LATE PERMIAN UNCONFORMITY AROUND ANKARA AND NEW AGE DATA ON THE BASEMENT ROCKS, ANKARA, TURKEY

At southwest of Gölbaşı (Ankara) there are two different sequences in tectonic contact. The one at the bottom with low-degree metamorphism is represented by phyllite, metabasite, crystallized limestone, schist and quartz porphyry veins. Above them are early Carboniferous-late Permian neritic and pelagic carbonates which are unconformably overlain by late Permian clastics and carbonates. Samples collected from neritic carbonates yielded early Carboniferous (Visian-Serpuhovian) to middle Carboniferous (Bashkirian- Moskovian) ages. These carbonates of shallow facies character are overlain by radiolarite- bearing pelagic deposits of middle Carboniferous-Permian age. Fossils from the upper most neritic carbonates gave Kubergandian-Murgabian age.  This Permo-Carboniferous sequence is unconformably overlain by a sequence consisting of clastics and carbonates. Basal conglomerates and sandstones contain abundant quartz and fewer amounts of carbonated-cemented metamorphic rock fragments and they change to medium-thick bedded dolomitic limestone and limestones to the top. The age of these carbonates of shallow marine character is found Murgabian-Dorashamian. It is suggested that late Paleozoic carbonate basement was deposited in a neritic environment during early-middle Carboniferous, in a pelagic environment during middle Carboniferous-Permian and again in a neritic environment during Kubergandian-Murgabian. Following a deformation stage, it was accreted onto the Variscan basement at north and carbonate deposition took place as a result of late Permian transgression and finally some of exotic blocks within the upper Karakaya Complex were derived from this basement.

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  • Adamia, S.A., Lordkipanidze, M.B., Zakariadze, G.S. 1977. Evolution of an active continental margin as exeplified by the Alpine history of the Caucasus. Tectonophysics 40, 183-189.
  • Adamia, S.A., Bayraktutan, S., Lordkipanidze, M. 1995. Structural Correlation and Phanerozoik Evolution of the Caucasus-Eastern Pontides. Erler, A., Ercan, T., Bingöl, E., Örçen, S. (Ed). Proceeding of an international semposium on the Geology of the Black Sea Region, September 7-11, Ankara, Turkey, General Directorate of Mineral Research and Exploration and Chamber of Geological Engineers, Ankara, Turkey, 69-75.
  • Alp, D. 1972. Amasya yöresinin jeolojisi (Geology of the Amasya Region). İstanbul Üniversitesi Fen Fakültesi Monografileri 22.
  • Akdeniz, N. 1988. Permian and Carboniferous of Demirö- zü and their significance in the regional structure. Geological Bulletin of Turkey 3, 71-80.
  • Akyürek, B., Bilginer, E., Dağer, Z., Sunu, O. 1979. Hacı- lar (K. Çubuk-Ankara) bölgesinde Alt Triyas’ın varlığı. Türkiye Jeoloji Kurumu Bülteni 22,2, Ankara.
  • Akyürek, B., Bilginer, E., Çatal, E., Dağer, Z., Soysal, Y., Sunu, O. 1980. Eldivan-Şabanözü (Çankırı) ve Ha- sayaz-Çandır (Kalecik-Ankara) dolaylarının jeolojisi. Maden Tetkik ve Arama Enstitüsü Rapor No: 6741, Ankara (unpublished).
  • Akyürek, B., Bilginer, E., Akbaş, E., Hepşen, N., Pehlivan, Ş., Sunu, O., Soysal, Y., Dağer, Z., Çatal, E., Sözeri, B., Yıldırım, H., Hakyemez, Y. 1982. Ankara- Elmadağ-Kalecik dolayının jeolojisi. Maden Tetkik ve Arama Genel Müdürlüğü Rapor No: 7298, Ankara (unpublished).
  • Akyürek, B., Soysal, Y. 1983. Biga yarımadası güneyinin (Savaştepe-Kırkağaç-Bergama-Ayvalık) temel jeoloji özellikleri (Basic geological features of the region south of the Biga Peninsula, Savaştepe-Kırkağaç-Bergama-Ayvalık). Maden Tetkik ve Arama Dergisi 95/96, 1-13.
