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| Citation: | XIE Shu-yun, CHENG Qiu-ming, LI Zeng-hua, XING Xi-tao, CHEN Shou-yu, 2009. Assessing Microstructures of Ore-Minerals by Multifractal. Earth Science, 34(2): 263-269.
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Fractal and multifractal concepts have been increasingly applied in various scientific and engineering fields.The distribution patterns of different objects at different scales have attracted more and more attention as well.This paper focuses on the investigation of the spatial heterogeneity of ore-forming minerals at micro-scales.Two ore-bearing skarn samples have been selected and the corresponding light-thin sections have also been prepared.The first sample, taken from the external contact zone between the skarn and the granite, is the blackish green ore-bearing skarn, and the second is the skarn-type ore sample which was taken from the skarn contact zone.Through MATLAB platform, the pyrites have been digitally recognized from the microphotographying images of the thin sections.The box-counting dimensions, generalized fractal dimensions and multifractal spectra have been calculated to characterize the spatial structure of the pyrites.The corresponding fractal and multifractal dimensions of the first sample are relatively lower, whereas those of the second sample are higher.The results show that there is a coressponding relationship between the multifractal parameters and the ore-forming potentials of the rocks under consideration, which can provide new indication for the quantitative assessment of ore-bearing potentials of rocks.
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