Analysis of potential field anomalies in Pasinler-Horasan basin, Eastern Turkey

Kenan Gelisli and Nafiz Maden

Karadeniz Technical University, Department of Geophysical Engineering, TR-61080 Trabzon, Turkey

Abstract: This study was carried out in the Pasinler-Horasan basin (Eastern Turkey), where sedimentary rocks of the Neotectonic period (from Eocene up to present day) outcrop and exhibit considerable oil and coal potential. This basin extends approximately in the E-W direction, is surrounded by the Pontides to the north and the Bitlis Mountains to the south and its basement is of pre-Miocene age. In this study, the tectonic structure of the Pasinler-Horasan basin was examined by using gravity and magnetic data. A full horizontal derivative map was computed from the gravity data. The power spectrum method was applied on the Bouguer gravity data of the region. The estimated average sedimentary basin thickness and Moho depth are equal to 4.7 km and 42.9 km, respectively. The average Curie point depth was also calculated as 18.4 km from magnetic data, which indicates a magnetic body within the lower crust (LC)