IOCAS-IR  > 海洋地质与环境重点实验室
P-wave tomography of subduction zones around the central Philippines and its geodynamic implications
Fan, Jianke1,2; Zhao, Dapeng3; Dong, Dongdong1,2; Zhang, Guangxu1,2
2017-09-15
Source PublicationJOURNAL OF ASIAN EARTH SCIENCES
Volume146Pages:76-89
SubtypeArticle
AbstractHigh-resolution tomographic images are obtained by inverting a large number of arrival-time data of local earthquakes and teleseismic events to depict the 3-D crustal and upper mantle structure beneath the central Philippines. Our tomographic results show that the subducted South China Sea slab beneath the southern segment of the Manila Trench steepens and tears, resulting in migration of the locus of active volcanism in the Macolod Corridor, due to the collision between the Palawan microcontinental block and the Philippine Mobile Belt. The subduction of the Philippine Sea Plate along the Philippine Trench started at 10-12 degrees N or south of 12 degrees N, the central part of the trench, from at least similar to 10 Ma estimated from our tomographic images. Our results reveal clearly a high-velocity anomaly in and around the mantle transition zone, which is interpreted as the subducted Proto South China Sea slab that sinks deeper southeastward, being well consistent with geological results that the age of collision between the Palawan microcontinental block and the Philippine Mobile Belt becomes younger from the south to the north. This collision zone can be divided into northern and southern segments, demarcated by the salient point of the collision zone, which is probably the boundary between the South China Sea slab and the Proto South China Sea slab, and may be ascribed to the complete consumption of the two slabs.
KeywordSeismic Tomography Manila Trench Philippine Trench Proto South China Sea Slab Subduction Dynamics Earthquakes
DOI10.1016/j.jseaes.2017.05.015
Indexed BySCI
Language英语
WOS IDWOS:000414820300005
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/143049
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 266071, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266071, Peoples R China
3.Tohoku Univ, Dept Geophys, Sendai, Miyagi 9808578, Japan
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Fan, Jianke,Zhao, Dapeng,Dong, Dongdong,et al. P-wave tomography of subduction zones around the central Philippines and its geodynamic implications[J]. JOURNAL OF ASIAN EARTH SCIENCES,2017,146:76-89.
APA Fan, Jianke,Zhao, Dapeng,Dong, Dongdong,&Zhang, Guangxu.(2017).P-wave tomography of subduction zones around the central Philippines and its geodynamic implications.JOURNAL OF ASIAN EARTH SCIENCES,146,76-89.
MLA Fan, Jianke,et al."P-wave tomography of subduction zones around the central Philippines and its geodynamic implications".JOURNAL OF ASIAN EARTH SCIENCES 146(2017):76-89.
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