山西断裂带跨断层形变观测资料动态特征分析

摘要

On the basis of analysis of the fault-crossing deformation observation data on Shanxi fault zone, this paper discussed the deformation characteristics of the zone. According to the long-term trend analysis, tensional deformation has been the main deformation of both the north and the south part of the Shanxi fault. On the middle part shearing is the main deformation. The time subsection results indicates that from 1989 to 2000, faulting inverse inheritance turning changes appeared in three stations:Xiadazhi, Daixian, Guangsheng temple,in the central part of Shanxi fault zone. In the same time, the absolute value of the fault' s vertical movement rate significantly reduced, which reflectes a locking condition of the fault activity in Xiadazhi, Daixian, Guangsheng temple area. In addition, the fault-crossing deformation observation data and GPS strain rate field results indicate that the Shanxi fault deformed mainly with a near NW tensional deformation. However, as the different observation dimension, the value between them are not be comparable.%利用多种分析方法对山西断裂带跨断层形变观测资料进行了分析.长趋势分析结果表明,山西断裂带南北两段以拉张变形为主,中段以剪切变形为主.时间分段结果表明,1989-2000年间,位于山西断裂带中部的下达枝、代县、广胜寺3个测点出现断层逆继承性转折变化,断层垂直运动速率绝对值明显减小,反映下达枝、代县和广胜寺地区断层活动呈闭锁状态.另外,跨断层形变观测资料和GPS应变率场结果均表明山西断裂带以近NW向拉张变形为主,但由于观测尺度不同,在量值上二者不具有可比性.