Neotectonics and seismicity of the Ankara region : a case study in the Uruş area

Kaplan, Tülin
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 Antecedent Kirmir River and its second-order drainage system was first mapped in detail in the present study, and faults determining northern margin of the Çeltikçi depression were named as the Urus fault set comprising the SW part of the Çeltikçi Fault Zone; and the mechanism of the master fault of the Urus fault set was determined as left lateral oblique-slip fault with reverse component by the morphologic markers such as the deformed drainage system and pressure ridges. This was also supported by the fault plane solutions of the 2000.08.22 Urus earthquake. Three fault plane solutions, of which two of them for the 2000.08.22 Urus earthquake, and one of them for the 2003.02.27 Çamlidere earthquake, were done to determine nature of the source. Ground material underlying the city of Ankara were divided into three categories: (a) well-lithified basement rocks, (b) Pliocene fluvio-lacustrine v sedimentary sequence, and (c) unconsolidated terrace and alluvial sediments of Quaternary age. Quaternary unconsolidated sediments are densely populated in Ankara. These sediments are fine-grained and have a maximum thickness of 200 m or more. Inside these sediments, static ground water level is very close (as on average: 6 m) to ground surface. These conditions are quite suitable for liquefaction of these unconsolidated alluvial sediments. In addition,


Post miocene deformation of the area between Alibey (Kızılcahamam) and Karalar (Kazan) villages, nw Ankara (Turkey)
Karaca, Aykut; Rojay, Fuat Bora; Department of Geological Engineering (2004)
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 ...
Tectonomagmatic evolution of bimodal plutons in the central Anatolian crystalline complex, Turkey
Kadioglu, Yk; Dilek, Y; Güleç, Nilgün Türkan; Foland, Ka (University of Chicago Press, 2003-11-01)
The NW-trending Agacoren Intrusive Suite (AIS) on the east side of the Salt Lake (Tuz Golu), Turkey, is part of a curvilinear volcanoplutonic complex along the western edge of the central Anatolian crystalline complex (CACC). Granitoids constitute the predominant lithological group within the AIS and range in composition from monzonite through granite to alkali feldspar granite. Gabbroic rocks occur as irregular intrusive bodies with sinusoidal, irregular contacts with the granitoid plutons and vary from di...
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...
The Upper Cretaceous intrusive rocks with extensive crustal contribution in Hacimahmutusagi Area (Aksaray/Turkey)
Köksal, Serhat (Central Library of the Slovak Academy of Sciences, 2019-06-01)
The Hacimahmutusagi area (Aksaray/Turkey) is located in the western part of the Central Anatolian Crystalline Complex (CACC). Gneiss and marble compose the basement units, while intrusive rocks are gabbros and granitoids. The pegmatitic hornblende gabbros contain pegmatitic to fine-grained hornblendes, plagioclase, clinopyroxene, and accessory opaque minerals. The fine-grained gabbros, on the other hand, are composed of plagioclase, hornblende, and biotite as major components whereas the apatite and opaque ...
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...
Citation Formats
T. Kaplan, “Neotectonics and seismicity of the Ankara region : a case study in the Uruş area,” M.S. - Master of Science, Middle East Technical University, 2004.