滇东北毛坪铅锌矿区水化学特征及成因
Characteristics and controlling factors of water chemistry in maoping lead-zinc mine area, Northeastern Yunnan, China
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摘要: 地下水水化学是研究矿区复杂水文地质与水-岩作用过程的重要手段.本文采用水文地球化学与环境同位素研究相结合的方法,系统探讨了滇东北毛坪矿区地下水水化学特征及成因.结果表明研究区不同含水系统之间的水化学分布特征差异显著,指示了其不同的来源或经历了不同的水文地球化学作用过程.针对水化学特征的因子分析表明,该区水化学主要受地下水径流途径、碳酸盐岩的水岩作用、硫化物矿物的氧化溶解及农业活动等因素控制.本研究对探究西南地区复杂岩溶金属矿区地下水组分的来源及形成机制具有重要参考意义.Abstract: Groundwater chemistry is an important and efficient tool to study the water-rock interaction and the complex hydrogeological conditions in mining areas. Hydrogeochemical and isotopic studies were conducted to understand the generation mechanism of groundwater chemistry of Maoping lead-zinc miming area. The groundwater from different aquifer system has totally different characteristics of water chemistry indicating these groundwaters has different recharge source or/and has experienced different water-rock interaction processes. The results of factor analysis suggest that groundwater flow pathway, water-rock interaction of carbonate rock, oxidation of sulfide minerals and agriculture activity are the dominated factors controlling the chemistry of groundwater. This study will significantly improve the understand the generation mechanism of groundwater chemistry in Karst polymetallic sulfides mining area, Southwestern China.
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