郯庐断裂带宿迁段土壤气氡与断裂活动性关系研究  

STUDY ON RELATIONSHIP BETWEEN SOIL RADON AND FAULT ACTIVITY IN SUQIAN SEGMENT OF TANLU FAULT ZONE

作　　者：单友磊 朱红 张加家 SHAN You-lei;ZHU Hong;ZHANG Jia-jia(Suqian Seismological Service Center,Suqian 223800,Jiangsu,China)

机构地区：[1]宿迁市地震服务中心,江苏宿迁223800

出　　处：《内陆地震》2023年第2期203-209,共7页Inland Earthquake

基　　金：宿迁市断层气观测台网建设项目(201711);江苏省2018年重点研发专项(苏财教〔2018〕247号)。

摘　　要：通过跨断层土壤气氡逸出浓度测量,获得数据资料,氡浓度呈明显的正态分布特征,峰值出现在断裂中心区域或断裂带附近,随着远离断裂轴线,测值沿断层两侧呈阶梯式降低。结合郯庐断裂带宿迁段5条主干断裂分段特征以及土壤气氡M值、B值、A值、N值、相对活动度、异常下限、异常衬度等指标参数变化,得出土壤气氡逸出浓度高低与断裂活动性强弱有较好的对应关系,土壤气氡逸出浓度越高,断裂活动性越强。Through the measurement of the radon escaping concentration of soil gas across the fault,the data obtained show that the radon concentration presents an obvious normal distribution feature,and the peak value appears in the central area of the fault or near the fault zone.With the distance from the fault axis,the measured value decreases step by step along both sides of the fault.Based on the segmentation characteristics of five main faults in Suqian segment of Tanlu fault zone and the variation of soil radon parameters,such as M value,B value,A value,N value,relative activity,abnormal lower limit and abnormal contrast,it is concluded that there is a good relationship between the concentration of radon in soil and the activity of faults.The higher the concentration of radon in soil,the stronger the activity of faults.

关 键 词：郯庐断裂 宿迁段 土壤气氡 断裂活动性 

分 类 号：P315.7[天文地球—地震学]