The internal structure of Beypazarı Blind Thrust Zone around Çayırhan

Year 2020, Volume: 163 Issue: 163, 77 - 97, 15.12.2020

Anıl Ardahanlıoğlu , Gürol Seyitoğlu , Korhan Esat

https://doi.org/10.19111/bulletinofmre.651712

Abstract

The Beypazarı Blind Thrust Zone, which is surrounded by the North Anatolian, the Eskişehir, and the Kırıkkale-Erbaa fault zones, is a recently defined neotectonic structure developed in the NW central Anatolia together with the Eldivan-Elmadağ and the Abdüsselam Pinched Crustal Wedges. In this study, the internal structure of the Beypazarı Blind Thrust Zone has been examined in detail around Çayırhan region. It has been defined that it consists of the Karaköy, Sekli, Nalçabayırı, Uzunbayır blind thrusts, Davutoğlan Back Thrust, and Beypazarı Blind Thrust I-II from North to south, respectively with help of the fault-propagation folds in the study area. The existence of economically important and operational resources such as lignite and trona in the Neogene sequence affected by these faults in the region and earthquake generating potential of the faults determined in previous studies increase the importance of this study.

Keywords

Central Anatolia, Neotectonics, Blind thrust fault, Earthquake, Faultpropagation fold

Thanks

This article is a part of the MSc thesis of the first author who is about to complete it in the Tectonics Research Group of Ankara University. It was benefited from the field support given by the Faculty of Engineering of Ankara University to the “Advanced Geological Mapping” courses. We appreciate a lot for this opportunity. In addition, we would like to thank to Efe Demirci, the member of the Tectonics Research Group, for his contributions during field studies and to referees Prof. Dr. Yaşar Eren and Assoc. Prof. Dr. Volkan Özaksoy for their constructive contributions.

