Akademik Veri Yönetim Sistemi
Journal of Geophysics and Engineering, cilt.22, sa.2, ss.652-661, 2025 (SCI-Expanded)
Extensional continental settings enable favourable hydraulic conditions for fault-controlled (non-magmatic) geothermal systems by secondary permeability around the fault zones as well as having high basal heat flow. In this study, we calculated the geodetically derived crustal dilatation rates from a recently published homogenized GNSS dataset and compared with the maximum temperatures of the known geothermal systems in Türkiye. We observed that low-temperature ( < 100◦C) geothermal systems are found in areas of active deformation (faulting) and independent of type of tectonic setting. Conversely, high-temperature systems ( > 150◦C) are exclusively found within the areas of regional extensional zone of the Western Anatolia Extensional Province (WAEP). In WAEP, we observe that all sites with high temperatures ( > 150◦C) are located within the 20 n-strain/a zone, and all very-high-temperature systems ( > 200◦C) are located within the 50 n-strain/a zone. We also present numerical geothermal models of various normal fault displacement scenarios that represent different extension rates. The calculated temperatures along the active fault zone are similar to the values observed in WAEP. Our numerical modelling results confirm that large-displacement normal faults can naturally provide favourable structural and hydrologic conditions for very-high-temperature ( > 200◦C) geothermal systems observed in WAEP.