近场源三极激电法在坦桑尼亚铁建造型金矿床中的应用  

Study on Application of Near-field Source 3-pole IP in Exploraiton of BIF Gold Deposit in Tanzania

作　　者：程华[1] 李水平[1] 刘振超[1] 孙进[1] 张勇[1] 谢彦军[1] 宋永利 CHENG Hua;LI Shui-ping;LIU Zhen-chao;SUN Jin;ZHANG Yong;XIE Yan-jun;SONG Yong-li(No.2 Institute of Geological&Mineral Resources Survey of Henan,Zhengzhou 450001)

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,郑州450001

出　　处：《矿产勘查》2018年第10期2015-2020,共6页Mineral Exploration

基　　金：国土资源部国际科技合作项目(编号:2010-188)资助;国土资源部国外矿产资源风险勘查专项(编号:201210B01600252)联合资助

摘　　要：铁建造(BIF)型金矿是坦桑尼亚绿岩带中的主要金矿床类型,该国每年大约有1/3的黄金产量来自于此类型矿床;为了给矿区成矿预测和优化选择靶区提供地球物理信息,投入了装置轻便、效率高的近场源三极激电方法,对浅层矿化岩层或矿化带进行了快速圈定;近场源激电异常特征反映了与金矿有关的条带状铁建造(BIF)的延伸方向、位置和范围,为钻探工程布置、进而发现隐伏-半隐伏铁建造型金矿床提供了充分依据,其测量效果较好,目前该矿区已成为大型铁建造(BIF)型金矿产地,提交了(332)+(333)金金属量34 t。The Banded Iron Formation(BIF)gold deposit is one of the main type of gold deposits in greenstone belt of Tanzania,which produces about one-third of the Country’s annual gold production.In order to provide geophysical information for the metallogenic prediction and optimization of targets selection,the Near-field source 3-pole IP method on a lightweight and high efficiency device has been used to identify the shallow mineralized rocks or mineralized belt quilckly.The characteristics of Near-field source IP anomalies could reflect the extension direction,location and scope of the banded iron formation(BIF)relateing to gold deposits,providing a full basis for drilling location and furthur discovery of concealed-half concealed BIF gold deposits.It has been proved that the survey results are rather good that the mining area has become a concentrated area of BIF gold deposits and has been submitted 34 tons of gold metal(332+333).

关 键 词：近场源激电 条带状铁建造 金矿床 坦桑尼亚 

分 类 号：P631.2[天文地球—地质矿产勘探]