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学科主题: Geochemistry & Geophysics
题名: The 2007 Niigata earthquake: Effect of arc magma and fluids
作者: Xia, SH ; Zhao, DP ; Qiu, XL
通讯作者: shxia1982@yahoo.com ; zhao@aob.geophys.tohoku.ac.jp
关键词: the 2004 and 2007 Niigata earthquakes ; seismic tomography ; slab dehydration ; the Amur plate ; magma and fluids
刊名: PHYSICS OF THE EARTH AND PLANETARY INTERIORS
发表日期: 2008
卷: 166, 期:40606, 页:153-166
收录类别: sci
部门归属: [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
项目归属: 海洋地质
摘要: To 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.
原文出处: 查看原文
WOS记录号: WOS:000255474800004
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/4556
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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Recommended Citation:
Xia, SH; Zhao, DP; Qiu, XL.The 2007 Niigata earthquake: Effect of arc magma and fluids,PHYSICS OF THE EARTH AND PLANETARY INTERIORS,2008,166(40606):153-166
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