气候变化领域集成服务门户(CCPortal): Crustal Radial Anisotropy of the Iran Plateau Inferred From Ambient Noise Tomography

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DOI	10.1029/2020JB020236
	Crustal Radial Anisotropy of the Iran Plateau Inferred From Ambient Noise Tomography
	Movaghari R.; JavanDoloei G.; Yang Y.; Tatar M.; Sadidkhouy A.
发表日期	2021
ISSN	21699313
卷号	126 期号:4
英文摘要	This study presents a three-dimensional (3D) model of the crustal and uppermost mantle shear wave velocity and radial anisotropy beneath the Iran Plateau constructed by Rayleigh and Love waves from ambient noise. We correlate three years of continuous seismic ambient noise data recorded in 98 stations to obtain cross correlation functions. Then, we measure Rayleigh (8–60 s) and Love (8–50 s) wave dispersion curves from these cross-correlation functions to generate two-dimensional dispersion maps using a fast marching surface tomography method. Finally, we build a quasi-3D shear wave velocity and radial anisotropy model by jointly inverting Rayleigh and Love local phase velocity dispersion curves using a Bayesian Markov chain Monte Carlo inversion method. Observed radial anisotropy beneath Central Iran is weaker than adjacent areas. Negative radial anisotropy is observed in the shallow structures across our study region, which is most likely attributed to vertically aligned cracks in the upper crust. Strong positive radial anisotropy in the middle to the lower crust beneath the Zagros is imaged, which is associated with ductile shear zones in the crust. Radial anisotropy changes from positive values in the crust to negative values in the upper mantle beneath the Zagros, which may be evidence for the decoupling of the crust from the upper mantle beneath the Zagros. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	ambient noise tomography; crustal structure; radial anisotropy; Rayleigh and Love waves
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187205
作者单位	Department of Seismology, Seismological Research Center, International Institute of Earthquake Engineering and Seismology, Tehran, Iran; Department of Earth and Environmental Sciences, Macquarie University, Sydney, Australia; Department of Seismology, Institute of Geophysics, University of Tehran, Iran
推荐引用方式 GB/T 7714	Movaghari R.,JavanDoloei G.,Yang Y.,et al. Crustal Radial Anisotropy of the Iran Plateau Inferred From Ambient Noise Tomography[J],2021,126(4).
APA	Movaghari R.,JavanDoloei G.,Yang Y.,Tatar M.,&Sadidkhouy A..(2021).Crustal Radial Anisotropy of the Iran Plateau Inferred From Ambient Noise Tomography.Journal of Geophysical Research: Solid Earth,126(4).
MLA	Movaghari R.,et al."Crustal Radial Anisotropy of the Iran Plateau Inferred From Ambient Noise Tomography".Journal of Geophysical Research: Solid Earth 126.4(2021).