ID | 13850 |
JaLCDOI | |
Sort Key | 1
|
タイトル(別表記) | 沖縄トラフ第四与那国海丘海底熱水系チムニーの錫を含む黄銅鉱と白金を含む輝蒼鉛鉱
|
フルテキストURL | |
著者 |
Gena, Kaul
Department of Earth Sciences, Faculty of Science, Okayama University
加瀬 克雄
Department of Earth Sciences, Faculty of Science, Okayama University
|
抄録 | The active sulfide chimney ore sampled from the flank of the active Tiger chimney in the Yonaguni Knoll IV hydrothermal system, South Okinawa Trough, consists of anhydrite, pyrite, shalerite, galena, chalcopyrite and bismuthinite. Electron microprobe analyses indicated that the chalcopyrite and bismuthinite contain up to 2.4 wt. % Sn and 1.7 wt. % Pt, respectively. The high Sn-bearing chalcopyrite and Pt-bearing bismuthinite are the first occurrence of such minerals on the submarine hydrothermal systems so far reported. The results confirm that the Sn enters the chalcopyrite as a solid solution towards stannite by the coupled substitution of Sn 4+ Fe 2+ for Fe 3+ Fe 3+ while Pt enters the bismuthinite structure as a solid solution during rapid growth. The homogenization temperature of the fluid inclusions in anhydrite (220-310℃) and metasured end-member temperature of the vent fluids (325℃) indicate that the minerals are precipitated as metastable phases at temperature around 300℃. The Sn-bearing chalcopyrite and Pt-bearing bismuthinite expess the original composition of the minerals deposited from a hydrothermal fluid with temperatures of about 300℃.
|
キーワード | Sn-bearing chalcopyrite
Pt-bearing bismuthinite
Active sulfide Chimmey
Yonaguni Knoll IV
Okinawa Trough
seafloor hydrothermal system
|
出版物タイトル |
Okayama University Earth Science Report
|
発行日 | 2005-12-31
|
巻 | 12巻
|
号 | 1号
|
出版者 | 岡山大学理学部地球科学教室
|
出版者(別表記) | Department of Earth Sciences Faculty of Science, Okayama University
|
開始ページ | 1
|
終了ページ | 5
|
ISSN | 1340-7414
|
NCID | AN10506284
|
資料タイプ |
紀要論文
|
OAI-PMH Set |
岡山大学
|
言語 |
英語
|
著作権者 | 岡山大学地球科学研究報告編集委員会
|
論文のバージョン | publisher
|
NAID | |
Eprints Journal Name | esr
|