Structural interpretation of the Tuzgolu and Haymana Basins, Central Anatolia, Turkey, using seismic, gravity and aeromagnetic data

Abstract

The Tuzgolu Basin is the largest basin in Central Anatolia. It is connected to the Haymana Basin by a small channel-shaped basin called the Tersakan Basin. The study area has smooth topography with a stable young sedimentary cover and limited outcrop zones, but displays a complex geology with intense active tectonism and poor seismic quality beneath the surface. In the study reported here an attempt was made to determine the subsurface structure of the basement by three-dimensional modelling of gravity data. The seismic and magnetic data were also integrated with the available geological data to check the modelling results. The modelling results suggest that the deeper parts of the Haymana Basin are located to the east of Haymana city centre, at a maximum depth of 8 km, with the exception of the depression to the north, which is located 25 km northwest of Bala city centre at a maximum depth of 10 km. The channel-shaped Tersakan Basin (connecting the Haymana and Tuzgolu Basins) is located west of Lake Tuzgolu, and the deepest part of this basin is approximately 5.5 km. The Tuzgolu Basin has three major depressions: (1) the Southern Aksaray Depression, which is covered by younger volcanic rocks, is the largest but in general the least explored area; (2) the Eregli Depression; (3) the Sultanhani Depression. Almost all of these depressions have an average depth of 8 km; however, some of the deeper segments are at a depth of approximately 12-13 km. Our results suggest the possibility of hydrocarbon potential in these basins.

Crustal Structure of Turkey from Aeromagnetic, Gravity and Deep Seismic Reflection Data

“…Sedimentary basins are clearly apparent. Particularly, central Anatolian (Aydemir 2008(Aydemir , 2011Aydemir and Ates 2006b) and Thrace Basins (Demir et al 2012) are outstanding basins. This geophysical evidence could be well correlated and support the previous geological findings (Sengor and Yilmaz 1981).…”

“…AA 0 shows the location of the profile to be modelled for 2-dimensional gravity and magnetic structures. The location of the deep seismic section GTRS-87-802 is also illustrated structures(Aydemir and Ates 2006a), while the bodies creating gravity anomalies are sedimentary basins(Aydemir 2008(Aydemir , 2011Aydemir and Ates 2006b), and all causative bodies are situated in the upper crust(Figs. 11a, b).…”

Determination of Tectonic and Crustal Structure of the Eastern Pontide Orogenic Belt (NE Turkey) Using Gravity and Magnetic Data

“…Topographic correction was calculated up to a distance of 167 km assuming a terrain density of 2670 kgm -3 . Then, gravity data used in this work were gridded at 2.5 km interval by the MTA (ATES et al, 1999;AYDEMIR and ATES, 2006).…”

“…MTA made all necessary corrections to the survey data and gridded the data with 2.5 km intervals to be used within this research. On the other hand, the geomagnetic gradient was removed from the data using International Geomagnetic Reference Field (IGRF) formulae for the 1982 epoch by the MTA (ATES et al, 1999;AYDEMIR and ATES, 2006).…”

Tectonic investigation of Central Anatolia, Turkey, using geophysical data

“…Age of these volcanic rocks (Late Cretaceous, Mid-Eocene and Late MioceneQuaternary) are identical to the main tectonic periods in the Central Anatolia (Dincer, 1978;Dellaloglu, 1991;Buyuksarac, 2002;Buyuksarac et al, 2005). Sedimentary section in the Tuzgolu Basin was described in comparison with the stratigraphy of Haymana Basin by Aydemir and Ates (2006a) in detail. As a result, it is not repeated in this paper.…”