Magnetic Fabric As A Tool To Determine Kinematic Vorticity Number Of The High Grade Rocks From Chilka Lake Area, Eastern Ghats Belts, India

The present study aims to determine the nature of strain in the high-grade rocks from Chilka lake area, Eastern Ghats Belt (EGB) by calculating the kinematic vorticity number using the relationship between the magnetic fabrics and the perceptible field fabrics. In the study, it is found that the nature of shear is dependent on the rock types. Here the granulites and migmatites that host the leptynite and anorthosite bodies have relatively lower values for kinematic vorticity number which proves the presence of pure shear component although simple shear component dominates. However, within the anorthosite and leptynite massifs the kinematic vorticity number approaches 1, pointing towards absolute simple shear.