碩士 / 國立臺灣海洋大學 / 應用地球科學研究所 / 99 / The study area is located in southwestern Taiwan, using TAIGER Leg 1 obs data. The line MGL0905_27 (total of 247 km) was shot by the U.S. R/V Langseth. Besides the OBS the survey also collected the Multi-Channel seismic data、gravity and Multibeam echo sounding data. The line direction is from Southwest to Northeast, across to South China Sea, Manila Trench, and accretionary prsim. The study use TOMO2D method to make refraction model, and combine with the gravity、and earthquake data , The results show the South China Sea is the oceanic crust (about 10-15 km thick). From the Manila Trench down to the subduction zone, the crust increases to about 25 km. The subduction and collision are believed to be the major tectonic processes of this area, From the earthquake data, it shows that at the subduction zone of the Benioff zone can be extended up to 100 km. The Overlapping Off-Sequence Fault and the Splay Fault are the products of upper crust subduction and collision process. If the stress is accumulation over a long time, the mega earthquake and tsunami can be occurred.
| Identifer | oai:union.ndltd.org:TW/099NTOU5135009 |
| Date | January 2011 |
| Creators | Hung-Ming Chen, 陳鴻明 |
| Contributors | Chao-Shing Lee, 李昭興 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 52 |
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