INVESTIGATION OF ALTERATIONS CONTROLLED BY FRACTURES USING REMOTE SENSING TECHNIQUES, FRACTAL CHARACTERISTICS AND STATISTIC PARAMETERS IN THE BAJESTAN, EAST OF IRAN

摘要

The Bajestan is located in the north of the Lut block, the biggest structural block in the eastern Iran. ASTER data processing through Spectral Angle Mapper classification, band ratio, and band composition methods enhanced main the alteration zones, including Propylithic, Sericitic, Argillic and Fe-oxide alterations. Fractures map was prepared using SPOT-5 imagery and applying the enhanced spatial filters in order to recognize the role of fractures in controlling mineralization. Based on fracture map obtained by remote sensing and field studies, fractal pattern was examined through box-counting algorithm. The results showed that the maximum amount of the fractal dimension is observed in NW-SE orientation. Statistical parameters of fractures such as density, intensity, and fractures' intersection confirmed the results of previous fractal studies. Total data indicate that most alteration zones are related to lineaments, especially the main NW-SE faults. In addition, this study signifies the maximum probability of the occurrence of mineralization.