郯庐断裂带中南段跨断层短水准形变特征初步分析

通过对郯庐断裂带中南段近20年的跨断层定点水准测量资料的处理与分析，初步总结了郯庐断裂带中南段断层垂直形变的时空活动特征。2000—2019年郯庐断裂带中南段断层垂直形变活动整体水平不高，平均合成速率为0.19 mm/a，但具有明显的分时活动特征。2000—2010年槐柏—宿迁段活动相对较大，新沂—临沂段活动相对较小，宿迁和新沂之间存在相对闭锁段；2011—2019年整体活动速率有所降低，但安丘测点活动速率相对2000—2011年增大明显。郯庐断裂带中南段的活动特征和近20年来该地区地震活动情况存在一定的对应关系。 

Preliminary analysis on the characteristics of short leveling deformation across faults in the central and southern part of Tan-Lu fault zone

Based on the processing and analysis of the fixed-point horizontal deformation data across the fault in the middle and southern part of the Tan-Lu fault zone in recent 20 years, this paper preliminarily analyzes the vertical deformation characteristics of the middle and southern section of the Tan-Lu fault. The research shows that the overall activity level of the middle and southern part of the Tan-Lu fault zone is not high, and the average combining rate is 0.19 mm/a. However, it has obvious characteristics of time-sharing activities: from 2000 to 2010, the activity in Huaibai-Suqian section was large, while the activity in Xinyi-Linyi section was relatively small. There was a relatively closed section between Suqian and Xinyi; The overall activity rate has decreased from 2011 to 2019, but the activity rate of Anqiu station has increased significantly compared with that of 2000 to 2011. There is a certain correspondence between the activitycharacteristics of the fault zone and the seismicity of the region in the past 20 years.