南昌平原区孔隙地下水水化学特征及成因分析  

Hydrochemical and genetic analysis of pore groundwater in Nanchang Plain

作　　者：陈昌剑 马青山 徐卫东[1] 田福金[2] CHEN Chang-Jian;MA Qing-Shan;XU Wei-Dong;TIAN Fu-Jin(School of Water Resources and Environmental Engineering,East China University of Technology,Nanchang,Jiangxi 300314;China.Nanjing Geological Survey Center,China Geological Survey,Nanjing 210016,China)

机构地区：[1]东华理工大学水资源与环境工程学院,江西南昌300314 [2]中国地质调查局南京地质调查中心,江苏南京210016

出　　处：《地下水》2021年第3期13-15,96,共4页Ground water

基　　金：中国地质调查项目南昌多要素城市地质调查(DD20189240)。

摘　　要：为阐明南昌平原区地下水的水化学特征及成因机制,通过统计分析、Piper三线图图示法、Gibbs图和离子比例系数,系统研究地下水化学的空间分布特征与及来源。研究结果表明:(1)孔隙地下水整体为微酸性淡水,阴离子以HCO3-为主,阳离子以Ca2+和Na+为主;(2)地下水的主要化学类型为HCO3-Ca及混合型,在空间上具有分带性;(3)地下水的主要控制因素是以溶滤作用为主导的水-岩作用;(4)地下水中的K+、Na+来源于硅酸盐的溶解,Ca2+、Mg2+的来源于碳酸盐、硅酸盐以及蒸发岩的溶解,主要阴离子来源于硫酸盐岩与碳酸盐的溶解。In order to indicate the hydrochemical characteristics and genesis mechanism of groundwater in Nanchang Plain,the spatial distribution characteristics and sources of groundwater chemistry were systematically studied by statistical analysis,Piper trigram,Gibbs diagram and ion proportion coefficient. The results show that:( 1) The pore groundwater is a slightly acidic fresh water,with HCO3-as the main anion and Ca2+ and Na+as the main cation.( 2) The main chemical types of groundwater are HCO3-Ca and mixed types,which are spatially zoned.( 3) The main controlling factor of groundwater is water-rock interaction dominated by leaching;( 4) K+and Na+in groundwater are derived from the dissolution of silicate,Ca2+ and Mg2+ are derived from the dissolution of carbonate,silicate and evaporite,and the main anions are derived from the dissolution of sulfate and carbonate.

关 键 词：南昌平原 水化学参数统计 Piper三线图 Gibbs图 离子比例系数 

分 类 号：P641.12[天文地球—地质矿产勘探]