碩士 / 國立臺灣大學 / 海洋研究所 / 100 / Transtensional fault is a common geological structure around the world with many earthquakes occurs upon, so it is important to understand the structure and kinematics of transtensional faults. Tectonic of transtensional basin deformed in strike-slip settings overland have been described by many authors, but the field outcrop could be destroyed by Weathering and made the tectonic features incomplete. Chishan fault is an active strike-slip fault that located at Kaohsiung in the Southwestern Taiwan. This left-lateral strike-slip fault extends to shelf break and stop, with a transtensional basin at the termination. The transtensional basin has stopped extending to open sea, whereas it is spreading toward the inshore area. Therefore, we can know that a young extensional activity is developing at the offshore seabed of Tso-Ying Naval Port and the activity is relative to the transtension of left-lateral fault. In this study, we want to figure out the tectonic of transtensional basin at Chi-Shan fault and further discuss the kinematics about termination of strike-slip faults. By using the multibeam bathymetry data, we could initially understand the terrain features. Then, we use the 3.5-kHz sub-bottom profiler data to understand the subsurface structure of the normal faults, arc listric normal faults and the curved area between the listric faults. Finally, we illustrate a diagram for the incremental strain associated with simple-shear deformation and conjecture the mode of motion in the research area. We can figure out the evolution of the tectonic features in research area by 3D topography. The way that transtensional basin developed at continental slope of southwestern Taiwan is a structure of strike-slip fault termination and it is different from general left-lateral faults.
| Identifer | oai:union.ndltd.org:TW/100NTU05279030 |
| Date | January 2012 |
| Creators | Hung-Chiun Chou, 周泓群 |
| Contributors | 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 | 80 |
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