碩士 / 國立中央大學 / 地球科學學系 / 103 / The offshore area of the southwest Taiwan is located in the oblique convergence zone between the northern continental margin of South China Sea and the Manila accretionary wedge. To the west of the deformation front offshore southwestern Taiwan, the Pointer Ridge is located in the South China Sea passive continental margin. The continental margin is compose of extensional horst-and-graben structures. There are numerous submarine channels and linear ridge, formed due to the submarine erosion across the continental slope region. According to geophysical research off SW Taiwan, potential gas hydrate may exist. In this study, our purpose is to study the relationship between the near-seafloor structures of the Pointer Ridge and the gas hydrate formation off SW Taiwan.
The data used in this study include side-scan sonar（SSS）, sub-bottom profiler（SBP）, echo sounder system（EK60）and the multi-channel reflection seismic（MCS）data. Our results show that pockmarks and gas seepage structures mainly appear in the place where the gradient of the BSR thickness is maximum. Those sites also show authigenic carbonate signature in the sub-bottom profiler. We also observe several folds and faults structures in this extensional background; however, these compressional features need further studies.
| Identifer | oai:union.ndltd.org:TW/103NCU05134021 |
| Date | January 2015 |
| Creators | Hsueh-fen Wang, 王雪芬 |
| Contributors | Shu-Kun Hsu, 許樹坤 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 128 |
Page generated in 0.0204 seconds