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Examining the crustal structures of eastern Anatolia, using thermal gradient, heat fl ow, radiogenic heat production and seismic velocities (Vp and Vs) derived from Curie Point depth

A. Cirmik


Eastern Anatolia is one of the most active volcanic and tectonic systems, caused by the covergence of Arabian and Anatolian Plates. In this study, the crustal and thermal structures of eastern Anatolia are investigated by using the values derived from Curie Point depth (CPD). The thermal gradient, the radiogenic heat production and seismic compressional velocity (Vp) values of eastern Anatolia are obtained using calculated CPD. Additionally, seismic shear velocities (Vs) of eastern Anatolia are calculated by CPD values for the fi rst time in this study. The calculated Vs values prove consistent with the Vs values obtained by a previous seismic study. Therefore, it can be said that Vs values can be obtained for an area that includes the aeromagnetic data in the case of absence of seismic studies. Finally, the heat fl ow and Vs values are evaluated with the focal depth distribution of the earthquakes to investigate the crustal features. The existence of high heat flow, high seismicity and low Vs values along the eastern Anatolian Fault Zone and around Karliova Triple Junction indicate that these regions have high geothermal potential.