海拉尔盆地地下水氟的分布特征及富集机理  

Distribution characteristics and enrichment mechanism of groundwater fluorine in Hailaer Basin

作　　者：刘圣锋 高柏[1] 张海阳 罗跃[1] 葛勤 LIU Shengfeng;GAO Bai;ZHANG Haiyang;LUO Yue;GE Qin(State Key Laboratory of Nuclear Resources and Environment,School of Water Resources and Environmental Engineering,East China Institute of Technology,Nanchang 33001,China)

机构地区：[1]东华理工大学核资源与环境国家重点实验室/水资源与环境工程学院,南昌330013

出　　处：《干旱区资源与环境》2021年第10期169-177,共9页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金(41162007,41362011);江西省重点研发计划(2018ACG70023)资助。

摘　　要：以海拉尔盆地地下水为研究对象,采集60个野外地下水样进行检测分析。运用Piper图、等值线图、δ^(2)H和δ^(18)O关系图、饱和指数以及氯碱指数等方法分析海拉尔盆地地下水氟的分布特征及其富集机理。结果表明:地下水氟浓度介于0.14~13.89mg/L,平均值为3.31mg/L,且主要以F^(-)的赋存形态存在,高氟地下水主要分布在盆地的西南方向(贝尔湖坳陷和蹉岗隆起局部地带)。该地区蒸发浓缩作用对氟富集有积极影响,由于离子交换作用,HCO_(3)-Na和Cl-Na型水对氟的富集更有优势。CaCO_(3)和CaMg(CO_(3))_(2)趋向饱和状态(SI>0)、高Fe^(2+)和Na^(+)浓度、低Ca^(2+)+Mg^(2+)浓度等水化学指标,对氟的富集具有一定参考特征。60 wild external water samples of the groundwater under the Hailaer Basin were collected.The distribution characteristics of underground hydraulic fluoride and its enrichment mechanism were analyzed by using Piper diagram,equivalent line diagram,δ^(2)H andδ^(2)O relationship diagram,saturated index,and Chlor-alkali index.The results show that the ground hydro fluoride concentration is between 0.14 to 13.89 mg/L,the average is 3.31 mg/L,and the high fluorine groundwater is mainly distributed in the southwest direction of the basin(Beier Lake Depression and Cuo Gang uplift local area).The evaporation concentration of the region has a positive impact on fluorine enrichment,due to ion exchange,HCO_(3)-Na and Cl-Na water are more advantageous.CaCO_(3)and CaMg(CO_(3))_(2)tend to saturate(SI>0),high Fe^(2+)and Na^(+)concentration,low Ca^(2+)+Mg^(2+)concentration have some certain references for indicating the enrichment of fluorine.

关 键 词：海拉尔盆地 地下水 氟 分布特征 富集机理 

分 类 号：P641[天文地球—地质矿产勘探]