Crustal and upper mantle S-wave velocity structures across the Taiwan Strait from ambient seismic noise and teleseismic Rayleigh wave analyses

NCUIR > College of Earth Sciences > Department of Earth Sciences > journal & Dissertation > Item 987654321/103463

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/103463

Title:	Crustal and upper mantle S-wave velocity structures across the Taiwan Strait from ambient seismic noise and teleseismic Rayleigh wave analyses
Authors:	温國樑;Huang, Yu-Chih;Yao, Huajian;Wu, Francis T.;Liang, Wen-Tzong;Huang, Bor-Shouh;Lin, Cheng-Horng;Wen, Kuo-Liang
Contributors:	地球科學學院地球科學學系
Keywords:	Ambient seismic noise;Crust and upper mantle;S-wave velocity structure;Surface wave two-station method;Taiwan Strait
Date:	2014-02-25
Issue Date:	2026-04-23 11:30:59 (UTC+8)
Publisher:	Elsevier Ltd.;Elsevier Ltd
Abstract:	摘要： •Resolving 1-D crustal and upper mantle Vs structures across the Taiwan Strait.•Rayleigh wave phase velocity dispersion curves derived by combining two methods.•The significant differences of the Vs structures are in the shallow crust.•The overall crustal thickness is approximately 30km. Although orogeny tapers off in western Taiwan large and small earthquakes do occur in the Taiwan Strait, a region largely untouched in previous studies owing mostly to logistical reasons. But the overall crustal structure of this region is of particular interest as it may provide a hint of the proto-Taiwan before the orogeny. By combining time domain empirical Green’s function (TDEGF) from ambient seismic noise using station-pairs and traditional surface wave two-station method (TS) we are able to construct Rayleigh wave phase velocity dispersion curves between 5 and 120s. Using Broadband Array in Taiwan for Seismology (BATS) stations in Taiwan and in and across the Strait we are able to derive average 1-D Vs structures in different parts of this region. The results show significant shear velocity differences in the upper 15km crust as expected. In general, the highest Vs in the upper crust observed in the coastal area of Mainland China and the lowest Vs appears along the southwest offshore of the Taiwan Island; they differ by about 0.6–1.1km/s. For different parts of the Strait, the upper crust Vs structures are lower in the middle by about 0.1–0.2km/s relative to those in the northern and southern parts. The upper mantle Vs structure (Moho – 150km) beneath the Taiwan Strait is about 0.1–0.3km/s lower than the AK135 model. The overall crustal thickness is approximately 30km, much thinner and less variable than under the Taiwan Island. The inversion of seismic velocity structures using shorter period band dispersion data in the sea areas with water depth deeper than 1000m should take water layer into consideration except for the continental shelves. 出版者： Elsevier Ltd 出版日期： 2014-02-25 出處： Journal of Asian earth sciences, 2014-02, Vol.81, p.38-52 資源來源： ScienceDirect (Elsevier) Journals 版權： 2013 Elsevier Ltd 識別號： ISSN: 1367-9120 識別號： EISSN: 1878-5786 識別號： DOI: 10.1016/j.jseaes.2013.11.023
Appears in Collections:	[Department of Earth Sciences ] journal & Dissertation

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	10	View/Open

社群 sharing

Loading...