Onshore/Offshore Wide-Angle Deep Seismic Profiling in Taiwan

Yeh, Yung‐Hui; Shih, Ruey-Chyuan; Lin, Cheng‐Horng; Liu, C. C.; Yen, Horng Yuan; Huang, Bor-Shouh; Liu, C. S.; Chen, P. Z.; Huang, Chun-Ming; Wu, Chunquan; Wu, Francis T.

doi:10.3319/tao.1998.9.3.301(taicrust)

Cited by 49 publications

(59 citation statements)

References 12 publications

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“…TAICRUST, was carried out in 1995 (e.g., Shih et al, 1998;Yeh et al, 1998;and McIntosh et al, 2005). Although it was a fruitful experiment, owing to the active sources (air guns) mainly from the eastern areas offshore of Taiwan, the depth resolution was limited to above 20-30 km (McIntosh et al, 2005).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Crustal structures from the Wuyi-Yunkai orogen to the Taiwan orogen: The onshore-offshore wide-angle seismic experiments of the TAIGER and ATSEE projects

et al. 2016

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Section: Accepted Manuscriptmentioning

confidence: 99%

Crustal structures from the Wuyi-Yunkai orogen to the Taiwan orogen: The onshore-offshore wide-angle seismic experiments of the TAIGER and ATSEE projects

et al. 2016

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“…2) and (2) the arrival times of P-and S-waves generated by earthquakes occurring in the vicinity of Taiwan. Air-gun sources were released by the R/V Maurice Ewing on the southeastern offshore area of Taiwan in September 1995 (e.g., Yeh et al, 1998) and recorded by the CWBSN stations in subarea D. In addition, the air-gun signals recorded by an ocean bottom seismometer (OBS) (Chen and Nakamura, 1998) were also included in the data set for the 3-D inversion. A study of the crustal structure using air-gun and earthquake data in subarea D can provide us with a detailed velocity model from shallow to deeper crust that permits us to study the crustal deformation associated with the transition from subduction to collision.…”

Section: Traveltime Datamentioning

confidence: 99%

Crustal structure of the convergent plate-boundary zone, eastern Taiwan, assessed by seismic tomography

Cheng¹,

Wang²,

Shyu³

et al. 2002

Geology and Geophysics of an Arc-Continent Collision, Taiwan

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The three-dimensional P-wave velocity structure of the obliquely convergent zone in the eastern Taiwan area has been determined by using traveltimes of seismic waves from 1826 local earthquakes and air-gun shots recorded by the Central Weather Bureau Seismographic Network, and 8334 earthquakes have been relocated for better understanding of the current tectonics. The possible location of the plate boundary between the Eurasian and Philippine Sea plates, characterized by a sharp gradient in the velocity structure, is found beneath the eastern flank of the Central Range to the north of 23.5ЊN, eastern Taiwan. To the south of 23.5ЊN, this boundary is generally along the Longitudinal Valley fault and its southern projection. The distribution of the relocated earthquakes also shows a spatial pattern closely related to the boundary and the state of plate collision. To the east of the boundary, a prominent high-velocity anomaly in the middle to lower crust is found beneath the Longitudinal Valley and the Coastal Range in eastern Taiwan; this anomaly could be interpreted as the oceanic crust of the Luzon forearc. To the west of the boundary, the Central Range has a relatively low velocity at the same depth. The velocity structure and relocated seismicity have led to the recognition of interaction between the materials on opposite sides of the boundary. The relatively high P-wave velocity of the Luzon forearc suggests that it can accumulate strain energy and then release it as brittle failure. However, the relatively low P-wave velocity of the Central Range implies that it responds to the convergence by silent or ductile deformation.

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“…This fact, together with other geophysical evidence, led Wu et al (1997) to argue that the Taiwan orogeny was the result of lithospheric thickening instead of thin-skinned tectonics. Recent studies on wide-angle deep seismic profiling suggested significant crustal thickening in both the Eurasian plate and the Philippine Sea plate near the suture zone (e.g., Shih et al, 1998;Yeh et al, 1998), which is inconsistent with the thin-skinned model.…”

Section: Tectonic Setting Of Taiwanmentioning

confidence: 93%

Synorogenic extension, Taiwan: Implications of physical and numerical modeling

Wang¹,

Hung²

2002

Geology and Geophysics of an Arc-Continent Collision, Taiwan

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We conducted two-dimensional physical and numerical modeling to simulate the synorogenic extension in the Taiwan mountain belt that is created by the collision between the Eurasian and the Philippine Sea plates at the Chinese continental margin. Our results show that crustal extension may occur around the crest of the Central Range because of gravitational spreading. Accompanying the extension, active thrust belts appear on either side of this extensional area. Overprinting of late-stage normal faults onto early-stage compressional structures on the east flank of the Central Range may result either from changes in the stress field near the mountain crest at various stages of the mountain-building event or from west to east compression at depth and tension near the surface. The concentration of normal faulting on the east flank of the Central Range suggests that the mantle suture between the Philippine Sea plate and the Eurasian plate might be farther west than the Longitudinal Valley. Unlike the hypothesis of mountain collapse, implying an overall reduction of elevation, our model shows that the synorogenic extension bounded by active thrust belts appears in the area undergoing fast surface uplift, as observed in Taiwan.

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Onshore/Offshore Wide-Angle Deep Seismic Profiling in Taiwan

Cited by 49 publications

References 12 publications

Crustal structures from the Wuyi-Yunkai orogen to the Taiwan orogen: The onshore-offshore wide-angle seismic experiments of the TAIGER and ATSEE projects

Crustal structures from the Wuyi-Yunkai orogen to the Taiwan orogen: The onshore-offshore wide-angle seismic experiments of the TAIGER and ATSEE projects

Crustal structure of the convergent plate-boundary zone, eastern Taiwan, assessed by seismic tomography

Synorogenic extension, Taiwan: Implications of physical and numerical modeling

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