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Along-strike variations in intermediate-depth seismicity in the southernmost Mariana subduction zone: Impact from the subduction of an oceanic plateau

文献类型：期刊论文

作者Chen, Han6,7; Zhu, Gaohua8; Yang, Hongfeng1,7; Zhang, Jiangyang9; Lu, Shaopin5,6; Chen, Chuanxu2; Lin, Jian3,4; Luo, Yiming3,4
刊名TECTONOPHYSICS
出版日期2025-10-27
卷号913页码:14
关键词Intermediate-depth earthquakes Ocean Bottom Seismometer Mariana subduction zone EQTransformer Subduction of oceanic plateau
ISSN号0040-1951
DOI10.1016/j.tecto.2025.230875
通讯作者Zhu, Gaohua(zhugaohua@qdio.ac.cn) ; Yang, Hongfeng(hyang@cuhk.edu.hk)
英文摘要Intermediate-depth earthquakes, i.e., earthquakes occurring at depths of 60 to 300 km, have been observed globally. However, the mechanisms underlying intermediate-depth earthquakes and their potential relationship with shallow subduction zone structures are still poorly understood. Utilizing newly obtained near-field Ocean Bottom Seismometer (OBS) data and a machine-learning-based method (EQTransformer), we have detected and located 613 earthquakes from 5 September 2018 to 22 October 2019. The observation identifies the variations in the distribution patterns of intermediate-depth earthquakes at the junction of the Pacific plate and the Caroline Plateau. Double seismic zones (DSZs) were observed in the Pacific segment, while a single seismic zone (SSZ) was found in the Caroline segment. The consistency between observed seismicity patterns, tectonic geomorphology, outer-rise faulting, and slab P-T modeling strongly suggests intermediate-depth earthquakes are likely related to the dehydration of hydrous minerals. We propose that the seismicity difference between the two segments is attributed to the subducted oceanic plateau, which restricts hydration of the subducting plate thereby suppressing the generation of intermediate-depth earthquakes. Our results emphasize the important influence of oceanic plateau subduction in the generation and distribution of intermediate-depth earthquakes.
WOS关键词CAROLINE RIDGE ; EARTHQUAKE LOCATION ; THERMAL STRUCTURE ; DEEP EARTHQUAKES ; BENEATH ; MODEL ; FAULT ; EVOLUTION ; TRENCH ; ARC
资助项目National Key Research and Development Program of China[2023YFF0806400] ; National Natural Science Foundation of China[92158205] ; National Natural Science Foundation of China[91858207] ; National Natural Science Foundation of China[9215820007] ; National Natural Science Foundation of China[41890813] ; National Natural Science Foundation of China[42074123] ; National Natural Science Foundation of China[42230805] ; National Natural Science Foundation of China[42406064] ; China Postdoctoral Science Foundation[2023M741525] ; Hong Kong Research Grant Council[14304820] ; Faculty of Science at CUHK, Shenzhen Science and Technology Innovation Commission[JCYJ20220818100417038] ; Faculty of Science at CUHK, Shenzhen Science and Technology Innovation Commission[KCXFZ20211020174803005] ; Chinese Academy of Sciences[Y4SL021001]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:001583943200001
出版者ELSEVIER
源URL[http://ir.qdio.ac.cn/handle/337002/203473]  
专题中国科学院海洋研究所
通讯作者Zhu, Gaohua; Yang, Hongfeng
作者单位1.Chinese Univ Hong Kong, Shenzhen Res Inst, Shenzhen, Peoples R China
2.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya, Peoples R China
3.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen, Peoples R China
4.Southern Univ Sci & Technol, Adv Inst Ocean Res, Shenzhen, Peoples R China
5.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai, Guangdong, Peoples R China
6.Sun Yat Sen Univ, Sch Earth Sci & Engn, Zhuhai, Guangdong, Peoples R China
7.Chinese Univ Hong Kong, Fac Sci, Dept Earth & Environm Sci, Shatin, Hong Kong, Peoples R China
8.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Observat & Forecasting, Qingdao, Peoples R China
9.Chinese Acad Sci, South China Sea Inst Oceanol, Guangzhou, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Han,Zhu, Gaohua,Yang, Hongfeng,et al. Along-strike variations in intermediate-depth seismicity in the southernmost Mariana subduction zone: Impact from the subduction of an oceanic plateau[J]. TECTONOPHYSICS,2025,913:14.
APA Chen, Han.,Zhu, Gaohua.,Yang, Hongfeng.,Zhang, Jiangyang.,Lu, Shaopin.,...&Luo, Yiming.(2025).Along-strike variations in intermediate-depth seismicity in the southernmost Mariana subduction zone: Impact from the subduction of an oceanic plateau.TECTONOPHYSICS,913,14.
MLA Chen, Han,et al."Along-strike variations in intermediate-depth seismicity in the southernmost Mariana subduction zone: Impact from the subduction of an oceanic plateau".TECTONOPHYSICS 913(2025):14.

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来源：海洋研究所

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