Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences
2013 Annual Meeting of Japan Association of Mineralogical Sciences
Session ID : R7-13
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R7: Petrology, Mineralogy and Economic geology (Joint session with SRG)
Ore minerals of Kuki mine, Onan district, Shimane Prefecture, Japan: Especially on silver-bearing minerals
*Keita HosokawaMasahide Akasaka
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Abstract
Ore minerals of Kuki mine, Onan district, Shimane Prefecture, Japan, were investigated to identify silver-bearing minerals and characterize mineralization. Kuki mine is a vein-type deposit occurring in quartz porphyry. Samples were collected from dump of Oyokodani-Mabu and Mizunuki-Mabu. Wall rocks are serisitized, chloritiized and silicified. Main ore minerals are pyrite, galena, sphalerite, chalcopyrite and arsenopyrite. Silver minerals with less than 1 micron occur around galena grains in pyrite, and those with less than 2 microns occur in fissures in sphalerite. Crystallization sequence is pyrite+arsenopyrite -> sphalerite -> galena -> chalcopyrite -> pyrite -> silver minerals.
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© 2013 Japan Association of Mineralogical Sciences
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