气候变化领域集成服务门户(CCPortal): Cenozoic structure and tectonics of North subbasins in Beibu Gulf Basin, northern South China Sea

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DOI	10.1016/j.tecto.2021.228912
	Cenozoic structure and tectonics of North subbasins in Beibu Gulf Basin, northern South China Sea
	Liu Y.; Wu Z.; Liu L.; Yan S.; Hu L.; Ping M.; Zhang M.
发表日期	2021
ISSN	00401951
卷号	812
英文摘要	The spatial and temporal interaction of rifting at the northern South China Sea (SCS) margin and shearing along Red River Fault Zone (RRFZ) is crucial to understanding the regional geodynamics. Their obscure relationship has led to controversial models for the origin of the Beibu Gulf basin within the northeast edge of the SCS. Newly released seismic-reflection data and well logs permit a new comprehensive analysis of the tectono-sedimentary history, which provides important constraints on the basin-forming history. Based on the interpretation of 3D multi-channel seismic data, we analyzed the seismic stratigraphy, fault development and tectonic subsidence, with additional confirmation from analogue modelling. The results suggest that several key unconformities separate the rifting history of North subbasins into three distinct phases. The syn-depositional faults and depocenters experienced a tectonic transition from NE- to NNE-orientated during the first two stages. The extensional structures were overprinted by the conjugate strike-slip faulting during stage III (30–23 Ma), as evidenced by the NEE-trending predominant faults and reactivation of NW-trending blind faults. Together with other regional geologic records and plate reconstruction history, we propose an updated view of the region's tectonic history. The NE-trending rift system initiated at the beginning of the Cenozoic. Tectonic reconfiguration at ~40 Ma induced a regional change of stress field to become north-south stretching that caused a tectonic transition of the basin. Influenced by the regional shearing activity of the RRFZ as well as additional north-south stretching, the basin was reworked by widespread strike-slip deformation. We therefore emphasize that while the basin's overall architecture was defined by the development of NE-trending rifts, both reconfiguration of the stress field acting on pre-existing faults and strike-slip reactivation of blind faults led to the basin's current intricate structure. © 2021 Elsevier B.V.
关键词	Beibu Gulf basin NE-striking faults Northern South China Sea Rifting Strike-slip reactivation Tectonic transition
英文关键词	Geodynamics; Seismic waves; Seismology; Shearing; Stratigraphy; Stresses; Strike-slip faults; Structural geology; Well logging; Comprehensive analysis; Intricate structures; Multi-channel seismic datum; Northern South China Sea; Plate reconstruction; Seismic reflection data; Strike-slip deformation; Trending rift systems; Fault slips; Cenozoic; depocenter; geodynamics; rifting; seismic data; seismic reflection; seismic stratigraphy; tectonic evolution; tectonic setting; Gulf of Tonkin; Pacific Ocean; Red River Fault Zone; South China Sea; South China Sea; Trachinotus falcatus
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/208017
作者单位	Department of Geology, China University of Petroleum (East China), Qingdao, 266580, China; Department of Geology, University of Illinois at Urbana-Champaign, Urbana, IL 61820, United States; Shandong Provincial Key Laboratory of Deep Oil and Gas, Qingdao, 266580, China; Exploration and Development Institute, Zhanjiang Branch of CNOOC, Zhanjiang, 524057, China
推荐引用方式 GB/T 7714	Liu Y.,Wu Z.,Liu L.,et al. Cenozoic structure and tectonics of North subbasins in Beibu Gulf Basin, northern South China Sea[J],2021,812.
APA	Liu Y..,Wu Z..,Liu L..,Yan S..,Hu L..,...&Zhang M..(2021).Cenozoic structure and tectonics of North subbasins in Beibu Gulf Basin, northern South China Sea.Tectonophysics,812.
MLA	Liu Y.,et al."Cenozoic structure and tectonics of North subbasins in Beibu Gulf Basin, northern South China Sea".Tectonophysics 812(2021).