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| Southeastern extension of the Red River fault zone (RRFZ) and its tectonic evolution significance in western South China Sea | |
| 基金项目： | 中国科学院知识创新工程项目;中国科学院基金;中国科学院基金;国家自然科学基金 |
| 摘 要： | The tectonic evolution features in the western South China Sea (SCS) are directly related to the Tethys tectonic province. The Red River fault zone (RRFZ) comprises a large part of the Tethys tectonic province and is the boundary between the Europe Block and the India-Asia Block1]. It serves as the contact between the uplift of the Qinghai-Tibet Plateau and the SCSopening. The RRFZ, which is an important dividing line in the geology of the SE Asia, is about 1000 km long in the co… |
| 收稿时间： | 19 October 2005 |
| 修稿时间： | 23 January 2006 |
Southeastern extension of the Red River fault zone (RRFZ) and its tectonic evolution significance in western South China Sea |
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| Authors: | LIU Baoming XIA Bin LI Xuxuan ZHANG Minqiang NIU Binhua ZHONG Lifeng JIN Qinghuan JI Shaocheng |
| Institution: | 1. Key Laboratory of Marginal Sea Geology and Resources, Chinese Academy of Sciences, Guangzhou 510640, China;China University of Geosciences (Beijing), Beijing 100083, China;Research Center of Science & Technology Department, CNOOC, Beijing 100027, China 2. Key Laboratory of Marginal Sea Geology and Resources, Chinese Academy of Sciences, Guangzhou 510640, China 3. Key Laboratory of Marginal Sea Geology and Resources, Chinese Academy of Sciences, Guangzhou 510640, China;Research Center of Science & Technology Department, CNOOC, Beijing 100027, China 4. China University of Geosciences (Beijing), Beijing 100083, China 5. Key Laboratory of Marginal Sea Geology and Resources, Chinese Academy of Sciences, Guangzhou 510640, China;Guangzhou Marine Geological Survey, Ministry of Land & Resources, Guangzhou 510075, China 6. Key Laboratory of Marginal Sea Geology and Resources, Chinese Academy of Sciences, Guangzhou 510640, China;Ecole Polytechnique Montreal, H3C3A7, Canada |
| Abstract: | Recent geophysical surveys and basin modeling suggest that the No. 1 fault in the Ying-gehai basin (YGHB) is the seaward elongation of the Red River fault zone (RRFZ) in the South China Sea (SCS). The RRFZ, which separates the South China and Indochina block, extends first along the Yuedong fault, offshore of Vietnam, and then continues southward and breaks off into two branches: the Lupar fault and the Tinjia fault. The southern extension of the Lupar fault dies out beneath the NW Borneo while the Tinjia fault extends southeast and reaches the Brunei-Sabah area. According to the gravity and geomagnetic data, and the tectonic evolution of the basins, there are different evolution histories between the Wan’an basin (WAB) and the basins in the Nansha block. The Tinjia fault may be the boundary between the Balingian block and the Nansha block. Hence, the line linking the Yuedong fault and the Tinjia fault, which both are continental margin faults and strike-slip ones in the geological evolution histories, constitute the boundary between the Indochina and Nansha block. The Lupar fault, in contrast, is an intraplate fault within the Indochina block. The results provide new hints for reconstructing the tectonic evolution history of the RRFZ and the opening of the SCS, and also a framework for hydrocarbon prospecting in the region. |
| Keywords: | Red River fault zone tectonic evolution fault extension western South China Sea |
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