内蒙古自治区额济纳旗红石山南锑金矿地质特征及找矿前景分析

GEOLOGY AND ORE-PROSPECTING POTENTIAL OF ANTIMONY AND GOLD DEPOSIT IN THE SOUTH OF HONGSHISHAN AREA IN EJIN BANNER,INNER MONGOLIA

红石山南锑、金矿位于阿木乌苏—鹰嘴红山金、锑、铁、钨Ⅳ级成矿带中段南部,赋存于长城系古硐井岩群近东西向脆韧性断裂(韧性剪切带)之中,按锑、金矿(化)带的相对位置划分为东部锑、金矿(化)带和西部金矿(化)带。东部锑、金矿(化)带圈定三个锑矿(化)体,西矿段金矿化带发育两条规模较大的含金构造蚀变带,带内金矿以构造蚀变岩型和韧性剪切带型为主,次为石英脉型。金矿(化)体呈斜列式排列,与主构造线方向一致。通过对红石山南锑、金矿地质特征、矿(化)体特征及化探异常特征的综合分析研究,总结了控矿因素和找矿标志。在综合研究区域成矿规律的基础上,运用"类比"原理,指出研究区Au、Sb矿具有较好的找矿潜力。

The Shongshishannan Sb-Au deposit is located in the south part of the Au-Sb-Fe-W Ⅳ-grade mineralized zone at the Amuwusu-Yingzuihongshan area,occurring in a brittle-ductile fault（a ductile-shear zone） at east-west direction in the Gudongjing Group of the Changcheng System.It can be divided into an east Sb-Au mineralized zone（occurrences） and a west gold mineralized zone（occurrences） based upon their relative locations,in which three antimony orebodies（mineralization） have been delineated in the east zone and two gold-bearing tectonic altered belts in the west zone.Gold mineralization is dominant in tectonic altered zones,secondary in ductile-shearing zones and then in quartz veins.Gold mineralized bodies（occurrences） arranged in echelon like veins similar to the direction of the main tectonic line.Comprehensive analysis and research of geology,mineralization and geochemistry of the Hongshishannan antimony-gold deposit have achieved the ore-controlled factors and ore-prospecting indicators.Based on research of the regional metallogenesis and application of analogy method,a good potential for expecting gold and antimony in this area is indicated in this paper.