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Determination of tectonic and crustal structure of Bitlis–Pötürge Suture Zone using WGM2012 complete Bouguer anomaly data

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Abstract

To investigate the crustal structure of the Bitlis–Pötürge Suture Zone and its vicinity, gravity complete Bouguer anomaly data obtained from the World Gravity Map (WGM2012) were analyzed using Spectral Depth Estimation, Frequency Filtering, Total Horizontal Derivative (THD) and Parker-Oldenburg inversion techniques. The THD method was applied to the data after band-pass filtering of Bouguer gravity data in order to image the discontinuities in the basement levels which are determined by the critical wave numbers determined from the amplitude spectrum of gravity complete Bouguer anomaly data. The maximum amplitude values of the THD were used to reveal the discontinuities caused by the density difference in the BPSZ and its vicinity. In addition, the basement upper surface topography of the region was calculated and mapped with the inverse solution. The presence of an uplift area that is an antiroot in the south of the study area, as well as the subsidence that is a root of the BPSZ was determined. As a result of the inverse solution, it was determined that the depth of the sedimentary basement in the south approximately reaches 6 km and was detected the presence of approximately 7 km thick sedimentary deposit on the BPSZ. Basement upper surface depth is calculated as 8 km in average under the Eastern Anatolian High Plateau.

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  1. Department of Geophysical Engineering, Karadeniz Technical University, 61080, Trabzon, Turkey

    Ali Elmas

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Elmas, A. Determination of tectonic and crustal structure of Bitlis–Pötürge Suture Zone using WGM2012 complete Bouguer anomaly data. Acta Geod Geophys 57, 215–229 (2022). https://doi.org/10.1007/s40328-021-00353-5

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