东太平洋海隆9°~10°N热液烟囱体矿物成分、结构和形成条件

郑建斌; 曹志敏; 安伟

Volume 33 Issue 1

Jan. 2008

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ZHENG Jian-bin, CAO Zhi-min, AN Wei, 2008. Mineral Component, Texture and Forming Conditions of Hydrothermal Chimney on the East Pacific Rise 9°-10°N. Earth Science, 33(1): 19-25.

Citation:

ZHENG Jian-bin, CAO Zhi-min, AN Wei, 2008. Mineral Component, Texture and Forming Conditions of Hydrothermal Chimney on the East Pacific Rise 9°-10°N. Earth Science, 33(1): 19-25.

ZHENG Jian-bin, CAO Zhi-min, AN Wei, 2008. Mineral Component, Texture and Forming Conditions of Hydrothermal Chimney on the East Pacific Rise 9°-10°N. Earth Science, 33(1): 19-25.

Citation:

ZHENG Jian-bin, CAO Zhi-min, AN Wei, 2008. Mineral Component, Texture and Forming Conditions of Hydrothermal Chimney on the East Pacific Rise 9°-10°N. Earth Science, 33(1): 19-25.

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Mineral Component, Texture and Forming Conditions of Hydrothermal Chimney on the East Pacific Rise 9°-10°N

1.
College of Marine Geo-science, Ocean University of China, Qingdao 266100, China
2.
China Of fshore Environmental Service Ltd., Tianjing 300452, China

Received Date: 2007-01-28
Publish Date: 2008-02-25

Abstract

Abstract

To characterize the hydrothermal processes of East Pacific rise at 9°-10°N, 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.Resultsshow 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.
- hydrothermal processes,
- black smoker,
- mineral assemblage,
- exsolution texture,
- ore fluid

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References(37)

References

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Mineral Component, Texture and Forming Conditions of Hydrothermal Chimney on the East Pacific Rise 9°-10°N

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