高频大地电磁法在黔北某铝土矿勘查中的应用  

Application of High Frequency Magnetotelluric Method in a Bauxite Ore Exploration in Northern Guizhou

作　　者：张德实[1,2] 何帅 杨炳南[1,2,3] 沈小庆 韩姚飞[1,2] ZHANG De-shi;HE Shuai;YANG Bin-nan;SHEN Xiao-qing;HAN Yao-fei(103 Geological Party,Guichou Bureau of Geology&Mineral Exploration and Development,Tongren 554300,Guizhou,China;Engineering Technology Innovation Center of Mineral Resources Explorations in Bedrock Zones,Ministry of Natural Resources,Guiyang 550081,Guichou,China;Guizhou Prouince Manganese Ore Resources Forecasting and Evaluation Technology Innovation Talent Team,Tongren 554300,Guizhou,China)

机构地区：[1]贵州省地矿局103地质大队,贵州铜仁554300 [2]自然资源部基岩区矿产资源勘查工程技术创新中心,贵州贵阳550081 [3]贵州省锰矿资源预测评价科技创新人才团队,贵州铜仁554300

出　　处：《贵州地质》2022年第2期115-121,共7页Guizhou Geology

基　　金：黔科中引地[2021]4027;黔科合平台人才[2018]5618;黔科合支撑[2019]2868联合资助。

摘　　要：为研究高频大地电磁法在黔北铝土矿山勘查中的应用效果,笔者从区内岩矿石物性特征分析入手,结合已有地质资料建立含矿岩系模型进行正反演,选出一维TM+二维TE反演模式,用于区内实测剖面的数据处理,最后与钻孔约束的地质勘探剖面对比分析,结果表明高频大地电磁法既能圈定岩溶、识别断裂等构造,又能较清晰地划分出区内主要地层电性界面,间接配合地质找矿。说明高频大地电磁法在黔北隐伏铝土矿勘查和服务于生产矿山防治水等领域具有较好应用前景。In order to study the application effect of high-frequency magnetotelluric method in the exploration of bauxite mines in northern Guizhou,it starts from the analysis of the physical properties of rocks and minerals in the area,and combines the existing geological data to establish a model of ore-bearing rock series for forward and inversion.The inversion model is used for data processing of the measured section in the area,and finally compared with the geological exploration section constrained by the borehole.The results show that the high frequency magnetotelluric method can not only delineate karst,identify faults and other structures,but also can clearly demarcated the main strata electrical interface in the area,which indirectly cooperates with geological prospecting.It means that the high-frequency magnetotelluric method has good application prospects in the fields of buried bauxite exploration in northern Guizhou and serving the production of mine water control.

关 键 词：电磁法 铝土矿 断裂 岩溶 正反演 贵州北部 

分 类 号：P631.325[天文地球—地质矿产勘探] P618.45[天文地球—地质学]