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一种用于金属矿勘查的物探新方法“伪随机信号激发极化法”测量技术,2013年在新疆首次应用于野外地质勘查。伪随机信号激发极化法可以判断和区分炭质和硫化物造成的异常,传统物探方法无法做到这一点。硫化物是金属矿床的重要找矿标志。利用物探方法测量振幅可以获得硫化物引起的极化异常,一是判断其存在,二是判断其空间形态,三是确定方位和范围,从而为地质找矿提供前导数据。伪随机测量技术不仅测量振幅,也能够测量相位,通过相位比较剔除炭质引起的异常,从而提高异常查证的成功率。
A new geophysical method for the exploration of metal ores, “Pseudo-random Signal Excitation Polarization Method”, was first applied to field geological prospecting in Xinjiang in 2013. Pseudo-random signal-induced polarization method can judge and distinguish the anomalies caused by carbonaceous and sulfide, which can not be achieved by traditional geophysical methods. Sulfide is an important prospecting sign of metal deposits. Geophysical methods can be used to measure the amplitude of polarization induced by sulfide anomalies, one is to determine its existence, the other is to determine the spatial morphology, the third is to determine the azimuth and range, so as to provide geological prospecting data. Pseudo-random measurement techniques not only measure the amplitude, but also measure the phase, and eliminate the carbon-induced abnormalities by phase comparison to improve the success rate of abnormal verification.