砒素鉱物資源の地質学

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タイトル別名
  • Geology of arsenic mineral resources
  • 資源情報 砒素鉱物資源の地質学
  • シゲン ジョウホウ ヒソ コウブツ シゲン ノ チシツガク

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抄録

Trace amounts of arsenic in igneous rocks are low in a deep-origin magma and high in crust-origin, ilmenite-series magmas. Magmas crystallized in high levels, shallow granitoids and volcanic rocks, are also high in the arsenic contents. In sedimentary rocks, arsenic contents are high in black shale. In ore deposits, arsenic is concentrated in some volcanogenic veins (e.g., Ashio), and Sn-W veins and skarns in the ilmenite-series granitic terranes (e.g., Sanyo Belt, SW Outer Zone). Among volcanogenic massive sulfides, arsenic is enriched in some Kuroko type but generally low in the Besshi type. Arsenic is most concentrated in Miocene vein type of the Ashio deposits, then Cretaceous vein type of Kanagatou and Koizumi deposits, located at the northern margin of the Sanyo Belt. Arsenic occurs as arsenopyrite and also as Cu-sulfosalts of mostly copper deposits, and therefore concentrated in copper concentrates. Arsenic is volatile metal, and therefore extracted from ash in the chimney of copper smelter.

収録刊行物

  • 資源地質

    資源地質 61 (2), 121-127, 2011

    資源地質学会

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