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Back‐Arc Tectonics and Plate Reconstruction of the Philippine Sea‐South China Sea Region Since the Eocene

Liu, Jinping; Li, Sanzhong; Cao, Xianzhi; Dong, Hao; Suo, Yanhui; Jiang, Zhaoxia; Zhou, Jie; Li, Xiyao; Zhang, Ruixin; Liu, Lijun; Foulger, Gillian Rose

Back‐Arc Tectonics and Plate Reconstruction of the Philippine Sea‐South China Sea Region Since the Eocene Thumbnail


Authors

Jinping Liu

Sanzhong Li

Xianzhi Cao

Hao Dong

Yanhui Suo

Zhaoxia Jiang

Jie Zhou

Xiyao Li

Ruixin Zhang

Lijun Liu

Gillian Rose Foulger



Abstract

Insight into the evolution of Philippine Sea-South China Sea (SCS) plate motions helps reveal the driving mechanisms of the long-term tectonic complexity in Southeast Asia. Here, based on the integration of the most recent geological and seismic data, we present a new plate reconstruction model for this region characterized by back-arc extension and subduction since the Eocene. We suggest that the western boundary of the Philippine Sea Plate was a constant sinistral strike-slip fault at 55–22 Ma with a clockwise self-rotation. The connection between the SCS and Shikoku Ridges possibly initiates at 30 Ma, when their spreading times overlapped indicating an affinitive origin and magma source. Regional-scale geodynamic simulations interfaced with our reconstructed plate motion indicate that the seismic high-velocity body under the SCS is likely to be the leading edge of the Pacific Slab.

Citation

Liu, J., Li, S., Cao, X., Dong, H., Suo, Y., Jiang, Z., …Foulger, G. R. (2023). Back‐Arc Tectonics and Plate Reconstruction of the Philippine Sea‐South China Sea Region Since the Eocene. Geophysical Research Letters, 50(5), Article e2022GL102154. https://doi.org/10.1029/2022gl102154

Journal Article Type Article
Acceptance Date Feb 8, 2023
Online Publication Date Mar 1, 2023
Publication Date 2023
Deposit Date Apr 27, 2023
Publicly Available Date Apr 27, 2023
Journal Geophysical Research Letters
Print ISSN 0094-8276
Electronic ISSN 1944-8007
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 50
Issue 5
Article Number e2022GL102154
DOI https://doi.org/10.1029/2022gl102154

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Publisher Licence URL
http://creativecommons.org/licenses/by-nc-nd/4.0/

Copyright Statement
This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.




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