The study covers quantitative correlation and comparison of geothermal gradient data with various explanatory variables for the Gediz Graben, Manisa Province. Although Turkey has a high geothermal potential and is among the top ten countries producing power through geothermal energy, the main resource for power generation still remains to be fossil fuels. Only 1% of the total power generation of Turkey is from geothermal energy. However, the advantageous geological conditions in Turkey along with the technological developments as well as the regulations issued on geothermal energy in the last decade have allowed geothermal energy to be economically favorable. In light of these technological and legislative developments, geothermal exploration in Turkey has accelerated in the recent years especially in Büyük Menderes Graben and Gediz Graben. In Turkey, Gediz Graben currently ranks as second in geothermal energy production having 118 MWe power generation capacity with high potential for further development. Therefore, this study includes the spatial and statistical assessment of the available geothermal well data with geological, seismo-tectonic, topographic, surface temperature and vegetation data within a GIS environment for the Gediz Graben, Manisa Province. Bottom hole temperature and depth data from more than 90 geothermal wells were used to generate a geothermal gradient map. The explanatory datasets were statistically evaluated and their relationship with geothermal gradient has been assessed.

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