闽赣地区跨断层垂直形变与地震关系初探

Preliminary Study on the Relation between Cross-Fault Vertical Deformation and Earthquakes in Fujian and Jiangxi Province

利用闽赣地区跨断层流动垂直形变测量资料 ,对该地区断层现今活动的动态过程及空间分布进行了初步研究。结果表明 ,闽赣地区断层现今活动具有时空不均一性 :时间上具有准同步转折及阶段性特点 ,各阶段的活动速率和方式不同 ;空间上具有区域差异性 ,坑北—前梧断层活动速率最高 ,白竹湖断层活动速率最低。讨论了断层活动与地震的关系 ,认为 1984年以来 4次准同步转折均与地震有关。

In this paper, mobile cross-fault vertical deformation data in Min-Gan area are analysed preliminarily and the time process and space distribution of current fault activity in Fujian and Jiangxi Province are studied. The results show that the nowadays fault activity in Fujian and Jiangxi region manifests itself with space-time nonhomogeneity. In time domain, the activity of faults has features of a synchro turn in the course of events, which occurred in stages, with different activity speed and mode. In space domain, the activities are unlike in different areas, e.g. the activity in Kengbei-Qianwu fault is the highest but that in Baizhuhu fault is the lowest. The relationship between fault activity and earthquake is discussed. It is suggested that four synchro turn times is related to the earthquakes.