摘要
对江西省九江地震台2号观测井井水、大气降水、马尾水泉水及天花井水库水的常量化学组分、氢氧同位素及氚活度数据进行分析,讨论九江台地下水的水化学类型、成因及补给循环过程,揭示九江地震台2号井对构造活动响应灵敏的地球化学特征。研究发现九江台2号井水水化学类型为HCO_(3)-Ca·Mg型;氢氧同位素指示九江台2号井水属于大气降水成因型,补给高程为647 m;氚活度分析给出的地下水年龄显示九江台2号井既有老水补给又有近10年的新水补给。分析结果表明,九江台2号井既有浅表水特征又有深循环水的特征,暗示两个不同补给源的含水层通过不同循环路径上升至浅表,而深部含水层可能携带部分深部构造活动的氡,并在瑞昌—阳新M_(S)4.6地震前出现较显著的异常信息。
This paper analyzed the data of constant chemical components,hydrogen and oxygen isotopes,and tritium activity of Jiujiang No.2 well water,atmospheric precipitation,Maweishui spring water,and Tianhuajing reservoir water in Jiangxi Province,discussed the hydrochemical type,genesis,and recharge cycle process of groundwater in Jiujiang station,and then revealed the geochemical characteristics of Jiujiang No.2 well with sensitive response to tectonic activity.It was found that the hydrochemical type of Jiujiang No.2 well is HCO_(3)-Ca·Mg type;theδ^(18)O indicated that the water of Jiujiang No.2 well belongs to the genetic type of atmospheric precipitation,and the recharge elevation is 647 m;the groundwater age given by tritium activity analysis showed that Jiujiang No.2 well has both old water supply and new water supply of nearly 10 years.The analysis results showed that Jiujiang No.2 well has both the characteristics of shallow surface water and deep circulating water,suggesting that the aquifers of two different recharge sources rise to the shallow surface through different circulation paths,and the deep aquifers may carry some radon from deep tectonic activities,such as the significant anomalies before the Ruichang-Yangxin M_(S)4.6 earthquake.
作者
鲍志诚
查小惠
高小其
赵影
赵爱平
许志山
陈江贻
蒋雨函
BAO Zhicheng;ZHA Xiaohui;GAO Xiaoqi;ZHAO Ying;ZHAO Aiping;XU Zhishan;CHEN Jiangyi;JIANG Yuhan(National Institute of Natural Hazards,Ministry of Emergency Management of China,Beijing 100085,China;Jiangxi Earthquake Agency,Nanchang 330026,Jiangxi,China)
出处
《地震工程学报》
CSCD
北大核心
2022年第4期920-928,共9页
China Earthquake Engineering Journal
基金
中国地震局地震科技星火项目(XH18024Y)
江西省地震局新世纪优秀人才课题(JXDZ-YXRC171)
江西省防震减灾与工程地质灾害探测工程研究中心开放基金资助项目(SDGD202019)
中国地震局地壳应力研究所所长基金(ZDJ2017-27)。
关键词
水化学组分
氢氧同位素
氚活度
地球化学特征
地震异常
water chemical composition
hydrogen and oxygen isotopes
tritium activity
geochemical characteristics
earthquake anomaly
