Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016GL071798 |
Depth variations in seismic velocity in the subducting crust: Evidence for fluid-related embrittlement for intermediate-depth earthquakes | |
Shiina, Takahiro1,2; Nakajima, Junichi1,3; Matsuzawa, Toru1; Toyokuni, Genti1; Kita, Saeko4 | |
2017-01-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan |
英文摘要 | We investigated seismic wave velocity in the subducting crust of the Pacific slab beneath eastern Hokkaido, northern Japan. To detect depth-dependent properties of the seismic velocities in the crust, we analyzed guided waves that propagate in the crust and estimated P wave velocity (V-p) of 6.5-7.5km/s and S wave velocity (V-s) of 3.6-4.2km/s at depths of 50-100km. The results show that the obtained V-p and V-s are 10-15% lower than those expected for the fully hydrated mid-ocean ridge basalt, suggesting the existence of aqueous fluids by similar to 1 vol % in the crust at this depth range. Our observations suggest that overpressurized fluids channeled in the subducting crust plays as a dominant factor for facilitating the genesis of crustal earthquakes at intermediate depths. |
英文关键词 | subducting zone oceanic crust guided wave seismic velocity intermediate-depth earthquakes fluid-related embrittelment |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000395652600026 |
WOS关键词 | NORTHEASTERN JAPAN ARC ; OCEANIC-CRUST ; WATER TRANSPORTATION ; MANTLE WEDGE ; SLAB BENEATH ; HOKKAIDO ; ANISOTROPY ; LAWSONITE ; LOCATION ; GEOMETRY |
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/28007 |
专题 | 气候变化 |
作者单位 | 1.Tohoku Univ, Grad Sch Sci, Res Ctr Predict Earthquakes & Volcan Erupt, Sendai, Miyagi, Japan; 2.Hokkaido Univ, Grad Sch Sci, Inst Seismol & Volcanol, Sapporo, Hokkaido, Japan; 3.Tokyo Inst Technol, Dept Earth & Planetary Sci, Tokyo, Japan; 4.Hiroshima Univ, Grad Sch Sci, Hiroshima, Japan |
推荐引用方式 GB/T 7714 | Shiina, Takahiro,Nakajima, Junichi,Matsuzawa, Toru,et al. Depth variations in seismic velocity in the subducting crust: Evidence for fluid-related embrittlement for intermediate-depth earthquakes[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(2). |
APA | Shiina, Takahiro,Nakajima, Junichi,Matsuzawa, Toru,Toyokuni, Genti,&Kita, Saeko.(2017).Depth variations in seismic velocity in the subducting crust: Evidence for fluid-related embrittlement for intermediate-depth earthquakes.GEOPHYSICAL RESEARCH LETTERS,44(2). |
MLA | Shiina, Takahiro,et al."Depth variations in seismic velocity in the subducting crust: Evidence for fluid-related embrittlement for intermediate-depth earthquakes".GEOPHYSICAL RESEARCH LETTERS 44.2(2017). |
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