台湾海峡及两侧弧陆碰撞断裂系形成机制及其与地震活动关系
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摘要
本文利用三轴应力椭球理论，探讨了台湾海峡及其两侧弧陆碰撞断裂系的形成机制，结果表明：在台湾岛东部地应力椭球，δ1与δ2水平，而δ3垂直；在台湾海峡及两侧δ1与δ3水平，而δ2垂直。文中还探讨了断裂系作为应力传播的边界条件，对台湾岛东部弧陆碰撞应力向西传播的影响，分析了海峡及两侧地应力集中区，通过与历史地震资料的对比分析，表明天然地震分布特征与地应力集中分布特征是一致的。
Based on the three axis stress ellipsoid theory, this paper studied the formation principleof island arc-continent collision faults in Taiwan Strait and its both sides. The result showsthat in the east of Taiwan Island, the stress a, and 82 are horizontal, and 8, verticali and inTaiwan strait and its both sides, the stress δ1 and δ3, are horizontal and δ2, vertical. The influence of faults as boundary conditions for the stress spreading was discussed. The stress centralization zone is in accordance with the distribution of earthquakes.
Based on the three axis stress ellipsoid theory, this paper studied the formation principleof island arc-continent collision faults in Taiwan Strait and its both sides. The result showsthat in the east of Taiwan Island, the stress a, and 82 are horizontal, and 8, verticali and inTaiwan strait and its both sides, the stress δ1 and δ3, are horizontal and δ2, vertical. The influence of faults as boundary conditions for the stress spreading was discussed. The stress centralization zone is in accordance with the distribution of earthquakes.
引文
1中国科学院南海海洋研究所与福建海洋研究所台湾海峡课题组.台湾海峡西部石油地质地球物理调查研究.北京:海洋出版社,1989·103～129
2李赶先.台湾海峡新生代断裂构造及其形成演化.热带海洋,1994,13(2):17～24
3[法]尼古拉著,嵇少丞译.构造地质学原理.北京:石油工业出版社,1989.21～23
4 刘以萱.华南沿海区域断裂构造分析.北京:地震出版社,1981.19～20
2李赶先.台湾海峡新生代断裂构造及其形成演化.热带海洋,1994,13(2):17～24
3[法]尼古拉著,嵇少丞译.构造地质学原理.北京:石油工业出版社,1989.21～23
4 刘以萱.华南沿海区域断裂构造分析.北京:地震出版社,1981.19～20
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