碩士 / 國立臺灣大學 / 海洋研究所 / 102 / In geological point of view, deformation front separates two different regions received unlike stress. In Taiwan, the region west of the deformation front is impacted by extensional force. In the other hand, east of the deformation front is impacted by contractional force. The deformation front is defined as the frontal boundary of Taiwan western foothills. In other words, it is the westernmost limit thrust fault in Taiwan orogenic belt. According to the previous studies, they connect the extension line of Manila Trench north forward until Tainan offshore, then toward Taiwan. But now, there is lack for high-resolution nearshore data. Therefore, we need to be more rigorous discussion of the result.
This study investigated area is located in Tainan offshore, modern topographic map cannot be seen any deformation front geomorphological features in the region. This is because of more rugged terrain outside the edge of the continental shelf. And on the shelf due to the lack of detailed bathymetric data drawn topographic map shows the regional sea-bed water depth of 140 meters or less, is very flat. However, some unpublished data shows that can be observed in the nearshore seabed some obvious linear collapse with the seabed, can also see local small cone topography, seismic profiles can also be observed in the formation, there are some horizontal movement of the deposited layer of the high water content, these the small tapered terrain is the product of these high water content of sediment removed upwardly. Therefore, we can assert that, in the the Tainan coast of the sea bed, is under the influence of forces, these forces will affect the very shallow surface of the sea-bed sediments, easily can be observed from the stress state of the sea bed sedimentsout whether there is a so-called fault deformation front after.
| Identifer | oai:union.ndltd.org:TW/102NTU05279003 |
| Date | January 2013 |
| Creators | Jhao-Yu Chen, 陳昭瑜 |
| Contributors | Gwo-Shyh Song, 宋國士 |
| 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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