小坂および花岡鉱山黒鉱鉱床産鉱石の鉱物組成
1966 年 82 巻 944 号 p. 1008-1014
詳細
1966 年 82 巻 944 号 p. 1008-1014
Mineral compositions of ores from the Hanaoka and Kosaka mines are calculated from the bulk chemical analyses of “Kurokôo” (black ore), “Ôkô” (yellow ore), and “Keikô” (siliceous ore) which are the most typical are types of the so-called “Kurokô deposits”. The “Kurokô” is rich in sphalerite, galena and barite with minor tetrahedrite group mineral, chalcopyrite and pyrite.The “Ôkôo” is characterized by high concentration of pyrite and chalcopyrite and is rather poor in gangue minerals. The “Keiko” is highly siliceous ore with some chalcopyrite and pyrite. These natures in mineral composition of ores from the “Kurokô deposits” are compared with those of ores from Cu veins, Pb-Zn veins and cupriferous pyrite deposits. There is found very similar tendency both in mineral composition and in Cu-Pb-Zn ratios of the “Ku rokô” with ores of Pb-Zn veins, and the “Ôkô” and “Keikô” with ores of Cu veins and cupriferous pyritic deposits.
