Structure and Motion of the Southwestern Taiwan Fold and Thrust Belt
Jian-Hong Chen
Abstract
The cross sections across the southwestern Taiwan Fold and Thrust Belt can be constructed by using reflection seismic profiles. The Chukou-Lunhou fault is the most significant fault in the internal foothill. Available data indicate that the frontal structure may be composed of reactivated normal faults in the north and triangle zones in the south. The Kuantzuling anticline in the southern part is the main structural rise of the area .
After carefully examining the seismic data, we find that
1) A lot of pre-Miocene strata were involved in the deformation.
2) Pre-existing normal faults and basement highs change the trajectory of thrust ramps and become the transverse faults in the south of Chiayi.
3) The thick stratigraphic sequence was compressed to become duplex wedges, which pushed folds developing above them.
4) The most western fold’s front edge becomes the axis where the Muchiliaw and Liuchia faults located.
References
Jih-Hao Hung , David V , 1999 Structure and Motion of the Southwestern Taiwan Fold and Thrust Belt. TAO, vol. 10, NO.3, 543-568
陳郁文，2006。以反射震測法研究觸口斷層及其附近構造，國立中央大學碩士論文。
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