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Browsing ELibrary by Title
Now showing items 4181-4200 of 21934
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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 ...
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(1999)Kyanite steady state dissolution rates were measured in mixed flow reactors as a function of aqueous aluminum and silica concentration at pH 1.6 to 2.2 and at temperatures from 108 to 194°C. Aqueous silica and aluminum ...
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(1998)The solubilities of pure synthetic La and Gd hydroxides were measured in aqueous solutions over a wide range of pH (5-9.5) and temperature (40-150°C). The regression of these data is used to determine the first dissociation ...
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(2001)Silicate-carbonate liquid immiscibility was experimentally studied with application to the modeling of carbonatite melt separation from foid silicate magmas. Main attention was paid to modeling silicate-carbonate liquid ...
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(2004)Evaluation of the effects of small repetitive earthquakes on the strength parameters of rock joints in active seismic zones is of interest of the designers of underground constructions. In order to evaluate these effects, ...
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(1998)The thermodynamic stabilities of the aqueous and surface Al-aniline and Al-2-chloroaniline complexes were investigated using solubility and adsorption experiments. Aqueous complexation was studied by measuring the solubility ...
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(1995)The following reactions have been reinvestigated in order to resolve conflicting evidence regarding tetrahedral AlSi disorder in muscovite, KAl2(AlSi3)O10(OH)2:muscovite + quartz = andalusite + sanidine + H2O ;muscovite = ...
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(2005)The subsurface mobility of Np is difficult to predict in part due to uncertainties associated with its sorption behavior in geologic systems. In this study, we measured Np adsorption onto a common gram-positive soil ...
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(1996)Melting temperatures of biotite-orthopyroxene-quartz assemblages were determined experimentally using biotites with various Fe-contents in the system KAlO2-MgO-FeO-SiCO2-H2O, in the pressure range 100-500 MPa and under the ...
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(1998)The solubility of sulfur in gaseous hydrogen sulfide has been studied in the H2S-S system. Experiments were carried out at temperatures between 50 and 290°C and pressures up to 200 bars. The experimentally determined ...
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(2004)The Earth's magnetic field is generated by motions in the liquid part of the Earth's core. These motions can be related to thermal or gravity convection and the precession of the Earth's axial rotation. At present seismology ...
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(2002)An experimental study of the CaMgSi2O6-Ca3Al2Si3O12-K2Mg(CO3)2, CaMgSi2O6-Mg3Al2Si3O12-K2Ca(CO3)2 and CaMgSi2O6-KAlSi2O6 joins of the carbonate-silicate system CaMgSi2O6-(Ca,Mg)3Al2Si3O 12-KAlSi2O6-K2(Ca,Mg)(CO3 )2 was ...
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(2002)In-situ observations of transmitted-light experiments of syntaxial vein growth during lateral fluid flow in a simulated fracture show a decrease in growth rate towards the downstream end. As a consequence, the fracture is ...
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(1998)The stability of aqueous complexes formed by Si and Ge with carboxylic acids (acetic, salicylic, oxalic, citric, tartaric) and phenols (phenol and catechol) has been investigated from 25 to 90°C via solubility and ...
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(2000)In order to examine the effects of Bacillus subtilis on rates and extents of gibbsite dissolution, we conducted batch-type dissolution experiments with viable, non-viable, and no bacteria. Dissolved Al and organic carbon ...
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(1997)New experimental data are presented for the Fe-Mg exchange between garnet and biotite in the temperature range 600-800 8C at 0.2 GPa. The Fe-Mg-Al mixing properties of biotite were evaluated and the garnet-biotite ...
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(1999)Kaolinite was hydrothermally precipitated starting from amorphous aluminosilicates, with Si/Al ratio from 1.8 to 0.76, at temperatures of 150, 175, 200, 225, and 250°C, at time periods varying from 6 h to 60 days. The ...
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(2003)Organic acids and acid anions occur in substantial concentrations in many aqueous geologic fluids and are thought to take part in a variety of geochemical processes ranging from the transport of metals in ore-forming fluids ...
Now showing items 4181-4200 of 21934