Electrical imaging of gold-bearing mineralization zones through 3D geophysical modeling
نویسندگان
1 School of Mining Engineering, College of Engineering, University of Tehran, Tehran, Iran.
2 School of Mining Engineering, College of Engineering, University of Tehran, Tehran, Iran.
3 School of Mining Engineering, College of Engineering, University of Tehran, Tehran, Iran.
4 Civil Engineering Department, Islamic Azad University of Shabestar, Tabriz, Iran.
doi
10.22059/ijmge.2025.395329.595250چکیده
This study illustrates the use of 3D geoelectrical inversion modelling to accurately identify and characterize gold mineralization at a high potential zone in Iran. Nine parallel time domain geo-electrical profiles were acquired using a pole-dipole array, covering a total of 200 meters per profile with 10-meter electrode spacing. The induced polarization and resistivity data were processed and inverted using an unstructured tetrahedral mesh, enhancing the resolution and providing a more precise understanding of subsurface anomalies. The results revealed distinct chargeability and resistivity profiles, which were correlated with siliceous dikes and sulfide-rich zones, both of which are indicative of potential gold mineralization. Shallow anomalies (20-50 meters) align with hornfels layers and display characteristics typical of low-sulfidation epithermal systems, suggesting favorable conditions for gold mineralization. Furthermore, deeper anomalies (50-70 meters), associated with intrusive bodies, exhibit high resistivity and chargeability, consistent with gold-enriched siliceous veins. The study emphasizes the importance of integrating geophysical inversion techniques in gold exploration, as they provide a cost-effective and accurate method for identifying mineralized zones, reducing exploration uncertainties, and enhancing resource estimation. This approach contributes significantly to the efficiency and success of mining ventures by providing valuable insights into subsurface structures.
