We use multifractal detrended cross -fluctuation analysis (MF-DXA) to investigate nonlinear behavior of
geochemical element concentration, Au-Cu-Pb-Zn-Ag, in Shangzhuang Deposit, Shandong Province, China. We find that
the generalized Hurst exponent h(q) and cross-correlation exponent hxy(q) decrease with the increase of q, which indicate
that all element concentration series and their cross pairs exhibit multifractal phenomena. By comparing the variability of
h(q) and hxy(q), we have found that the multifractal behavior is more obvious when q > 0 than q < 0 for the element Au-
Cu-Pb-Zn and their cross pairs. These analyses, given quantitative information about the complexity of the element
concentration, lead to a better understanding of the geochemical phenomena underlying mineralization process.