Mylonitic rocks formed as a result of heterogeneous shear strain in the ductile shear zone, and their fabric directly related to the strain rate, finite strain ellipsoid shape and orientation (Watts and Williams, 1983; Zhang et al., 2010; Mulchrone and Talbot, 2014; Fossen and Cavalcante, 2017).
The thin section feature has been used for determination of sense of shear, the intensity of deformation, P-T condition in the shear zone and deciphering strain ellipsoid shape.
For calculating the strain ellipsoid shape in the ore-bearing shear zone in the study area, applied a suite of the geological program developed by (Mookerjee and Nickleach, 2011) and written in the Mathematica.
Strain ellipsoid geometry provides important data about deformation history in the shear zone (Mookerjee and Nickleach, 2011).
For the visualized the strain ellipsoid shape and interpretation data all principle axes measurement in the XY and YZ plotted to the Flinn diagram.
The first deformation phase is dynamo-thermal regional event could be coincides with the closure of Neo-Tethys in the Zagros orogeny and propagated a penetrative spaced foliation under the flattening conditions and nearly oblate strain ellipsoid. The second phase followed by the contraction in the suture zone and accommodated by the transpressional ductile shear zone.
(1) Calculate the relative axial length of the strain ellipses by GS method (refer Hayashi, 1994,2001).(2) Calculate the shape tensor of the strain ellipsoid that is constructed from the strain ellipses by the least square strain technique.
The technique that constructs strain ellipsoid from three strain ellipses measured on non-parallel sections based on the least square method and the factors that control precision of strain.
Other subjects covered include landslides and fluvial catchments triggered by the December 1908 Messina Strait earthquake, earthquake and fault propagation, and a universal method to compute the finite strain ellipsoid
for any strain combinations.