CSAMT法在深部找矿中的应用

Application of Controlled Source Audio-Magnetotelluric Method in Looking for Hidden and Deep Mines

CSAMT法是建立MT和AMT的基础上发展起来的一种人工源频率域测深方法,具有勘探深度适中、分辨率高和抗干扰能力强的优点,在金属矿勘探中是一种行之有效的方法。笔者先分析了目的矿区(二连铜矿区)的基本地理条件、地质和地球物理特征,得出该铜矿区深部原生铜矿具有"低阻高极化特征"的结论,为CSAMT法攻深找盲提供了前提准备条件;而后又介绍了CSAMT的原理和工作方法,并利用加拿大凤凰公司生产的新一代网络化多功能电法仪V8进行野外数据采集,通过对该矿区数据资料的处理和异常分析,推断解释出异常区域,结果表明,该方法成功解释了矿体深部富集区的位置、埋深和范围,并通过钻孔验证,为二连铜矿的二次开发提供了依据,成功地体现出了CSAMT法在攻深找盲中的应用的有效性。

The controlled Source Audio-magnetotelluric method （CSAMT） is an artificial source in frequency domain sounding method based on MT and AMT.For the advantages of medium-depth exploration,high resolution,and anti-interference ability,it becomes an effective way to metal ore exploration.First,we analyzes the basic geography,geological and geophysical characteristics of the target area （Erlian copper） and has concluded that the deep copper zone has a ＂high-polarization and low resistance＂ characteristic,which provides the premise conditions in looking for deep and hidden mines through CSAMT method.And then we describe the principles and working methods of CSAMT,the data acquisition instrument V8 produced by Phoenix company from Canada is the next-generation network-based multifunctional electrical product.Through the data processing and anomaly analysis,we get the abnormal regions.The result indicates that the method successfully explains the location,depth,and range of the deep ore-rich region,which is verified by drillings.This result provide a good basis for the secondary development of the Erlian copper.the CSAMT method successfully reflects validity in looking for deep and hiden mines.