Application of Singularity Index (SI), Fuzzy-Gamma and AHP methods for Pb-Zn Prospecting in the Khondab sheet, Malayer-Isfahan Metallogenic Zone, Iran

In this research, using fuzzy logic (gamma) methods, analytic hierarchical analysis (AHP), and based on the weighting of exploratory layers by the opinion of geoscientists, modeling of mineral potential for lead and zinc metals in the Khondab sheet. The geochemical layer related to Pb-Zn metals has been prepared using the singularity index (SI) method, which has high accuracy in detecting weak and hidden anomalies. All exploratory layers and substrates including lithology, geochemistry, the density of lead and zinc deposits and mineral signs, the density of faults and silica and carbonate alterations were weighted using the fuzzy logic (gamma) method and ranged from 0 to 1 and fuzzy layers with gamma value (γ) of 0.95 were combined with each other and prepared the potential maps for Pb-Zn metals in the study area. Then, using the AHP method and forming a suitable matrix for the exploratory layers, the layers were weighed and a potential map of the desired metals was obtained. The results showed that the AHP method identified more anomalies compared to the fuzzy logic (gamma) method and the anomalies obtained from this method show more compliance with the Pb-Zn deposits in these regions.