¹ Dokuz Eylul University, Faculty of Engineering, Department of Geophysics, 5160 Buca - Izmir, TURKEY

Abstract: Temperature in the earth is one of the most important parameters in models for the constitution and active tectonics of the crust. However this subject is most poorly known. A boundary condition on temperature at depth in the continental crust can be principle to obtained by mapping the curie isotherm where it forms the base of magnetic crust. At the Curie temperature, a substance loses cause to magnetic polarization. Consequently, it may be possible to locate a point on the isothermal surface by determining the depth to the bottom of a polarized rock mass. If enough depths can be determined, an isothermal surface at the Curie temperature can be defined. An approach to map the magnetic crustal thickness using satellite magnetic anomaly data could be described. In this study, the moving windows power spectrum and other power spectrum methods based on spectrum analysis have been applied to the total component Magsat data of the Western Anatolian Region and Curie depths were determined. Then, heat flow values were determined with regard to the region by using the depths and taking into consideration of heat conductivity (2 W/m⁰C). In conclusion, the results of both methods were compared and interpreted for the aforementioned region. Moreover, the heat flow values derived from the Curie depths, which has found through the application spectral analysis were interpreted with the tectonic structure whether are in association. Additionally, prominent geothermal fields in the region were investigated together with their computed heat flow values.