台湾及周边海域的板块构造格局

从重、磁异常以及天然地震的震源深度特征三方面分析了台湾及周边海域的板块构造格局,提出台湾东部更新世以来存在数次碰撞—俯冲活动和南海洋壳“北上”进抵嘉、南、高、屏地区的见解,并认为这就是台湾地区现代板块构造的格局。台湾强烈的地震活动主要受制于此,今后的防震减灾规划亦应考虑这一总的大地构造背景。

THE TECTONIC PATTERN IN TAIWAN AND ITS AROUND SEA AREA

This paper analyses the plate tectonic pattern in Taiwan and its around sea arca from the data of gravity and magnetic anomaly and the regularity of the earthquake focal depth, and advances the view that there were many time collision and subduction activities in the eastern sea area of Taiwan and the ocean crust in South China Sea moved northward and reached Jiayi - Tainan-Gaoxiong-Pingdong region since Plcistocene c-poch, and to confirm that this is the rccnt plate tectonic pattern in Taiwan region. The strong earthquake activity is mainly controlled by it. The plan for the earthquake prevention and reduction in future should consider this general gcotcctonic background.