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Kinematic models for the opening of the South China Sea: An upwelling divergent flow origin

文献类型：期刊论文

作者Chen, Lin1; Hu, Jiwei2; Yang, Dinghui2; Song, Haibin3; Wang, Zhenhua1
刊名JOURNAL OF GEODYNAMICS
出版日期2017-06-01
卷号107页码:20-33
关键词Upwelling divergent flow Numerical modeling Continental margin Seafloor spreading Mantle exhumation South China Sea
ISSN号0264-3707
DOI10.1016/j.jog.2017.03.002
文献子类Article
英文摘要We investigate the kinematics of continent breakup and seafloor spreading in response to the upwelling divergent mantle flow using the optimal nearly-analytical discrete method, Modeling results show that a larger upwelling rate (V-z) in the upwelling divergent flow system favors the earlier development of continent breakup and seafloor spreading and the formation of narrow continental rifted margins and mantle exhumation; while a larger half divergent rate (V-z) favors the diffusive lithospheric thinning and the formation of wide continental rifted margins and mantle exhumation. The upwelling divergent flow-driven continent extension is strongly depth-dependent at the proximal margins, but it behaves approximately in a depth-uniform manner at the distal margins. Application of this model to the South China Sea (SCS) demonstrates that: (1) an upwelling flow operation with V-z = 0.3 cm/yr can explain the pre-spreading continent extension of the SCS between ca. 65 Ma and ca. 33 Ma; (2) the followed upwelling divergent flow with V-z = 2.5 cm/yr and V-z =0.3 cm/yr can reproduce the seafloor spreading history at ca. 33-16 Ma in the SCS central oceanic basin; and (3) the post-16 Ma thermal cooling since the cessation of the SCS seafloor spreading contributed similar to 1.2 km to the present-day bathymetry at the relict spreading ridge. The upwelling divergent flow with a high ratio of V-x/V-z was also likely responsible for the occurrence of the very wide rifted continental margins bounded the SCS. We suggest that an upwelling divergent mantle flow played a leading role in the opening of the SCS. (C) 2017 Elsevier Ltd. All rights reserved.
WOS关键词RIVER SHEAR ZONE ; VOLCANIC RIFTED MARGINS ; IODP EXPEDITION 349 ; CONTINENTAL-MARGIN ; CRUSTAL STRUCTURE ; MAGMA-POOR ; LITHOSPHERIC EXTENSION ; MAGNETIC-ANOMALIES ; TECTONIC EVOLUTION ; WESTERN PACIFIC
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000403135300002
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构National Natural Science Foundation of China(41230210 ; National Natural Science Foundation of China(41230210 ; National Key Research and Development Project(2016YFC0600406) ; National Key Research and Development Project(2016YFC0600406) ; 41474084) ; 41474084) ; National Natural Science Foundation of China(41230210 ; National Natural Science Foundation of China(41230210 ; National Key Research and Development Project(2016YFC0600406) ; National Key Research and Development Project(2016YFC0600406) ; 41474084) ; 41474084) ; National Natural Science Foundation of China(41230210 ; National Natural Science Foundation of China(41230210 ; National Key Research and Development Project(2016YFC0600406) ; National Key Research and Development Project(2016YFC0600406) ; 41474084) ; 41474084) ; National Natural Science Foundation of China(41230210 ; National Natural Science Foundation of China(41230210 ; National Key Research and Development Project(2016YFC0600406) ; National Key Research and Development Project(2016YFC0600406) ; 41474084) ; 41474084)
源URL[http://ir.iggcas.ac.cn/handle/132A11/46650]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Yang, Dinghui
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Tsinghua Univ, Dept Math Sci, Beijing 100084, Peoples R China
3.Tongji Univ, Sch Ocean & Earth Sci, State Key Lab Marine Geol, Shanghai 200092, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Lin,Hu, Jiwei,Yang, Dinghui,et al. Kinematic models for the opening of the South China Sea: An upwelling divergent flow origin[J]. JOURNAL OF GEODYNAMICS,2017,107:20-33.
APA Chen, Lin,Hu, Jiwei,Yang, Dinghui,Song, Haibin,&Wang, Zhenhua.(2017).Kinematic models for the opening of the South China Sea: An upwelling divergent flow origin.JOURNAL OF GEODYNAMICS,107,20-33.
MLA Chen, Lin,et al."Kinematic models for the opening of the South China Sea: An upwelling divergent flow origin".JOURNAL OF GEODYNAMICS 107(2017):20-33.

入库方式： OAI收割

来源：地质与地球物理研究所

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