内蒙古乌努格吐山铜钼矿区地下水化学特征及其成因机制  

Chemical Characteristics and formation mechanism of Groundwater in Wunugetushan copper-molybdenum Deposit,Inner Mongolia

作　　者：李冰[1] 鄂建新[1] 宋扩 侯晓宇 周杰[2] LI Bing;E Jianxin;SONG Kuo;HOU Xiaoyu;ZHOU Jie(China Gold Group Geology Co.,Ltd.,Beijing 101304,China;China Gold Inner Mongolia Ming Co.,Ltd.,Manzhouli 021400,Inner Mongolia,China;Baotou Earthquake Agency,Baotou 014010,Inner Mongolia,China)

机构地区：[1]中国黄金集团地质有限公司,北京101304 [2]中国黄金集团内蒙古矿业有限公司,内蒙古满洲里021400 [3]包头市地震局,内蒙古包头014010

出　　处：《地质找矿论丛》2024年第2期256-264,共9页Contributions to Geology and Mineral Resources Research

摘　　要：内蒙古乌努格吐山铜钼矿地处呼伦贝尔草原腹地。本文对研究区内地下水及地表水进行了系统采样测试,应用数理统计、Piper三线图解、相关性分析、Gibbs模型以及离子比例关系等方法对研究区水样进行综合分析。研究结果表明,区内水体阳离子以Ca^(2+)和Na^(+)为主,Ca^(2+)基本来源于钙镁硅酸盐岩的风化溶解,Na^(+)主要来源于岩盐溶解;阴离子以HCO^(-)_(3)和SO_(4)^(2-)为主,主要受碳酸盐的溶解影响,局部受含硫矿物的氧化和尾矿液渗透影响较大。水化学类型以HCO^(-)_(3)Ca·Mg和HCO_(3)·SO_(4)-Ca·Mg·Na型为主,总体呈中性,大部分属微硬淡水。区内水化学成分主要受溶滤作用影响,阳离子交替吸附作用和浓缩作用也有一定影响。基本查明了矿区及其周边地下水化学特征及其成因机制,为矿山地质环境影响评价、绿色和谐矿山建设以及草原生态环境保护等提供科学依据。Wunugetushan copper-molybdenum deposit in Inner Mongolia is located in the hinterland of Hulun-Buir Grassland.The groundwater and surface water in the study area were systematically sampled and tested.The test results of water samples were analyzed by mathematical statistics,Piper's three-line diagram,correlation analysis,Gibbs model and ion ratio analysis.The research results show that the positive ions in the aquifers in the area are mainly Ca^(2+) and Na^(+),and the anions are mainly HCO^(-)_(3) and SO_4^(2-).Among the Ca^(2+) basically come from the weathering and dissolution of calcium magnesium silicate rock,the Na^(+) mainly come from the dissolution of rock salt,the formation of anions is mainly affected by the dissolution of carbonate,and locally affected by the oxidation of sulfur-containing minerals and the penetration of tailings liquid.The hydrochemical types are mainly HCO_(3)-Ca·Mg and HCO_3·SO_(4)-Ca·Mg·Na,which are generally neutral and most of them are slightly hard freshwater.The chemical composition of water is mainly affected by solution filtration,and also by cation alternating adsorption and concentration.Basically identified the chemical characteristics of groundwater and its formation mechanism in the mining area and its surrounding areas,provide scientific basis for mine geological environment impact assessment,green and harmonious mine construction,grassland ecological environment protection,etc.

关 键 词：乌努格吐山铜钼矿 水化学 Gibbs图解 绿色矿山 内蒙古 

分 类 号：P641.12[天文地球—地质矿产勘探]