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DOI | 10.1002/2017GL076531 |
Age of the Subducting Philippine Sea Slab and Mechanism of Low-Frequency Earthquakes | |
Hua, Yuanyuan1,2; Zhao, Dapeng1; Xu, Yixian3; Liu, Xin1,4,5 | |
2018-03-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:5页码:2303-2310 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan; Peoples R China |
英文摘要 | Nonvolcanic low-frequency earthquakes (LFEs) usually occur in young and warm subduction zones under condition of near-lithostatic pore fluid pressure. However, the relation between the LFEs and the subducting slab age has never been documented so far. Here we estimate the lithospheric age of the subducting Philippine Sea (PHS) slab beneath the Nankai arc by linking seismic tomography and a plate reconstruction model. Our results show that the LFEs in SW Japan take place in young parts (similar to 17-26 Myr) of the PHS slab. However, no LFE occurs beneath the Kii channel where the PHS slab is very young (similar to 15 Myr) and thin (similar to 29 km), forming an LFE gap there. According to the present results and previous works, we think that the LFE gap at the Kii channel is caused by joint effects of several factors, including the youngest slab age, high temperature, low fluid content, high permeability of the overlying plate, a slab tear, and hot upwelling flow below the PHS slab. Plain Language Summary Nonvolcanic low-frequency earthquakes (LFEs) have been widely observed in recent years, which usually occur in young and warm subduction zones in the circum-Pacific regions and sometimes may become precursors of large megathrust earthquakes. However, the generating mechanism of the LFEs is still not very clear. In this study we estimate the lithosphere age of the subducting Philippine Sea slab and find a close relationship between the slab age and the LFE distribution in SW Japan. An LFE gap exists at the Kii channel. We think that the gap is caused by joint effects of several factors, including the youngest slab age, high temperature, low fluid content, high permeability of the overlying plate, a slab tear, and hot upwelling flow below the Philippine Sea slab. The present results shed new light on the generating mechanism of the LFEs and subduction dynamics. |
英文关键词 | low-frequency earthquakes slab age southwest Japan Philippine Sea slab |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000428402400021 |
WOS关键词 | SAN-ANDREAS FAULT ; SOUTHWEST JAPAN ; EPISODIC TREMOR ; NANKAI TROUGH ; ATTENUATION TOMOGRAPHY ; SEISMOGENIC ZONE ; SLOW EARTHQUAKES ; COSEISMIC SLIP ; SILENT SLIP ; PLATE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27646 |
专题 | 气候变化 |
作者单位 | 1.Tohoku Univ, Dept Geophys, Sendai, Miyagi, Japan; 2.China Univ Geosci, Inst Geophys & Geomat, Subsurface Multiscale Imaging Key Lab Hubei Prov, Wuhan, Hubei, Peoples R China; 3.Zhejiang Univ, Sch Earth Sci, Hangzhou, Zhejiang, Peoples R China; 4.Ocean Univ China, MOE, Key Lab Submarine Geosci & Prospecting Tech, Qingdao, Peoples R China; 5.Ocean Univ China, Coll Marine Geosci, Qingdao, Peoples R China |
推荐引用方式 GB/T 7714 | Hua, Yuanyuan,Zhao, Dapeng,Xu, Yixian,et al. Age of the Subducting Philippine Sea Slab and Mechanism of Low-Frequency Earthquakes[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(5):2303-2310. |
APA | Hua, Yuanyuan,Zhao, Dapeng,Xu, Yixian,&Liu, Xin.(2018).Age of the Subducting Philippine Sea Slab and Mechanism of Low-Frequency Earthquakes.GEOPHYSICAL RESEARCH LETTERS,45(5),2303-2310. |
MLA | Hua, Yuanyuan,et al."Age of the Subducting Philippine Sea Slab and Mechanism of Low-Frequency Earthquakes".GEOPHYSICAL RESEARCH LETTERS 45.5(2018):2303-2310. |
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