References

• Aksoy, C.O., Onargan, T., Yenice, H., Küçük, K., Köse, H. 2006. Determining the stress and convergence at Beypazarı trona field by three-dimensional elastic-plastic finite element analysis: A case study. International Journal of Rock Mechanics and Mining Sciences 43, 166-178.
• Allmendinger, R.W., Cardozo, N.C., Fisher, D. 2012. Structural Geology Algorithms: Vectors and Tensors. Cambridge University Press, 289 p.
• Apaydın, A. 2010. Relation of tectonic structure to groundwater flow in the Beypazarı region, NW Anatolia, Turkey. Hydrogeology Journal 18, 1343- 1356.
• Bechtel, A., Karayiğit, A.İ., Sachsenhofer, R.F., İnaner, H., Christanis, K., Gratzer, R. 2014. Spatial and temporal variability in vegetation and coal facies as reflected by organic petrological and geochemical data in the Middle Miocene Çayırhan coal field (Turkey). International Journal of Coal Geology 134/135, 46-60.
• Demirci, C.Y. 2000. Structural Analysis in Beypazarı-Ayaş- Kazan-Peçenek Area, NW of Ankara (Turkey). Doktora Tezi, Orta Doğu Teknik Üniversitesi Fen Bilimleri Enstitüsü, 178 s, Ankara.
• Diker, S., Çelik, M., Kadıoğlu, Y.K. 2006. Fingerprints of the formation of geothermal springs on the granitoids: Beypazarı-Ankara, Turkey. Environmental Geology 51, 365-375.
• Emre, Ö., Duman, T.Y., Özalp, S., Elmacı, H., Olgun, Ş., Şaroğlu, F. 2013. Türkiye Diri Fay Haritası. Maden Tetkik ve Arama Genel Müdürlüğü, Özel Yayın Serisi 30, Ankara.
• Esat, K. 2011. Ankara çevresinde Orta Anadolu’nun neotektoniği ve depremselliği. Doktora Tezi, Ankara Üniversitesi Fen Bilimleri Enstitüsü, 144 s, Ankara.
• Esat, K., Seyitoğlu, G. 2010. Neotectonics of North Central Anatolia: A strike-slip induced compressional regime. Tectonic Crossroads: Evolving Orogens of Eurasia-Africa-Arabia, 4-8 October 2010, Ankara, p.38.
• Esat, K., Çıvgın, B., Kaypak, B., Işık, V., Ecevitoğlu, B., Seyitoğlu, G. 2014. The 2005-2007 Bala (Ankara, Central Turkey) earthquakes: a case study for strike-slip fault terminations. Geologica Acta 12(1), 71-85.
• Esat, K., Kaypak, B., Işık, V., Ecevitoğlu, B., Seyitoğlu, G. 2016. The Ilıca branch of the southeastern Eskişehir Fault Zone: an active right-lateral strike-slip structure in central Anatolia, Turkey. Bulletin of the Mineral Research and Exploration 152, 25-37.
• Esat, K., Seyitoğlu, G., Ecevitoğlu, B., Kaypak, B. 2017. Abdüsselam Kıstırılmış Tektonik Kaması: KB Orta Anadolu’da daralma rejimiyle ilişkili bir Geç Senozoyik yapısı. Yerbilimleri 38, 33-56.
• Garcia-Veigas, J., Gündoğan, İ., Helvacı, C., Prats, E. 2013. A genetic model for Na-carbonate mineral precipitation in the Miocene Beypazarı trona deposits, Ankara province, Turkey. Sedimentary Geology 294, 315-327.
• Helvacı, C. 2010. Geology of the Beypazarı trona field, Ankara, Turkey. Tectonic Crossroads: Evolving Orogens of Eurasia-Africa-Arabia, Ankara, Turkey. Mid-congress field exursions guide book, 1-33.
• Helvacı, C., Yılmaz, H., İnci, U. 1981. Beypazarı (Ankara) yöresi Neojen tortullarının kil mineralleri ve bunların dikey ve yanal dağılımı. Jeoloji Mühendisliği Dergisi 32/33, 33-42.
• Helvacı, C., Öztürk, Y.Y., Satır, M., Shang, K.C. 2014. U-Pb zircon and KAr geochronology reveal the emplacement and cooling history of the Late Cretaceous Beypazarı granitoid, central Anatolia, Turkey. International Geology Review 56(9), 1138-1155. DOI: 10.1080/00206814.2014.921795
• İnci, U. 1991. Miocene alluvial fan-alkaline playa lignitetrona bearing deposits from an inverted basin in Anatolia: sedimentology and tectonic controls on deposition. Sedimentary Geology 71, 73-97.
• Kalafatçıoğlu, A., Uysallı, H. 1964. Geology of The Beypazarı - Nallıhan - Seben Region. Bulletin of the Mineral Research and Exploration 62, 1-11.
• Karadenizli, L. 1995. Beypazarı havzası (Ankara batısı) üst Miyosen-Pliyosen jipsli serilerinin sedimantolojisi. Türkiye Jeoloji Bülteni 38, 63-74.
• Kavuşan, G. 1993a. Beypazarı-Çayırhan linyitleri hümik asitlerin IR-Spektrofotometrik incelenmesi. Bulletin of the Mineral Research and Exploration 115, 91-98.
• Kavuşan, G. 1993b. Beypazarı-Çayırhan kömür havzası linyitlerinin yataklanmasında tektonizmanın önemi. Doğa-Türk Yerbilimleri Dergisi / Turkish Journal of Earth Sciences 2, 135-145.
