Discrimination of geochemical anomalies using the concentration-number (C-N) fractal method and remote sensing in the Sonajil porphyry Cu deposit; Ahar


1 Department of Geology of Mineral and water resources. Shahid Beheshti university

2 Department of Geology of mineral and water resources. Shahid Beheshti University ، Tehran, Iran

3 Department of Geology of mineral and water resources. Shahid Beheshti University, Tehran, Iran

4 Department of Geology Payame Noor. Payam Noore Karaj University, Iran


The Sonajil porphyry Cu deposit is 15 km east of Harris City in East Azerbaijan province. Mineralization has often been reported as hydrothermal of various origins and structural geological control of Cu metal in the region. Geochemical exploration is beneficial and cost-effective for surveying metal deposits on a regional scale. To achieve this, the concentration-number fractal geometric method is used, which takes into account the spatial position and the pattern of geochemical data distribution. In geochemical communities resulting from the decomposition of copper metal in 1224 samples of sediments, the minimum and maximum grade for Cu metal is 160 ppm and 5600 ppm, respectively. In the next step, using remote sensing studies and processing of ASTER satellite images, the hydrothermal alterations of the region were identified. For this purpose, the range of visible to infrared waves of short wave (VNIR-SWIR) of ASTER images has been used to identify argillic, and propylitic alterations. The results showed that argillic alteration was more extensive than other alterations in the region and significantly affected the formation of the Sonajil Cu deposit. In general, the results of these methods showed that the concentration of Cu metal increases in the south and southwest and in these areas the concentration of Cu metal is very high; The severity of geochemical anomalies has increased near geological structures such as faults and shear zones. Field control indicates a high probability of mineral reserves in the target areas.


Main Subjects