Restructuring the formation conditions of black smoker chimney from L vent EPR 9&#176;～10&#176;N:constraints from mineralogy and lead-210 age

YAO Hui-qiang; ZHOU Huai-yang; PENG Xiao-tong; ZHOU Xin-mao; DONG Cong-fang; WU Zi-jun; LI Jiang-tao

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YAO Hui-qiang, ZHOU Huai-yang, PENG Xiao-tong, ZHOU Xin-mao, DONG Cong-fang, WU Zi-jun, LI Jiang-tao. Restructuring the formation conditions of black smoker chimney from L vent EPR 9°～10°N:constraints from mineralogy and lead-210 age[J]. Haiyang Xuebao, 2009, 31(5): 48-57.

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Restructuring the formation conditions of black smoker chimney from L vent EPR 9°～10°N:constraints from mineralogy and lead-210 age

1.
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640 China;State Key Laboratory of Marine Geology, Marine School, Tongji University, Shanghai 200092 China;Graduate School, Chinese Academy of Sciences, Beijing 100049, China
2.
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640 China;State Key Laboratory of Marine Geology, Marine School, Tongji University, Shanghai 200092 China
3.
Research Institute of Petroleum Exploration & Oevelopment, Beijing 100083, China

Received Date: 2009-02-22
Rev Recd Date: 2009-04-28

Abstract

Abstract

For restructuring the formation conditions of the black smoker chimney from L vent EPR 9°~10°N,mineralogy,the distribution of elements,and the ages of this chimney were studied with mineralogical,geochemical and radioactive chronological methods.Mineral observations show that the inner wall of this chimney is composed of cubanite,and the outer wall of the chimney is mainly composed of anhydrite.The results of lead-210 age show that the chimney forms after the 1991 EPR volcanic eruption events and has a slower growth rate,about 0.3 cm/a.Combining these results with the published data about A vent,nearby L vent,it is suggested that this chimney begins growth with a vapor phase fluid,and later is influenced by a brine phase fluid with temperature not less than 330℃.
- EPR 9°,
- ~10°,
- N,
- L vent:black smoker chimney,
- hydrothermal system,
- cubanite,
- lead-210 age,

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References(32)

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