Mapping of major tectonic lineaments and a buried basement structure in the SW of central Anatolia – Türkiye, using aeromagnetic data

Abstract

The study area is located in the Anatolide‑Tauride Block which underwent stronger Alpine deformation and regional metamorphism throughout the geological history. This study aimed to identify discontinuities in the SW part of central Anatolia from the magnetic anomaly data. These discontinuities originated from the boundaries of anomalous intrusions and faults within the sedimentary region. For determining their depths, geometries and some other properties, the Reduction to the Pole (RTP), the power spectrum, upward continuation, Analytic Signal (AS), Tilt Angle (TA) and the Theta Angle [cos (𝜃)] methods were used. The spectral analysis showed that the average depths of the deeper and shallow magnetized sources were calculated as 8.64 km and 4.81 km, respectively. The third segment on the spectrum graphics (estimated as 1.96 km) is related with the sedimentary cover units. The results of the upward continuation, AS, TA and cos (𝜃) revealed a magnetic lineation trend generally in the NW‑SE direction and identified a deep‑seated body buried under the sedimentary cover. In general, these magnetic lineaments are interpreted as the fault‑related structures after correlation with the earthquake data and the oval magnetic anomaly is accepted as the product of a magnetic intrusion.