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Browsing ELibrary by Title
Now showing items 4104-4123 of 21701
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(2000)The high-temperature (T = 1623 K) transformations of olivine single crystals in contact with graphite powder have been studied on time scales of hours to days by scanning electron microscopy, transmission electron microscopy, ...
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(1989)The content of the jadeite end member (Jd) in clinopyroxene (Cpx) in equilibrium with plagioclase (P1) and quartz (Qz) is defined by a reaction given in the paper, and is an efficient indicator of pressure for metamorphic ...
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EXPERIMENTAL STUDY OF CLINOPYROXENITE PARTIAL MELTING AND THE ORIGIN OF ULTRA-CALCIC MELT INCLUSIONS (2001)Ultra-calcic melt inclusions (UCMI: CaO>13.5 wt% and/or CaO/Al2O3>0.9) are magnesian and near-primary liquids trapped in volcanic phenocrysts from mid-ocean ridges, arcs, back-arcs, and ocean islands. UCMI can be subdivided ...
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(1987)As proved earlier, an aqueous fluid in equilibrium with mantle minerals at pressures above 10 kb has a relatively high alkalinity. The stability of hydrosulfide complexes of chalcophile elements in such a solution at ...
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(1998)The solubility of Cu phases was measured in vapor-saturated aqueous HCl/NaCl solutions at temperatures ranging from 40 to 300°C, total chloride concentration from 0.01 to 1 m, and pH from 0 to 3.5. For temperatures up to ...
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(1998)Diamond crystallization in carbonate-carbon systems was studied on a "split sphere" device BARS at P = 7 GPa and T = 1700-1750°C (experiment time 18.5 h). It has been established that the heterogeneous nucleation of diamond ...
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(2003)The genesis of diamonds from metamorphic complexes (Kokchetav in Kazakhstan and Dabie Shan in China) has been experimentally modeled. For the first time, diamonds were synthesized at pressures of 5.5-7.5 GPa in the molten ...
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(1997)New values of the dissociation constants of HCl° referring to low density supercritical solutions and near-critical temperatures of water (350-500°C and 500-2500 bars) have been obtained based on comparison of AgCl(s) ...
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(1997)New values of the dissociation constants of HCl° referring to low density supercritical solutions and near-critical temperatures of water (350–500°C and 500–2500 bars) have been obtained based on comparison of AgCl(s) ...
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(2004)Partitioning of Eu(III) in calcite, CaCO3, was evaluated with the aim of collecting data on partition coefficients and to enhance understanding of the incorporation mechanisms. This information will aid in the interpretation ...
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(2003)The behavior of Na and K during evaporation from chondrule composition melts was studied using a vacuum furnace. Though Na is the less volatile of the two as an element, it is lost more rapidly than K from silicate melts. ...
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(1986)Partitioning of Mg and Fe between coexisting biotite and orthopyroxene has been experimentally determined at temperatures 700, 750 and 800° C and 490 MPa total pressure in the system KAlO2-MgO-FeO-SiO2-H2O. Oxygen fugacity ...
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(2002)The exchange of Fe2+ and Mg2+ between orthopyroxene and sapphirine has been investigated at pressures 7-16 kbar and temperatures 850-1300°C using a piston cylinder apparatus for the synthetic and natural systems. This ...
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(1982)The Fe-Mg-Ca-distribution was investigated in synthesis experiments and with the mineral assemblage orthopyroxene+clinopyroxene+quartz. The phase compositions were identified by X-ray diffraction and, where possible, by ...
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(2004)The behavior and distribution of gold in shock-metamorphosed rocks were studied experimentally. A gold-bearing pyrite-quartz (Py-Qtz) mixture was affected by shock waves by the method of impulse-shock loading of powdered ...
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(1999)Humic acid adsorption onto bacterial and mineral surfaces was measured as a function of pH and humic:surface ratio. The bacterial species used was the aerobic gram-positive species Bacillus subtilis, and Al mineral surface ...
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(2003)Apatite dissolution experiments were conducted using both a fluidized bed and stirred tank reactor over a range of pH, temperature, solution saturation state, and on non-carbonated and carbonated apatite compositions: ...
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(2002)Variations in bulk Mg/Si ratios in the various groups of chondritic meteorites indicate that Mg/Si fractionation occurred in the primitive solar nebula. Enstatite (MgSiO3) evaporates incongruently forming forsterite (Mg2SiO4) ...
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(2001)Interaction between plagioclase amphibolite and synthetic glass of haplogranitic composition in the presence of aqueous fluid was studied experimentally at 800-950°C and 7 kbar. Amphibolite is replaced by granite with the ...
Now showing items 4104-4123 of 21701