Abstract: Mobile leveling data measured across faults in three provinces Jiangsu,Shandong and Anhui are analyzed systematically and completely time and space,and all the observation curves removing the long-time linear components are gmen to show abnormal features.The abnormal activities of the faults are analyzed one by one with the knowledge of geological structure.The result shows that the fault activites have a trend of being strengthened from 1991 in the Tanlu fault zone,that is,the Tanlu fault zone is being active.The activity of the south segment of the Tanlu fault zone is extensional,in the middle and north part of it,the fault activity behaves compressional.While in the east to Maoshan mountain,the fault activity is mainly compressional.All the anomalies occurred to mainly in 1991 and 1995,their distribution in the time-sapce is relatively concentrated.These facts show that the stress field has had comparatively more variation in this area.These results and conclusions have important materta value and reference value for further researches on geoaynamics,crustal deformation monitoring earthquake prediction and recent tectonic movement.

Key words: Tancheng-Lujiang fault zone, Faulting, Leveling

摘要： 首次对苏鲁皖三省跨断层流动水准测量资料进行了系统的分析,给出了去掉长趋势项的有异常活动的全部观测值曲线。结合地质构造,对其异常活动性质进行了逐一的分析。结果表明,1991年以来郯庐断裂带上的断层活动有加强的趋势,其南段多为张性,中、北段多为压性,茅山东侧断裂以压性为主。异常变化主要出现在1991年和1995年前后,推测新的区域地壳异常活动期已开始。

关键词: 郯城－庐江断裂带, 断层活动, 水准测量