综合地球物理方法在坦桑尼亚卢帕金矿田东缘Twiga金矿勘查中的应用  

Application of integrated geophysical methods for the exploration of Twiga gold deposit in the eastern Lupa gold field,Tanzania

作　　者：邵江波[1] 王滑冰 都鹏飞[1] 孙进[1] 吴昊 张艳飞 郭鑫 SHAO Jiangbo;WANG Huabing;DU Pengfei;SUN Jin;WU Hao;ZHANG Yanfei;GUO Xin(No.2 Institute of Geological&Mineral Resources Survey of Henan,Zhengzhou 450001,Henan,China)

机构地区：[1]河南省地质矿产勘查开发局第二地质矿产调查院,河南郑州450001

出　　处：《矿产勘查》2020年第11期2522-2529,共8页Mineral Exploration

基　　金：河南省财政地质勘查项目(编号:豫国土资发[2017]22号)资助。

摘　　要：综合地球物理方法对隐伏金属矿产勘查具有良好的指示作用,坦桑尼亚西南部的卢帕金矿田为该国重要的产金区,受限于前期地质勘查程度及第四系覆盖影响,该地区的成矿理论研究有待完善。以卢帕金矿田东缘Twiga金矿区为研究对象,通过在区内找矿有利地段开展地面高精度磁测、激电中梯剖面和EH4连续电导率测深等综合地球物理方法测量工作,得到了较丰富的平面ΔT磁异常、平面视极化率异常、平面和断面视电阻率异常、岩(矿)石物性参数等综合异常信息。以此圈定和标识了隐伏含矿构造体的规模大小,经后期钻孔施工得到了查证,区内预测金金属量3110.63 kg,结合区域成矿背景总结规律,为该地区今后的找矿工作提供地球物理方法经验。The integrated geophysical method is a good indicator for the exploration of hidden metallic minerals,The Lupa gold field is located in southwestern Tanzania,which is an important gold-producing area.Due to the limitation of the previous geological exploration degree and the influence of quaternary coverage,the metallogenic theory research in this area needs to be improved.This project takes a gold field in the eastern margin of Lupa gold mine as the research object.By carrying out ground high-precision magnetic survey,middle ladder section of excitation and EH4 continuous conductivity sounding in the research area of the eastern margin of the Lupa goldfield,The comprehensive geophysical anomalies such as plane△T magnetic anomaly,plane apparent polarizability anomaly,plane and cross section apparent resistivity anomaly and rock(ore)physical parameters are obtained.Then the scale of deep orebearing structure was verified by drilling engineering.The gold resources in the area proved to 3110.63 kg.Combining with the regional metallogenic background,the paper summarizes the rules and provides experience for the future prospecting work in this area.

关 键 词：金矿 激发极化法 航空电磁法 高精度磁法 电阻率法 综合地球物理异常 卢帕金矿田 坦桑尼亚 

分 类 号：P631.3[天文地球—地质矿产勘探]