Determination of a geothermal energy field with audio-magnetotelluric (AMT) data at the south of Manisa, Turkey

In this study, we present an investigation of the geothermal energy field and its energy potential at the south of Manisa in Turkey. The resistivities of the geothermal energy field have a key role in determining geothermal energy reservoir and potential in the field. This work focuses on low-resistivity zones in order to determine the geometry and extension of the geothermal system by using the Audio-Magnetotelluric (AMT) method that is to image rock units below the shallow subsurface and determine deeper structure that might represent permeability in a geothermal system. Therefore, AMT stations were arranged with an interval of about 1 km array and its measurements were carried out at 40 sites, which were located on approximately 9.5 km long profiles at the south of Manisa. The resistivity model was obtained from the 2D inversion of AMT data to show subsurface specific conductive and resistive features in the field. As a result, two geothermal anomalies were defined at the study area by using AMT data and the resistivity of soft rock is found generally quite low (