Early Miocene magmatism in the Baiyun Sag (South China Sea): A view to the origin of intense post-rift magmatism

doi:10.1016/j.gr.2022.05.013

CORC > 深海科学与工程研究所 > 中国科学院深海科学与工程研究所 > 深海科学研究部 > 深海地球物理与资源研究室

	Early Miocene magmatism in the Baiyun Sag (South China Sea): A view to the origin of intense post-rift magmatism
	Sun, Qiliang 4,5; Alves, Tiago M.3; Wu, Shiguo 2; Zhao, Minghui 1; Xie, Xinong 5
刊名	GONDWANA RESEARCH
	2023-08-01
卷号	120 页码:127-144
关键词	Magmatism Magma plumbing system Listric boundary fault Hainan Plume South China Sea
ISSN号	1342-937X
DOI	10.1016/j.gr.2022.05.013
通讯作者	Sun, Qiliang(sunqiliang@cug.edu.cn)
英文摘要	Post-rift magmatism associated with seafloor spreading (-32 Ma to -15 Ma) and post-spreading tectonics (from -15 Ma to the present day) is widely recorded in the South China Sea (SCS). However, the phenomena originating this magmatism are still under debate, hindering a full understanding of the SCS' evolution. In this study, extensive and voluminous magmatic bodies in the northern SCS are investigated based on the integration of 3D/2D seismic and borehole data. Magmatism occurred from -19.0 Ma to -17.5 Ma, a period of time marking the cessation of seafloor spreading above listric boundary faults formed on the southern shoulder of the Baiyun Sag. Magmatism close to the main basin depocenter (Magmatic Zone 1) is documented in the form of oblique/saucer sills that step upwards. They have fed volcanoes and lava flows to a paleo-seabed via igneous dikes. In contrast, magmatism in the shoulders of the Baiyun Sag (Magmatic zones 2 and 3) occurred above listric boundary faults that formed large magma pathways. The phase of magmatism documented in this work was probably triggered by the retreat of the Hainan Plume and associated mantle readjustments during jumps in spreading-ridge location. These events rejuvenated mantle upwelling underneath the highly stretched Baiyun Sag to generate partial melting. Mantle upwelling also reactivated the listric boundary faults flanking this basin, generating migration pathways for deep-seated magma. This work addresses the syn-spreading magma plumbing system of the Baiyun Sag in detail, and provides evidence for the origin of intense post-rift magmatism in the northern SCS. It also highlights that mantle readjustments triggered by changes in seafloor spreading (ridge jump or cessation of spreading) can generate significant post-rift magmatism.& COPY; 2022 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
资助项目	National Key Ramp;D Program of China[2018YFC0310000] ; National Scientific Foundation of China[42176085] ; National Scientific Foundation of China[41676051] ; National Scientific Foundation of China[41730532] ; Fundamental Research Funds for the Central Universities-the China University of Geosciences (Wuhan)[CUG2106207]
WOS关键词	RIVER MOUTH BASIN ; NORTHERN MARGIN ; SPATIAL-DISTRIBUTION ; CONTINENTAL MARGINS ; VOLCANIC MOUNDS ; EVOLUTION ; INSIGHTS ; CRUST ; RIFT ; FEATURES
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:001039993900001
资助机构	National Key Ramp;D Program of China ; National Scientific Foundation of China ; Fundamental Research Funds for the Central Universities-the China University of Geosciences (Wuhan)
内容类型	期刊论文
源URL	[http://ir.idsse.ac.cn/handle/183446/10414]
专题	深海科学研究部_深海地球物理与资源研究室
通讯作者	Sun, Qiliang
作者单位	1.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Peoples R China 2.Chinese Acad Sci, Inst Deep sea Sci & Engn, Lab Marine Geophys & Georesources, Sanya 572000, Peoples R China 3.Cardiff Univ, Sch Earth & Environm Sci, 3D Seism Lab, Main Bldg,Pk Pl, Cardiff CF10 3AT, Wales 4.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266061, Peoples R China 5.China Univ Geosci, Hubei Key Lab Marine Geol Resources, Wuhan 430074, Peoples R China
推荐引用方式 GB/T 7714	Sun, Qiliang,Alves, Tiago M.,Wu, Shiguo,et al. Early Miocene magmatism in the Baiyun Sag (South China Sea): A view to the origin of intense post-rift magmatism[J]. GONDWANA RESEARCH,2023,120:127-144.
APA	Sun, Qiliang,Alves, Tiago M.,Wu, Shiguo,Zhao, Minghui,&Xie, Xinong.(2023).Early Miocene magmatism in the Baiyun Sag (South China Sea): A view to the origin of intense post-rift magmatism.GONDWANA RESEARCH,120,127-144.
MLA	Sun, Qiliang,et al."Early Miocene magmatism in the Baiyun Sag (South China Sea): A view to the origin of intense post-rift magmatism".GONDWANA RESEARCH 120(2023):127-144.