太白岩体南缘铜(钼)矿化地质特征及找矿标志  

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

作　　者：侯满堂 严臻[2] 高怀雄 

机构地区：[1]陕西省地质调查院,陕西西安710054 [2]中国地质科学院地质研究所,北京100037

出　　处：《西北地质》2010年第1期75-85,共11页Northwestern Geology

基　　金："十一五"国家科技支撑计划项目:中西部大型矿产基地综合勘查技术与示范-西秦岭成矿地质背景与铅锌;银;铜;金资源评价技术研究(2006BAB01A11)

摘　　要：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。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 use the mining ore molybdenite Re-Os method to test isotopic age and obtain the age of 119.3-123.7 Ma for the copper-molybdenum mineralization in this area formed in the late Yanshan.Based on the relationship among ore bodies,ore-bearing rock mass,mode of occurrence,mineral components,ore textures,structures,and regional regularity of copper-molybdenum mineralization,we hold that the genetic type might be related with the granite hydrothermal type.This conclusion is of practical significance in looking for the right area and granite hydrothermal copper-molybdenum mine.

关 键 词：秦岭 太白岩体 铜(钼)矿 地质特征 找矿标志 

分 类 号：P618.41[天文地球—矿床学]