Seismic Azimuthal Anisotropy of Northeastern Tibetan Plateau From Ambient Noise Double Beamforming Tomography: Implications for Crustal Deformation
文献类型：期刊论文
| 作者 | Wu, Xiaoyang1,2; Guo, Zhen2,3; Li, Shilin2; Yu, Yong2; Bai, Qipeng4; Chen, Yongshun John2 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
 |
| 出版日期 | 2023-06-01 |
| 卷号 | 128期号:6页码:16 |
| 关键词 | seismic ambient noise tomography double beamforming northeastern Tibetan Plateau seismic azimuthal anisotropy crustal deformation |
| ISSN号 | 2169-9313 |
| DOI | 10.1029/2022JB026109 |
| 通讯作者 | Guo, Zhen(guoz3@sustech.edu.cn) ; Chen, Yongshun John(johnyc@sustech.edu.cn) |
| 英文摘要 | In this study, we obtain a three-dimensional (3-D) high resolution seismic anisotropy model of NE Tibet using ambient noise double beamforming (DBF) tomography with ChinArray-Himalaya II data. DBF tomography technique allows for the simultaneous derivation of local phase velocity and azimuthal anisotropy from ambient noise cross-correlations without performing tomographic inversion. Based on the DBF tomography results, we have constructed a high resolution 3-D azimuthal anisotropic shear wave velocity model of NE Tibet. Our model indicates the presence of prominent low velocities and strong azimuthal anisotropy in the mid-to lower crust beneath the Songpan-Ganzi belt, while the mid-to lower crust of the Qilian belt exhibits relatively weak low velocity and azimuthal anisotropy. We propose that crustal channel flow may be the primary mechanism driving crustal deformation in the Songpan-Ganzi belt, which is in the mature part of the plateau. As the Qilian belt is at an early stage of plateau formation, it is characterized by crustal shortening with the development of a sub-vertical foliation. Additionally, the misalignment between predicted and observed shear wave splitting reveals decoupled crust and upper mantle deformation west of the Ordos block where eastward mantle flow is deflected by the lithospheric keel of Ordos. |
| WOS关键词 | SURFACE-WAVE TOMOGRAPHY ; LOW-VELOCITY ZONE ; MANTLE DEFORMATION ; RADIAL ANISOTROPY ; CROSS-CORRELATION ; QILIAN-SHAN ; BENEATH ; EASTERN ; INVERSION ; EVOLUTION |
| 资助项目 | National Science Foundation of China[42122027] ; National Science Foundation of China[41974052] ; National Science Foundation of China[41890814] ; National Science Foundation of China[U1901602] ; National Science Foundation of China[41904056] ; Shenzhen Sustainable Development Science and Technology Project[KCXFZ20201221173608023] ; Shanghai Science and Technology Committee[19dz1200200] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000999811800001 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/183223]  |
| 专题 | 海洋研究所_海洋地质与环境重点实验室 |
| 通讯作者 | Guo, Zhen; Chen, Yongshun John |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao, Peoples R China 2.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen, Peoples R China 3.Shanghai Sheshan Natl Geophys Observ & Res Stn, Shanghai, Peoples R China 4.Southern Univ Sci & Technol, Acad Adv Interdisciplinary Studies, Shenzhen, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Xiaoyang,Guo, Zhen,Li, Shilin,et al. Seismic Azimuthal Anisotropy of Northeastern Tibetan Plateau From Ambient Noise Double Beamforming Tomography: Implications for Crustal Deformation[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2023,128(6):16. |
| APA | Wu, Xiaoyang,Guo, Zhen,Li, Shilin,Yu, Yong,Bai, Qipeng,&Chen, Yongshun John.(2023).Seismic Azimuthal Anisotropy of Northeastern Tibetan Plateau From Ambient Noise Double Beamforming Tomography: Implications for Crustal Deformation.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,128(6),16. |
| MLA | Wu, Xiaoyang,et al."Seismic Azimuthal Anisotropy of Northeastern Tibetan Plateau From Ambient Noise Double Beamforming Tomography: Implications for Crustal Deformation".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 128.6(2023):16. |
入库方式： OAI收割
来源：海洋研究所
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