台湾海峡及其两岸的地球动力学环境

GEODYNAMICS ENVIROMENT IN THE TAIWAN STRAITS AND ITS BOTH COASTS

本文根据断层的力学性质、活动习性、褶皱、断陷盆地、平原、海湾的形成机理，火山活动、水系分布格局，震源机制解、地壳形变场、ＧＰＳ观测成果和ＥＤＭ（光电测距）资料等，对比研究了台湾海峡及其两岸现今的地球动力学环境。结果表明：台湾海峡处在北西方向引张的应力环境；台湾地区受到来自太平洋菲律宾海板块向北西方向的挤压和因台湾海峡下降而产生的向南东方向的挤压；福建沿海则受到印度板块向北向东的挤压和太平洋菲律宾海板块向北西方向的挤压以及台湾海峡下降而产生的向北西方向的挤压。

Based on the fault mechanics and activity, bay formed mechanism, water system distribution, crustal deformation and GPS observations and others, the curent geodynamics enviroment in the Taiwan Straits and its both coasts is contrasted and studied. The results show that the Taiwan Straits is in the strain cirumstance extended by the westnorth direction, the Taiwan region is compressed by the westnorth direction from the Pacific Ocean-Philippine Plate and the eastsouth direction from the descending of Taiwan Straits, and the Fujian inshore is compressed by the east and north direction from the lndian Plate, the westnorth direction from the Pacific Ocean Philippine Plate and the westnorth direction from the descending of Taiwan Straits.