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复电阻率法(Complex Resistivity method,简称CR法)目前在深部找矿探测中应用颇广,主要研究地下地质目标体在近区电磁耦合效应及电极化效应中引起的谱参数异常.本文主要介绍了复电阻率法的基本理论以及野外数据采集参数设置方法,以江西省贵溪市银铅锌矿田勘探为例,通过Cole-Cole数学模型对四条测线实测数据在频率域进行谱参数分解,然后选取视电阻率、视频散率两个谱参数进行数据处理,视频散率选取1 Hz和0.0625 Hz两个频点实测振幅进行计算.进而绘制了视电阻率与视频散率二维拟断面以及二维反演断面,并结合矿集区地质、物性等资料,说明此方法在划分矿集区地下地质构造特别是F2断裂的识别情况上有较好的应用效果,并为后续研究工作提供有效依据.
Currently, the complex resistivity method (CR method) is widely used in deep prospecting and exploration and mainly studies the abnormalities of spectral parameters caused by the electromagnetic coupling effect and the polarization effect of the underground geological target in the near area. The basic theory of complex resistivity method and field data acquisition parameters setting method, taking Guixi City, Jiangxi Province as an example, the Cole-Cole mathematical model of the measured data of four lines in the frequency domain spectral parameter decomposition , And then select the apparent resistivity and the video dispersion rate of two spectrum parameters for data processing, select the video dispersion rate of 1 Hz and 0.0625 Hz measured at two frequencies calculated amplitude. Then draw the apparent resistivity and video dispersion of two-dimensional pseudo-section And two-dimensional inversion sections. Combined with the data of geologic and physical properties of the ore-concentrating area, it shows that this method has a good application effect in the identification of underground geological formations, especially the F2 fault, and provides the follow-up research work Effective basis.