综合地球物理勘探在犀牛山铜钼多金属矿勘察中的应用  

Application of IP Sounding with CSAMT in the Exploration of Cu-Mo Polymetallic Ore in Xi'niu Hill

作　　者：龚强[1] 陶德益 詹应林[1] 范志雄[1] 

机构地区：[1]中国冶金地质总局中南局中南地质勘察院物化探分院,湖北武汉430074

出　　处：《工程地球物理学报》2011年第2期187-191,共5页Chinese Journal of Engineering Geophysics

摘　　要：实际工作中,一种物探方法往往难以确定异常的物质成因,而达不到更确切的应用效果。单一的物探方法虽各有所长,但趋于片面。多种物探方法的综合应用,既相互印证,又互相补充,提高了推断准确率和可信度。本文利用可控源音频大地电磁法在成矿有利部位探查到了低阻目标体,并划分出了岩性;但工区地质构造、物质成分复杂,难以确定低阻异常成因,故配合使用激电测深方法,用极化率参数以辨别低阻异常的物质成因。另外,激电测深电阻率剖面于可控源电阻率剖面两者相互印证,两者在反映高、低阻体空间位置及基本形态上均基本吻合。通过两种方法的综合对比分析,为钻探工作提供了较准确可信的信息。In the practical work,a single geophysical method is often difficult to determine the causes of abnormal substances and reach more precise application results.But the comprehensive application of multiple geophysical methods can improve the inference accuracy and credibility.This paper applies the controlled source audio magnetotelluric method to probing low resistivity target in favorable sites of mineralization,and divides the rock characters.However,due to the complex geological structure and material composition,it is difficult to determine the resistivity anomaly,therefore,the IP sounding method and the polarization parameters of the material are combined to be applied to identifying the causes of low resistivity anomalies.In addition,IP sounding method is applied to probing the resistivity profile and the profile of controlled-source resistance.The probing results of the spatial location of the high-and low-resistance body and the basic form of the two profiles are consistent.Through a comprehensive comparative analysis of two methods,it provides more accurate and reliable information for drilling,and also proves the effectiveness of each method.

关 键 词：激电测深 CSAMT 金属矿 极化率 

分 类 号：P631.3[天文地球—地质矿产勘探]