EH-4电导率成像系统在铝土矿找矿中的应用研究

简要介绍了EH-4电导率成像系统的基本原理和工作方法。在河南省渑池县雷沟铝土矿区的找矿试验中,测试了系统的稳定性、垂向电性分层能力及对矿区典型电性结构的探测能力和复杂条件的适用能力。应用小波多分辨分析的数学方法对实测数据进行了一阶多分辨分解,分离出一阶细节异常和一阶逼近异常。比对矿区ZK808孔资料,说明了一阶细节异常包含了较多的噪声和静态效应,而一阶逼近异常包含有较多的目标地质体的异常信息,从而有效地压制了噪声及静态效应,突出了目标地质体的异常信息。采用一阶逼近数据进行二维联合反演,并将反演结果与矿区地质资料进行对比,肯定了EH-4电导率成像系统在铝土矿勘查中的找矿效果及应用前景。

AN APPLICATION OF EH-4 CONDUCTIVITY IMAGING SYSTEM FOR EXPLORATION OF BAUXITE DEPOSITS

This paper briefly introduces the basic principle and method of the EH-4 conductivity imaging system.The stability of the system,the ability for vertical electrical layered recognition,the detecting ability for typical electrical structure of the mining area and the usability of the system for complex conditions were tested by the test in the Leigou Mine Area,Mianchi County of Henan province.Through the application of wavelet multi resolution analysis mathematical method,the measured data has been processed by a first-order multi-resolution decomposition,and the data has been separated into first order detailed anomaly and approximation of abnormal.By contrasting with the information of the well ZK808 of mining area,it is illustrated that First order detail anomaly contains more noise and static effect and the first-order approximation abnormalities included the more target geological anomaly information,thereby effectively suppressing noise and static effect have been done,and the target geological anomaly information has been highlighted.Using a first order approximation of data,two dimensional joint inversion was done.By contrasting with the results of two-dimensional inversion and the mine area geological data,it is confirmed that the prospecting effect and the prospect of application of the EH-4 conductivity imaging system for exploration of bauxite deposits.