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昆明地震台流体观测井水文地球化学特征
引用本文:李圣,张立,钱文品,张光顺,何应文,杨玲英,卿元华,罗嘉铮. 昆明地震台流体观测井水文地球化学特征[J]. 地震地磁观测与研究, 2021, 43(1): 125-132. DOI: 10.3969/j.issn.1003-3246.2022.01.018
作者姓名:李圣  张立  钱文品  张光顺  何应文  杨玲英  卿元华  罗嘉铮
作者单位:1.中国昆明 650224云南省地震局;2.中国四川 611130 成都师范学院史地与旅游学院;3.中国四川 610059 成都理工大学能源学院
摘    要:以昆明地震台井水、渔塘水为研究对象,通过水质、同位素分析方法并结合水文地质、构造地质等资料,探究井水地球化学特征及意义,以及井水与渔塘水之间的水力关系。研究结果显示:昆明地震台井水、渔塘水水化学类型为HCO3—Ca型,水质受含水层和隔水层岩性控制,与2018年相比2020年井水水化学特征发生了显著变化,K+、HCO3-浓度降低,这反映了昆明地震台井—含水层渗透性有所增加;SO42-、Cl-浓度的增加则表明昆明地震台井水会受到人为干扰。研究区构造活动平稳,井水为未成熟水,演化程度较低,因含水层渗透性增强和人为干扰,自2018年7月至2020年11月昆明地震台井水—岩作用有所增强,表现为δD、δ18O富集,Mg2+浓度升高。井水补给来源为大气降水,补给区位于观测井正北的石关一带。渔塘水与昆明地震台井水间存在水力关系,在分析地表水对昆明地震台井的影响时应予以考虑,但渔塘水不是影响井水的主要因素。

关 键 词:流体观测井  地下水  地球化学  昆明地震台井

Characteristic of hydrologic geochemistry in fluid observation well of Kunming Seismic Station
LI Sheng,ZHANG Li,QIAN Wenpin,ZHANG Guangshun,HE Yingwen,YANG Lingying,QING Yuanhua,LUO Jiazheng
Authors:LI Sheng  ZHANG Li  QIAN Wenpin  ZHANG Guangshun  HE Yingwen  YANG Lingying  QING Yuanhua  LUO Jiazheng
Affiliation:1.Yunnan Earthquake Agency, Kunming 650224, China;2.China School History Geography and Tourism, Chengdu Normal University, Sichuan Province 611130, China;3.College of Energy Resources, Chengdu University of Technology, Sichuan Province 610059, China
Abstract:Taking well water and fish pond water of Kunming Seismic Station as study objects, the characteristics and significance of well water geochemistry and hydraulic relationship between well water and fishpond water are studied by water quality, isotope analysis method and hydrogeology, structural geology, etc. The results show that the water chemical type of well water and fish pond water at Kunming Seismic Station is HCO3- -Ca type, and the water quality is controlled by the lithology of aquifer and water resisting layer. Compared with well water in the year of 2018, the water chemical characteristics of well water in the year of 2020 has changed significantly. The decrease of K+ and HCO3- concentration indicates that the permeability of well-aquifer of Kunming Seismic Station is increased, and the increase of SO42-and Cl- concentration indicates that the well water of Kunming Seismic Station is disturbed artificially. The tectonic activity in the study area is stable, and the well water is immature water with a low degree of evolution. Due to the enhancement of the permeability of aquifer and artificial disturbance, the water-rock interaction of well at Kunming Seismic Station has been enhanced from July 2018 to November 2020, showing the enrichment of δD and δ18O and the increase of Mg2+ concentration. The recharge source of well water is meteoric water, and the recharge area is Shiguan area, which is north of the observation well. There is a certain hydraulic relationship between the pond water and the well water, which should be taken into account when analyzing the influence of surface water on Kunming Seismic Station well. However, the fishpond water is not the main factor affecting well water.
Keywords:fluid observation well   ground water   geochemistry   Kunming Seismic Station well
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