A coprecipitation experiment on the chalcopyrite disease texture involving Fe-bearing sphalerite.

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  • KOJIMA Shoji
    Institute of Mineralogy, Petrology and Economic Geology, Faculty of Science, Tohoku University
  • NAGASE Toshiro
    Institute of Mineralogy, Petrology and Economic Geology, Faculty of Science, Tohoku University
  • INOUE Toru
    Department of Earth Sciences, Faculty of Science, Ehime University

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Other Title
  • 含鉄閃亜鉛鉱を伴う黄銅鉱病変組織に関する同時沈殿実験
  • 含鉄閃亜鉛鉱を伴う黄銅鉱病変組織に関する同時沈殿実験〔英文〕
  • ガン テツ センアエンコウ オ トモナウ オウドウコウ ビョウヘン ソシキ ニ

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Abstract

Hydrothermal coprecipitation experiments were performed at 350 and 300°C, in order to reproduce the “chalcopyrite disease” texture involving Fe-bearing sphalerite. Sector-zoned chalcopyrite disease textures were obtained in some runs using a hydrothermal transporting method, and this shows that coprecipitation is responsible for formation of the texture in Fe-bearing sphalerite. These chalcopyrite disease textures with compositions similar to the run products occur in Fe-bearing sphalerite ores from the modern seafloor deposits at the Okinawa Trough and North Fiji Basin, suggesting a possibility that the chalcopyrite disease textures in the deposits were caused by the process of coprecipitation in short spans of time.

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