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独山半坡锑矿石与围岩物性差异并不特别显著、矿体埋深较深,常规的物探方法无法满足目前的勘探要求.可控源音频大地电磁法(CSAMT)具有勘探深度范围大、分辨率高、地形影响和高阻层的屏蔽作用小,立体观测等特征,在深部找矿中发挥着重大的作用.本文首先概述了CSAMT基本原理和工作方法,在全面掌握了地质资料、物性参数的基础上,对独山半坡锑矿外围开展了CSAMT法勘探,通过应用Occam算法对CSAMT实测数据进行反演,成功地圈定了电阻率异常区域,有效地指导钻孔设计.物探异常钻探见矿,验证了CSAMT方法在深部找矿工作中的有效性,可为寻找同类深部锑矿提供指导和借鉴意义.
The difference between the physical properties of the semi-slope antimony ore in Dushan and surrounding rock is not particularly significant, and the deep buried depth of the orebody can not meet the current exploration requirements by conventional geophysical methods.The CSAMT has the advantages of large exploration depth range, High resolution, topographic effects and small shielding effect of high resistivity layer, three-dimensional observation and other characteristics, play a significant role in deep prospecting.This paper first outlined the basic principles and working methods of CSAMT, fully grasp the geological data, physical properties Parameters, CSAMT exploration was carried out on the periphery of the Banpo Antimony Mine in Dushan, and the Occam algorithm was used to invert the measured data of CSAMT successfully delineating the resistivity anomalous area and effectively guiding the drilling design. Seeing the mine, the effectiveness of the CSAMT method in deep prospecting work is verified, which can provide guidance and reference for finding similar deep antimony ore.