可控源与天然源音频大地电磁法对比应用研究:以云南北衙铁金矿为例  

The application and comparation of CSAMT and AMT:an example about Fe-Au mine in Beiya of Yunnan

作　　者：姚文[1] 李琼[1,2] 杨剑[1,3] 王桥[3] 杨俊波[3] 

机构地区：[1]成都理工大学地球物理学院,成都610059 [2]成都理工大学地球探测与信息技术教育部重点实验室,成都610059 [3]中国地质调查局成都地质调查中心,成都610081

出　　处：《地球物理学进展》2015年第4期1825-1832,共8页Progress in Geophysics

基　　金：中国地质调查局项目云南北衙地区金矿找矿模型与综合找矿方法研究(12120113094500);国家自然科学基金(41274129)联合资助

摘　　要：北衙铁金矿具有我国西南地区最大的金矿储量,地处三江成矿带,且拥有巨大的深部勘探潜力.通常地,常规直流电法很难在了解深部地质构造和勘探深度上满足深部找矿的需求,而可控源大地电磁测深(CSAMT)和天然源大地电磁测深(AMT)的成果能反映深部构造、地层及含矿岩系特征,预测隐伏矿体的走向.本文以北衙铁金矿为实例,结合已知地质和钻孔资料,对比研究两种方法的应用效果及优缺点,证实了北衙铁金隐伏矿床的走向,为外围远景区找矿和合理优化勘探工程布置提供了依据.The iron-gold mine in Beiya not only has the largest gold reserves in the southwest of China,located in the Sanjing metallogenic belt,but also has the huge prospecting potential.Normally,it is difficult to know the deep geological structure and meet the needs of deep ore prospecting exploration by using conventional DC electric method.Then the results of CSAMT and AMT methods can reflect the deep tectonic characteristics,the stratum and ore-bearing rock series,meanwhile predict the concealed ore body.This paper took iron-gold mine in Beiya as an example,combined with the known geological data and drilling data,compared to study the application effect of the two methods and the advantages and disadvantages. We confirmed the concealed ore body and provided the basis for drilling engineering in prospecting areas.

关 键 词：北衙铁金矿 CSAMT AMT 隐伏矿体 

分 类 号：P631[天文地球—地质矿产勘探]