地球物理学进展 ›› 2017, Vol. 32 ›› Issue (4): 1556-1562.doi: 10.6038/pg20170419

• 应用地球物理学Ⅰ • 上一篇    下一篇

复电阻率法在冷水坑矿集区的应用效果

邓居智1,2, 郑燕青3, 陈辉1,2, 裴俊勇4   

  1. 1. 东华理工大学地球物理与测控学院, 南昌 330013;
    2. 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, 南昌 330013;
    3. 安顺市西秀区水电勘测设计队, 安顺 561000;
    4. 成都理工大学地球物理学院, 成都 610059
  • 收稿日期:2016-10-14 修回日期:2017-06-04 出版日期:2017-08-20 发布日期:2017-08-20
  • 通讯作者: 郑燕青,男,1987年生,硕士研究生,主要从事地球物理勘探应用研究.(E-mail:zhengyanqing20yyl@126.com) E-mail:zhengyanqing20yyl@126.com
  • 作者简介:邓居智,男,1972年生,教授,主要从事地球物理电磁法正反演及应用研究.(E-mail:jzhdeng@ecit.edu.cn)
  • 基金资助:

    国家自然科学基金(41164003,41404057)、国家科技支撑计划(2011BAB04B03)和赣鄱英才555工程项目联合资助.

Application of Complex Resistivity method (CR) in Lengshuikeng ore concentration area

DENG Ju-zhi1,2, ZHENG Yan-qing3, CHEN Hui1,2, PEI Jun-yong4   

  1. 1. School of Geophysics Measurement-control Technology, East China University of Technology, Nanchang 330013, China;
    2. Key Laboratory of Radioactive Geology and Exploration Technology Fundamental Science for National Defense, East China Institute of Technology, Nanchang 330013, China;
    3. Hydropower Survey and design team in Xixiu District of Anshun City, Anshun 561000, China;
    4. School of Geophysics, Chengdu University of Technology, Chengdu 610059, China
  • Received:2016-10-14 Revised:2017-06-04 Online:2017-08-20 Published:2017-08-20

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:

Complex Resistivity method(CR)has been widely applied in deep mineral exploration, which is mainly used to study frequency domain parameter anomaly of the underground target body caused by near-field EM coupling effects and induced polarization effect. In this paper, we primarily introduce the basic principle of CR and parameters-setting method of field data acquisition, then we give an example on Lengshuikeng Ag-Pb-Zn ore field exploration in Guixi city, Jiangxi province. By using Cole-Cole mathematical model, four survey lines measured data are decomposed into spectrum parameters in frequency domain, and we select two parameters, one is apparent frequency dispersivity calculated by actual measurement amplitude in 1 Hz and 0.0625 Hz respectively, the other is apparent resistivity. Based on the above work,we draw two-dimensional fitting section and inversion section in both apparent resistivity and apparent frequency dispersivity, combing with the geological and physical property data, the results demonstrate CR has a good application effect on dividing the geological structure (especially for F2 faults) in ore concentration area and can provide effective proof in the later research work.

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