Seismic Anisotropy Evidence for Ductile Deformation of the Forearc Lithospheric Mantle in Subduction Zones
文献类型：期刊论文
| 作者 | Wang, Jian1,2,3; Huang, Xiaoge1,2; Zhao, Dapeng4; Yao, Zhenxing1,2 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
 |
| 出版日期 | 2019-07-01 |
| 卷号 | 124期号:7页码:7013-7027 |
| 关键词 | seismic anisotropy tomography subduction zone lithospheric deformation |
| ISSN号 | 2169-9313 |
| DOI | 10.1029/2018JB016912 |
| 英文摘要 | Seismic anisotropy provides important information on the structure and geodynamics of the Earth. The forearc mantle wedge in subduction zones mainly exhibits trench-parallel azimuthal anisotropy globally, which is inconsistent with the model of olivine a axis aligning with the slab-driven corner flow. Its formation mechanism is currently unclear. Here we present high-resolution 3-D P wave anisotropic tomography of the Tohoku subduction zone. We suggest that ductile deformation of the forearc lithospheric mantle of the overriding plate induces the trench-parallel azimuthal anisotropy and positive radial anisotropy (i.e., horizontal velocity > vertical velocity) in Tohoku. Our results provide the first seismic anisotropic evidence for the slab-mantle decoupling at a common depth of similar to 70 km. On the basis of the high-resolution seismic images, we propose a geodynamic model suggesting that the forearc mantle wedge anisotropy is produced via ductile deformation of dry olivine or hydrous antigorite lithospheric mantle, which accords well with the trench-parallel shear wave splitting measurements dominant in subduction zones globally. |
| WOS关键词 | LATTICE-PREFERRED ORIENTATION ; TRENCH-PARALLEL ANISOTROPY ; P-WAVE ; AZIMUTHAL ANISOTROPY ; NORTHEASTERN JAPAN ; 3-DIMENSIONAL STRUCTURE ; FLOW-FIELD ; OLIVINE ; BENEATH ; WEDGE |
| 资助项目 | National Natural Science Foundation of China[41474043] ; National Natural Science Foundation of China[41274089] ; Youth Innovation Promotion Association of CAS[2014058] ; Japan Society for the Promotion of Science[19H01996] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000481819500044 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Japan Society for the Promotion of Science ; Japan Society for the Promotion of Science ; Japan Society for the Promotion of Science ; Japan Society for the Promotion of Science ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Japan Society for the Promotion of Science ; Japan Society for the Promotion of Science ; Japan Society for the Promotion of Science ; Japan Society for the Promotion of Science ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Japan Society for the Promotion of Science ; Japan Society for the Promotion of Science ; Japan Society for the Promotion of Science ; Japan Society for the Promotion of Science ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Japan Society for the Promotion of Science ; Japan Society for the Promotion of Science ; Japan Society for the Promotion of Science ; Japan Society for the Promotion of Science |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/93353]  |
| 专题 | 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
| 通讯作者 | Wang, Jian |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Earth Sci, Beijing, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao, Shandong, Peoples R China 4.Tohoku Univ, Grad Sch Sci, Dept Geophys, Sendai, Miyagi, Japan |
| 推荐引用方式 GB/T 7714 | Wang, Jian,Huang, Xiaoge,Zhao, Dapeng,et al. Seismic Anisotropy Evidence for Ductile Deformation of the Forearc Lithospheric Mantle in Subduction Zones[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2019,124(7):7013-7027. |
| APA | Wang, Jian,Huang, Xiaoge,Zhao, Dapeng,&Yao, Zhenxing.(2019).Seismic Anisotropy Evidence for Ductile Deformation of the Forearc Lithospheric Mantle in Subduction Zones.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,124(7),7013-7027. |
| MLA | Wang, Jian,et al."Seismic Anisotropy Evidence for Ductile Deformation of the Forearc Lithospheric Mantle in Subduction Zones".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 124.7(2019):7013-7027. |
入库方式： OAI收割
来源：地质与地球物理研究所
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