博士 / 國立臺灣師範大學 / 地理研究所 / 86 / Over 6000km of seismic reflection profiles collected from offshore southwestern Taiwan, three major channel systems can be identified. These channel systems show a trend of westward migration through time and the youngest channel systemis the present-day Penghu channel.The location of the Penghu channel depositsmight be related to the propagations of arc-continent collision front in Taiwan.The rapid sedimentation of the paleo-channel deposits implie that uplifting of the Taiwan mountain belt was very fast and the tectonic movement was very strong. From the seismic profiles, its reveal that about 4000~5000m thick sediments( about 3 seconds in two-way traveltime) have been deposited along sections ofpaleo-channel within last 1.6~2.0 million years. Several episoded of submarine channel erosions and depositions were observed within the thick paleo-channel deposits on seismic sections, which suggest that the uplift of Taiwan islandis intermittent. From the distance between oldest (c1) and youngest (c3) PenghuChannel System, we can find the westward migration rate of Penghu Cannel System is 20 mm per year.
| Identifer | oai:union.ndltd.org:TW/086NTNU0136038 |
| Date | January 1997 |
| Creators | TUNG Ter-huei, 董德輝 |
| Contributors | Tsai-Tien Shih, Tung-Yi Lee, 石再添, 李通藝 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 0 |
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