Multifractal characteristics of various metallogenic elements in Damoqujia ore deposit, Shandong province

Via the method of moments, the frequency in the different scaled grade segments in a sorted data series taken as the measure, the generalized spectrum(D-q-q) and multifractal spectrum (f(alpha)-alpha) of various elements in different geological bodies in the Damoqujia deposit are studied. In case of that the order of moment(q) ranges from - 0.2 to 1.6, the multifractal characteristics of the various elements in the orebody and the wallrocks, including Linglong granite and Jiaodong group, are obviously different. The generalized spectrum (D-q-q) in the orebody is like straight line and the width of multifractal spectrum is narrow; However, generalized spectrum in wallrocks is bended obviously and the width of f(alpha) is wider than that in the non-mineralized area. The spectrum differences reveal the element grade distribution in the oredody is denser and more homogeneous than that in the wallrocks. In addition, in the multifractal spectrum, the alpha value corresponding to peak of f(alpha) in the oredody is small than that in wallrocks, reflecting the grade increment of most probable subset and the enrichment of metallogenic elements in orebody. Therefore, Multifraetal analysis reveals that metallogenic elements are more concentrated and homogeneous in orebody than those in wallrocks.