Local earthquake seismic tomography of the Southernmost Mariana subduction zone
文献类型：期刊论文
| 作者 | Li, Dong1,2 ; Chen, Chuanxu1; Wu, Shiguo1
|
| 刊名 | FRONTIERS IN MARINE SCIENCE
 |
| 出版日期 | 2023-11-27 |
| 卷号 | 10页码:10 |
| 关键词 | southernmost Mariana Trench seismic tomography subduction zone mantle wedge ocean bottom seismometer |
| DOI | 10.3389/fmars.2023.1284881 |
| 通讯作者 | Chen, Chuanxu(chencx@idsse.ac.cn) |
| 英文摘要 | We employed seismic tomography to examine the velocity structure of the upper mantle in the Southernmost Mariana subduction zone. Our study focuses on data collected during a six-month experiment from 15 December 2016 to 12 June 2017, using 11 ocean bottom seismometers. By examining over 3700 local arrival times, we are able to determine the three-dimensional Vp and Vs structure. The subducting slab in this region displays a P- and S-wave velocity 2 similar to 6% higher than normal mantle and a lower Vp/Vs, with an average dip of 45 degrees at depths ranging from 50 to 100 km. Additionally, our velocity images also shed new lights to the velocity anomalies of the mantle wedge region on top of the subducting slab, from the trench to the remnant arc. We observed slower velocity anomalies in the mantle wedge beneath the Southwest Mariana Rift, the West Mariana Ridge, and the forearc. In the outer forearc, a low-velocity anomaly is observed at depths shallower than 50 km, indicating mantle serpentinization and the presence of water. Additionally, a melt production region is observed beneath the central part of the forearc block at a depth of 40-60 km suggesting the possibility of melting processes in this region. |
| WOS关键词 | ARC MAGMATISM ; BENEATH ; ALGORITHM ; INVERSION ; GEOMETRY |
| 资助项目 | National Key Research and Development Program of China10.13039/501100012166 |
| WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology |
| 语种 | 英语 |
| 出版者 | FRONTIERS MEDIA SA |
| WOS记录号 | WOS:001123924600001 |
| 资助机构 | National Key Research and Development Program of China10.13039/501100012166 |
| 源URL | [http://ir.idsse.ac.cn/handle/183446/10741]  |
| 专题 | 深海科学研究部_深海地球物理与资源研究室 研究生部 |
| 通讯作者 | Chen, Chuanxu |
| 作者单位 | 1.Chinese Acad Sci, Inst Deep sea Sci & Engn, Sanya, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Dong,Chen, Chuanxu,Wu, Shiguo. Local earthquake seismic tomography of the Southernmost Mariana subduction zone[J]. FRONTIERS IN MARINE SCIENCE,2023,10:10. |
| APA | Li, Dong,Chen, Chuanxu,&Wu, Shiguo.(2023).Local earthquake seismic tomography of the Southernmost Mariana subduction zone.FRONTIERS IN MARINE SCIENCE,10,10. |
| MLA | Li, Dong,et al."Local earthquake seismic tomography of the Southernmost Mariana subduction zone".FRONTIERS IN MARINE SCIENCE 10(2023):10. |
入库方式： OAI收割
来源：深海科学与工程研究所
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