Multifractal power spectrum and singularity analysis for modelling stream sediment geochemical distribution patterns to identify anomalies related to gold mineralization in Yunnan Province, South China

Abstract

Abstract: Two multifractal modelling methods are applied to stream sediment geochemical data from the Zhenyuan gold mineral district, Yunnan Province, South China. In the first method, the ‘Singularity Index’ (α) has been applied for characterizing local structural properties of geochemical maps such as areas characterized by enriched or depleted geochemical concentrations. In the other method, a Spectrum–Area (S-A) method was applied to decompose geochemical element grid maps into background and anomaly maps. The latter are related to gold mineralization. These two methods are demonstrated in this paper and outputs of the research have provided targeted areas for further exploration.