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The assessment of heat sources and fracture zones forming geothermal reservoirs is essential task of the geothermal resources exploration. The trial was made through the integrated analysis of the gravity and magnetic data using 2 layers (tuff and basement rock) model. Regional correlation between gravity and pseudo-gravity was analyzed, and the magnetic effects arising from only possible vertical and horizontal intrusive rocks were respectively extracted. The results are encouraging to assess the evaluation of the fracture zones and its relation with the possible heat sources.