Seismic Azimuthal Anisotropy of Northeastern Tibetan Plateau From Ambient Noise Double Beamforming Tomography: Implications for Crustal Deformation

doi:10.1029/2022JB026109

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋地质与环境重点实验室

	Seismic Azimuthal Anisotropy of Northeastern Tibetan Plateau From Ambient Noise Double Beamforming Tomography: Implications for Crustal Deformation
	Wu, Xiaoyang 3,4; Guo, Zhen 1,3; Li, Shilin 3; Yu, Yong 3; Bai, Qipeng 2; Chen, Yongshun John 3
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
	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.
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关键词	SURFACE-WAVE TOMOGRAPHY ; LOW-VELOCITY ZONE ; MANTLE DEFORMATION ; RADIAL ANISOTROPY ; CROSS-CORRELATION ; QILIAN-SHAN ; BENEATH ; EASTERN ; INVERSION ; EVOLUTION
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000999811800001
内容类型	期刊论文
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.Shanghai Sheshan Natl Geophys Observ & Res Stn, Shanghai, Peoples R China 2.Southern Univ Sci & Technol, Acad Adv Interdisciplinary Studies, Shenzhen, Peoples R China 3.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen, Peoples R China 4.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao, 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.