太白岩体南缘铜(钼)矿化地质特征及找矿标志

在太白岩体南缘发现了铜(钼)矿,圈出铜矿体2个,铜矿化体1个,钼矿化体5个。铜矿体长度245~445 m,平均厚度2.03~2.81 m,平均Cu品位1.57%~1.67%;钼矿化体长度50 m,厚度2.03~2.81 m,Mo品位0.01%~0.54%。铜钼矿化受岩体岩石、构造及蚀变带的三重控制。总结出了岩体、构造、围岩蚀变、氧化物及硫化物露头是寻找铜钼矿的重要标志。对矿区矿石中辉钼矿采用Re-Os法同位素年龄测试,获得模式年龄119.3~123.7 Ma数据,说明本区铜钼矿化形成于燕山晚期。依据矿体与含矿岩体的关系、赋存状态、矿物组分及矿石的结构构造等因素,结合区域上铜钼矿化形成规律,初步认为该矿成因类型可能为与区域性花岗斑岩活动有关的热液型。这一结论对在本区寻找与花岗斑岩活动有关的热液型铜钼矿有着重要的现实意义。

Mineralization,Geological Features,and Prospecting Indicators of the Copper(Molybdenum) in Southern Margin of Taibai Rock-Mass

In the southern margin Taibai rock-mass,the copper(molybdenum) ore has been found.There are 2 copper ore bodies,one copper-based body and 5 molybdenum mineralized bodies.The length of the Copper ore body is 245~445 m,with an average thickness of 2.03~2.81 m and an average grade of 1.57% to 1.67%.The length of molybdenum mineralized body is 50m,with a thickness of 2.03~2.81m and a grade of 0.01%~0.54%.The mineralizattion of copper-molybdenum is controlled by three factors: rock,structure,and alteration.We us...