• Kazancı, N. 2012. Kuvaterner birimlerinin haritalanması. Kazancı, N., Gürbüz, A. (Ed.), Kuvaterner Bilimi. Ankara Üniversitesi Yayını 350, 463-470.
• Lisenbee, A.L., Uzunlar, N., Terry, M. 2010. The Davutoglan Wrench Fault: Intra-Anatolian Plate, Neogene Deformation, Ankara Province, Turkiye. Tectonic Crossroads: Evolving Orogens of Eurasia-Africa-Arabia, 4-8 October 2010, Ankara, p.38.
• Marrett, R., Allmendinger, R.W. 1990. Kinematic analysis of fault-slip data. Journal of Structural Geology 12(8), 973-986.
• Orti, F., Gündoğan, İ., Helvacı, C. 2002. Sodium sulphate deposits of Neogene age: the Kirmir Formation, Beypazarı basin, Turkey. Sedimentary Geology 146, 305-333.
• Özçelik, O. 2002. Beypazarı (Ankara) kuzeyinde Miyosen yaşlı bitümlü birimlerin organik jeokimyasal özellikleri. Türkiye Jeoloji Bülteni 45, 1-17.
• Özçelik, O., Altunsoy, M. 2005. Organic geochemical characteristics of Miocene bituminous units in the Beypazarı basin, central Anatolia, Turkey. The Arabian Journal for Science and Engineering 30, 181-194.
• Özgüm, C., Gökmenoğlu, O., Erduran, B. 2003. Ankara, Beypazarı doğal soda (trona) sahası izotop hidrolojisi çalışmaları. Jeoloji Mühendisliği Dergisi 27, 3-16.
• Özpeker, I., Çoban, F., Esenli, F., Eren, R.H. 1991. Miyosen yaşlı Hırka formasyonundaki (Beypazarı-Ankara) dolomitlerin mineralojik özellikleri. Türkiye Jeoloji Bülteni 34, 23-26.
• Pehlivanlı, B.Y., Koç, Ş., Sarı, A., Engin, H. 2014. Factors controlling low Uranium and Thorium concentrations in the Çayırhan Bituminous shales in the Beypazarı (Ankara) area, Turkey. Acta Geologica Sinica 88, 248-259.
• Randot, J. 1956. 1/100.000 lik 39/2 (Güney kısmı) ve 39/4 nolu paftaların jeolojisi. Seben-Nallıhan- Beypazarı ilçeleri. Maden Tetkik ve Arama Genel Müdürlüğü, Rapor No: 2517, Ankara (unpublished).
• Seyitoğlu, G., Aktuğ, B., Karadenizli, L., Kaypak, B., Şen, Ş., Kazancı, N., Işık, V., Esat, K., Parlak, O., Varol, B., Saraç, G., İleri, İ. 2009. A late Pliocene - Quaternary pinched crustal wedge in NW Central Anatolia, Turkey: a neotectonic structure accommodating the internal deformation of the Anatolian Plate. Geological Bulletin of Turkey 52(1), 121-154.
• Seyitoğlu, G., Ecevitoğlu, B., Kaypak, B., Güney, Y., Tün, M., Esat, K., Avdan, U., Temel, A., Çabuk, A., Telsiz, S., Uyar Aldaş, G. 2015. Determining the main strand of the Eskişehir strike-slip fault zone using subsidiary structures and seismicity: a hypothesis tested by seismic reflection studies. Turkish Journal of Earth Sciences 24, 1-20
• Seyitoğlu, G., Esat, K., Kaypak, B. 2017a. One of the main neotectonic structures in the NW central Anatolia: Beypazarı Blind Thrust Zone and related fault- propagation folds. Bulletin of the Mineral Research and Exploration 154, 1-14.
• Seyitoğlu, G., Esat, K., Kaypak, B. 2017b. The neotectonics of southeast Turkey, northern Syria and Iraq: the internal structure of the South East Anatolian Wedge and its relationship with the recent earthquakes. Turkish Journal of Earth Sciences 26, 105-126.
• Siyako, F. 1983. Beypazarı (Ankara) linyitli Neojen havzası ve çevresinin jeoloji raporu. Maden Tetkik ve Arama Genel Müdürlüğü, Rapor No: 7431, 46 s., Ankara (unpublished).
• Suner, M.F. 1993. The Beypazarı trona deposits. Földtani Közlöny 123(3), 271-282.
• Şahin, M., Yaltırak, C., Karacık, Z. 2019. A case study of compression to escape tectonic transition: Tectonic evolution of the Nallıhan Wedge and comparison with the Tercan Wedge (Eastern Mediterranean, Turkey). Journal of Asian Earth Sciences 174, 311-331.
• Şaroğlu, F., Emre, Ö., Kuşçu, İ. 1992. 1/1.000 ölçekli Türkiye diri fay haritası. Maden Tetkik ve Arama Genel Müdürlüğü, Ankara.
• Şener, M. 2007. Depositional conditions of the coal-bearing Hırka Formation beneath Late Miocene explosive volcanic products in NW central Anatolia, Turkey. Journal of Earth System Science 116, 125-135.
• Yağmurlu, F., Helvacı, C., İnci, U., Önal, M. 1988. Tectonic characteristics and structural evolution of the Beypazarı and Nallıhan Neogene basin, central Anatolia. METU Journal of Pure and Applied Sciences 21, 127-143.