| Possible Spatial Distribution of the Mesozoic Volcanic Arc in the Present-Day South China Sea Continental Margin and Its Tectonic Implications | |
| Li, Fucheng1,2; Sun, Zhen1; Yang, Hongfeng3 | |
| 2018-08-01 | |
| Source Publication | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
 |
| ISSN | 2169-9313 |
| Volume | 123Issue:8Pages:6215-6235 |
| Corresponding Author | Sun, Zhen(zhensun@scsio.ac.cn) ; Yang, Hongfeng(hyang@cuhk.edu.hk) |
| Abstract | 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. |
| Keyword | Mesozoic volcanic arc SCS continental margin magnetic anomaly petrology data breakup location |
| DOI | 10.1029/2017JB014861 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Geochemistry & Geophysics |
| WOS Subject | Geochemistry & Geophysics |
| WOS ID | WOS:000446170700004 |
| Publisher | AMER GEOPHYSICAL UNION |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.qdio.ac.cn/handle/337002/160467 |
| Collection | 海洋地质与环境重点实验室 |
| Corresponding Author | Sun, Zhen; Yang, Hongfeng |
| Affiliation | 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 |
| First Author Affilication | Institute of Oceanology, Chinese Academy of Sciences |
| Corresponding Author Affilication | Institute of Oceanology, Chinese Academy of Sciences |
| Recommended Citation 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. |
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| Possible Spatial Dis（2744KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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