The geometric symmetry analysis of Kamery shear zone using planar and linear structural elements, Sanandaj-Sirjan metamorphic belt, Iran

Determination of geometry of shear zones will help us to understand the structural evolution of shear zones. Determination of vorticity vector based on 3-D structural studies in many cases is very difficult. Study of lineations, foliations, shear zone boundaries and vorticity normal section are very important and will help us to understand the geometry of shear zones. In this research with application of theoretical aspect of shear zones the main parameters of shear zones geometry were studied. Moreover, for determination of shear sense indicators and deformation geometry a case study was carried out in the Kamery shear zone southwestern Hamedan whitin the Sanandaj-Sirjan metamorphic belt. Our results show occurrence of an important dextral shear component and scattering of lineation and pole of foliation around vorticity normal sectionDeformation temperature analysis based on opening angle of quartz c-axis pattern reveals the deformation temperature between 550±50 to 640±50 °C. Finally, the Triclinic Inclined Transpression model was suggested for structural evolution of this shear zone.