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    内蒙古阿拉善右旗西尼乌苏金矿区物化探异常特征及找矿潜力分析

    Geophysical and geochemical anomaly characteristics and prospecting potential analysis of the Xiniwusu gold deposit in Alxa Right Banner, Inner Mongolia

    • 摘要: 西尼乌苏金矿的金矿(化)体赋存于中二叠世糜棱岩化花岗闪长岩体内部及岩体与地层外接触带内的石英网脉中,空间位置与物化探异常对应较好。其中土壤地球化学测量显示,Au元素异常规模大、强度高,且多元素异常浓集中心套合较好;激电中梯测量显示金矿(化)体具明显的高阻中极化特征;区内华力西期及期后形成花岗闪长岩具有较明显地交代重熔特征,为区内金矿形成提供了重要的物源及热源;经历多期构造叠加及水循环作用,金元素不断的活化、迁移,逐渐富集成矿,最终形成西尼乌苏金矿。

       

      Abstract: The Gold (mineralized) bodies of the Xiniwusu Gold Deposit are hosted within the Middle Permian mylonitized granodiorite massif and in quartz stockworks along the outer contact zone between the massif and strata, showing good spatial correspondence with geophysical and geochemical anomalies. Specifically, soil geochemical survey shows that the Au anomalies are large in scale and high in intensity, with well-superimposed multi-element anomaly concentration centers. The induced polarization mid-range intermediate gradient survey indicates that the gold-mineralized bodies exhibit obvious high-resistance and medium-polarization characteristics. The granodiorite formed during and after the Hercynian period exhibits distinct metasomatic remelting characteristics, providing important material and thermal sources for gold mineralization in the area. Through multi-stage tectonic superposition and hydrothermal circulation, gold was continuously activated and migrated, gradually enriched to form ore deposits, and eventually leading to the formation of the Xiniwusu Gold Deposit.

       

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