Linking between the pre-existing normal faults system with the active faults underneath the Chianan coastal plain, SW Taiwan

Many pre-existing E-W trending normal faults have been documented in southwestern Taiwan. Some of these may currently be reactivated as strike-slip structures. Such as the Meishan fault, which ruptured in the 1906 earthquake, is a major strike-slip fault within the study area of SW Taiwan. For instance, the Kukeng fault, Yichu fault and the Hsinhua fault may be the reactivated faults that contribute to the irregular shape of the frontal foothills. Densely seismic profiles from CPC indicated that two major south dipping pre-existing E-W trending normal faults(A & B faults) which with lot of antithetic north dipping faults underneath the Chianan coastal plain. The Yichu and Kukeng faults are correlated with the A and B faults, respectively. On the other hand, the Meishan and Hsinhua faults are probably correlated with the pre-existing antithetic north dipping faults. Detail mapping the pre-existing normal faults underneath the Chianan coastal plain will help us to figure out the neotectonic features in the frontal Taiwan Orogeny.