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Geochemistry: Exploration, Environment, Analysis
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Geochemistry: Exploration, Environment, Analysis; 2007; v. 7; issue.4; p. 293-301;
DOI: 10.1144/1467-7873/06-116
© 2007 Geological Society of London

Original Article

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

Khaled Ali1,2, Qiuming Cheng1,3 & Zhijun Chen3

1 Department of Earth and Space Science and Engineering, York University, 4700 Keele Street, Toronto, ON M3J 1P3, Canada (KhaledAli{at}gmail.com)
2 Current address: De Beers Canada Exploration, 65 Overlea Blvd, Suite 300, Toronto, ON M4H 1P1, Canada
3 State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, Beijing 130083, China (qiuming{at}yorku.ca)

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’ ({alpha}) 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.

Key Words: multifractal • singularity • power spectrum • anomaly • stream sediment • Yunnan