Delineation of supergene enrichment, hypogene and oxidation zones utilizing staged factor analysis and fractal modeling in Takht-e-Gonbad porphyry deposit, SE Iran

The aim of this study is to delineate the different mineralized zones consisting of supergene enrichment hypogene and oxidation zones in Takht-e-Gonbad porphyry Cu deposit (SE Iran), subsurface data and using the staged factor analysis (SFA) and concentration-volume (C-V) fractal modeling. Results obtained by SFA reveal that Cu and Mo were situated in a factor as F1-5 which was modeled by C-V fractal modeling for separation of the mineralized zones. The supergene enrichment zone obtained by the SFA and C-V fractal modeling contains 1.16% for Cu and 241 ppm for Mo. Moreover, the hypogene zone derived via the SFA and C-V fractal modeling has Cu and Mo mean values of 0.65% and 109 ppm. These mineralized zones were correlated with geological models utilizing logratio matrix which indicate that the obtained zones based on the SFA and C-V fractal model are consistent with the geological models. The results derived via logratio matrix reveal overlapping between geological and mathematical models. As a result, combination of the C-V fractal modeling and SFA can be used to delineate mineralized zones based on multivariate data. (C) 2015 Elsevier B.V. All rights reserved.