| LI Huaiming,ZHAI Shikui,TAO Chunhui,YU Zenghui,CHU Fengyou. 2010. Numerical simulation for fluids mixing within seafloor hydrothermal sulfide deposit: taking the Trans-Atlantic Geo-Traverse (TAG) field for example. Acta Oceanologica Sinica, (1):33－41 |
| Numerical simulation for fluids mixing within seafloor hydrothermal sulfide deposit: taking the Trans-Atlantic Geo-Traverse (TAG) field for example |
| Numerical simulation for fluids mixing within seafloor hydrothermal sulfide deposit: taking the Trans-Atlantic Geo-Traverse (TAG) field for example |
| Received:September 02, 2008 Revised:December 30, 2008 |
| DOI：10.1007/s13131-010-0005-3 |
| Key words:hydrothermal sulfide deposit mixing process TAG hydrothermal field numerical simulation |
| 中文关键词: hydrothermal sulfide deposit mixing process TAG hydrothermal field numerical simulation |
| 基金项目:China Ocean Mineral Resources Research and Development Association program under contract No. DY115-02-1-01; the National Basic Research Program of China ("973" Program) under contract No.G2000078503. |
| Author Name | Affiliation | E-mail | | LI Huaiming | Key Laboratory of Submarine Geosciences, State Oceanic Administration, Hangzhou 310012, China
College of Marine Geoscience, Ocean University of China, Qingdao 266100, China | huaiming_lee@163.com | | ZHAI Shikui | College of Marine Geoscience, Ocean University of China, Qingdao 266100, China | | | TAO Chunhui | Key Laboratory of Submarine Geosciences, State Oceanic Administration, Hangzhou 310012, China | | | YU Zenghui | College of Marine Geoscience, Ocean University of China, Qingdao 266100, China | | | CHU Fengyou | Key Laboratory of Submarine Geosciences, State Oceanic Administration, Hangzhou 310012, China
College of Marine Geoscience, Ocean University of China, Qingdao 266100, China | |
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| Abstract: |
| The formation mechanism of the large hydrothermal sulfide deposit is a complex geological process involving many controlling factors. Mixing between hydrothermal fluid and seawater plays a key role in this process. The results of the Ocean Drilling Program (ODP) indicate that mixing of the evolved seawater and hydrothermal fluid, which is wildly developed within the Trans-Atlantic GeoTraverse (TAG) hydrothermal deposit, governs the internal structure and chemical compositions of the deposit to great extent. Taking the TAG field for example, the mixing processes of hydrothermal fluid with the seawater heated to different extent are calculated, so as to discuss the impact of hydrothermal fluid/seawater mixing on the formation process of the sulfide deposit. The results indicate that:(1) mixing between the heated seawater and hydrothermal fluid derived from the deep deposit is largely responsible for the wild precipitation of anhydrite within the TAG hydrothermal deposit; (2) 330-310℃ is a special temperature range in the mixing process; (3) the mixing and hydrothermal processes in different zones of the TAG hydrothermal deposit (TAG-1, TAG-2 and TAG-5, etc.) have been discussed based on the simulated results. |
| 中文摘要: |
| The formation mechanism of the large hydrothermal sulfide deposit is a complex geological process involving many controlling factors. Mixing between hydrothermal fluid and seawater plays a key role in this process. The results of the Ocean Drilling Program (ODP) indicate that mixing of the evolved seawater and hydrothermal fluid, which is wildly developed within the Trans-Atlantic GeoTraverse (TAG) hydrothermal deposit, governs the internal structure and chemical compositions of the deposit to great extent. Taking the TAG field for example, the mixing processes of hydrothermal fluid with the seawater heated to different extent are calculated, so as to discuss the impact of hydrothermal fluid/seawater mixing on the formation process of the sulfide deposit. The results indicate that:(1) mixing between the heated seawater and hydrothermal fluid derived from the deep deposit is largely responsible for the wild precipitation of anhydrite within the TAG hydrothermal deposit; (2) 330-310℃ is a special temperature range in the mixing process; (3) the mixing and hydrothermal processes in different zones of the TAG hydrothermal deposit (TAG-1, TAG-2 and TAG-5, etc.) have been discussed based on the simulated results. |
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