Possible Spatial Distribution of the Mesozoic Volcanic Arc in the Present-Day South China Sea Continental Margin and Its Tectonic Implications

doi:10.1029/2017JB014861

QIBEBT-IR

	Possible Spatial Distribution of the Mesozoic Volcanic Arc in the Present-Day South China Sea Continental Margin and Its Tectonic Implications
	Li, Fucheng 1,2; Sun, Zhen 1; Yang, Hongfeng 3
	2018-08-01
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
ISSN	2169-9313
卷号	123 期号:8 页码:6215-6235
摘要	The distribution of the Late Mesozoic volcanic arc in the South China Sea (SCS) continental margin has long been a controversial topic due to its significance in understanding the transition mechanism of a margin from subduction to extension. Here a comprehensive analysis was conducted in the margin using reprocessed magnetic data, newly collected drilling/dredging samples, depositional environment, and deformation style inferred from multichannel seismic profiles to jointly constrain the possible distribution of the Mesozoic volcanic arc. From the map of reduced-to-the-pole magnetic anomaly, several high-positive magnetic anomaly belts can be discriminated, which cross the central Pearl River Mouth Basin, extend southwestward to the Zhongsha (Macclesfield Bank) and Xisha Islands (Paracel Islands), and distribute discontinuously around the southwest subbasin. Geophysical analysis shows that these belts have similar amplitudes and magnetic depths to known volcanic arcs, such as the Luzon, Cagayan, and Sulu arcs. Furthermore, the high-amplitude positive magnetic anomaly belts coincide with the distribution of Late Mesozoic arc-like granites, intermediate rocks, and agglomerates, suggesting that the belts possibly originated from the existence of Late Mesozoic volcanic arc. Accretion and compression environment located in front of the inferred arc provides independent supports to our interpretation. Results indicate that the southwest part of the arc is distributed on both sides of the southwest SCS subbasin, whereas the northeast part remains nearly in its original location, further suggesting that the breakup locations for the SCS margin might be the volcanic front/forearc in the northeast and the arc in the southwest during the opening of the SCS basin.
关键词	Mesozoic volcanic arc SCS continental margin magnetic anomaly petrology data breakup location
DOI	10.1029/2017JB014861
关键词[WOS]	NORTH PALAWAN BLOCK ; SOUTHEASTERN CHINA ; SUBDUCTION-ZONE ; MAGNETIC-ANOMALIES ; FORE-ARC ; LITHOSPHERIC EXTENSION ; STRATIGRAPHIC DIVISION ; ISOTOPIC CONSTRAINTS ; GEOPHYSICAL RESEARCH ; CHAOSHAN DEPRESSION
语种	英语
资助项目	NSFC[U1301233] ; NSFC[41606073] ; Guangdong province[U1301233] ; Guangdong NSF research team project[2017A030312002] ; Open Fund of the Key Laboratory of Marine Geology and Environment, Chinese Academy of Sciences[MGE2016KG03] ; Strategic Priority Research Program of the Chinese Academy of Science[XDA13010303] ; Open Foundation of Key Laboratory of Submarine Geosciences, SOA ; Faculty of Science from the Chinese University of Hong Kong ; HKSAR Research Grant Council Grants[24601515] ; HKSAR Research Grant Council Grants[14313816]
WOS研究方向	Geochemistry & Geophysics
项目资助者	NSFC ; Guangdong province ; Guangdong NSF research team project ; Open Fund of the Key Laboratory of Marine Geology and Environment, Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Science ; Open Foundation of Key Laboratory of Submarine Geosciences, SOA ; Faculty of Science from the Chinese University of Hong Kong ; HKSAR Research Grant Council Grants
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000446170700004
出版者	AMER GEOPHYSICAL UNION
引用统计
文献类型	期刊论文
条目标识符	http://ir.qibebt.ac.cn/handle/337004/11360
专题	中国科学院青岛生物能源与过程研究所
通讯作者	Sun, Zhen; Yang, Hongfeng
作者单位	1.Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou, Guangdong, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao, Peoples R China 3.Chinese Univ Hong Kong, Fac Sci, Earth Syst Sci Programme, Hong Kong, Hong Kong, Peoples R China
推荐引用方式 GB/T 7714	Li, Fucheng,Sun, Zhen,Yang, Hongfeng. Possible Spatial Distribution of the Mesozoic Volcanic Arc in the Present-Day South China Sea Continental Margin and Its Tectonic Implications[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2018,123(8):6215-6235.
APA	Li, Fucheng,Sun, Zhen,&Yang, Hongfeng.(2018).Possible Spatial Distribution of the Mesozoic Volcanic Arc in the Present-Day South China Sea Continental Margin and Its Tectonic Implications.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,123(8),6215-6235.
MLA	Li, Fucheng,et al."Possible Spatial Distribution of the Mesozoic Volcanic Arc in the Present-Day South China Sea Continental Margin and Its Tectonic Implications".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 123.8(2018):6215-6235.