次生晕多元素含量分布的多重分形特征——以山东上庄金矿为例

Multifractal characteristics of distribution of the multi-elements from secondary halo:an example in Shangzhuang Ore Deposits

利用山东上庄金矿次生晕多元素含量数据集,应用多重分形原理,采用统计矩估计方法,计算了多重分形谱f(α)的跨度与对称性和差值Δα及广义维差值ΔD、Dmin-D0、D0-Dmax等特征参数,解析了不同元素含量分布的奇异性和非均质性.结果表明:元素分布均具有显著的多重分形特征,其谱函数形态为钩状.其中,Au的奇异性较其它元素强,这种模式更利于成矿;不同元素的多重分形谱函数形态差异特征,对区域成矿潜力的研究将具有一定的指示作用.

Applying the multifractal theory, taking the secondary halo data from the Shangzhuang Ore Deposit, adopting the moment estimation method, the correlative characteristic parameters have been calculated, including the span and symmetry of the muhifractal spectrum f （α） , difference △α and generalized dimension △D, Dmin-D0, D0-Dmax, etc; The singularity and the heterogeneity of different mineralization element distributions have been analyzed as well. The results show that all the elements have distinct muhifractal characteristics in their distribution, while the spectra are the left-deviated or right-deviated. Meanwhile, Au element has more singularity than others, which profits the ore-forming. The differential characteristics among muhifractal spectra of different elements will provide insight into the study of regional ore-forming potential.