气候变化领域集成服务门户(CCPortal): High-Resolution 3-D Shear Wave Velocity Model of Northern Taiwan via Bayesian Joint Inversion of Rayleigh Wave Ellipticity and Phase Velocity With Formosa Array

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DOI	10.1029/2020JB021610
	High-Resolution 3-D Shear Wave Velocity Model of Northern Taiwan via Bayesian Joint Inversion of Rayleigh Wave Ellipticity and Phase Velocity With Formosa Array
	Liu C.-N.; Lin F.-C.; Huang H.-H.; Wang Y.; Berg E.M.; Lin C.-H.
发表日期	2021
ISSN	21699313
卷号	126 期号:5
英文摘要	The Formosa array, with 137 broadband seismometers and ∼5 km station spacing, was deployed recently in Northern Taiwan. Here by using eight months of continuous ambient noise records, we construct the first high-resolution three-dimensional (3-D) shear wave velocity model of the crust in the area. We first calculate multi-component cross-correlations to extract robust Rayleigh wave signals. We then determine phase velocity maps between 3 and 10 s periods using Eikonal tomography and measure Rayleigh wave ellipticity at each station location between 2 and 13 s periods. For each location, we jointly invert the two types of Rayleigh wave measurements with a Bayesian-based inversion method for a one-dimensional shear wave velocity model. All piecewise continuous one-dimensional models are then used to construct the final 3-D model. Our 3-D model reveals upper crustal structures that correlate well with surface geological features. Near the surface, the model delineates the low-velocity Taipei and Ilan Basins from the adjacent fast-velocity mountainous areas, with basin geometries consistent with the results of previous geophysical exploration and geological studies. At a greater depth, low velocity anomalies are observed associated with the Linkou Tableland, Tatun Volcano Group, and a possible dyke intrusion beneath the Southern Ilan Basin. The model also provides new geometrical constraints on the major active fault systems in the area, which are important to understand the basin formation, orogeny dynamics, and regional seismic hazard. The new 3-D shear wave velocity model allows a comprehensive investigation of shallow geologic structures in the Northern Taiwan. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Ambient noise tomography; Bayesian inversion; phase velocity; Rayleigh wave ellipticity; Taiwan
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/187145
作者单位	Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan; Department of Geology and Geophysics, University of Utah, Salt Lake City, UT, United States; Department of Geosciences, National Taiwan University, Taipei, Taiwan
推荐引用方式 GB/T 7714	Liu C.-N.,Lin F.-C.,Huang H.-H.,et al. High-Resolution 3-D Shear Wave Velocity Model of Northern Taiwan via Bayesian Joint Inversion of Rayleigh Wave Ellipticity and Phase Velocity With Formosa Array[J],2021,126(5).
APA	Liu C.-N.,Lin F.-C.,Huang H.-H.,Wang Y.,Berg E.M.,&Lin C.-H..(2021).High-Resolution 3-D Shear Wave Velocity Model of Northern Taiwan via Bayesian Joint Inversion of Rayleigh Wave Ellipticity and Phase Velocity With Formosa Array.Journal of Geophysical Research: Solid Earth,126(5).
MLA	Liu C.-N.,et al."High-Resolution 3-D Shear Wave Velocity Model of Northern Taiwan via Bayesian Joint Inversion of Rayleigh Wave Ellipticity and Phase Velocity With Formosa Array".Journal of Geophysical Research: Solid Earth 126.5(2021).