| Zeng Zhigang,Li Jun,Jiang Fuqing,Zhai Shikui,Qin Yunshan,Hou Zengqian. 2002. Sulfur isotopic composition of seafloor hydrothermal sediment from the Jade hydrothermal field in the central Okinawa Trough and its geological significance. Acta Oceanologica Sinica, (3):395－405 |
| Sulfur isotopic composition of seafloor hydrothermal sediment from the Jade hydrothermal field in the central Okinawa Trough and its geological significance |
| Sulfur isotopic composition of seafloor hydrothermal sediment from the Jade hydrothermal field in the central Okinawa Trough and its geological significance |
| Received:November 13, 2001 Revised:March 28, 2002 |
| DOI： |
| Key words:Sulfur isotopic composition seafloor hydrothermal sediment Jade hydrothermal field |
| 中文关键词: Sulfur isotopic composition seafloor hydrothermal sediment Jade hydrothermal field |
| 基金项目:This work was financially supported in part by the National Natural Science Foundation of China under contract No. 40176020; the National Major Fundamental Research; Development Project of China under contract No. G2000046703. |
| Author Name | Affiliation | | Zeng Zhigang | 1. Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
2. Chinese Academy of Geological Sciences, Beijing 100037, China | | Li Jun | 1. Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
2. Chinese Academy of Geological Sciences, Beijing 100037, China | | Jiang Fuqing | 1. Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
2. Chinese Academy of Geological Sciences, Beijing 100037, China | | Zhai Shikui | 1. Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
2. Chinese Academy of Geological Sciences, Beijing 100037, China | | Qin Yunshan | 1. Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
2. Chinese Academy of Geological Sciences, Beijing 100037, China | | Hou Zengqian | 1. Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
2. Chinese Academy of Geological Sciences, Beijing 100037, China |
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| Abstract: |
| Eighteen samples of hydrothermal sediments from the Jade hydrotherrnal field in the central Okinawa Trough have been analyzed. Sulfur isotopic values for 10 sulfide samples vary from 5.2×10-3to 7.2×10-3, δ34S values for 7 sulfate samples vary from 16.3×10-3 to 22.3×10-3, and 1 native sulphur sample has a δ34S value of 8.2×10-3. The major sources of sulfur for hydrothermal sediment are intermediate to acid volcanic rocks and sea water sulfate, and it is possible that the partial sulfur of hydrothermal sediment is from the pelagic sediment by the interaction between hydrothermal fluid and sediment. The reasons of causing the distinct differences in sulfur isotopic values for sulfide samples from hydrothermal sediment (compared with other hydrothermal fields), are the differences in the sources of sulfur, the magmatic activity and the tectonic evolution in different hydrothermal fields. The sulfur evolution is a long and complex process in the seafloor hydrothermal system, involving the ascending of heating sea water, the interaction between fluid and volcanic rocks, the mixing of sea water sulfate and sulfur from intermediate to acid volcanic rocks, and the fluid/pelagic-sediment interaction. And the interaction between sea water and intermediate to acid volcanic rocks is an important mechanism for the sulfur evolution in the Jade hydrothermal field. |
| 中文摘要: |
| Eighteen samples of hydrothermal sediments from the Jade hydrotherrnal field in the central Okinawa Trough have been analyzed. Sulfur isotopic values for 10 sulfide samples vary from 5.2×10-3to 7.2×10-3, δ34S values for 7 sulfate samples vary from 16.3×10-3 to 22.3×10-3, and 1 native sulphur sample has a δ34S value of 8.2×10-3. The major sources of sulfur for hydrothermal sediment are intermediate to acid volcanic rocks and sea water sulfate, and it is possible that the partial sulfur of hydrothermal sediment is from the pelagic sediment by the interaction between hydrothermal fluid and sediment. The reasons of causing the distinct differences in sulfur isotopic values for sulfide samples from hydrothermal sediment (compared with other hydrothermal fields), are the differences in the sources of sulfur, the magmatic activity and the tectonic evolution in different hydrothermal fields. The sulfur evolution is a long and complex process in the seafloor hydrothermal system, involving the ascending of heating sea water, the interaction between fluid and volcanic rocks, the mixing of sea water sulfate and sulfur from intermediate to acid volcanic rocks, and the fluid/pelagic-sediment interaction. And the interaction between sea water and intermediate to acid volcanic rocks is an important mechanism for the sulfur evolution in the Jade hydrothermal field. |
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