气候变化领域集成服务门户(CCPortal): Crustal azimuthal anisotropy and deformation beneath the northeastern Tibetan Plateau and adjacent areas: Insights from receiver function analysis

CCPortal

DOI	10.1016/j.tecto.2021.229014
	Crustal azimuthal anisotropy and deformation beneath the northeastern Tibetan Plateau and adjacent areas: Insights from receiver function analysis
	Zheng T.; Gao S.S.; Ding Z.; Liu K.H.; Chang L.; Fan X.; Kong F.; Yu Y.
发表日期	2021
ISSN	00401951
卷号	816
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.
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
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/208121
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
推荐引用方式 GB/T 7714	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],2021,816.
APA	Zheng T..,Gao S.S..,Ding Z..,Liu K.H..,Chang L..,...&Yu Y..(2021).Crustal azimuthal anisotropy and deformation beneath the northeastern Tibetan Plateau and adjacent areas: Insights from receiver function analysis.Tectonophysics,816.
MLA	Zheng T.,et al."Crustal azimuthal anisotropy and deformation beneath the northeastern Tibetan Plateau and adjacent areas: Insights from receiver function analysis".Tectonophysics 816(2021).