气候变化领域集成服务门户(CCPortal): Post-rift magmatism on the northern South China Sea margin

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DOI	10.1130/B35471.1
	Post-rift magmatism on the northern South China Sea margin
	Sun Q.; Alves T.M.; Zhao M.; Sibuet J.-C.; Calvès G.; Xie X.
发表日期	2020
ISSN	167606
起始页码	2382
结束页码	2396
卷号	132 期号:2021-11-12
英文摘要	Intense magmatism in the form of widespread volcanoes and lava flows is identified in high-resolution 3-D seismic data over a post-rift sequence of the northern South China Sea (SCS). Such a magmatism post-dates the end of seafloor spreading in the SCS by at least 6.8 m.y. A detachment (boundary) fault propagating into a deep-seated magma chamber provided the main vertical pathway for magma migration. In turn, normal faults and dykes constituted a shallow plumbing system through which the magma migrated from the boundary fault and was extruded onto the paleo-seafloor. Volcanism occurred in the study area from ca. 8.2 Ma to ca. 1.1 Ma in the form of two distinct events, dated ca. 5.2 Ma and ca. 2.8 Ma, which are correlated with the Dongsha Event. Extrusive magma formed volcano edifices and extensive lava flows; the latter of which were confined to the troughs of sediment waves or, instead, flowed along submarine canyons. As a corollary, this study shows that in the SCS: (1) young magmatism is widespread on the northern continental margin, (2) seafloor morphology greatly influences the architecture of deep-water volcanoes, and (3) syn-rift faults (especially detachment faults) reactivated by regional tectonics closely control the magma plumbing systems. © 2020 Geological Society of America. All Rights Reserved.
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184864
作者单位	Key Laboratory of Tectonics and Petroleum Resources, China University of Geosciences (Wuhan), Ministry of Education, Wuhan, 430074, China; Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266061, China; College of Marine Science and Technology, China University of Geosciences (Wuhan), Wuhan, 430074, China; Department of Earth Sciences, University of Oxford, Oxford, OX1 3AN, United Kingdom; 3D Seismic Lab, School of Earth and Ocean Sciences, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, United Kingdom; Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, 510301, China; Ifremer Centre de Brest, 44 rue du Cloitre, Plouzané, 29280, France; Université Toulouse 3-Paul Sabatier, OMP-GET, Toulouse, 31400, France
推荐引用方式 GB/T 7714	Sun Q.,Alves T.M.,Zhao M.,et al. Post-rift magmatism on the northern South China Sea margin[J],2020,132(2021-11-12).
APA	Sun Q.,Alves T.M.,Zhao M.,Sibuet J.-C.,Calvès G.,&Xie X..(2020).Post-rift magmatism on the northern South China Sea margin.Bulletin of the Geological Society of America,132(2021-11-12).
MLA	Sun Q.,et al."Post-rift magmatism on the northern South China Sea margin".Bulletin of the Geological Society of America 132.2021-11-12(2020).