- 责任者：Zheng Jianbin (College of Marine Geosciences ; Ocean University of China ; Qingdao 266100 ; China ) ; Cao Zhimin
- 刊名：Journal of China University of Geosciences
- 出版年：2007
- 卷期：18(2)
- 关键词：hydrothermal processes ; black smoker ; mineral assemblage ; exsolution texture ; ore fluid
- 页码：p.
- 图表：4 illus., 1 table, 31 refs.
- issnNo：ISSN1002-0705
- isbnNo：CN42-1279/P
To characterize the hydrothermal processes of East Pacific rise at 9o–10oN, sulfide mineral compositions, textural, and geochemical features of chimney ores were studied using ore microscope, scanning electron microscope, X-ray diffraction analysis, and electron microprobe techniques. Results show that there are three mineral assemblages for the hydrothermal chimney ores, namely: 1) anhydrite + marcasite + pyrite, 2) pyrite + sphalerite + chalcopyrite, and 3) chalcopyrite + bornite + digenite + covellite. Mineral assemblages, zonational features, and geochemical characteristics of the ore minerals indicate that ore fluid temperature changed from low to high then to low with a maximum temperature up to 400 ℃ . The chimney is a typical black smoker. The initial structure of the chimney was formed by the precipitation of anhydrites, and later the sulfides began to precipitate in the inner wall.