Document Type : Original Research Paper
Authors
- Ghazal Janghorban 1
- Seyed Mohammad Abtahi Forooshani 1
- Keytash Moshtaghian 1
- Hooshang Asadi Harooni 2
- Hamzeh Sadeghi Sorkhani 1
- Mohammad Hajheidari 1
1 Department of Exploration, Faculty of Mining Engineering, Isfahan University of Technology, Isfahan, Iran
2 Assistant Professor, Department of Mining Engineering, Isfahan University of Technology, Isfahan, Iran
Abstract
Kuh-e Lakht epithermal gold index is located on Urumieh-Dokhtar Volcanic Belt in Isfahan province. Geological studies indicate the presence of an epithermal gold mineralization system in the area. The geophysical exploration in the area includes magnetometry, resistivity, and induced polarization surveys. Then, we implemented Li and Oldenburg algorithm for 3D inversion of the magnetic data. The depth of the largest estimated magnetic susceptibility obtained from data inversion coincides with the average depth of the magnetic sources obtained from Euler deconvolution. Furthermore, we compared the estimated 2D resistivity and electrical changeability models and the estimated magnetic susceptibility. The comparison denotes the correlation of the estimated magnetic susceptibility variations with the reduction of resistivity, high electrical chargeability, and alteration zones. Combining the estimated magnetic susceptibility model with the geochemical analysis of the exploratory boreholes in the area indicates that the mineralization often occurred at the maximum variation of the magnetic susceptibility. Nonetheless, the results indicate the possibility of mineralization along the zones with large magnetic susceptibility variations.
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