Anisotropy beneath an active collision orogen of Taiwan: Results from across islands array observations

Bor Shouh Huang, Win Gee Huang, Wen Tzong Liang, Ruey Juin Rau, Naoshi Hirata

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

We examined shear wave splitting in SKS phases from a large event recorded by a temporary array across southern Taiwan. The span extends from the western plain to the east coast. We applied particle motion and cross correlation methods to estimate its polarization directions and delay times. Analysis shows clear evidence of splitting except stations on the east coast. The fast split-shear wave along this transect are approximately parallel to the strike of the mountain belt (NE-SW). The delay times show a shortwavelength variation and are well correlated to the surface geology. The largest split time is about 1.6 sec located at Eastern Central Mountain Range and indicates its possible mantle origin. Implications suggest that anisotropy is related to the collision tectonics which built the Taiwan islands, and that this tectonic compression involved the lithosphere and is characterized by a strong coherent deformation of the upper mantle and the crust.

Original languageEnglish
Article numberL24302
JournalGeophysical Research Letters
Volume33
Issue number24
DOIs
Publication statusPublished - 2006 Dec 28

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Taiwan
coasts
mountains
S waves
tectonics
Earth mantle
anisotropy
time lag
collision
collisions
S-wave
particle motion
geology
plains
lithosphere
cross correlation
crusts
wave splitting
stations
coast

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

Huang, Bor Shouh ; Huang, Win Gee ; Liang, Wen Tzong ; Rau, Ruey Juin ; Hirata, Naoshi. / Anisotropy beneath an active collision orogen of Taiwan : Results from across islands array observations. In: Geophysical Research Letters. 2006 ; Vol. 33, No. 24.
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Anisotropy beneath an active collision orogen of Taiwan : Results from across islands array observations. / Huang, Bor Shouh; Huang, Win Gee; Liang, Wen Tzong; Rau, Ruey Juin; Hirata, Naoshi.

In: Geophysical Research Letters, Vol. 33, No. 24, L24302, 28.12.2006.

Research output: Contribution to journalArticle

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