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Browsing ELibrary by Title
Now showing items 4802-4821 of 17228
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(1996)The aqueous solubility of natural rhodochrosite (MnCO3) has been studied as a function of pH and total dissolved carbonate concentration, from 25 to 275°C and at saturation pressures. At 25 and 90oC the solubility measurements ...
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(1995)To obtain Cu-kaolinites with a controlled range of chemical compositions, syntheses were performed by hydrothermally ageing gels with kaolinite stoichiometric compositions. Gels were prepared with sodium metasilicate and ...
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(1994)This study presents further evidence that amino acids can be synthesized rapidly in hydrothermal solutions from reactants that may have been present in primitive environments. Aqueous NH 4 HCO 3 solutions were reacted with ...
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(1998)Synthetic gel and glass of illitic composition, natural kaolinite, and mixed-layer illitesmectite were used as starting materials for hydrothermal synthesis of ammonium illite. Ammonium illite was prepared from synthetic ...
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(2003)Hydrothermal experiments to synthesize pumpellyite group minerals of the pumpellyite-okhotskite series and to investigate their stability have been carried out at 200, 300 and 400 MPa Pfluid and 250-500 °C by using cold-seal ...
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(2001)To investigate the aqueous species important for transport of rhenium under subcritical conditions, we conducted a series of solubility experiments from 100 degrees to 200 degreesC at vapor saturation pressures. In these ...
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(1998)Compelling evidence now exists for the formation of Archean lode-gold deposits over a substantial range in metamorphic conditions and crustal depth. The commonality of ore-fluid isotopic and geochemical characteristics, ...
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(2002)An olivine grain from a peridotite nodule 9206 (Udachnaya kimberlite, Siberia) was investigated by TEM methods including AEM, HRTEM, SAED and EELS techniques. A previous study of the 9206 olivine sample revealed OH absorption ...
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(2003)The alteration products of cholesterol subjected to hydrothermal conditions have been analyzed by gas chromatography-mass spectrometry. Four sets of experiments were conducted at temperatures ranging between 150 and 300 ...
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(2000)The hydrous species geospeedometer is based on the homogeneous interconversion reaction between molecular H2O species and OH species in silicate melts and glasses. Here we report new data for the calibration of the ...
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(1996)The rate of goethite dissolution in the presence of acetohydroxamic acid, chosen to be representative of hydroxamate siderophores, was examined in order to understand the cycling of iron in soils. The surface chemistry is ...
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(1999)We test the hypothesis that a versatile strain of iron bacteria, Geobacter metallireducens, can metabolize Fe(III) when it is complexed to hydroxamate ligands. Pure cultures were grown under anaerobic conditions with, and ...
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(1998)A suite of more than 200 garnet single crystals, extracted from 150 xenoliths, covering the whole range of types of garnet parageneses in mantle xenoliths so far known from kimberlites of the Siberian platform and collected ...
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HYDROXYL IN CLINOPYROXENE FROM THE DEEP SUBDUCTED CRUST: EVIDENCE FOR H2O TRANSPORT INTO THE MANTLE (2003)Clinopyroxenes in eclogites from the deep subducted crust in the Kokchetav, Kazakhstan, ultra-high-pressure metamorphic terrane were found by infrared spectroscopy to contain up to 3020 ppm OH. These rocks were recrystallized ...
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(2004)From a total of 335 olivine crystal grains, crystallographically orientated platelets and, where possible, parallelepipeds were prepared, chemically analysed by electron microprobe, examined under the polarisation microscope, ...
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(2000)The November 12, 1964, eruption on Shiveluch Volcano is used as an example to describe a mathematical technique for modeling the precursory seismicity of similar events. The technique is efficient in revealing empirical ...
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(2001)A series of laboratory experiments has been conducted in order to elucidate the sediment-induced mixing processes accompanying riverine outflows; specifically, the discharge of a warm, fresh, particle-laden fluid over a ...
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(2003)We examine locations of hypocenters of large interplate earthquakes (M=<7.5) at subduction zones relative to their rupture areas to obtain a relation between the hypocentral depth and the seismic coupling coefficient, which ...
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(2003)A transient storage model is evaluated using results from a tracer experiment, where a conservative and a reactive tracer (3H and 51Cr(III)) were injected simultaneously and monitored in stream water and bed sediment. About ...
Now showing items 4802-4821 of 17228