Crustal Deformation Revealed from Persistent Scatterer Inteferometry in SW Taiwan
Abstract
Recently Differential Interferometric Synthetic Aperture Radar (D-InSAR) technique applied in geosciences is considered as a powerful tool. The rapid and precise data provide us monitoring ground deformations continually. Thus the active orogeny of Taiwan provides key examples for analyzing tectonic displacements through Interferometric methods. The new Persistent Scatterers Interferometry method is herein applied in order to better understand deformations through time. This allows to know the deformations of thousands points through recent time. As a consequence, this can better map the deformation field due to the active tectonics. We use an advanced differential interferometic processing technique developed at Altamira Information. It has quite improved the precision of data by using stable point-wise targets. With this we can overcome the drawbacks of complex area, and gain the information of mountain deformations. For instance differential PS-InSAR deduced from 1995-2000 time period were processed in the SW part of Taiwan. We combine with morphostructural analysis applied on study area, situated within a compressive regime, it reveals part of the deformation field of an active elongated anticline close to the deformation front. Furtheremore, the Chishan fault is one of major faults in the Western Foothills fold and thrust belt of southern Taiwan was documented as a suspect active fault. In previous studies, the kinematics of the fault was documented as a different kind of claim; one consider as left-slip fault, and another entertain that was a thrust fault with right- lateral movement, and even the other argue both left and right movement can be developed. Therefore, by taking advantage of PS-InSAR to find out the characteristics of the Chishan fault can provide us an advantageous mechanism of Chishan fault.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2006
- Bibcode:
- 2006AGUFM.T33D0535T
- Keywords:
-
- 1209 Tectonic deformation (6924);
- 1240 Satellite geodesy: results (6929;
- 7215;
- 7230;
- 7240);
- 6924 Interferometry (1207;
- 1209;
- 1242)