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DOI | 10.1002/2017GL074945 |
Eclogitization of the Subducted Oceanic Crust and Its Implications for the Mechanism of Slow Earthquakes | |
Wang, Xinyang1,2,3; Zhao, Dapeng3; Suzuki, Haruhiko4; Li, Jiabiao5; Ruan, Aiguo5 | |
2017-12-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:24 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Japan |
英文摘要 | The generating mechanism and process of slow earthquakes can help us to better understand the seismogenic process and the petrological evolution of the subduction system, but they are still not very clear. In this work we present robust P and S wave tomography and Poisson's ratio images of the subducting Philippine Sea Plate beneath the Kii peninsula in Southwest Japan. Our results clearly reveal the spatial extent and variation of a low-velocity and high Poisson's ratio layer which is interpreted as the remnant of the subducted oceanic crust. The low-velocity layer disappears at depths > 50 km, which is attributed to crustal eclogitization and consumption of fluids. The crustal eclogitization and destruction of the impermeable seal play a key role in the generation of slow earthquakes. The Moho depth of the overlying plate is an important factor affecting the depth range of slow earthquakes in warm subduction zones due to the transition of interface permeability from low to high there. The possible mechanism of the deep slow earthquakes is the dehydrated oceanic crustal rupture and shear slip at the transition zone in response to the crustal eclogitization and the temporal stress/strain field. A potential cause of the slow event gap existing beneath easternmost Shikoku and the Kii channel is the premature rupture of the subducted oceanic crust due to the large tensional force. |
英文关键词 | slow earthquakes crustal eclogitization tomography subduction dynamics permeability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000422954700015 |
WOS关键词 | LOW-FREQUENCY EARTHQUAKES ; NON-VOLCANIC TREMOR ; SOUTHWEST JAPAN ; EPISODIC TREMOR ; SILENT SLIP ; KANTO DISTRICT ; PHILIPPINE SEA ; ZONE ; CASCADIA ; MANTLE |
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/28537 |
专题 | 气候变化 |
作者单位 | 1.Nanjing Univ, Collaborat Innovat Ctr South China Sea Studies, Nanjing, Jiangsu, Peoples R China; 2.Nanjing Univ, Sch Geog & Oceanog Sci, Nanjing, Jiangsu, Peoples R China; 3.Tohoku Univ, Dept Geophys, Sendai, Miyagi, Japan; 4.Oyo Corp, Earthquake Res Ctr, Tokyo, Japan; 5.State Ocean Adm, Inst Oceanog 2, Hangzhou, Zhejiang, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Xinyang,Zhao, Dapeng,Suzuki, Haruhiko,et al. Eclogitization of the Subducted Oceanic Crust and Its Implications for the Mechanism of Slow Earthquakes[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(24). |
APA | Wang, Xinyang,Zhao, Dapeng,Suzuki, Haruhiko,Li, Jiabiao,&Ruan, Aiguo.(2017).Eclogitization of the Subducted Oceanic Crust and Its Implications for the Mechanism of Slow Earthquakes.GEOPHYSICAL RESEARCH LETTERS,44(24). |
MLA | Wang, Xinyang,et al."Eclogitization of the Subducted Oceanic Crust and Its Implications for the Mechanism of Slow Earthquakes".GEOPHYSICAL RESEARCH LETTERS 44.24(2017). |
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