Finite strain and vorticity of flow analyses were carried out within the Deh Vazir deformed conglomerates
in the Sanandaj-Sirjan metamorphic belt (Zagros Mountains, Iran). This belt is in a sequence of tectonometamorphic complexes made of low- to high-grade metamorphic rocks affected by a polyphase deformation history. Using Rf/u technique for two-dimensional strain analysis showed that the finite strain of
XZ plane is RS = 3.7 ± 0.70. The calculation of the harmonic mean from the axial ratios of the extracted
pebbles and plotting these data in the Flinn diagram resulted in K = 0.7 ± 0.38 (i.e. oblate strain ellipsoid).
Kinematic vorticity analysis of deformed pebbles showed that WK parameter is 0.59 ± 0.10 (i.e. pureshear dominated non-coaxial flow). The results quantitatively support the recognition of a partitioned
dextral inclined transpressive regime with bulk triclinic symmetry along the Sanandaj-Sirjan metamorphic belt resulted from the oblique collision between the African–Arabian continent and the Iranian
microcontinents
