吉林大学学报(地球科学版) ›› 2021, Vol. 51 ›› Issue (2): 624-637.doi: 10.13278/j.cnki.jjuese.20200033
• 地球探测与信息技术 • 上一篇
王孔伟, 路永强, 聂进, 滕明明, 王宵亮
Wang Kongwei, Lu Yongqiang, Nie Jin, Teng Mingming, Wang Xiaoliang
摘要: 三峡库区蓄水以来,长江周边出现了大量的水库地震,主要集中于巴东—泄滩—仙女山区域,目前已达上万次,最大震级为5.1级。通过野外地质调查及对已有水库地震数据进行研究,采用构造地质分析方法,对三峡库区仙女山和九畹溪断裂带水库地震空间上的迁移规律、时间上的周期规律以及微地震群的成因机理进行分析。结果表明:从时间上看,水库地震具有周期性,表现为长周期(与库水位相关)和短周期(与库水位快速波动相关);从空间上看,水库地震具有迁移规律,受九畹溪断裂控制的触发型水库地震存在着逐渐向南迁移的特征,受仙女山断裂控制的触发型水库地震局限分布于仙女山断裂北延端点处,分布于仙女山断裂西侧(周坪乡附近)带状分布的水库诱发地震逐渐呈点状向南迁移。
中图分类号:
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