IOCAS-IR  > 海洋地质与环境重点实验室
Subduction of a buoyant plateau at the Manila Trench: Tomographic evidence and geodynamic implications
Fan, Jianke1,2; Zhao, Dapeng3; Dong, Dongdong1,2
2016-02-01
Source PublicationGEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
Volume17Issue:2Pages:571-586
SubtypeArticle
AbstractWe determined P-wave tomographic images by inverting a large number of arrival-time data from 2749 local earthquakes and 1462 teleseismic events, which are used to depict the three-dimensional morphology of the subducted Eurasian Plate along the northern segment of the Manila Trench. Dramatic changes in the dip angle of the subducted Eurasian Plate are revealed from the north to the south, being consistent with the partial subduction of a buoyant plateau beneath the Luzon Arc. Slab tears may exist along the edges of the buoyant plateau within the subducted plate induced by the plateau subduction, and the subducted lithosphere may be absent at depths greater than 250 km at approximate to 19 degrees N and approximate to 21 degrees N. The subducted buoyant plateau is possibly oriented toward NW-SE, and the subducted plate at approximate to 21 degrees N is slightly steeper than that at approximate to 19 degrees N. These results may explain why the western and eastern volcanic chains in the Luzon Arc are separated by approximate to 50 km at approximate to 18 degrees N, whereas they converge into a single volcanic chain northward, which may be related to the oblique subduction along the Manila Trench caused by the northwestern movement of the Philippine Sea Plate. A low-velocity zone is revealed at depths of 20-200 km beneath the Manila Accretionary Prism at approximate to 22 degrees N, suggesting that the subduction along the Manila Trench may stop there and the collision develops northward. The Taiwan Orogeny may originate directly from the subduction of the buoyant plateau, because the initial time of the Taiwan Orogeny is coincident with that of the buoyant plateau subduction.
KeywordSeismic Tomography Manila Trench Subduction Buoyant Plateau Earthquakes
DOI10.1002/2015GC006201
Indexed BySCI
Language英语
WOS IDWOS:000373070100019
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/126250
Collection海洋地质与环境重点实验室
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Peoples R China
3.Tohoku Univ, Dept Geophys, Sendai, Miyagi 980, Japan
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Fan, Jianke,Zhao, Dapeng,Dong, Dongdong. Subduction of a buoyant plateau at the Manila Trench: Tomographic evidence and geodynamic implications[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2016,17(2):571-586.
APA Fan, Jianke,Zhao, Dapeng,&Dong, Dongdong.(2016).Subduction of a buoyant plateau at the Manila Trench: Tomographic evidence and geodynamic implications.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,17(2),571-586.
MLA Fan, Jianke,et al."Subduction of a buoyant plateau at the Manila Trench: Tomographic evidence and geodynamic implications".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 17.2(2016):571-586.
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