globalchange  > 气候变化与战略
DOI: 10.1016/j.tecto.2021.228946
论文题名:
Joint inversion of Rayleigh wave ellipticity and phase velocity for crustal structure in Taiwan
作者: Ai S.; Zheng Y.; Wang S.; He L.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2021
卷: 814
语种: 英语
中文关键词: Crustal structure ; Joint inversion ; Phase velocity ; Rayleigh wave ellipticity ; Taiwan Orogen
英文关键词: Correlation methods ; Inverse problems ; Landforms ; Particle swarm optimization (PSO) ; Phase velocity ; Plates (structural components) ; Rayleigh waves ; Seismic response ; Shear waves ; Ambient noise tomographies ; Continental crusts ; Cross correlation techniques ; Crustal structure ; Crustal thickenings ; Geophysical inverse problems ; Particle swarm optimization algorithm ; Shear wave velocity ; Shear flow ; algorithm ; continental crust ; crustal structure ; crustal thickening ; data inversion ; Eurasian plate ; lithospheric structure ; orogeny ; phase velocity ; Philippine Sea plate ; plate convergence ; Rayleigh wave ; seismic tomography ; tectonic evolution ; tectonic setting ; uplift ; wave field ; Taiwan
英文摘要: The convergence between the Eurasian Plate and the Philippine Sea Plate results in rapid uplifting of the Taiwan Orogen. To study the mountain building in Taiwan, we present three transects of shear wave velocity across the Taiwan mountain belt with joint inversion of teleseismic Rayleigh wave H/V ratios and phase velocities derived from ambient noise tomography. The Particle Swarm Optimization algorithm is introduced into the joint inversion and is proved to be an efficient tool in solving the geophysical inverse problems. In determining the H/V ratios, cross-correlation techniques are used to reduce the non-great circle effects of the Rayleigh wave packets and to correct sensor misorientations. The cross-correlation techniques improve the accuracy of the H/V measurements, especially at the short periods. The observed up-to-middle crustal thickening in the central segment of the Central Range suggests lithospheric collision tectonism, whereas the lower crustal thickening in southern segment is proposed to be related to subduction of the Eurasian continental crust. In the north, however, no crust thickening is observed. The variations of the crust architecture along the axis of the Taiwan Orogen favor a close coupling relationship between mountain building and slab interactions in the mantle. Beneath the Central Range, the twist of the fate of the Eurasian continental crust from consumption in the south to collision in the central segment is proposed to be resulted from the slab breakoff beneath central Taiwan. © 2021 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170761
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作者单位: State Key Laboratory of Geological Processes and Mineral Resources, Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan, China; University of Chinese Academy of Sciences, Beijing, China; State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China

Recommended Citation:
Ai S.,Zheng Y.,Wang S.,et al. Joint inversion of Rayleigh wave ellipticity and phase velocity for crustal structure in Taiwan[J]. Tectonophysics,2021-01-01,814
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