滇东北麻栗坪铅锌矿位于川、滇、黔铅锌成矿区之昭通-曲靖铅锌成矿带中部。矿体产于寒武系下统渔户村组含磷碳泥质白云岩与硅质白云岩、硅质岩的层间破碎带及其旁测羽状裂隙中，呈（似）层状、透镜状及脉状产出，具热水喷流沉积成矿特征，类似于Sedex型中的Irish型亚类成因类型，后期受晚二叠世峨眉山玄武岩浆构造活动影响产生叠加改造；成矿元素与主量元素含量的统计学分析结果指示，含矿热液中碱质和铝质成分少有利于矿质的溶解和沉淀，硫对矿质溶解运移和沉淀具有重要促进作用，而铁质太多也可能会造成对矿化剂硫的争夺，含矿热液与碳酸盐岩围岩发生交代反应可能是导致矿质沉淀的关键作用过程；成矿元素与微量元素含量的统计学分析结果指示，本区铅锌成矿主要与热卤水沉积的中温热液成矿作用有关。%Maliping Pb-Zn deposit is located in the northeast in Yunnan Province ,and in the in central of Zhaotong-Qujing lead-zinc metallogenic belt which belongs to Sichuan ,Yunnan ,and Guizhou lead-zinc metallogenic province .The ore body output from Yuhucun formation in the lower Cambrian dolomite and siliceous dolomite with phosphorus ,carbon and argillaceous ,interlayer fracture zone and feather fractures of siliceous rock , whose output form was layer , lenticular , ande vein . There were metallogenic characteristics of hydrothermal-emanation-sedimentation ,was similar to the Irish-type of the Sedex-type class .Emeishan basalt magma and tectonic activities impact on the deposit and made it remoulded in late Permian .Content of ore-forming elements and the major elements of statistical analysis results indicate ,in the ore-bearing hydrothermal alkali less conducive to the mineral and aluminum components .Ore-forming elements and content of the main elements of statistical analysis results indicate ,less alkalis and aluminum components in the ore-bearing hydrothermal fluid is benefit for mineral dissolution and precipitation ,too much iron may also cause compete occupy mineralizer sulfur .Metasomatism reaction between ore-bearing hydrothermal and carbonate rock could be the key role of mineral precipitation process .Statistical analysis of the ore-forming elements and trace elements show that Pb-Zn mineralization in this area mainly is relate with warm fluid mineralization by means of hot brine deposition .
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