Results 141 to 150 of about 3,322 (177)
Effects and differences of various concentration techniques on the evolution of therapeutic components in Lushan geothermal water. [PDF]
Sci RepZhang B +8 more
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Bioleaching of uranium from ores and rocks using filamentous fungi. [PDF]
Front MicrobiolBhatti TM, Tuovinen OH.
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Journal of Geochemical Exploration, 2019
Abstract The Li concentration of alkali feldspars, quartz, and muscovite from the spodumene-rich Main Sill of the Moblan pegmatite in Quebec, Canada, was used to evaluate the potential of the most common minerals in granitic pegmatites as indicators for the presence of Li-aluminosilicate mineralization. In Moblan, alkali feldspar crystals incorporate
Victoria Maneta
exaly +2 more sources
Abstract The Li concentration of alkali feldspars, quartz, and muscovite from the spodumene-rich Main Sill of the Moblan pegmatite in Quebec, Canada, was used to evaluate the potential of the most common minerals in granitic pegmatites as indicators for the presence of Li-aluminosilicate mineralization. In Moblan, alkali feldspar crystals incorporate
Victoria Maneta
exaly +2 more sources
Geochimica Et Cosmochimica Acta, 2014
Abstract This study presents a general model for the evaluation of Rayleigh fractional crystallisation as the principal differentiation mechanism in the formation of regionally zoned common and rare-element pegmatites. The magmatic evolution of these systems from a granitic source is reconstructed by means of alkali element and rare earth element ...
Niels Hulsbosch +2 more
exaly +2 more sources
Abstract This study presents a general model for the evaluation of Rayleigh fractional crystallisation as the principal differentiation mechanism in the formation of regionally zoned common and rare-element pegmatites. The magmatic evolution of these systems from a granitic source is reconstructed by means of alkali element and rare earth element ...
Niels Hulsbosch +2 more
exaly +2 more sources
Journal of the Geological Society of India, 1999
Abstract White coloured alkali beryl from the pegmatites of Mariagalla-Allapatna in Mandya district, Karnataka contains distinctly higher alkali elements (Na, Li, Rb, Ca) and relatively low beryllium oxide (c. 11 % BeO) compared to normal beryl. Beryl occurs mostly between graphic intermediate zone and quartz core in the complexly zoned,
Chanchal Sarbajna +5 more
exaly +2 more sources
Abstract White coloured alkali beryl from the pegmatites of Mariagalla-Allapatna in Mandya district, Karnataka contains distinctly higher alkali elements (Na, Li, Rb, Ca) and relatively low beryllium oxide (c. 11 % BeO) compared to normal beryl. Beryl occurs mostly between graphic intermediate zone and quartz core in the complexly zoned,
Chanchal Sarbajna +5 more
exaly +2 more sources
International Geology Review, 1965
The distribution of rubidium and cesium in microcline-perthite was studied in five topaz- and fluorite-bearing zoned pegmatites. Determinations of mineral paragenesis aided in the interpretation of the results of the rare alkali metal determinations. The study lead to the following conclusions: 1) The Rb content in zoned fluorite and topaz pegmatites ...
exaly +2 more sources
The distribution of rubidium and cesium in microcline-perthite was studied in five topaz- and fluorite-bearing zoned pegmatites. Determinations of mineral paragenesis aided in the interpretation of the results of the rare alkali metal determinations. The study lead to the following conclusions: 1) The Rb content in zoned fluorite and topaz pegmatites ...
exaly +2 more sources
Contributions To Mineralogy and Petrology, 1993
The ratios Na/Li, K/Li, Na/Cs and K/Cs have been calculated for exchange equilibria among the Li and Cs silicates spodumene, petalite, eucryptite, and pollucite, and the alkali feldspars albite and K-feldspar plus quartz, in pure water and in chloride solutions at temperatures from 100° to 700°C and pressures from 0.5 to 4 kbar, using available ...
Williams-Jones, A. E., Wood, S. A.
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The ratios Na/Li, K/Li, Na/Cs and K/Cs have been calculated for exchange equilibria among the Li and Cs silicates spodumene, petalite, eucryptite, and pollucite, and the alkali feldspars albite and K-feldspar plus quartz, in pure water and in chloride solutions at temperatures from 100° to 700°C and pressures from 0.5 to 4 kbar, using available ...
Williams-Jones, A. E., Wood, S. A.
exaly +2 more sources
Alkali-F-Rich Albite Zones in Evolved NYF Pegmatites: The Product of Melt–melt Immiscibility
Canadian Mineralogist, 2018Axel Müller +2 more
exaly +4 more sources