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覆盖较厚的区域地球物理异常较弱,尤其是危机矿山二次空间探矿的人文干扰较大,从而使找矿难度增加.为了开展覆盖区隐伏矿产资源的勘查工作,应用信号较强的人工源工作方式,分别采用瞬变电磁法、可控源音频大地电磁法和激发极化法在同一矿区进行勘查.在理论上分析了这3种方法结合的优势,使3种方法在深度电阻率断面上互相校正、互相补充.在甘肃某区进行金属矿勘查时,采用3种方法组合进行联合解释,取得了较好的探矿效果,表明多电法综合进行覆盖区找矿是一种行之有效的途径.
The geophysical anomalies are weaker in the thicker area, especially in the secondary exploration of the crisis mines, so that the prospecting difficulty is increased.In order to carry out the prospecting work of the concealed mineral resources in the coverage area, a strong artificial source Mode of operation, using transient electromagnetic method, controlled source audio frequency electromagnetic method and excitation polarization in the same mining exploration.Analysis of the advantages of these three methods in theory, the three methods in the depth resistivity section On the mutual correction, complement each other in a district of Gansu metal ore exploration, the use of three combinations of methods for joint interpretation, and achieved good prospecting results show that the multi-electric method comprehensive coverage of prospecting is an effective Way.