双频激电法在坦桑尼亚汉德尼金矿勘查中的应用  

Application of the dual frequency induced polarization method in the exploration of the Handeni gold deposit in Tanzania

作　　者：刘洋 徐飞[2] 单仑 赵然 

机构地区：[1]中色地科矿产勘查股份有限公司,北京100012 [2]北京矿产地质研究院,北京100012

出　　处：《矿产勘查》2017年第2期319-324,共6页Mineral Exploration

基　　金：国外矿产资源风险勘查专项(编号:10254B004)资助

摘　　要：汉德尼(Handeni)金矿是近年来在坦桑尼亚绿岩带中发现的大型金矿床,矿区地形复杂、植被繁茂,物性测试显示含金的硫化物地质体具有高极化的特征。双频激电法具有受电流变化影响小、设备轻便等优点。文章主要阐述了双频激电法在该矿区的应用,通过对视幅频率的数据处理,综合分析双频激电平面、剖面和测深断面异常特征,查明矿(化)体的赋存部位、分布规模等,进一步明确找矿范围。The Handeni gold deposit is a large-sized deposit recently discovered in Proterozoic greenstoue belt in Tanzania. The deposit area has a complex topography which is filled with dense vegetation. The physical property testing shows that gold-bearing sul- fide rock mass has characteristics of high polarization. The dual frequency induced polarization method is adaptive to this area for advan- tages of light weight and its slightly subjected to the change of current intensity.In this paper,the application of the dual frequency in- duced polarization method is discussed. The survey data is processed in apparent amplitude frequency plane. Meanwhile, the ore features in apparent amplitude frequency plane for both dual frequency IP intermediate gradient and IP sounding methods are summarized, these features are critical for identifying prospecting area and locating the occurrence position of gold ore bodies.

关 键 词：双频激电法 激电中梯 单极一偶 极测 深金矿 坦桑尼亚 

分 类 号：P618.51[天文地球—矿床学]