A Hybrid Fuzzy Ordered Weighted Averaging Method in Mineral Prospectivity Mapping: A case for Porphyry Cu Exploration in Chahargonbad District, Iran.

Riahi, Shokouh; Abedi, Maysam; Bahroudi, Abbas

This research presents a case study that employs the Fuzzy Ordered Weighted Averaging (FOWA) method to develop mineral prospectivity/potential maps (MPM) for the Chahargonbad district in southeastern Iran. The primary objective of the study is to uncover intricate and concealed relationships between various evidence layers and known ore occurrences through a comprehensive analysis of multidisciplinary geospatial data. Consequently, thirteen evidence layers were meticulously derived from existing databases, encompassing geological, geochemical, geophysical, and remote sensing data, which were then integrated using the FOWA multi-criteria decision-making approach to delineate favorable zones for porphyry Cu mineralization. The FOWA methodology employs a diverse array of decision strategies to synthesize input geospatial evidence by incorporating multiple values for an alpha parameter. This parameter serves as the cornerstone of the algorithm, influencing experts' perspectives on MPM risk. The methodology generates seven mineral potential maps to identify the most suitable one(s). By considering a prediction-area plot for datadriven weight assignment to each evidence map, the hybrid FOWA outputs were scrutinized to pinpoint the most appropriate map for targeting significant Cu occurrences. The resulting synthesized evidence map indicates an ore prediction rate of 77%, with known Cu deposits primarily located within favorable zones occupying 23% of the entire district area.

IRAN; PORPHYRY; GEOSPATIAL data; REMOTE sensing; MULTIPLE criteria decision making

International Journal of Mining & Geo-Engineering, 2023, Vol 57, Issue 4, p373

2345-6930

Academic Journal

10.22059/ijmge.2023.357315.595050