贵州剑河5.5级地震的地质构造背景  

The Tectonic Background Introduction of Jianhe M_S 5.5 Earthquake in Guizhou

作　　者：杨光忠[1] 李吉春[1] 王志京[1] 

机构地区：[1]贵州省地矿局101地质队,贵州凯里556000

出　　处：《华南地震》2016年第2期6-12,共7页South China Journal of Seismology

摘　　要：简述了大兴安岭-太行山-武陵山大型重力梯度带及其系列断层的地质构造背景,在此基础上对地震成因进行了浅析,认为切穿水库的凸洞断层在震中深部与剑河(革东)-台江断层交汇而致局部构造应力集中而孕震,在断层渗水影响和三板溪水库荷载作用下导致应力失衡而引发地震,通过水库的调整应可或更利于可能的更大级别地震的预防和避免。The Jianhe M_S5.5 earthquake has relatively serious threat to people＇s lives and property in earthquake region, and has certain influence to ＂ the safe island of earthquake＂ southeast Gizhou. This paper briefly describes the tectonic background of Daxinan-taihang-wuling gravity gradient zone and its faults, and analyzes of the cause of the Jianhe M_S5.5 earthquake. The results show that the Tudong fault cutting through the reservoir joins the Jianhe（gedong）-taijiang fault in deep epicenter, which results in the concentration of local tectonic stress and earthquake preparation; under the influence of water percolation of fault and function of Sanbanxi reservoir＇s load, stress is unbalanced and earthquake is triggered. By the adjustment of reservoir, the greater earthquake may be prevented and avoided.

关 键 词：地震 地质构造背景 贵州剑河 

分 类 号：P315.7[天文地球—地震学]