山东沂水观测井水氡异常变化及其形成机制  

Analysis and discussion on anomalous variations of water radon in Yishui well of Shandong Province

作　　者：耿杰[1] 王忠民[1] 

机构地区：[1]山东省地震局,山东济南250014

出　　处：《地震》2003年第1期95-101,共7页Earthquake

基　　金：十五"国家科技攻关项目(01-04-02)

摘　　要：据沂水观测井的构造背景、环境条件和泉的成因结果,经过前兆异常现场落实和采样分析,并结合活动断裂、地震活动以及流磁观测结果对山东沂水水氡自2001年以来的异常变化从形成机制上进行了分析研究。结果表明,沂水观测井位于沂水-汤头断裂与沂水-沂源断裂交汇部位,系断层上升泉,具有应力易集中的地质构造环境;沂水水氡的下降异常变化与沂沭断裂带中南段的应力活动增强和沂水-汤头断裂与沂水-沂源断裂构造活动加剧有关。The author analyzed and researched anomalous variations of water radon and it's forming mechanism in Yishui well since March 28, 2001combined with confirmation of water radon anomaly and analysis results of sampling sites in and around Yishui wall as wall as geological structures and surveying results of mobile geomagnetism. The results of the analysis and research indicates that anomaly of descendent variation of water radon in Yishui well is interrelated with strengthening of stress activity and intensifying of structure activity of YishuiTangtou fault and YishuiYiyuan fault. 

关 键 词：形成机制 水氡异常 沂沭断裂带 山东 地下水 地震前兆 地震活动 

分 类 号：P315.723[天文地球—地震学] P315.724[天文地球—固体地球物理学]