牡丹江市主城区第四系地下水主要离子特征与成因分析  

Characteristics and origin analysis of major ions in Quaternary groundwater at Mudanjiang City

作　　者：王建伟 高博 佟智强 马力 宋林旭 刘浩[1] WANG Jianwei;GAO Bo;TONG Zhiqiang;MA Li;SONG Linxu;LIU Hao(Mudanjiang Natural Resources Survey Center,China Geological Survey,Mudanjiang 157021,Heilongjiang,China)

机构地区：[1]中国地质调查局牡丹江自然资源综合调查中心,黑龙江牡丹江157021

出　　处：《矿产与地质》2023年第2期399-405,共7页Mineral Resources and Geology

基　　金：中国地质调查局项目“牡丹江市多要素城市地质调查”(DD20191021)资助。

摘　　要：以牡丹江市主城区为研究区,对该区采集的24组第四系地下水样品中常规离子进行检测和分析,利用数理统计、Piper三线图、Gibbs模型、离子比例关系等方法识别地下水主要离子成因。结果表明,研究区第四系地下水中主要离子含量变化均具有较强的离散性,阴离子平均浓度HCO_(3)^(-)>SO_(4)^(2-)>Cl^(-),阳离子平均浓度Ca^(2+)>Na^(+)>Mg^(2+)>K^(+),地下水整体为淡水,呈中性偏弱酸性,水化学类型以HCO_(3)—Na·Ca型水为主;水中的化学组分主要来源于岩石风化溶解,其中,Na^(+)和K^(+)主要来源于硅酸盐矿物的溶解,Ca^(2+)和Mg^(2+)主要受碳酸盐、硫酸盐和硅酸盐矿物风化溶解作用共同控制,同时水中阳离子间存在一定交换作用。In order to study the hydrochemical characteristics of Quaternary loose rock pore water in Mudanjiang City,based on 24 samples of Quaternary groundwater collected in 2020,the chemical characteristics and origin of Quaternary groundwater in the study area are analyzed and determined by the comprehensive application of mathematical statistical method,Piper three-line diagram,Gibbs model and ion ratio.The study result shows that the variation of main ions in the Quaternary groundwater has a strong discrete type in the study area.The average concentration of anions and cations has the relationship of HCO_(3)^(-)>SO_(4)^(2-)>Cl^(-)and Ca^(2+)>Na^(+)>Mg^(2+)>K^(+).The whole groundwater is weakly acidic fresh water.The dominant cations and anions are Ca^(2+)and HCO_(3)^(-),respectively.The hydrochemical type is mainly HCO_(3)—Na·Ca water.The chemical components in the water mainly come from the weathering and dissolution of rocks,among which Na^(+)and K^(+)mainly come from the dissolution of silicate minerals,Ca^(2+)and Mg^(2+)are mainly controlled by the weathering and dissolution of carbonate,sulfate and silicate minerals.At the same time,there is a certain exchange between the cations in water.

关 键 词：第四系地下水 水化学 离子成因 牡丹江市 

分 类 号：P641.11[天文地球—地质矿产勘探]