【摘要】 云南毛坪铅锌矿区属于复杂型岩溶裂隙充水大水矿床,亟需查明其充水水源、径流途径以开展地下水防治工程设计与优化。基于水化学、氢氧同位素方法对矿区充水水源进行系统研究与辨识,并对矿区水文地质概念模型作了初步分析。矿区石炭系地下水表现为低水温、低TDS、高NO-3、富集重同位素,而矿区泥盆系地下水由北往南水温、TDS逐渐升高,NO-3浓度降低,微量组分浓度升高,且尤为富集轻同位素。研究结果表明以上组分均对矿区充水水源辨识有直接指示意义:石炭系主要受东侧献鸡一带岩溶洼地区补给,自东往西向矿区径流,并经由断层构造向矿区泥盆系北部补给,同时与泥盆系南部深层水源混合后排泄于矿区疏干漏斗中心。更多还原

【Abstract】 The Maoping lead-zinc deposit in Yunnan is a complicated one with abundant gush-out groundwater filled through karst fissures.There is an urgent need to delineate the recharge sources and groundwater flow paths in order to carry out the design and optimization of groundwater prevention and control projects.This study systematically discusses the water filling sources and runoff passages based on hydrogeochemical and stable isotope methods,and simultaneously builds the hydrogeological conceptual model.The carboniferous karst aquifer is characterized by low temperature,low TDS,high NO-3,and enrichment in heavy isotopes.Nevertheless,the Devonian karst aquifer shows an increasing tendency of temperature,TDS and trace elements from north to south,coupling with the decreasing of NO-3and extremely depleted light isotopes.All the above indexes directly and coincidently indicate the recharge sources and groundwater flow paths.The Carboniferous karst aquifer is recharged in the eastern karst depressions(the Xianji village),and flows to the mining area westward.Shallow groundwater in the northern part of the Devonian karst aquifer is supplied by the Carboniferous karst aquifer through faults dislocating the aquiclude,then mixes with the deep groundwater from the southern part,and finally feeds together towards the mine depression cone located in the central part.更多还原