Research output: Contribution to journal › Article › peer-review
Three-dimensional seismic anisotropy in the crust and uppermost mantle beneath the Taiwan area revealed by passive source tomography. / Koulakov, Ivan; Jakovlev, Andrey; Wu, Yih Min et al.
In: Journal of Geophysical Research: Solid Earth, Vol. 120, No. 11, 11.2015, p. 7814-7829.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Three-dimensional seismic anisotropy in the crust and uppermost mantle beneath the Taiwan area revealed by passive source tomography
AU - Koulakov, Ivan
AU - Jakovlev, Andrey
AU - Wu, Yih Min
AU - Dobretsov, Nikolay L.
AU - El Khrepy, Sami
AU - Al-Arifi, Nassir
PY - 2015/11
Y1 - 2015/11
N2 - We present a 3-D anisotropic seismic model of the crust and uppermost mantle beneath the Taiwan region based on the tomographic inversion of traveltime data from regional earthquakes. In the crust beneath eastern Taiwan, we observe coast-parallel anisotropy that perfectly delineates the major geological structures. In westernmost Taiwan, we distinguish a crustal block corresponding to the Peikang High at the margin of the Eurasian Plate, where coast-perpendicular anisotropy within a high-velocity anomaly is observed. In the uppermost mantle, the direction of anisotropy beneath central Taiwan turns perpendicular to the coast, which may indicate eastward underthrusting of the Peikang Block that was induced by collisional processes. To the NE of Taiwan, the anisotropy forms circular patterns coinciding with the shape of the Ryukyu arc, which may reflect the distribution of the deformations and fractures in the accretion and arc complex.
AB - We present a 3-D anisotropic seismic model of the crust and uppermost mantle beneath the Taiwan region based on the tomographic inversion of traveltime data from regional earthquakes. In the crust beneath eastern Taiwan, we observe coast-parallel anisotropy that perfectly delineates the major geological structures. In westernmost Taiwan, we distinguish a crustal block corresponding to the Peikang High at the margin of the Eurasian Plate, where coast-perpendicular anisotropy within a high-velocity anomaly is observed. In the uppermost mantle, the direction of anisotropy beneath central Taiwan turns perpendicular to the coast, which may indicate eastward underthrusting of the Peikang Block that was induced by collisional processes. To the NE of Taiwan, the anisotropy forms circular patterns coinciding with the shape of the Ryukyu arc, which may reflect the distribution of the deformations and fractures in the accretion and arc complex.
KW - anisotropy
KW - collision
KW - seismic tomography
KW - Taiwan
UR - http://www.scopus.com/inward/record.url?scp=84954411669&partnerID=8YFLogxK
U2 - 10.1002/2015JB012408
DO - 10.1002/2015JB012408
M3 - Article
AN - SCOPUS:84954411669
VL - 120
SP - 7814
EP - 7829
JO - Journal of Geophysical Research: Solid Earth
JF - Journal of Geophysical Research: Solid Earth
SN - 2169-9313
IS - 11
ER -
ID: 25480479