HR: 0800h
AN: T11D-1305    [Abstracts]
TI: Active fault (Liouchia fault) and related Holocene deformation along the frontal foothills, southwestern Taiwan
AU: * Yang, C B
EM: d91224003@ntu.edu.tw
AF: Department of Geosciences, National Taiwan University, No.1, Roosevelt Rd., Sec. 4,, Tapei, 106 Taiwan
AU: Yen, I
EM: yic1228@ms17.hinet.net
AF: Department of Geosciences, National Taiwan University, No.1, Roosevelt Rd., Sec. 4,, Tapei, 106 Taiwan
AU: Huang, N
EM: r86224108@ms86.ntu.edu.tw
AF: Department of Geosciences, National Taiwan University, No.1, Roosevelt Rd., Sec. 4,, Tapei, 106 Taiwan
AU: Chen, W
EM: wenshan@ntu.edu.tw
AF: Department of Geosciences, National Taiwan University, No.1, Roosevelt Rd., Sec. 4,, Tapei, 106 Taiwan
AU: Lin, C
EM: lincw@linx.moeacgs.gov.tw
AF: CENTRAL GEOLOGICAL SURVEY, MOEA, 2, Lane 109, Hua-Hsin Street, Chung-Ho, Taipei, 235 Taiwan
AB: Fold-and-thrust belt of Taiwan is a neotectonic entity in response to on-going arc-continent collision occurring in western Taiwan. To figure out the fault geometry and kinematics is of great importance when we consider the hazard assessment in such a highly populated area. In southwestern Taiwan, the Liouchia fault bounds the foothills and the Chianan Coastal Plain. The frontal foothills display a clear lineation scarp facing to the west, which is trending NNE-SSW with a length of 17 km located on the forelimb of the Nioushan anticline. The anticline has been interpreted as hangingwall fold associated with the fault ramp of the frontal thrust. Holocene marine terrace (radiocarbon age: 9559-10147 yr BP) unconformably overlain the late Pleistocene strata on the hangingwall. The synchronous marine sediments are deposited underneath the Coastal Plain about 43-m-depth on the footwall. Based on the measurement of vertical displacement in both sides of the fault, it is obtained 4.7 mm/yr of uplifted rate on the up-throwing block.
DE: 9320 Asia
DE: 9604 Cenozoic
DE: 8005 Folds and folding
DE: 8107 Continental neotectonics
DE: 1744 Tectonophysics
SC: Tectonophysics [T]
MN: 2004 AGU Fall Meeting