Moho Depth and Crustal Structure across the Chaochou Fault, South of Taiwan from Teleseismic Receiver Functions
Abstract
The Chaochou Fault (CF) is a significant fault for the geological system in the southern Taiwan. We applied the Common Conversion Point (CCP) stacking technique which was developed by Zhu [2000] on the teleseismic radial receiver functions (RFs) and imaged the variation of Moho depth and crustal structure across the CF. In the Eurasia Plate (EP), the Moho depth is about 37 km and subducted to the Philippine Sea Plate (PSP) with about 30 degrees (until about 50 km) beneath the boundary between the Backbone Belt (BB) and the Tananao Schist (TS). In the PSP, the Moho depth is about 17 km and the Longitudinal Valley (LV) formed a collision boundary between the EP and the PSP. From our results, we suggest the depth extent of the CF was probably between 30~35 km and the CF became more even than it was on the part near the free surface like a “high-angle detachment fault”. There are some bended interfaces of velocity contrast within the crust and we suggest a simple model to explain the process of these deformations.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2009
- Bibcode:
- 2009AGUFM.T41B2007T
- Keywords:
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- 8123 TECTONOPHYSICS / Dynamics: seismotectonics