“霍山窗”地区H_(2)浓度异常与小震活动关系分析  

Analysis of Soil Hydrogen Anomaly in the Huoshan Seismic Window Area

作　　者：方震[1,2] 黄显良 陶月潮[1] 李伸亮 陶方宇[4] 杨源源 朱厚林 陆栋梁[4] FANG Zhen;HUANG Xianliang;TAO Yuechao;LI Shenliang;TAO Fangyu;YANG Yuanyuan;ZHU Houlin;LU Dongliang(Anhui Earthquake Agency,Hefei 230031,Anhui,China;Mengcheng National Geophysical Observatory,Mengcheng 233500,Anhui,China;Hefei Earthquake Monitoring Central Station,Hefei 230000,Anhui,China;Jinzhai Earthquake Monitoring Central Station,Jinzhai 237300,Anhui,China)

机构地区：[1]安徽省地震局,安徽合肥230031 [2]蒙城地球物理国家野外科学观测研究站,安徽蒙城233500 [3]合肥地震监测中心站,安徽合肥230000 [4]金寨地震监测中心站,安徽金寨237300

出　　处：《地震研究》2023年第2期237-244,共8页Journal of Seismological Research

基　　金：国家自然科学基金青年基金项目(41802224);地震预测开放基金项目(AH22030D);武汉引力与固体潮国家野外科学观测研究站开放研究基金(WHYWX202110)。

摘　　要：基于2018年12月4日至2020年8月15日“霍山窗”地区全时段的断裂带土壤气H_(2)的观测资料,根据测量值的分布范围对资料的可靠性进行了评价,对其气象影响因素也做了分析。结合“霍山窗”地区的小震集中活动,分析了断裂带H_(2)异常与小震活动性的关系。结果表明:土地岭—落儿岭断裂带H_(2)浓度前兆异常幅度较大,对观测点所在断裂上的地震活动反应灵敏,映震效果较好。研究区变质岩含有丰富的H_(2)气源,应力积累加速了断裂带内H_(2)的释放,张性断裂为H_(2)的运移提供了良好的通道。This paper evaluates the reliability of the long-term,high-accuracy soil hydrogen data observed in the Huoshan Seismic Window area according to the distribution of measurements,and analysis of meteorological influencing factors.The relationship between the hydrogen anomaly and the activity of small earthquakes is preliminarily analyzed in the study area.The results show that the hydrogen concentration in the Tudiling-Luoerling fault has a large precursory anomaly extent,and is sensitive to the seismic activity around the observational sites on the fault,suggesting a better earthquake-precursory efficiency.The metamorphic rocks contain H_(2)-gas sources in the study area.Stress accumulation accelerates the release of H_(2)in the fault zone,and tensile faults provide a good channel for H_(2)migration.

关 键 词：断层H_(2)浓度 H_(2)来源 小震活动 “霍山窗”地区 

分 类 号：P313.32[天文地球—固体地球物理学]