碩士 / 國立中央大學 / 地球科學學系 / 101 / Taiwan orogeny is located in a convergent zone between the Eurasian Plate and the Philippine Sea Plate. Because of initial collision, there are folds and thrusts off SW Taiwan. Besides, there are mud diapirs and mud volcanoes in the onshore and offshore area of SW Taiwan. In this study, we use the gravity data and seismic data to study the density anomalies of the mud diapers. We use the gravity data and seismic data collected in OR1-1009 and OR1-1030 cruises. According to those data, we find that mud diapers are basically formed by relatively low-density material in the middle of the diapirs. The relatively low density may be due to the gassy and hydrous sediments.
In this study, we use two gravity models to simulate the mud diapirs: (1) a mud diaper model of 10 km thick (root model) and (2) a mud diaper model of 1-2km (non- root model). In the west of Line 2, the root model is better than the non-root model. In the east of line 2, the non-root model is better than the root model. In general, the density contrast of a mud diapir is about 0.4 ~ -0.3g/cm3 and a mud volcano is about 0 g/cm3 ~ -0.3 g/cm3.
| Identifer | oai:union.ndltd.org:TW/101NCU05134135 |
| Date | January 2013 |
| Creators | Jen-Yi Yu, 尤人逸 |
| 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 | 89 |
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