A comprehensive VIKOR method for integration of various exploratory data in mineral potential mapping
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ORIGINAL PAPER
A comprehensive VIKOR method for integration of various exploratory data in mineral potential mapping Maysam Abedi 1 & Reza Mohammadi 1 & Gholam-Hossain Norouzi 1 & Mir Saleh Mir Mohammadi 1
Received: 9 February 2016 / Accepted: 13 May 2016 # Saudi Society for Geosciences 2016
Abstract The central Iranian volcanic-sedimentary belt in Kerman province of Iran that is located within the UrumiehDokhtar magmatic arc zone is chosen to integrate diverse evidential layers for mineral potential mapping. The studied area has high potential of mineral occurrences especially porphyry copper, and the prepared potential maps aim to outline new prospect zones for further investigation. Two evidential layers including the downward continued map and the analytic signal of filtered magnetic data are generated to be used as geophysical plausible traces of porphyry copper occurrences. The low values of the resistivity layer acquired from airborne frequency domain electromagnetic data are also used as an electrical criterion in this study. Four remote sensing evidential layers including argillic, phyllic, propylitic, and hydroxyl alterations are extracted from Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) images in order to map the altered areas associated with porphyry copper deposits. The Enhanced Thematic Mapper Plus (ETM+) images are used as well to prepare iron oxide layer. Since potassic alteration is generally the mainstay of copper ore mineralization, the airborne potassium radiometry data is used to explore both phyllic and potassic alteration. Finally, the geochemical layers of Cu/B/Pb/Zn elements and the main geochemical component responsible for ore mineralization extracted from principal component analysis are included in the integration process to prepare final potential maps. The conventional and the extended version of VIKOR method (as a well-known algorithm in multi-criteria decision making
* Maysam Abedi [email protected]
1
Department of Mining Engineering, College of Engineering, University of Tehran, Tehran, Iran
problems) produced two mineral potential maps, and the results were compared with the ones acquired from prevalent methods of the index overlay and fuzzy logic operators of sum and gamma. The final mineral potential maps based upon desired geo-data set indicate adequately matching of high potential zones with previous working and active mines of copper deposits. Keywords VIKOR method . Index overlay . Fuzzy logic operators . Mineral potential/prospectivity mapping . Porphyry copper deposit
Introduction Airborne geophysical survey is a prevalent effort in reconnaissance stage of various exploration projects that benefits predominant natural recourses industries such as mining, oil, and environment. These surveys as efficient tools in the primary stages of mineral exploration provide diverse pieces of information concerning the background geology of a deposit-type sought, as well as measure the geophysical variations arising from the different physical proper
