Compositional data analysis in the study of integrated geochemical anomalies associated with mineralization

Vertical lithogeochemical halos and zoning vectors at Goushfil Zn–Pb deposit, Irankuh district, southwestern Isfahan, Iran: Implications for concealed ore exploration and genetic models

“…The Pearson correlation coefficient is a useful approach for the statistical investigation of the interelement relationships (Rose et al, 1979;Levinson, 1980;Templ et al, 2008;Zuo et al, 2013). In this paper, correlation coefficients were calculated from the geochemical data after log-transformation, and are assessed at 0.05 and 0.01 significance levels in Table 3.…”

Multi-Gaussian kriging: a practice to enhance delineation of mineralized zones by Concentration–Volume fractal model in Dardevey iron ore deposit, SE Iran

“…Fractal/multifractal modeling established by Mandelbrot (1983) has been widely applied in different geoscience branches especially in the spatial modeling of different mineralized zones and geochemical anomalies (e.g., Afzal et al, 2011Afzal et al, , 2012Agterberg et al, 1993;Carranza, 2008;Cheng et al, 1994;Cheng, 1999Cheng, , 2007Heidari et al, 2013;Li et al, 2002Li et al, , 2003Li et al, , 2004Lima et al, 2003;Ma et al, 2014;Zuo et al, 2009Zuo et al, , 2012Zuo et al, , 2013Zuo and Wang, 2015). The Concentration-Volume (C-V) fractal model proposed by Afzal et al (2011) can be utilized to distinguish various mineralized zones with respect to the threshold values (breakpoints).…”

Reprint of “Identification of weak anomalies: A multifractal perspective”

“…1a) occurring within the high background could be identified. In addition, the frequencybased methods do not incorporate the spatial variation of a geochemical field, which is a typical feature of geochemical variables (Zuo et al, 2013a).…”

“…Various methods, ranging from frequencybased to spatial frequency-based models can be applied to determine the threshold (Lepeltier, 1969;Sinclair, 1991;Tennant and White, 1959;Zuo et al, 2013a). The traditional method involving the estimation of the mean and standard deviation of a data set with an arbitrary choice of a threshold at a value corresponding to the mean plus two standard deviations is a widely used frequency-based method, which does not take into account the compositional nature of geochemical data (Aitchison, 1986;Filzmoser and Hron, 2008;Filzmoser et al, 2009Filzmoser et al, , 2010Reimann et al, 2012;Zuo, 2014aZuo, , 2014cZuo et al, 2013a). The method also does not adequately take into account the fact that anomalous and background populations have fairly extensive ranges of overlap in some cases.…”