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Browsing Геология России by Title
Now showing items 5160-5179 of 39126
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(1995)A comprehensive experimental study, utilizing an autoclave hydrothermal apparatus with a 10B isotopic tracer, has been conducted to monitor the geochemical behavior of sediment B during early subduction zone processes. The ...
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(2004)Dissolution and precipitation rates of brucite (Mg(OH)2) were measured at 25°C in a mixed-flow reactor as a function of pH (2.5 to 12), ionic strength (10-4 to 3 M), saturation index (-12 < log Ω < 0.4) and aqueous magnesium ...
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(2004)We have experimentally studied the process of bubble coalescence in rhyolite and phonolite melts of natural composition. The experiments involved decompression of water-saturated melts equilibrated at pressures and ...
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(1996)An experimental investigation of metal-organic co-adsorption was conducted using cadmium and citrate in the presence of corundum. The experiments were performed in the pH range 3.0 to 10.0 in a 0.01 M NaCl matrix with ...
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(2000)Solid solutions of the barite-celestite series were synthesized under hydrothermal conditions. Lattice parameters were determined for the synthesized samples. Relationships between the composition and lattice parameters ...
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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 ...
Now showing items 5160-5179 of 39126