伊豆・小笠原弧水曜海山の海底熱水鉱床ボーリング
2000 年 50 巻 1 号 p. 35-43
詳細
2000 年 50 巻 1 号 p. 35-43
As a part of the deep sea mineral exploration program of the Metal Mining Agency of Japan (MMAJ), a twenty day drilling program was conducted around the Suiyou seamount in the Izu-Ogasawara Arc between December 8 and 27, 1999. The seamount is located about 240km northwest of Chichi Island and is characterized by the submarine hydrothermal polymetallic mineralization of back-arc basin type. Three of five drill holes intersected polymetallic mineralized parts enriched in Au, Ag, Cu, and Zn and characterized by pyrite, chalcopyrite and zincblende, making which is the first recovery of a modem hydrothermal deposit.
