【摘要】 用多期GPS观测数据,建立不同时段中国大陆块体的刚性运动模型,分析中国大陆块体的相对运动。通过分析中国大陆板内块体地壳形变的动态演化,研究地壳形变量在不同时空动力作用变化的状态下偏离背景场的变化,并分析对中国大陆地震活动的影响。其结论是中国大陆内部块体总体上呈东向运动,且运动速率有别。其中,西藏块体运动速率最大,向北、向东逐渐减弱;相对于西部块体,东部块体的运动方向存在顺时针旋转的现象;不同时段各块体的运动均存在动态差异;各块体运动变化也并非完全一致,个别块体呈现出相对独立的运动特征。更多还原

【Abstract】 Rigid motion model of China continent blocks is established from several period GPS data,and the relative motions among the blocks in China continent is analyzed.Through analysis of the evolution of blocks’ motion,the variation that crustal deformation offset from background field is studied,and its influence on the seismic activity in China coontinent is also analyzed.The blocks in China continent move eastwards generally,and the rate is defferent from each other,in which the rate of Tibet block is the biggest,and it is gradually weaker towards north and east.Compared to western blocks,the directions of eastern blocks show a clockwise rotation.There is a dynamic diffrence between the blocks’ motion in defferent period.As the motion of one or two blocks shows relatively independence,the variation of block motion is not complately consistent.更多还原