IGGCAS OpenIR  > 油气资源研究院重点实验室
Crustal architecture and evolution of the southwestern South China Sea: Implications to continental breakup
Chang, Sung-Ping1; Pubellier, Manuel1; Delescluse, Matthias1; Qiu, Yan2; Nirrengarten, Michael3; Mohn, Geoffroy3; Chamot-Rooke, Nicolas1; Liang, Yao4
2022-02-01
Source PublicationMARINE AND PETROLEUM GEOLOGY
ISSN0264-8172
Volume136Pages:1-16
AbstractThe South China Sea (SCS) is a marginal basin characterized by propagating breakup and subsequent seafloor spreading during the Cenozoic. Our study investigates the crustal architecture and tectonic evolution of the Xisha Islands - Northwest Borneo conjugate margins using a 1000 km long seismic profile and two shorter seismic lines. This system is characterized by wide margins showing a succession of rift basins with thinned continental crust, associated with large extensional detachment faults soling on top of the lower crust. In relation with crustal extension, several syn-rift sequences have been identified. The lower syn-rift unit (syn-rift I) shows well expressed wedge-shape growth strata. The upper one (syn-rift II) presents a more uniform thickness, and is slightly offset by normal faults dipping toward the depocenters. To illustrate the evolution of the southwestern SCS margins during continental breakup, we restore two conjugate sections near the oceanic magnetic anomaly C5En (18.8 Ma). The conjugate COT presents an asymmetrical hyper-extension architecture in cross sections, with the southern margin being the lower plate margin. In map view, the spatial variation of crustal structures illustrates a bayonet shape characterized by an initial N-S extension coeval with the first phase of seafloor spreading in the east sub-basin in the SCS. The extension direction changed shortly later (circa 23Ma) to NW-SE opening in the southwest sub-basin in relation to a ridge jump. We suggest that variable extension direction is linked to changes in the compressional tectonic regime along Borneo and Palawan.
KeywordConjugate rifted margins South China Sea margin Breakup process
DOI10.1016/j.marpetgeo.2021.105450
WOS KeywordPOOR RIFTED MARGINS ; MAGMA-POOR ; NORTHERN MARGIN ; IBERIA-NEWFOUNDLAND ; DANGEROUS GROUNDS ; SEISMIC STRUCTURE ; EXTENSION ; TRANSITION ; CONSTRAINTS ; SUBBASIN
Language英语
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000748989200001
PublisherELSEVIER SCI LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/104028
Collection油气资源研究院重点实验室
Corresponding AuthorChang, Sung-Ping
Affiliation1.PSL Res Univ, Lab Geol, Ecole Normale Super, CNRS UMR 8538, Paris, France
2.Guangzhou Marine Geol Survey, Guangzhou, Peoples R China
3.CY Cergy Paris Univ, Dept Geosci & Environm, Cergy Pontoise, France
4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Chang, Sung-Ping,Pubellier, Manuel,Delescluse, Matthias,et al. Crustal architecture and evolution of the southwestern South China Sea: Implications to continental breakup[J]. MARINE AND PETROLEUM GEOLOGY,2022,136:1-16.
APA Chang, Sung-Ping.,Pubellier, Manuel.,Delescluse, Matthias.,Qiu, Yan.,Nirrengarten, Michael.,...&Liang, Yao.(2022).Crustal architecture and evolution of the southwestern South China Sea: Implications to continental breakup.MARINE AND PETROLEUM GEOLOGY,136,1-16.
MLA Chang, Sung-Ping,et al."Crustal architecture and evolution of the southwestern South China Sea: Implications to continental breakup".MARINE AND PETROLEUM GEOLOGY 136(2022):1-16.
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