Tectonic deformation and fine structure of the frontal accretionary wedge, northern Manila subduction zone | |
Gao JinWei1,3,4; Wu ShiGuo1,3; Yao YongJian2,4; Chen ChuanXu1,3; Song TaoRan1,3; Wang JiLiang1,3; Sun Jin1,3; Zhang HanYu1,3; Ma BenJun1,3; Xie YangBing1,3 | |
刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION |
2018-07-01 | |
卷号 | 61期号:7页码:2845-2858 |
关键词 | Manila Subduction Zone Accretionary Wedge Tectonic Deformation Incipient Subduction Multi-channel Seismic |
ISSN号 | 0001-5733 |
DOI | 10.6038/cjg2018L0461 |
英文摘要 | The Manila subduction zone is the eastern boundary of the South China Sea (SCS) which records key information on the evolution of the SCS, also is an area with active earthquakes and tsunamis. Using high resolution multi-channel seismic data across the northern Manila subduction zone, this paper characterizes the tectonic deformation and structure of the frontal accretionary wedge as well as magmatism and sedimentary features of the oceanic basin and trench in the subduction zone. Results show that the lower slope of accretionary wedge consists mainly of imbricated thrusts, structural wedges and blind thrusts that act as frontal faults, whereas the internal architecture of the upper slope is difficult to identify because of intense deformation and magmatism. All the thrust faults merged into a lower Miocene decollement which cuts off the middle Miocene strata and can be traced upward into the Pliocene strata, indicating that the fault is influenced by local buried seamounts and basement uplift below the accretionary wedge. Magmatic activities lasted from late Miocene to Quaternary in the oceanic basin, trench and accretionary wedge in the study area. We suggest that the accretionary wedge of the northern Manila subduction zone begun to thrust before 16. 5 Ma and is still propagating to the SCS through piggyback thrusting at present. The Manila subduction zone probably initiated in the late Oligocene when the oceanic basin of the SCS continued to spread. The region of hyper-extended continental crust extends from the continental slope to the oceanic basin between 19 degrees N and 21 degrees N in the northeastern SCS. The subduction of this hyper-extended continental crust resulted in a significant variation in the geometry of the northern Manila trench, which shows a concave eastward pattern to the Luzon Arc. |
WOS关键词 | South-china-sea ; Crustal Structure ; Convergent Margin ; Luzon Arc ; Trench ; Taiwan ; Philippines ; Evolution ; Ridge ; Tomography |
WOS研究方向 | Geochemistry & Geophysics |
语种 | 英语 |
出版者 | SCIENCE PRESS |
WOS记录号 | WOS:000438837800016 |
内容类型 | 期刊论文 |
版本 | 出版稿 |
源URL | [http://ir.idsse.ac.cn/handle/183446/7038] |
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 | Yao YongJian |
作者单位 | 1.Key Lab Submarine Resources & Prospecting, Sanya 572000, Hainan, Peoples R China 2.Guangzhou Marine Geol Survey, Guangzhou 510760, Guangdong, Peoples R China 3.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China 4.Minist Land & Resources, Key Lab Marine Mineral Resources, Guangzhou 510075, Guangdong, Peoples R China |
推荐引用方式 GB/T 7714 | Gao JinWei,Wu ShiGuo,Yao YongJian,et al. Tectonic deformation and fine structure of the frontal accretionary wedge, northern Manila subduction zone[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2018,61(7):2845-2858. |
APA | Gao JinWei.,Wu ShiGuo.,Yao YongJian.,Chen ChuanXu.,Song TaoRan.,...&Xie YangBing.(2018).Tectonic deformation and fine structure of the frontal accretionary wedge, northern Manila subduction zone.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,61(7),2845-2858. |
MLA | Gao JinWei,et al."Tectonic deformation and fine structure of the frontal accretionary wedge, northern Manila subduction zone".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 61.7(2018):2845-2858. |
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