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Geophysical constraints on the lithospheric structure in the northeastern South China Sea and its implications for the South China Sea geodynamics

文献类型：期刊论文

作者Liu, Siqing1,7; Zhao, Minghui1; Sibuet, Jean-Claude1,2,3; Qiu, Xuelin1,7; Wu, Jonny4; Zhang, Jiazheng1; Chen, Chuanxu5; Xu, Ya6; Sun, Longtao1
刊名TECTONOPHYSICS
出版日期2018-09-13
卷号742页码:101-119
关键词Northeastern South China Sea Continent-ocean boundary (COB) Wide-angle reflection/refraction data Thinned continental crust intruded by post-rifting volcanism Taiwan transfer zone (TTZ)
ISSN号0040-1951
DOI10.1016/j.tecto.2018.06.002
英文摘要An E-W oriented OBS2015-2 wide-angle refraction profile was shot in the northeastern South China Sea (SCS) between previous refraction profiles T1 and T2 in order to better understand the variability of the crustal composition and the role of specific tectonic features. P-wave velocity models established from forward and inversion modeling imaged a 12 to 15 km-thick thinned continental crust and a high velocity layer (HVL) in the lower crust which is interpreted as magmatic underplating. Profile OBS2015-2 cut across the Taiwan transfer zone (TTZ), which separates two consecutive rifted segments of different orientations in the northeastern SCS. The TTZ is a well-defined upper crustal feature characterized by a HVL with different thickness on both sides. We have defined the southward limit of the thinned continental domain with the typical oceanic domain as a continent-ocean boundary (COB). The COB between the drilling area of IODP legs 367-368 to the Manila trench is characterized by a sharp contrast between the low amplitude, irregular shape magnetic anomalies and the high amplitude, elongated shape magnetic anomalies, which are associated with the thinned continental domain and the oceanic domain, respectively. We further extend the COB into the 400 to 500 km wide unfolded Manila slab located east of the Manila trench by using mid-slab dVp tomographic velocities to define the boundary between subducted oceanic and thinned continental crust. The location of the reconstructed northeast SCS COB appears to step northwards toward Taiwan across a 400 km N-S segment, providing new constraints on SCS geodynamics at the end of spreading and Taiwan pre-collisional configuration.
WOS关键词CRUSTAL STRUCTURE ; CONTINENTAL-MARGIN ; VELOCITY STRUCTURE ; EAST-ASIA ; TAIWAN ; TOMOGRAPHY ; REFRACTION ; TECTONICS ; MAGMATISM ; INVERSION
资助项目Chinese National Natural Science Foundation[91428204] ; Chinese National Natural Science Foundation[41674092] ; Chinese National Natural Science Foundation[41730532] ; Chinese National Natural Science Foundation[41676043] ; Chinese National Natural Science Foundation[41576070] ; Guangdong NSF[2017A030312002]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000445168100007
出版者ELSEVIER SCIENCE BV
资助机构Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; Guangdong NSF ; Guangdong NSF ; Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; Guangdong NSF ; Guangdong NSF ; Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; Guangdong NSF ; Guangdong NSF ; Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; Guangdong NSF ; Guangdong NSF
源URL[http://ir.iggcas.ac.cn/handle/132A11/88706]  
专题地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者Zhao, Minghui
作者单位1.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China
2.IFREMER, Ctr Brest, F-29280 Plouzane, France
3.44 Rue Cloitre, F-29280 Plouzane, France
4.Univ Houston, Dept Earth & Atmospher Sci, Sci & Res Bldg 1,3507 Cullen Blvd, Houston, TX 77204 USA
5.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China
6.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
7.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Siqing,Zhao, Minghui,Sibuet, Jean-Claude,et al. Geophysical constraints on the lithospheric structure in the northeastern South China Sea and its implications for the South China Sea geodynamics[J]. TECTONOPHYSICS,2018,742:101-119.
APA Liu, Siqing.,Zhao, Minghui.,Sibuet, Jean-Claude.,Qiu, Xuelin.,Wu, Jonny.,...&Sun, Longtao.(2018).Geophysical constraints on the lithospheric structure in the northeastern South China Sea and its implications for the South China Sea geodynamics.TECTONOPHYSICS,742,101-119.
MLA Liu, Siqing,et al."Geophysical constraints on the lithospheric structure in the northeastern South China Sea and its implications for the South China Sea geodynamics".TECTONOPHYSICS 742(2018):101-119.

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来源：地质与地球物理研究所

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