深浅构造的应力状态与运动特征

在活动构造调查中我们曾遇到地壳浅部构造与地壳深部构造不一致的情况,在地震烈度调查中我们也经常发现宏观震中与微观震中的空间位置不同。本文从地壳深浅部构造应力状态和运动特征的角度,对其可能的形成机制进行了分析。文中首先对地壳可能的应力状态进行了估计,然后结合对褶皱和断裂的深浅部构造应力状态与运动特征的分析,解释了地壳深浅部构造差异性的形成机制。在此基础上分析了宏观震中与微观震中存在差异的原因,最后对地壳应力场的影响因素进行了简单介绍。

THE STRESS STATES AND MOTION CHARACTERISTICS OF THE DEEP AND SHALLOW STRUCTURES IN CRUST

The authors sometimes encounter that the shallow structure is different from the deep structure during active tectonic investigation.They also encounter that the microseismic epicentre is different from the macroseismic epicentre.And they attempt to explain the possible formation mechanism about these otherness in this paper.At first,they estimate the possible stress,states in crust,then analyze the stress states and motion characteristics combining the folds and faults and explain the possible formation mechanism about structure otherness.On the base,they discuss the reasons causing the difference between the microseismic epicentre and macroseismic epicentre.At the end,they introduce the affect factors about stress field in crust.