globalchange  > 气候变化与战略
DOI: 10.1016/j.tecto.2021.228912
论文题名:
Cenozoic structure and tectonics of North subbasins in Beibu Gulf Basin, northern South China Sea
作者: Liu Y.; Wu Z.; Liu L.; Yan S.; Hu L.; Ping M.; Zhang M.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2021
卷: 812
语种: 英语
中文关键词: 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
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170850
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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

Recommended Citation:
Liu Y.,Wu Z.,Liu L.,et al. Cenozoic structure and tectonics of North subbasins in Beibu Gulf Basin, northern South China Sea[J]. Tectonophysics,2021-01-01,812
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