Petrography and tectonic setting of the mylonitic granitoids, SE-Qorveh (Kurdistan)

The studied mylonitic granitoid is part of the granitiod batholite of south of Qorveh. Range of lithology of this complex is including granite, aplite with less abundant, biotitegranodiorite. These rocks are emplaced in a shear zone after they formed. Based on differences rate of strain, they are deformed as mylonitized and deformed rocks. Observations of field, petrographical and geochemical data imlpy they belong to I- type, poorly peraluminous and calalkaline series. Geochemical evidence of trace elements such as enrichment for large ion litophile elements (LILEs) and Pb, along with the negative anomaly field strength elements (HFSEs) and Ba and low ratios of Al2O3/(FeOt + MgO+TiO2) and meduim –high (Na2O+ K2O)/ (FeOt+ MgO+TiO2) indicate that origin of initial magma is continental crust that created in a margin of convergent plate. This magma may be formed by partial melting of protolites of lower crustal (e.g. greywacke).