摘要
采用piper图、主要离子相关等方法对安徽霍山33井2021—2023年井水13次水样离子检测结果进行分析,结果显示:该井地下水化学类型为HCO_(3)-SO_(4)-Ca-Mg型水,水中离子以HCO_(3)-、Ca^(2+)、Mg^(2+)为主,由于井水属于承压水,埋藏深度大,径流补给途径长,溶解—溶滤作用强烈,从而引起离子浓度高于地表水;氢氧同位素的结果显示,该井主要受到大气降雨补给;离子浓度时间序列显示,在2022年10月10日霍山3.0级地震前后,2022年7—8月的离子检测中,出现Ca^(2+)、Mg^(2+)浓度升高,SO_(4)2-和Cl-浓度降低的变化,地震后恢复到正常背景值,该变化可能反应了地震孕育过程有关。
The ion detection results of 13 water samples from the Huoshan Well 33 in Anhui Province from 2021 to 2023 were analyzed by using the piper plot and main ion correlation methods.The results show that the chemical type of groundwater in this well is HCO_(3)-SO_(4)-Ca-Mg type water,and the main ions in the water are HCO_(3)−,Ca^(2+),and Mg^(2+).As the well water is confined water,with a large burial depth,long run off supply path,and strong dissolution and filtration,the ion concentration of the well water is higher than that of surface water.The hydrogen and oxygen isotope results indicate that the well water is mainly recharged by atmospheric rainfall.The ion concentration time series shows that before and after the Huoshan M3.0 earthquake on October 10th,2022,the Ca^(2+)and Mg^(2+)concentrations increased,and the SO_(4)2−and Cl−concentrations decreased during the ion detection from July to August,2022.After the earthquake,they returned to normal background values,which may reflect the earthquake preparation process.
作者
李君
李军辉
裴红云
周冬瑞
LI Jun;LI Junhui;PEI Hongyun;ZHOU Dongrui(Anhui Earthquake Agency,Hefei 230031,China;Mengcheng National Geophysical Observatory,Mengcheng 230031,China)
出处
《华南地震》
2024年第2期8-13,共6页
South China Journal of Seismology
基金
芜湖市科技计划项目(2023yf007)
中国地震局“监测、预报、科研”三结合课题(3JH-202401031)联合资助。
关键词
霍山33井
水化学特征
离子浓度
Huoshan Well 33
Hydrochemical characteristics
Ion concentrations
作者简介
李君(1995-),女,助理工程师,主要从事地震形变研究。E-mail:1020439684@qq.com;通信作者:李军辉(1982-),男,高级工程师,主要从事震磁观测研究。E-mail:lijunhui_ah@163.com。
