Modeling and interpretation of ground magnetic data associated geothermal resources, north -west of Delijan

Existence of hot springs and geological evidences of north-west of Delijan area indicate that there is an important geothermal system in the depths of study area. In order to investigation geothermal of this area and delineation of geothermal structures with significant magnetic response, a ground magnetic survey was carried out over the hot springs which cover about 300 km2 in 2011. Necessary corrections and reductions were applied over the data. Then investigated the structures associated to the geothermal system using different magnetic map. It was revealed that a main magnetic anomaly in the area and estimated its depth and structural index using Euler method. Results of applying this method indicates a broad magnetic source almost in the depth of more than 2000 m. After Euler method, two other methods applyied over the data: forward modeling and 3D inversion using Model Vision software and Mag3D code, respectively were applied. Mag3D code using of the Li and Oldenburg algorithm gives the best answer based on iteration. Results of these methods show a broad magnetic source in the depth of between 2500 and 5000 m which can be interpreted as the heat source for geothermal system in the area. Results of this work have a good correlation with the known geological evidences.