globalchange  > 气候变化与战略
DOI: 10.1016/j.tecto.2021.229014
论文题名:
Crustal azimuthal anisotropy and deformation beneath the northeastern Tibetan Plateau and adjacent areas: Insights from receiver function analysis
作者: Zheng T.; Gao S.S.; Ding Z.; Liu K.H.; Chang L.; Fan X.; Kong F.; Yu Y.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2021
卷: 816
语种: 英语
中文关键词: Crustal deformation ; Northeastern Tibetan Plateau ; Receiver function ; Seismic anisotropy
英文关键词: Deformation ; Poisson distribution ; Azimuthal anisotropy ; Crustal deformations ; Dominant orientation ; Ne tibetan plateaux ; Northeastern tibetan plateaux ; Receiver function analysis ; S-receiver functions ; Spatial variations ; Anisotropy
英文摘要: We present crustal azimuthal anisotropy measurements at 246 stations by fitting the sinusoidal moveout of P-to-S receiver functions to infer crustal deformation field in the northeastern (NE) Tibetan Plateau and adjacent areas. The dominant orientation of the observed crustal anisotropy shows a systematic spatial variation: NW-SE in the NE Tibetan Plateau and western Alxa Block, nearly NE-SW in the eastern Alxa Block and Yinchuan-Hetao Graben, and E-W in the eastern portion of the Western Qinling Terrane. The magnitude of crustal anisotropy varies from 0.15 to 0.75 s with an average of 0.36 ± 0.11 s. Fault parallel crustal anisotropy with large magnitudes observed in the NE Tibetan Plateau provides independent constraints on the lateral extent of the deformation zone associated with the faults. The observed spatial distribution of crustal anisotropy, when combined with previous crustal velocity and Poisson's ratio measurements, implies that channel flow in the middle-to-lower crust is unlikely to exist beneath the NE Tibetan Plateau. The main characteristics of crustal anisotropy observed in the western Alxa Block are similar to areas affected by the Indo-Eurasian collision, while those observed in the eastern Alxa Block are comparable to the stable North China Craton. © 2021 Elsevier B.V.
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被引频次[WOS]:10   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170947
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作者单位: College of Transportation Science and Engineering, Nanjing Tech University, Nanjing, 210009, China; Geology and Geophysics Program, Missouri University of Science and Technology, Rolla, MO 65409, United States; Institute of Geophysics, China Earthquake Administration, Beijing, 100081, China; Second Institute of Oceanography, State Oceanic Administration & Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012, China; State Key Laboratory of Marine Geology, Tongji University, Shanghai, 200092, China

Recommended Citation:
Zheng T.,Gao S.S.,Ding Z.,et al. Crustal azimuthal anisotropy and deformation beneath the northeastern Tibetan Plateau and adjacent areas: Insights from receiver function analysis[J]. Tectonophysics,2021-01-01,816
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