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The role of rifting in the development of the continental margins of the southwest subbasin, South China Sea: Insights from an OBS experiment
Lu, CC; Hao, TY; Lin, J; Qiu, XL; clu@mail.iggcas.ac.cn
2017
发表期刊MARINE GEOPHYSICAL RESEARCH
卷号38期号:1-2页码:105-123
摘要The continental margins of the southwest subbasin in the South China Sea mark a unique transition from multi-stages magma-poor continental rifting to seafloor spreading. We used reflection and refraction profiles across the margins to investigate the rifting process of the crust. Combining with the other seismic profiles acquired earlier, we focused on the comparative geological interpretation from the result of multichannel seismic analysis and wide-angle seismic tomography. Our result provides the evidence of upper crustal layer with abundant fractures below the acoustic basement with a P-wave velocity from 4.0 to 5.5 km s(-1). It indicates extensive deformation of the brittle crust during the continental rifting and can make a good explanation for the observed extension discrepancy in the rift margins of the South China Sea. The seismic chronostratigraphic result shows the possibility of the intra-continental extension center stayed focused for quite a long time in Eocene. Additionally, our evidence suggested that continental margin of the southwest subbasin had experienced at least three rifting stages and the existence of the rigid blocks is an appropriate explanation to the asymmetric rifting of the South China Sea.
部门归属[Lu, Chuanchuan; Hao, Tianyao] Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing, Peoples R China; [Lin, Jian] Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA; [Qiu, Xuelin] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou, Peoples R China
关键词South China Sea Southwest Subbasin Magma-poor Rifted Margins Hyper-extended Crust Wide-angle Reflection And Refraction
资助项目MSG
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/16501
专题中科院边缘海地质重点实验室
通讯作者clu@mail.iggcas.ac.cn
推荐引用方式
GB/T 7714
Lu, CC,Hao, TY,Lin, J,et al. The role of rifting in the development of the continental margins of the southwest subbasin, South China Sea: Insights from an OBS experiment[J]. MARINE GEOPHYSICAL RESEARCH,2017,38(1-2):105-123.
APA Lu, CC,Hao, TY,Lin, J,Qiu, XL,&clu@mail.iggcas.ac.cn.(2017).The role of rifting in the development of the continental margins of the southwest subbasin, South China Sea: Insights from an OBS experiment.MARINE GEOPHYSICAL RESEARCH,38(1-2),105-123.
MLA Lu, CC,et al."The role of rifting in the development of the continental margins of the southwest subbasin, South China Sea: Insights from an OBS experiment".MARINE GEOPHYSICAL RESEARCH 38.1-2(2017):105-123.
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