Interpretation of Suluklu-Cihanbeyli-Goloren Magnetic Anomaly, Central Anatolia, Turkey: An integration of geophysical data

The most obvious aeromagnetic anomaly in Turkey is the Suluklu-Cihanbeyli-Goloren Anomaly which is extending in NW–SE direction, along the western margins of the Haymana, Tersakan and Tuzgolu Basins in the Central Anatolia. The surface conditions, either topography or surface geology, are not related to this anomaly and do not reflect any characteristic features of the causative body buried in the subsurface. This evident anomaly was modelled two-dimensionally (2D) from the aeromagnetic and gravity data along the two different profiles taken in two different locations around the Lake Tuzgolu. The modelling results were compared and verified by the seismic and well data. According to the results obtained from this study, the Suluklu-Cihanbeyli-Goloren Anomaly is produced by a magmatic mass located at the boundary of the Kirsehir Block and Menderes-Taurus Platform. The models suggest that shape of the causative body is an inclined, 2 km thick magmatic dike and its posture changes becoming to a sill-like body at the depth around 2500 m. Its southernmost extremity is ended and exposed at the Goloren Mountain that is a small-scale volcanic high. The causative magmatic body is thought to be revealed from a basin related normal fault that was activated at the end of Cretaceous through the Paleocene-Eocene time. The fault activation and magmatic intrusion ceased in the Eocene and the intrusive body was completely covered by the Mio-Pliocene sediments. Seismological records show that the buried fault zone can be considered inactive in the recent times.