Usage of Cruie depths for the determination of geothermal areas in the Izmir Bay

It is accepted that crustal rocks lose their magnetisation at the Curie point temperature. At this temperature, ferrimagnetic rocks become paramagnetic. The bottom of magnetised crust determined from the spectral analysis of residual magnetic anomalies is generally interpreted as the level of the Curie point isotherm. An alternative approach to interpretation of magnetic anomalies in terms of body parameters has been achieved by characteristic curves. For this study, the prism model was used and the parameters of the body were determined by curve matching. The residual between the observed and calculated anomalies is minimised by adjusting the model parameters automatically. The Curie depth points can be obtained at bottom of the prism. For that reason several prism should be used to prepare the Curie-depth map