基于Micromine软件的澳大利亚某矿床铅锌品位分布规律研究

基于三维模型的矿床地质统计学研究，可以准确反应矿体的空间结构变化和品位的空间变化规律，在矿床评价中具有不可替代的作用。本文在已有的钻探工程数据基础上，借助三维建模软件以地质统计学思维对澳大利亚某矿床铅锌品位的空间分布特征及内在规律进行了揭示，通过对矿体铅锌品位在走向、倾向和厚度三个方向的理论变异函数的拟合，表明矿体呈明显的各向异性，在走向方向变程值较大，连续性较好，倾向方向次之。对矿体块体模型空间赋值，并进行投影分析，结果表明矿体沿走向向东矿化范围和强度均有扩大趋势，且在815800E线以东深部倾向方向铅锌品位逐渐增强，高品位矿化断续出现。因此矿区下一步勘查重点应该在矿体走向东部和815800E线以东的倾向延伸方向。

The lead-zinc grade distribution of a mine in Australia derived from an analysis using Micromine software

Geological statistics of deposits based on a 3D model permits to describe the spatial structure change of the orebody and the spatial variation of the grade, so plays an important role in assessment of deposits. This work attempted to reveal the lead-zinc grades distribution of a deposit in Australia by geostatistical methods. Based on the existing drilling data, the spatial distribution characteristics and internal laws of lead-zinc grades of this deposit were analyzed using a 3D modeling software. The fitting of theoretical variograms in the three directions of strike, trend and thickness of the ore body indicates that the orebody exhibits significant anisotropy, with highly variable values and good continuity in the direction of the strike, and followed by the dip direction. Spatial interpolation of the orebody block model and the projection analysis show that the intensity and scope of the mineralization tend to expand in the eastward strike direction of the orebody, the lead-zinc grade gradually increases and high-grade mineralization appears intermittently in the dip direction east of 815800E line. Therefore, the focus of the next exploration in the mining area should be on the eastern extension of the ore body and the dip extension in the east of 815800E line.