Investigation on relationship between Copper Mineralization and Tectonic Evolution of Taft Rhombohedral-shape Structure

Taft area is located in the central part of Urmia-Dokhtar Magmatic Arc (UDMA), adjacent to Western block of Dehshir Major Fault, in the south of Yazd city. The UDMA is one of the favorable regions for occurrence of porphyry and Skarn copper deposits with more than identified 100 copper occurrences. It seemed that these Cu occurrences are related to structures, especially major and main faults. Therefore, the Taft area is selected for investigation on relationship between Cu mineralization and Tectonics (and structures). The Aliabad and Darre Zereshk are two important Cu indices in this area. In this research, the main structures are extracted and analyzed by using Remote sensing techniques, GIS environment and Field investigations. The results shown that a Structural Rhombohedral shape was created by two order faults with N150-170 and N110-120 strikes activation. In follow, the third-stage of faulting with N60-70 trend cut and offset the all of other formed structures and known as youngest order of faulting in this area. This stage of faulting was taken placed during initiation of collision between Arabian plate and Iranian Micro plates in Oligocene-Miocene episode. Because, this fault zone was formed perpendicular to collision zone, it has tension component and prepared a suitable environment for Granitoid body’s injection in this time. This phenomenon has main role in forming of Porphyry- Skarn Cu mineralization in length of this fault zone.