Magnetotelluric (MT) is a passive exploration technique that utilizes a broad spectrum of naturally occurring geomagnetic variations and natural electric field as a power source measurable at the earth's surface, to investigate the distribution of electrical resistivity in the subsurface.The depth of investigation of MT method is much higher than that of other electromagnetic methods.The Zagros erogenic belt of Iran, as part of the Alpine-Himalayan mountain chain, extends for about 2000 km in a NW-SE direction from the East Anatolian Fault of eastern Turkey to the Oman Line in southern Iran. The Zagros erogenic belt is the result of the opening and closure of the Neo-Tethys oceanic realm. In July 2010 a new magnetotelluric (MT) survey across Zagros area carried out to recognize the geological formations and features. Arak is located in the central of Iran. MT measurements were planned at 32 sites over a length of 160 km along an E-W profile from Arak to Broujerd. We obtained one-dimensional (1-D) and two-dimensional (2-D) inversion models using codes from Pedersen (2004) and Siripunvaraporn and Egbert (2000). As results, we could respectively depict the geological structure in the area by recognition the fault zone of Talkhab fault.


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