자원환경지질 (Economic and Environmental Geology)
- 제19권1호
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- Pages.57-66
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- 1986
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- 1225-7281(pISSN)
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- 2288-7962(eISSN)
일본(日本) 대곡광산산(大谷鑛山産) Pyrrhotite의 성질(性質)
Polymorphic Variations of Pyrrhotite as related to Tungsten-Tin-Copper Mineralization at the Ohtani Mine, Japan
초록
The ore deposit of the Ohtani mine is one of representatives of plutonic tungsten-tin veins related genetically to acidic magmatism of Late Cretaceous in the Inner zone of Southwest Japan. Based on macrostructures of vein filling, three major mineralization stages are distinguished by major tectonic breaks. The constituents of ore minerals are scheelite, cassiterite, chalcopyrite, pyrrhotite, sphalerite, with small amounts of cubanite, stannite, galena, native bismuth, bismuthinite, arsenopyrite and pyrite. The relationship between the polymorphic variations of pyrrhotite and the kinds of the associated characteristic of ore mineral, in relation with hypogene mineralization, has been demonstrated. Pyrrhotite of stage I is predominantly of the hexagonal phase (Hpo>Mpo). Pyrrhotite of stage II is mainly of the monoclinic phase (
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