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To understand the physical and chemical processes (like metamorphism, migmatization, mineralization, and deformity) occurring in rock structures at high temperatures and pressure, the shear zone is one of the tectonic deformational aspects to consider. Eastern Ghats Mobile Belt (EGMB) is one of those regions that accommodated several types of deformities (such as lineaments, folds, faults, and shear zones). The objective of the present study is to identify these types of structural deformities near the Mahanadi River. Magnetotelluric (MT) is an appropriate geophysical method to delineate these types of structural features. For this purpose, nine MT soundings have been recorded across the Mahanadi Shear Zone (MSZ) and Angul-Dhenkanal Shear Zone (ADSZ). The profile covering all these nine MT soundings is oriented almost N-S.
A two-dimensional resistivity model is generated using nine MT soundings. In the model, the shallow subsurface is imaged as the high electrical resistivity across the profile line while the deeper zones show the conductive signature. The resistive shallower region represents the presence of highly metamorphosed rocks. While the well-connected conductive regions with varying depths confirmed the two dipping shear zones which meet at the deeper level.