Distribution of Cenozoic igneous rocks and its relation to submarine geological hazards in the deepwater area of the northern South China Sea

Zhang Bingkun; Li Sanzhong; Xia Zhen; Ma Yun; Yu Shan; Wang Xiaofei

doi:10.3969/j.issn.0253-4193.2014.11.011

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Zhang Bingkun, Li Sanzhong, Xia Zhen, Ma Yun, Yu Shan, Wang Xiaofei. Distribution of Cenozoic igneous rocks and its relation to submarine geological hazards in the deepwater area of the northern South China Sea[J]. Haiyang Xuebao, 2014, 36(11): 90-100. doi: 10.3969/j.issn.0253-4193.2014.11.011

Citation:

Zhang Bingkun, Li Sanzhong, Xia Zhen, Ma Yun, Yu Shan, Wang Xiaofei. Distribution of Cenozoic igneous rocks and its relation to submarine geological hazards in the deepwater area of the northern South China Sea[J]. Haiyang Xuebao, 2014, 36(11): 90-100. doi: 10.3969/j.issn.0253-4193.2014.11.011

Citation:

Zhang Bingkun, Li Sanzhong, Xia Zhen, Ma Yun, Yu Shan, Wang Xiaofei. Distribution of Cenozoic igneous rocks and its relation to submarine geological hazards in the deepwater area of the northern South China Sea[J]. Haiyang Xuebao, 2014, 36(11): 90-100. doi: 10.3969/j.issn.0253-4193.2014.11.011

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Distribution of Cenozoic igneous rocks and its relation to submarine geological hazards in the deepwater area of the northern South China Sea

doi: 10.3969/j.issn.0253-4193.2014.11.011

1.
College of Marine Geosciences, Ocean University of China, Qingdao 266100, China;Key Lab of Submarine Geosciences and Exploration Techniques, Ministry of Education, Qingdao 266100, China
2.
Guangzhou Marine Geological Survey, Guangzhou 510075, China

Received Date: 2013-11-26

Abstract

Abstract

The previous studies mainly focused on the structure of the basin,structural style and evolution in the northern margin of the South China Sea. Cenzoic magmatism in this region is less known,especially for the deepwater area. Based on the analysis and interpretation of many 2D seismic profiles,the igneous rocks can be divided into three regions,including the Qiongdongnan-Xisha Region,the Shenhu Region,the Dongsha Region. The occurrences in different regions have distinct differences. The igneous rocks of the Qiongdongnan-Xisha Region have an obvious rule of distribution controlled by the dextral Right-step pull-apart basin. The igneous rocks of the Shenhu Region are mainly located in the intersection of the NE and NW faults. There is a high correlation between the extensional stress field caused by the Dongsha Movement and the igneous rocks in the Dongsha Region. As a form of manifestation of internal geodynamics,the magmatism plays an important role in re-moulding the submarine surface topography. There is also an obvious relation among the magmatism,active faults,submarine landslides and shallow gas.
- northern South China Sea,
- igneous rock,
- active fault,
- submarine landslide,
- shallow gas

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References(45)

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