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台灣西部之新地體構造,造山機制,與地震災害

Neotectonics and Seismic Hazard of Taiwan

摘要


台灣島的新地體構造主要是受到新生代以來歐亞板塊與菲律賓海板塊的斜聚合導致的蓬萊造山運動所控制。除了斜聚合的機制之外,台灣西部前陸的構造亦顯著的受到後座體與構造高區形狀的影響。我們利用砂盒模型實驗來模擬台灣西部的新地體構造。顯示構造的運動方式主要包含了壓縮、旋轉、與伸張的組合,導致地區性逆衝與橫移運動不同比例的分配。921地震所帶來的地震災害讓我們有機會重新學習與驗證以往對於台灣造山帶的變形機制的認識,並對可能會發生的地震災害加以評估。本文由野外的觀察配合砂盒實驗的結果來探討這個主題。

並列摘要


Neotectonics of Taiwan is mainly controlled by the oblique convergence between the Eurasian plate and the Philippine Sea plate. In addition to this oblique convergence mechanism, the shape of the backstop and structural highs significantly influences most of the foreland structures. Sandbox experiments have been conducted to simulate the neotectonics of western Taiwan. The kinematics of deformation comprises a combination of compression, rotation and extension, which results in a local partitioning between thrusting and strike-slip movements. Most of the deformation in association with the 921 Taiwan earthquakes appears to be indicated by such a deformation mechanism.

被引用紀錄


陳奎源(2007)。以砂箱試驗探討基盤高地對增積岩體發育之影響〔碩士論文,國立臺灣大學〕。華藝線上圖書館。https://doi.org/10.6342/NTU.2007.02779

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