HR: 0800h
AN: T41B-1309    [Abstracts]
TI: Active Deformation of Tainan Tableland of Southwestern Taiwan Based on Geodetic Measurements and SAR Interferometry
AU: Huang, M
EM: r93224213@gmail.com
AF: Department of Geosciences, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan, Taipei, 106 Taiwan
AU: Hu, J
EM: jchu@ntu.edu.tw
AF: Department of Geosciences, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan, Taipei, 106 Taiwan
AU: Hsieh, C
EM: shawn.cv89g@nctu.edu.
AF: Department of Civil Engineering, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu, 300 Taiwan
AU: * Chen, H
EM: l4890102@ccmail.ncku.edu.tw
AF: Department of Earth Sciences, National Cheng Kung University, No.1, Ta-Hsueh Road, Tainan, 701 Taiwan
AU: Rau, R
EM: raurj@mail.ncku.edu.tw
AF: Department of Earth Sciences, National Cheng Kung University, No.1, Ta-Hsueh Road, Tainan, 701 Taiwan
AB: We apply the D-InSAR (Differential-InSAR) technique to investigate active uplift of the Tainan Tableland in southwestern Taiwan. Tainan Tableland is located in-between a blind fault in the west and the Houchiali Fault in the east, thus the Tainan Tableland is interpreted as a pop-up structure in a fold-thrust belt at active tectonic margin near the deformation front. Interferometric processing of six SAR images reveals the average uplift rate of ~12.5 mm/yr along the radar line of sight toward the satellite in Tainan Tableland during the period of 1996-2000. The result shows the uplift increases from west edge of Tainan Tableland and decreases across the Houchiali fault. Analysis of GPS compaign data set form 1999 to 2003, together with the data of eight continuous GPS data in the surrounding area, indicates a horizontal movement of ~12 mm/yr in the direction of N44W for the Tainan Tableland with respect to west coast. Furthermore five precise leveling surveys across Tainan Tableland over a period of two years indicate an uplift rate of ~11 mm/yr for the benchmarks on the Tableland. The large Tainan city is located in an active deformation zone, thus the seismic hazard assessment is crucial. The further works will be concentrated by using 3-D dislocation model for understanding the subsurface fault geometry, locking depth and slip rate along the fault surface. With empirical relations between rupture area and earthquake magnitude, we can thus assess the seismic hazard in study area.
DE: 1209 Tectonic deformation (6924)
DE: 6924 Interferometry (1207, 1209, 1242)
DE: 8123 Dynamics: seismotectonics
SC: Tectonophysics [T]
MN: Fall Meeting 2005