Prolonged post-rift magmatism on highly extended crust of divergent continental margins (Baiyun Sag, South China Sea)

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	Prolonged post-rift magmatism on highly extended crust of divergent continental margins (Baiyun Sag, South China Sea)
	Zhao, Fang; Alves, Tiago M.; Wu, Shiguo; Li, Wei; Huuse, Mads; Mi, Lijun; Sun, Qiliang; Ma, Benjun
刊名	EARTH AND PLANETARY SCIENCE LETTERS
	2016
卷号	445 页码:79-91
关键词	South China Sea continental margin breakup sequence magma volcanic edifices
通讯作者	Wu, SG ; Li, W (reprint author), Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China. ; Li, W (reprint author), Univ Kiel, Inst Geosci, D-24188 Kiel, Germany.
中文摘要	Three-dimensional (3D) seismic, borehole and geochemical data reveal a prolonged phase of post-rift magmatism on highly extended crust of the Baiyun Sag, South China Sea. Two volcanic complexes are identified and described in the context of continental rifting and diachronous continental breakup of the South China Sea. Biostratigraphic data from exploration wells BY7-1 and BY2, complemented by K-Ar datings from core samples, confirm that magmatic activity in the Baiyun Sag occurred in two main stages: (1) a first episode at the base of the Miocene (23.8 Ma); and (2) a second episode occurring at the end of the Early Miocene (17.6 Ma). The relative location of volcanic complexes in the Baiyun Sag, and their stratigraphic position, reveals prolonged magmatism inboard of the ocean-continent transition zone during continental breakup. We suggest that magmatism in the Baiyun Sag reflects progressive continental breakup in the South China Sea, with the last volcanic episode marking the end of a breakup sequence representing the early post-rift tectonic events associated with the continental breakup process. Seismic and borehole data from this breakup sequence records diachronous magma emplacement and complex changes in depositional environments during continental breakup. (C) 2016 The Authors. Published by Elsevier B.V.
学科主题	Geochemistry & Geophysics
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/15430]
专题	南海海洋研究所_中科院边缘海地质重点实验室
推荐引用方式 GB/T 7714	Zhao, Fang,Alves, Tiago M.,Wu, Shiguo,et al. Prolonged post-rift magmatism on highly extended crust of divergent continental margins (Baiyun Sag, South China Sea)[J]. EARTH AND PLANETARY SCIENCE LETTERS,2016,445:79-91.
APA	Zhao, Fang.,Alves, Tiago M..,Wu, Shiguo.,Li, Wei.,Huuse, Mads.,...&Ma, Benjun.(2016).Prolonged post-rift magmatism on highly extended crust of divergent continental margins (Baiyun Sag, South China Sea).EARTH AND PLANETARY SCIENCE LETTERS,445,79-91.
MLA	Zhao, Fang,et al."Prolonged post-rift magmatism on highly extended crust of divergent continental margins (Baiyun Sag, South China Sea)".EARTH AND PLANETARY SCIENCE LETTERS 445(2016):79-91.