复杂多金属矿床空间变异性套合技术研究与应用

半变异函数是分析区域化变量空间结构的核心内容和有效工具。文章以云南大红山铜铁多金属矿床作为研究对象,基于DIMINE软件平台,通过Cu、TFe、SFe主要成矿元素的统计特征的分析,并构建了沿走向、倾向及厚度方向上的变异函数球状模型,从而确立矿体主要变化方向上的变异函数参数。分析显示各元素具有明显的空间结构性,Cu元素品位呈几何异向性,而TFe、SFe元素品位呈带状异向性,运用模型叠加的方法建立了各向异性的套合结构模型,结合矿体的实际赋存条件及产出特征,总结出各成矿元素总体沿水平方向具有较强的连续性,而在厚度上表现出逐层均匀变化的特征。根据成矿元素品位空间变异性分析结果,为矿床矿化规律的研究提供重要依据,为后续生产工作提供理论指导。

Research and Application of nest structure technology for spatial variability of polymetallic deposits

The variation function is an effective tool to study the spatial structure of regionalized variable. This work took the Dahongshan copper-iron polymetallic deposit as an example. The objective is to obtain variogram parameters for the main variable directions of ore bodies. Based on the DIMINE software platform, we analyzed the statistical features of the mineralization elements Cu, TFe and SFe, and established a corresponding spherical models in the directions of strike, dip and thickness. The main metallogenic elements show obvious spatial structural characters, such as the geometric anisotropy of copper grade, and band-like anisotropy of the total iron, and soluble iron grades. The nugget structure model was established by using the superposition method. Based on the existence and occurrence characteristic of ore bodies, this research suggests that All ore-forming elements are largely continuous in horizontal direction, while variable gradually bed by bed in thickness. Such spatial variability of ore-forming elements can provide evidence for further research of mineralization regularity of deposits.