大西洋中脊Logatchev热液区的地球物理场研究

唐勇; 和转; 吴招才; 黎明碧

大西洋中脊Logatchev热液区的地球物理场研究

1.
中国地质大学资源学院, 湖北武汉 430074;国家海洋局第二海洋研究所海底科学国家海洋局重点实验室, 浙江杭州 310012
2.
国家海洋局第三海洋研究所, 福建厦门 361005
3.
国家海洋局第二海洋研究所海底科学国家海洋局重点实验室, 浙江杭州 310012

基金项目: 国家"九七三"项目(2007CB411703);公益项目(200805078);基本科研业务费专项资金项目(JG1007)。

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出版历程
- 收稿日期: 2010-12-23
- 修回日期: 2011-04-13

The geophysical characteristics of hydrothermal plumes at the Logatchev vent field, Mid-Atlantic Ridge

1.
Naturd Resources School, China University of Geosciences, Wuhan 430074, China;Key Laboratory of Submarine Geosciences, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China
2.
The Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China
3.
Key Laboratory of Submarine Geosciences, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China

摘要

摘要: 利用"大洋一号"首次环球科考获得的地球物理资料,通过对多波束地形和地磁异常的解译,对大西洋Logatchev热液区的地球物理场特征进行了研究,研究结果表明 Logatchev热液喷口位于裂谷东侧的滑塌体上,处于南北地磁正负高值异常中心之间的缓冲带上,新发现的磁异常区与热液喷口区具有相似的特征,推测为未来的热液矿区。区内南西西-北东东和北-南向断裂不仅控制了基底深度和隆坳结构,也控制了超基性岩和热源磁性层的分布,因此它的形成与交叉切割的拆离断层、超基性岩、海洋核杂岩和重力滑塌有关。
- Logatchev热液区 /
- 磁异常 /
- 拆离断层 /
- 海洋核杂岩 /
- 重力滑塌
Abstract: Magnetic and multibeam data were collected from DAYANG No.1 first world cruise at Mid Atlantic Ridge.The interpretation of magnetic anomalies and bathymetric data shows the geophysical characteristics of hydrothermal plumes at the Logatchev vent field. Logatchev vent site is situated on the eastern inner flank of the rift valley and between the high value of positive and negative anomalies. NWW-SEE and NS trending fault not only control basement depth and upwelling-sag,but also dose the distribution of ultramafic rock and heat source. It is suggest that the Logatchev hydrothermal field is associated with ultramafic-hosted, off-axis location with detachment faulting, oceanic core complex, abundant gravitational landslides.
- Logatchev vent /
- magnetic anomalies /
- magnetosphere /
- oceanic core complex /
- gravitational landslides

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参考文献(18)

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