Presenter: Yi-Ming Shie
Date: 2016/10/06
Abstract
Numerous landforms along the Longitudinal Valley suture of eastern Taiwan indicate that two opposing reverse faults currently dominate the suturing process between the Luzon volcanic arc and the Central Range of Taiwan. The east-dipping Longitudinal Valley fault, on the eastern flank of the valley, is well known. The west- dipping Central Range reverse fault, on the western flank of the valley, is more obscure. Nonetheless, it has produced many uplifted lateritic fluvial terraces and earthquake along the eastern flank of the Central Range in the valley, from just north of the Wuhe Tableland to near taitung. The fault appears to be active but blind south of taituang and inactive along the northern part of the Longitudinal Valley. This suggests that localized brittle slip along the Central Range fault is an important component of crustal thickening and uplift of the range, even though additional shortening and crustal thickening may be occurring because of pervasive deformation beneath the range.
Reference
Wu, Y.M., Chen, Y.G., Chang, C.H, 2006. Seismogenic structure in a tectonic suture zone: With new constraints from 2006 Mw6.1 Taitung earthquake.
Shyu, J. Bruce H., Chen, Y.G., Chung, L.H., 2006. Geomorphic analysis of the Central Range fault, the second major active structure of the Longitudinal Valley suture, eastern Taiwan