摘要
研究了辽西地区垂直形变场的演化特征，结果表明，该区形变场的演化具有明显的阶段性和分区性．１９８２年以前，彰武、新民一带是形变梯度相对密集带，且形变等值线在此发生转折；１９８２－１９８４年在新民一带出现过加速上升；彰武地震后在震中区出现最大下沉量３０多毫米的北西向下沉条带．１９５８年以来，本区形变差异运动主要集中在北部，绕阳河断裂在近期有过明显活动，它是彰武４．８级地震的控震构造．
In this paper,the evolution characteristic of vertical deformation field in thewest of Liaoning has been studied.The results show that this evolution is possessed of clearfeature of period and zoning.Before 1982,Zhangwu,Xinmin areas are relative dense zone of the deformation gradient,and here deformation isolines start turning. From 1982 to 1984,accelerated elevation ap-peared in Xinmin.After Zhangwu earthquake,the subsidence band in which the largest one ismore than 30 mm appeared in the epicentral area in direction NW. The differential movementof the deformation in this area has concentrated in the northern part since 1958.The Raoyangriver fault is active in modern times.
出处
《防灾减灾学报》
1994年第1期19-24,共6页
Journal of Disaster Prevention And Reduction
关键词
垂直形变场
形变梯度
演化特征
vertical deformation field
deformation gradient
characteristics of evolution
