覆盖区矿产勘查中电法技术应用及有效性探讨
Coal Geology of China(2023)
Abstract
香林香达铜矿床位于内蒙古苏尼特右旗境内,属于华北板块北缘多金属成矿带的一部分.区内覆盖较厚,为草原景观区,地表露头较少,地质填图和化探方法难以满足勘查需求.本次在探矿权范围内,通过大比例尺激电中梯面积测量圈定了两处激电异常(1km2),有效缩小了找矿靶区范围.结合可控源音频大地电磁测深精测剖面对激电中梯异常部位进行剖析,圈定了地下极化异常体的空间位置.经钻探验证激电异常为矿致异常,见矿总厚度15m,铜的最高品位3.14%,平均品位1.21%.确定了本区可控源音频大地电磁测深反演剖面高阻异常的边缘部位,构造带低阻异常区内相对高阻异常部位为矿体位置,证实了激电中梯面积测量配合频率域电磁法在覆盖区内金属矿勘查中得有效性,相关研究成果为该类覆盖区找矿提供参考依据.
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Key words
high power IP,controlled source audio magnetotelluric sounding,covering area exploration,prospecting effect
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