中国东部应力场与板块运动

随着空间观测技术发展,板块运动有可能从定性进入定量化研究.本文运用空间观测技术和大地测量采集的数据,探讨板块运动方向、速度对中国东部应力场构成的作用和影响.着重研究了该地区有代表性构造——郯庐深大断裂带的应力分布状态.结果表明,华北地块是受太平洋板块向北西西和欧亚板块向北东挤压,形成了最大水平压应力方向为北东东;华南地块最大水平压应力方向为北西西,它是由菲律宾板块向北西挤压和印度板块向北东推移影响引起的。同时,据初步研究认为,原区域应力场与震源应力场展布存在着较为明显的差异,故对预测地震,加强应力场演变过程研究是一项有意义和重要的工作.

STRESS FIELD AND PLATE MOTIONS IN EASTERN AREA OF CHINA

The effect of direction and velocity of plate motion on the stress field formation of eastern portion of China is discussed using satelitic and geodesic data. The condition of stress distribution in representative structure of this region; Urge fracture zone of Tanlu in mainly studied. It is shown that the block of North China is compressed by the Pacific plate toward to NWW and the Eurasia plate toward to NE, respectively, resulting in the direction of maximum horizontal compression being NW, and in that of the block of South China NWW, which is responsible for the compression of the Phillipine plate toward to NW and India plate toward to NE, respectively.