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題名 | Impact of Basement High on the Structure and Kinematics of the Western Taiwan Thrust Wedge: Insights from Sandbox Models=基磐高區對臺灣西部新構造運動之影響-砂箱模型分析的啟示 |
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作者 | 盧佳遇; 鄭富書; 張國楨; 簡文鏜; Lu, C. Y.; Jeng, F. S.; Chang, K. J.; Jian, W. T.; |
期刊 | Terrestrial, Atmospheric and Oceanic Sciences |
出版日期 | 19980900 |
卷期 | 9:3 1998.09[民87.09] |
頁次 | 頁533-550 |
分類號 | 356.232 |
語文 | eng |
關鍵詞 | 基磐高區; 臺灣; 新構造運動; 砂箱模型; Neotectonics; Western Taiwan; Sandbox; |
英文摘要 | Experimental modeling allows description of the development and kinematics of structures in mountain belts formed during oblique convergence. In the collision geometry of the Taiwan mountain belt, the Chinese continental margin is oriented about N60 ° E, whereas the N16 ° E Philippine Sea plate backstop is moving toward the Eurasian plate in a N55 ° W direction. In addition to this oblique convergence mechanism, most of the foreland structures are strongly influenced by the shape of the backstop and structural highs. Sandbox experiments have been conducted to simulate the neotectonics of western Taiwan. The kinematics of deformation comprises a combination of compression and rotation, which results in a local partitioning between thrusting and strike-slip movements. The results of specific analog models demonstrated that: (1) most of the tableland structures in the western Taiwan, such as the Tatu, Pakua, Chungchou and Chia-Yi tablelands can be interpreted as a hinge part of drag anticline formed by fault-propagating fold process; (2) most of the basin and plain structures in the western Taiwan, such as Taichung and Chianan basins, can be interpreted as a part of piggy back basins; (3) the frontal thrust may have the first appearance of rupture in front of and between the Peikang high and the Kuanyin high; (4) NW trending link faults may be developing within the transfer zones; and (5) an escape structure formed to the south of the Peikang high can be correlated with bathymetric map and models. |
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