郧县许家坡银金矿蚀变带激电试验结果及电法应用探讨  

RESEARCHES ON INDUCED ELECTRICAL TEST RESULTS OF Ag—Au ORE ALTERATION ZONE IN XUJIAPO,YUNXIAN COUNTY AND ITS USES

作　　者：凌铁城 

机构地区：[1]鄂西北地质矿产调查所

出　　处：《湖北地质》1991年第2期65-73,共9页

摘　　要：本文首先重点介绍、分析许家坡银金矿蚀变带上激电试验结果。结果包括岩矿石的电性参数,蚀变带在中梯、测深、联剖等装置的激电工作中的异常特点等。试验结果表明,用电阻率法和激电方法在许家坡及其外围地区追索圈定银金矿蚀变带,了解蚀变带的水平分布范围和深部的空间分布不仅有地球物理前提,切实可行、而且效果较好。同时在研究试验结果的基础上,又对许家坡及其外围地区的电法应用规律作了探讨。The author,above all,emphatically introduces and analyzes the induced electrical test results of the Ag—Au ore alteration zone in Xujiapo.These results mainly include the electrical parameters of rocks and ores,and the anomaly characteristics of the alteration zone reflected from the induced electrical works with those arrays of central gradient, electrical(resistivity)sounding,composite profiling,etc. The test results indicate that the apparent resistivity anomalies of the induced electri- cal works with those arrays of central gradient and electrical sounding are clear,outstand- ing and effective because of the alteration zone with high resistivity and obvious differ- ences from the country rocks. Because the meta—basites locally rich in pyrites regularly occur within the strata slightly below the alteration zone within Xujiapo sector,in this site there are low resistiv- ity-high polarization intersections produced by induced electrical composite profiling; this set of intersections is one of markers judging for this sector whether the alteration zone exists or not. Based on the study of the test results,the author researches into the applied regulari- ties of electrical method to xujiapo and its surrounding areas then.It is indicated that in the sectors with good geological prerequisites of prospecting,the resistivity method(cen- tral gradient array or four—pole array symmetrical,symmetrical profiling)may be,above all,utilized for discovering the high resistivity anomalies;then,the resistivity sounding and induced electrical composite profiling may be set for further determining the attitude ,morphology and burried depth of the alteration zone,and determining whether the above—mentioned meta—basites rich in pyrites exist or not in order to judge the alter- ation zone.

关 键 词：银金矿蚀变带 视电阻率 视极化率 电法应用 

分 类 号：TD1[矿业工程—矿山地质测量]