Post miocene deformation of the area between Alibey (Kızılcahamam) and Karalar (Kazan) villages, nw Ankara (Turkey)

Karaca, Aykut
The study area is located within the Neogene-Quaternary sequences on top of the Mesozoic accreted mass at the northwest of Kazan (40 km NW of Ankara) between Karalar and Alibey villages. The research deals with the post-Miocene deformational history of an area situated at the southern edge of Galatian Volcanic Province. Two main Neogene rock sequences are cropped out; 1) Late Miocene Pazar Formation, 2) Plio-Quaternary Sinap Formation. The Pazar Formation has a succession composed mainly of clastics at the bottom and, cherts and limestones to the top of the sequence representing a fresh water lake environment. Sedimentation seems to be affected by the intense volcanism going on in the Galatian Volcanic Province. Location of a mammalian fossil found in the Pazar Formation yielded a possible time interval between MN-9 to MN-13 (Middle to Late Miocene). Sinap Formation overlies the Pazar Formation unconformably and it is dominantly represented by fluvial clastics. The post-Miocene deformational studies based on the analysis of the structural data collected from bedding planes and fault planes. Totally 213 dip-strike measurements from the Neogene units and 204 slip lineation data from the fault planes were taken. Fold analysis of dip and strike measurements taken from the Pazar Formation gave a common fold axis trending in N430E direction. Similarly fold analysis for the Sinap Formation resulted N400E striking trend for the fold axis. Stress analysis was performed by processing slip lineation data using Angelier direct inversion method. In the analysis, no reliable results for the post-Miocene compressional phase could be obtained. But the results of the post-Plio-Quaternary extensional regime are strongly reliable. It clearly gives an extension in NW-SE direction. Stress analysis together with the field observations show that the area has been structurally evolved in


Neotectonics and seismicity of the Ankara region : a case study in the Uruş area
Kaplan, Tülin; Koçyiğit, Ali; Department of Geological Engineering (2004)
Study area, the Urus province, is located 70 km WNW of city of Ankara. Major settlements in the study area are two counties, Urus and Güdül; and there are a number of villages, such as, from W to E, Macun, Yogunpelit, Kabaca, Üregil, Özköy, Tahtaciörencik, Kirkkavak, Kavaközü, Kayi and Karacaören. The study area is 189 km2 in size and included in 1/25000-scaled topographic quadrangles of H28a3, a4, d1 and d2. The Güdül- Urus section of the Çeltikçi morphotectonic depression (Çeltikçi Basin) drained by the A...
Neotectonics and evolution of the Eskipazar Basin, Karabük ا Turkey
Biryol, C. Berk; Koçyiğit, Ali; Department of Geological Engineering (2004)
Study area, the Eskipazar Basin, is located in the western part of the North Anatolian Fault System. It is a 3-5 km wide, 10 km long and NWSE trending depression, bounded by a complex array of oblique-slip normal faults and strike-slip faults. The Eskipazar Basin is interpreted to be a superimposed basin. The basin fill is composed of two different units deposited under the control of different tectonic regimes, namely the paleotectonic and the neotectonic regimes. The latest paleotectonic fill of the basin...
Neotectonics and evolution of the yeniçağ basın, Bolu-Turkey
Arca, M Serkan; Koçyiğit, Ali; Department of Geological Engineering (2004)
Study area, the Yeniçaga Basin, is located in the western part of the North Anatolian Fault System. It is a 1-5-km-wide and 14-km-long WSWENE- trending depression bounded by a complex array of strike-slip faults. The Yeniçaga Basin is interpreted to be a fault ا wedge basin with the North Anatolian Fault̕s System Master Strand, namely the Gerede Fault, cutting across the basin itself. The basin and its surroundings contain mainly two groups of rock units namely the paleotectonic units and the neotectonic un...
Post-miocene tectonic evolution of Alidağ anticline, Adiyaman, Turkey
Seyrek, Emre; Rojay, Fuat Bora; Department of Geological Engineering (2008)
Adıyaman region is situated within SE Anatolian Fold and Thrust Belt which is a part of Alpine-Himalayan Mountain Belt system. The Belt is evolved as Eurasian plate and Arabian plate amalgamates in SE Anatolia. There are two main contractional deformational periods, Late Cretaceous and Late Miocene, which are followed by a strike slip deformation, during post-Late Miocene characterizing the tectonics of SE Anatolia. Series of folds and thrusts have a trend of almost ENE-WSW direction. The analysis on beddin...
Post-late cretaceous rotational evolution of neotethyan sutures around Ankara region
Özkaptan, Murat; Kaymakcı, Nuretdin; Özacar, Atilla Arda; Department of Geological Engineering (2016)
The central Anatolia comprises various continental fragments belonging to Laurasia at the north and Gondwana at the south. These amalgamated continental fragments (micro continents) delineated by ophiolitic remnants of Tethyan oceanic lithosphere which were consumed due to ~N to S convergence. Around Haymana Basin the closure of the Neotethys Oceans lead to amalgamation of the Pontides (Laurasian affinity) in the north, Tauride and Kırşehir blocks (Gondwana affinity) in the south. The main purpose of this s...
Citation Formats
A. Karaca, “Post miocene deformation of the area between Alibey (Kızılcahamam) and Karalar (Kazan) villages, nw Ankara (Turkey),” M.S. - Master of Science, Middle East Technical University, 2004.