and melting relations in a model composition for subducted crust (K2O–CaO–MgO–Al2O3-SiO2–H2O). As ...
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EXPERIMENTAL CONSTRAINTS ON MAJOR AND TRACE ELEMENT PARTITIONING DURING PARTIAL MELTING OF ECLOGITE (2002)Isobaric partial melting experiments were performed on an Fe-free synthetic composition to simulate partial melting of subducted oceanic crust. Nominally anhydrous experiments at 3.0 GPa yielded melts in equilibrium with ...
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(1996)Our recent melting experiments on the major mantle and core materials at high pressure have shown that the very high melting temperatures in the lower mantle preclude models of deep magma oceans in the lower mantle unless ...
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(2002). Synthesis piston cylinder experiments were carried out in the range 2.0-4.5 GPa and 680-1,050 C to investigate phase relations in subducted continental crust. A model composition (KCMASH) has been used because all major ...
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(2000)A thorough understanding of fault seal processes is important in many practical and geological applications, which depend on subsurface flow of fluids. While the mechanisms involved in fault sealing are well known, the ...
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(2003)A series of hydrothermal experiments covering a range of temperatures from 175 to 260°C examined the decomposition of formic acid and formate and also investigated the production of formate from reduction of CO2. Decomposition ...
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(1997)Phase equilibria and dissolution rate experiments are used to develop a petrogenetic model for the high-Ti lunar ultramafic glasses. Near-liquidus phase relations of the Apollo 14 black glass, the most Ti-rich lunar ...
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(2003)We have performed partitioning experiments to assess the role of olivine in controlling the behavior of rhenium and the platinum group elements (PGEs) during basalt petrogenesis. Olivines were crystallized from an iron-bearing ...
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(2005)The anhydrous phase relations of an uncontaminated (primitive), ferropicrite lava from the base of the Early Cretaceous Paraná-Etendeka continental flood basalt province have been determined between 1 atm and 7 GPa. The ...
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(2006)This experimental study explores the petrogenesis of ureilites by a partial melting/smelting process. Experiments have been performed over temperature (1150-1280 °C), pressure (5-12.5 MPa), and low oxygen fugacity (graphite-CO ...
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(2003)Recent phase equilibrium studies, combined with analytical and petrological data, provide rigorous constraints on the pre-eruptive P-T-fH(2)O-fO(2)-fS(2)-fCO(2) conditions of silicic to mafic arc magmas. Pre-eruptive melts ...
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(2006)The near-liquidus crystallization of a high-K basalt (PST-9 golden pumice, 49·4 wt % SiO2, 1·85 wt % K2O, 7·96 wt % MgO) from the present-day activity of Stromboli (Aeolian Islands, Italy) has been experimentally investigated ...
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(2000)Experimental studies on replacement of Na by Cs and Sr in analcime-albite bearing buffered assemblages were carried out at 250-300 degrees C and P-sat = 39.7-85.8 bars in pure water and in chloride solution. This investigation ...
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(2001)Corundum, α-Al2O3, solubility was measured in 0.1 and 0.5 m NaCl solutions from 400 to 600°C between 0.5 and 2.0 kbar. The base-10 logarithm of Al molality at 2 kbar in 0.5 m NaCl increases from -2.45 at 400°C to -1.52 at ...
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(2002)Corundum (α-Al2O3) solubility was measured in 0.1-molal CaCl2 solutions from 400 to 600°C between 0.6 and 2.0 kbar. The Al molality at 2 kbar increases from 3.1 x 10-4 at 400°C to 12.7 x 10-4 at 600°C. At 1 kbar, the ...
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(1997)Corundum solubility was measured in H2O between 350° and 600°C from 0.5 to 2.2 kbar. The base-10 logarithm of molality of Al in equilibrium with corundum along the 0.5 kbar isobar decreases with increasing temperature from ...
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(1996)In order to more fully establish a basis for quantifying the role of amphibole in trace-element fractionation processes, we have measured pargasite/silicate melt partitioning of a variety of trace elements (Rb, Ba, Nb, Ta, ...
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EXPERIMENTAL DETERMINATION OF ACTIVITIES IN FETIO3-MNTIO3 ILMENITE SOLID SOLUTION BY REDOX REVERSALS (1997)Solid solutions of (Fe,Mn)TiO3 were synthesized, mostly at 0.10 XMn intervals, at 1 bar, 900°C and log f O2 = –17.50. Analysis by EMP indicate an ideal stoichiometry for the Fe-Mn ilmenites with (Fe+Mn) = Ti = 1.000 when ...
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(2003)The critical role of iron on crystal-silicate liquid relationships and melt differentiation is mainly controlled by the redox conditions prevailing in magmas, but the presently available database merely constrains the ...
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(1995)The solubility of the assemblage anorthite + andalusite + quartz and Ca speciation were investigated in supercritical chloride solutions between 400 and 600°C at 2 kb over a total chloride range of 0.005-5.6 m. Species ...
Now showing items 4271-4290 of 22924