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Extensional styles of the conjugate rifted margins of the South China Sea
Song, Taoran1; Li, Chun-Feng2,3; Wu, Shiguo1,3; Yao, Yongjian4; Gao, Jinwei1
2019-06-15
Source PublicationJOURNAL OF ASIAN EARTH SCIENCES
ISSN1367-9120
Volume177Pages:117-128
AbstractTo elucidate continental rifting mechanism of the South China Sea (SCS), we characterize crustal structures of the two conjugate rifted margins and calibrate the continental-ocean transition zone (COT) with multi-channel reflection seismic, gravimetric and magnetic data. Narrower than those found in many other magma-poor margins, the COT in the SCS coincides well with a positive-negative gravity boundary, and shows Moho reflection gaps, basement highs and seaward normal faults. Post-rifting/spreading volcanic bodies and igneous intrusions often complicate the structures of the COT. Rifted basins here are often bounded by listric normal faults, the majority of which terminate at the upper-lower crust interface, i.e., the brittle-ductile transition boundary. This observation suggests that the lower crust was weak and played a dominant role in the continental breakup. We propose that the SCS lower crust acted as a decouple layer during extension, but the normal oceanic crust began to establish soon after crustal breakup. We also show how thermal regime affected the extent and timing of continental rifting of the SCS.
KeywordContinental-ocean transition zone Lower crust Rifting model South China Sea
DOI10.1016/j.jseaes.2019.03.008
Indexed BySCI ; SCI
Funding OrganizationHainan Provincial Natural Science Foundation of China ; National Natural Science Foundation of China
Language英语
Funding ProjectHainan Provincial Natural Science Foundation of China[417210] ; National Natural Science Foundation of China[41706046] ; National Natural Science Foundation of China[41761134051] ; National Natural Science Foundation of China[41576068] ; National Natural Science Foundation of China[91428309] ; National Natural Science Foundation of China[U1701245]
WOS KeywordCONTINENT-OCEAN TRANSITION ; CRUSTAL STRUCTURE ; MAGMA-POOR ; TECTONIC EVOLUTION ; BREAKUP ; ARCHITECTURE ; CONSTRAINTS ; TOMOGRAPHY ; VOLCANISM ; ASYMMETRY
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000471086300010
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.idsse.ac.cn/handle/183446/6804
Collection深海科学研究部_深海地球物理与资源研究室
Corresponding AuthorLi, Chun-Feng; Wu, Shiguo
Affiliation1.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Luhuitou Rd 28, Sanya 572000, Peoples R China
2.Zhejiang Univ, Dept Marine Sci, Zhoushan 316021, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266071, Shandong, Peoples R China
4.Guangzhou Marine Geol Survey, Guangzhou 510075, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Song, Taoran,Li, Chun-Feng,Wu, Shiguo,et al. Extensional styles of the conjugate rifted margins of the South China Sea[J]. JOURNAL OF ASIAN EARTH SCIENCES,2019,177:117-128.
APA Song, Taoran,Li, Chun-Feng,Wu, Shiguo,Yao, Yongjian,&Gao, Jinwei.(2019).Extensional styles of the conjugate rifted margins of the South China Sea.JOURNAL OF ASIAN EARTH SCIENCES,177,117-128.
MLA Song, Taoran,et al."Extensional styles of the conjugate rifted margins of the South China Sea".JOURNAL OF ASIAN EARTH SCIENCES 177(2019):117-128.
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