DOI: 10.1002/2015GL066227
论文题名: Anisotropy in the subducting slab: Observations from Philippine Sea plate events in Taiwan
作者: Chen K.H. ; Tseng Y.-L. ; Furumura T. ; Kennett B.L.N.
刊名: Geophysical Research Letters
ISSN: 0094-8351
EISSN: 1944-8082
出版年: 2015
卷: 42, 期: 23 起始页码: 10248
结束页码: 10255
语种: 英语
英文关键词: Philippine Sea plate
; shear wave splitting
; slab anisotropy
Scopus关键词: Anisotropy
; Shear waves
; Tectonics
; Clockwise rotation
; High frequency HF
; Intermediate-depth earthquakes
; Philippine seas
; Polarization patterns
; Ryukyu subduction zone
; Shear wave splitting
; Shear-wave splitting parameters
; Shear flow
; Philippine Sea plate
; S-wave
; seismic anisotropy
; seismic wave
; slab
; spreading center
; wave splitting
; Pacific Ocean
; Philippine Sea
英文摘要: In the southernmost Ryukyu subduction zone, slab-guiding behavior from intermediate-depth earthquakes is well documented with a low-frequency (<2 Hz) first P arrival followed by sustained high-frequency (3-10 Hz) wave trains. Such waves developed by propagating along a long path within the slab are expected to have high sensitivity to anisotropy within the slab. We determine shear wave splitting parameters from 178 intraplate events that are deeper than 100 km. The possible slab-anisotropy-associated polarization pattern shows the fast direction at N65°E and delay time of 0.13-0.45 s. This is stronger than the previously documented crust effect (<0.1 s), similar to the mantle wedge effect (0.28 s in average), but weaker than the upper mantle effect (1.3 s in average) in Taiwan. The fast axis reflects the fossil spreading direction of Philippine Sea plate with minor clockwise rotation due to the collision to Eurasian plate. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84953637495&doi=10.1002%2f2015GL066227&partnerID=40&md5=c438ddf5bb013e20289bfc7726175c85
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7967
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Earth Sciences, National Taiwan Normal University, Taipei, Taiwan
Recommended Citation:
Chen K.H.,Tseng Y.-L.,Furumura T.,et al. Anisotropy in the subducting slab: Observations from Philippine Sea plate events in Taiwan[J]. Geophysical Research Letters,2015-01-01,42(23).