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Multifractal Model and its Applications for Metallogenic Elements Grade Distribution Analysis
L. Wan, D. Y. Xie, Y. Q. Zhu, X. C. Deng
Abstract
Multifractal detrended fluctuation analysis (MF-DFA) is a method which is accurate and easy to implement. In this study, the MF-DFA is used to examine the multifractal characteristics of the elements' grade series fluctuation in the Dayingezhuang gold deposit in Jiaodong gold province, China.The results show that after elimination of a number of second-order non-linear trends, the generalized Hurst exponent presents a nonlinear function respect to q, and all the values of h(2) are less than 1 but greater than 0.5, which indicate the long-range correlation and mean the development of the orebodies is relatively stable under the specific geologic background and are consistent with the facts in Dayinggezhuang gold ore deposit. The multifractal singular spectrum curves of the drifts are non-symmetrical and differ from each other, which indicate the elements' grade series in the region is characterized by multifractal features, while the shape differences of multifractal spectrum may offer an evidence for the identification of mineralization intensity. These can provide guidance for further determination of the extent of deposit concentration and delineation of a target mineralization zone.
Keywords
multifractal detrended fluctuation analysis (MF-DFA), metallogenic elements' grade, long-range correlation, mineralization intensity.
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