复电阻率法在冷水坑矿集区的应用效果

发布时间：2019-04-22 19:02

【摘要】：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.
[Abstract]:The complex resistivity method (Complex Resistivity method, (CR method) is widely used in deep prospecting at present. It mainly studies the spectral parameters anomaly caused by electromagnetic coupling effect and electric polarization effect of underground geological target in the near area. This paper mainly introduces the basic theory of complex resistivity method and the setting method of field data acquisition parameters, taking the exploration of silver lead zinc ore field in Guixi City, Jiangxi Province as an example. Cole-Cole mathematical model is used to decompose the spectral parameters of four measured data in the frequency domain, and then two spectral parameters of apparent resistivity and video dispersion are selected to process the data. The measured amplitudes of 1 Hz and 0.0625 Hz are selected to calculate the video divergence. Furthermore, two-dimensional pseudo-section and two-dimensional inversion section of apparent resistivity and video divergence are drawn, and combined with geological and physical data of ore concentration area. It is shown that this method has a good application effect in the identification of underground geological structures, especially F _ 2 faults in ore concentration areas, and provides an effective basis for further research work.
【作者单位】：东华理工大学地球物理与测控学院;东华理工大学放射性地质与勘探技术国防重点学科实验室;安顺市西秀区水电勘测设计队;成都理工大学地球物理学院;
【基金】：国家自然科学基金(41164003,41404057) 国家科技支撑计划(2011BAB04B03) 赣鄱英才555工程项目联合资助
【分类号】：P631.322

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