新疆拉伊克勒克斑岩铜矿3D电性结构与找矿指示

拉伊克勒克铜矿是最近在新疆东准噶尔地区发现的斑岩型铜多金属矿床,矿区地表为较厚的第四系覆盖,矿体主要赋存在隐伏英云闪长岩中,确定岩体的范围和三维形态是寻找矿体的关键环节。为了查明拉伊克勒克深部隐伏岩体的空间特征,为下一步勘探工作提供参考依据,在矿区进行了AMT探测,经过数据处理及反演得到了9条电阻率拟二维断面图。反演结果表明,拉伊克勒克深部隐伏岩体与上覆地层电阻率差异明显,呈现高阻特征;岩体外层的中阻层为找矿有利位置。通过对电阻率值进行3D克里金插值及可视化显示,建立了云英闪长岩体的3D电阻率模型,刻画了岩体的顶界面位置,揭示了岩体在深部的展布形态,为矿区下一步的找矿工作提供了参考依据。

3D electrical structure and prospecting indicators of the porphyry copper deposit in Layikeleke, Xinjiang

The Layikeleke copper mine is a recently discovered porphyry copper deposit in east Jungger. The surface of the mining area is covered by the Quaternary System. The orebody mainly occurs in the concealed tonalite. Determination of the scope and the 3D shape of the tonalite is the critical process of finding the ore body. To investigate the characteristics of the spatial distribution of concealed tonalite and provide a reference for further exploration, an AMT survey was conducted in the mining area. Nine pseudo-2D resistivity sections were constructed through careful processing and inversion. These sections clearly show resistivity differences between the overlying strata and the concealed tonalite which has high resistance. Using the 3D block Kriging interpolation method and 3D visualization techniques, we constructed a detailed 3D resistivity model of concealed tonalite which shows the spatial distribution of deep ore bodies. This case study can serve as a good example for future ore prospecting in and around this mining area.