tailieunhanh - Tectonic and structural characteristics of Erzurum and its surroundings (Eastern Turkey): a detailed comparison between different geophysical parameters

The tectonic and structural properties of Erzurum and its surroundings have been investigated by evaluating the seismotectonic b - value, magnetic anomaly, edge detection analysis (total horizontal derivative (THDR) and tilt angle (TA)), Curie Point Depth (CPD), P-wave velocity (Vp), and Vp / Vs (S - wave velocity) ratio and by imaging the regional distributions of these parameters. For this purpose, all parameters have been combined to be able to reveal the new useful results on the study region and are presented for different locations and depths. The Vp values have been accompanied by high Vp / Vs ratios and shallow CPD values in the areas with geothermal regions such as Tekman, Söylemez, and the northern part of Karlıova. | Turkish Journal of Earth Sciences Turkish J Earth Sci 2022 31 85-108 http earth TÜBİTAK Research Article doi yer-2106-18 Tectonic and structural characteristics of Erzurum and its surroundings Eastern Turkey a detailed comparison between different geophysical parameters 1 2 3 4 Çağlar ÖZER Serkan ÖZTÜRK Eren PAMUK 1 Earthquake Research Centre Atatürk University Erzurum Turkey 2 Department of Civil Engineering Engineering Faculty Atatürk University Erzurum Turkey 3 Department of Geophysics Faculty of Engineering and Natural Sciences Gümüşhane University Gümüşhane Turkey 4 Department of Geophysical Research General Directorate of the Mineral Research amp Exploration of Turkey Ankara Turkey Received Accepted Published Online Final Version Abstract The tectonic and structural properties of Erzurum and its surroundings have been investigated by evaluating the seismo- tectonic b - value magnetic anomaly edge detection analysis total horizontal derivative THDR and tilt angle TA Curie Point Depth CPD P-wave velocity Vp and Vp Vs S - wave velocity ratio and by imaging the regional distributions of these parameters. For this purpose all parameters have been combined to be able to reveal the new useful results on the study region and are presented for different locations and depths. The Vp values have been accompanied by high Vp Vs ratios and shallow CPD values in the areas with geothermal regions such as Tekman Söylemez and the northern part of Karlıova. In the tectonically active regions such as Ilıca Dumlu Pasinler Çat Karlıova and Karaçoban high reduction - to the - pole RTP total magnetic anomaly was accompanied by low Vp values in harmony. Besides the low Vp values between 0 and 10 km and high b - values can be related to the weakness zones and the areas in which earthquake hazards are high in the study area. The low Vp values in the 0 km horizontal slice are in accordance with the high RTP total magnetic

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