摘要
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 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 othemess in this paper. At first, they estimate the possible stress, states in crest, then analyze the stress states and motion characteristics combining the folds and faults and explain the possible formation mechanism about structure othemess. 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 crest.
出处
《高原地震》
2006年第2期25-32,共8页
Plateau Earthquake Research
关键词
褶皱
断裂
应力
重力均衡
震中
Fold
Fault
Stress gravitational equilibrium
Epicenter
