Structural analysis and temperature assessment of the shear zone in SE- Qorveh, Kurdistan

Qorveh area is located in SE-Kurdistan province, in NW- Sanandaj-Sirjan metamorphic-plutonic band. In SE-Qorveh, parts of granitic intrusive and dykes are emplaced in a shear zone after they formed. Based on differences rate of strain and progressing of mylonitization, Shear band of granite show varied treatment such as protomylointe and mylonite (50 Cm to up to 100 M). Often, mylonitic foliation in granitic mylonite has NW-SE strike toward NE plunging and also some of them show folding. Plunging of lineations is low-medium toward NE plunging. Shear sense indicators (e.g. foliation, lineation, C & S shear bands, mica fish and mantled prophyroclstes) in this shear zone show revers slip with right lateral component movement. Microstructural evidence are such as smokey extinction, sub grain, new grain, polycrystalline bands, SGR, BLG, GBM in quartz, shear fracturing, flame perthite, myrmekite, emplaced microcline, rounding and pressure shadow in plagioclase.  All of these evidence show structural changes occurred in up to 300 to 570 C.