SCSIO OpenIR  > 中科院边缘海地质重点实验室
The 2007 Niigata earthquake: Effect of arc magma and fluids
Xia, SH; Zhao, DP; Qiu, XL; shxia1982@yahoo.com; zhao@aob.geophys.tohoku.ac.jp
2008
Source PublicationPHYSICS OF THE EARTH AND PLANETARY INTERIORS
ISSN0031-9201
Volume166Issue:40606Pages:153-166
AbstractTo clarify the generation mechanism of large crustal earthquakes in the Amur-Okhotsk plate boundary, we determined high-resolution 3D seismic velocity (V-p, V-s) and Poisson's ratio structures in Niigata, Northeast Japan using a large number of P- and S-wave arrival times from the aftershocks of the 2004 and 2007 Niigata earthquakes as well as many intermediate-depth earthquakes in this area. Our results show that the Niigata mainshocks occurred around zones of low-velocity and high-Poisson's ratio, which suggest that fluids may have influenced the nucleation and rupture processes of the 2004 and 2007 Niigata earthquakes. A zone with pronounced low-velocity and high Poisson's ratio is revealed under the source areas of the 2004 and 2007 Niigata earthquakes in the lower crust and uppermost mantle, which may reflect the arc magma and fluids ascending from the upper-mantle wedge. These results indicate that the generation of the 2004 and 2007 Niigata earthquakes was affected by the ascending magma and fluids released by the dehydration process of the subducting Pacific slab. (C) 2008 Elsevier B.V. All rights reserved.
Department[Xia, Shaohong; Qiu, Xuelin] CAS, SCSIO, CAS Key Lab Marginal Sea Geol, Guangzhou, Peoples R China; [Xia, Shaohong; Zhao, Dapeng] Tohoku Univ, Dept Geophys, Sendai, Miyagi 9808578, Japan
KeywordThe 2004 And 2007 Niigata Earthquakes Seismic Tomography Slab Dehydration The Amur Plate Magma And Fluids
Subject AreaGeochemistry & Geophysics
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Indexed Bysci
Funding Project海洋地质
WOS IDWOS:000255474800004
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Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/4556
Collection中科院边缘海地质重点实验室
Corresponding Authorshxia1982@yahoo.com; zhao@aob.geophys.tohoku.ac.jp
Recommended Citation
GB/T 7714
Xia, SH,Zhao, DP,Qiu, XL,et al. The 2007 Niigata earthquake: Effect of arc magma and fluids[J]. PHYSICS OF THE EARTH AND PLANETARY INTERIORS,2008,166(40606):153-166.
APA Xia, SH,Zhao, DP,Qiu, XL,shxia1982@yahoo.com,&zhao@aob.geophys.tohoku.ac.jp.(2008).The 2007 Niigata earthquake: Effect of arc magma and fluids.PHYSICS OF THE EARTH AND PLANETARY INTERIORS,166(40606),153-166.
MLA Xia, SH,et al."The 2007 Niigata earthquake: Effect of arc magma and fluids".PHYSICS OF THE EARTH AND PLANETARY INTERIORS 166.40606(2008):153-166.
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