中文摘要：

近年来对＂世界锑都＂湘中锡矿山地下水质监测表明该区地下水污染严重。以北矿锑矿层地下水为研究对象,在总结前人研究的基础上,结合水文地质条件并应用水化学基本分析方法对水质基本化学特征以及重金属离子锑（Sb）和砷（As）的污染特征进行了研究,并分析了污染地下水成因。结果表明,地下水水化学类型以SO_4·HCO_3-Ca型水和SO4-Ca型水为主,碳酸盐岩对酸性水的中和作用使水样呈碱性。锑浓度平均超标772倍,砷浓度平均超标30倍,Sb比As污染程度大,Sb的高值区出现在北矿中部,而As高值区在北炼厂附近,Sb和As均在东北部形成低值区。含矿层污染地下水的形成和分布主要受地层岩性影响和人为采矿活动影响。此项研究不仅补充了锡矿山锑矿区地下水研究的空白,并能为今后进行锡矿山锑矿区环境污染评价和重金属污染治理提供重要依据。

英文摘要：

The recent ground water quality monitoring of Xikuangshan mine,known as＂the antimony city of the world＂,shows groundwater in this area is seriously polluted.The groundwater of the Northern Mine has been taken as the research object in this paper.Then on the basis of previous studies,the hydrogeological conditions have been combined with the basic hydrochemical analysis to study the hydrochemical characteristics of groundwater and heavy metal pollution of Sb and As,and finally to figure out the causes of polluted groundwater.This research shows that the groundwater was all weak alkaline,and hydrochemical types mostly were SO_4-HCO_3-Ca and SO_4-Ca.The maximum of total dissolved solid and total hardness were found in the vicinity of the northern slagheap,with the average value one time higher than the background value.In addition,the average concentration of Sb and As is 772,which is 30 times as much as that of Chinese drinking water standard respectively.The pollution of Sb is heavier than that of As.The maximum level area of Sb concentration is in the middle of the mine,while that of As is near the northern smeltery,both forming low level areas in northeast part.The forming and distribution of the ground water containing pollutants are mainly affected by the influence of strata lithology and artificial mining activity.This study has started the study of ground water in Xikuangshan but provided important evidence for the environmental pollution evaluation and restoration in the area.