黄金科学技术 ›› 2023, Vol. 31 ›› Issue (3): 396-407.doi: 10.11872/j.issn.1005-2518.2023.03.134
陈磊1,2(),段宝福1,吕道1,曾建朋1,张朔1,曾兴富1,黄美俊3()
Lei CHEN1,2(),Baofu DUAN1,Dao LV1,Jianpeng ZENG1,Shuo ZHANG1,Xingfu ZENG1,Meijun HUANG3()
摘要:
玉带铜矿床位于东天山大南湖—头苏泉岛弧带北缘的卡拉塔格地区,为近年来发现的中型铜矿床。通过野外地质调查和室内研究,对该矿床地质特征及成因进行探讨,发现矿床含矿地质建造为一套火山岩—火山碎屑岩,成矿地质体为石英闪长玢岩,矿体产于石英闪长玢岩体及其与围岩接触带,受断裂控制,主要呈脉状和透镜状。矿石类型以浸染状和细脉状为主,矿石组构以粒状结构,浸染状和细脉状构造为主,金属矿物主要为黄铜矿和黄铁矿,脉石矿物主要为石英,其次为绿泥石和绢云母。成矿过程可划分为石英—磁铁矿、钾长石—石英—黄铁矿、石英—黄铁矿—黄铜矿—辉钼矿和石英—碳酸盐—石膏4个阶段。矿区普遍发育钾化、硅化、绿泥石化、绿帘石化、绢云母化和碳酸盐化等蚀变,具带状分布特征,水平方向上由石英闪长玢岩中心向外可划分为钾化—硅化带、硅化—绢云母化带、泥化带和绿泥石—绿帘石化—碳酸盐化带;垂向上由石英闪长玢岩中心向外可划分为钾化—硅化带、硅化—绢云母化—黄铁矿化带和绿泥石—绿帘石化—碳酸盐化带。玉带铜矿床的成矿地质条件、矿体特征及围岩蚀变特征均与大南湖—头苏泉岛弧带斑岩型矿床一致,属于斑岩型铜矿床。
中图分类号:
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