  • Akyürek, B., Bilginer, E., Akbaş, B., Hepşen, N., Pehlivan, Ş., Sunu, O., Soysal, Y., Dağer, Z., Çatal, E., Sözeri, B., Yıldırım, H., Hakyemez, Y. 1984. Ankara-Elmadağ-Kalecik dolayının temel jeolojik özellikleri (Basic geological features of the Ankara-Elmadağ-Kalecik region). Türkiye Jeoloji Kurumu Bülteni 20, 31-46.
  • Altıner. D., Koçyiğit, A. 1993. Third remark on the geo- logy of the Karakaya basin. An Anisian megablock in northern central Anatolia; micropaleontologic, statigraphic and tectonic implications for the rif- ting stage of Karakaya basin, Turkey. Revue de Paleobiologie 12, 1-17.
  • Altıner, D., Özkan-Altıner, S., Koçyiğit, A. 2000. Late Permian foraminiferal biofacies belts in Turkey: pale- ogeographic and tectonic implication. Bozkurt, E.,Winchester, J.A., Piper, J.A.D. (Ed). Tectonic and Magmatism in Turkey and Surrounding Area. Geological Society, London, Special Publication 173, 83-96.
  • Aydın, M., Demir, O., Özçelik, Y., Terzioğlu, N., Satır, M. 1995. A Geological Revision of İnebolu, Devrekani, Ağlı and Küre Areas: New Observations in Paleotethys-Neotethys Sedimentery Successions. Erler, A., Ercan, T., Bingöl, E., Örçen, S. (Ed). Proceeding of an international semposium on the Geo- logy of the Black Sea Region, September 7-11,1992, Ankara, Turkey, General Directorate of Mineral Research and Exploration and Chamber of Geological Engineers, Ankara, 33-38.
  • Bingöl, E. 1968. Contribution a’l’ etüde geologıque de la parti centrale et sud-Est du massif de Kazdağ (Turquie). These faculty of Science University of Nancy (France), 189 p (unpublished).
  • Bingöl, E., Akyürek, B., Korkmazer, B. 1975. Biga yarıma- dasının jeolojisi ve Karakaya Formasyonunun bazı özellikleri (The geology of the Biga Peninsula and some features of the Karakaya Formation). Cumhuriyetin 50. Yılı Yerbilimleri Kongresi Tebliğleri, Maden Tetkik ve Arama Enstitüsü Dergisi, 70-77 (in Turkish with English abstract).
  • Bragin, N. Y., Tekin, U. K., Özçelik, Y. 2002. Middle Ju- rassic radiolarians from the Akgöl Formation, cen- tral Pontides, northern Turkey. Neues Jahrbuch für Geologie und Palaontologie, Monatshefte 2002/10, 609-628.
  • Çapkınoğlu, Ş., Bektaş, O. 1999. Karakaya Kompleksine ait Karasenir Formasyonu (Amasya) içindeki ki- reçtaşı olistolitlerinden Erken Devoniyen kono- dontları. Maden Tetkik ve Arama Dergisi 120, 159- 170.
  • Dokuz, A., Uysal, İ., Dilek, Y., Karslı, O., Meisel, T., Kan- demir, R. 2015. Geochemisry, Re-Os isotopes and highly sideropile element abundances in the Eas- tern Pontides (NE Turkey): Multiple episodes of melt extraction-depletion, melt-rock interaction and fertilization of the Rheic Ocean mantle. Gond- wana Research 27, 2, 612-628.
  • Duru, M., Pehlivan, Ş., Okay, A.İ., Şentürk, Y., Kar, H. 2012. Biga Yarımadasının Tersiyer öncesi jeolojisi, Biga Yarımadasının genel ve ekonomik jeolojisi. Maden Tetkik ve Arama Genel Müdürlüğü özel yayın serisi, No: 28, 7-74 s.
  • Eroskay, O. 1965. Paşalar Boğazı-Gölpınar sahasının jeolo- jisi (Geology of Paşalar Boğazı-Gölpınar area). İstanbul Üniversitesi Fen Fakültesi Mecmuası B,135-170.
  • Genç, Ş.C., Yılmaz, Y. 1995. Evolution of the Triassic con- tinental margin, northwest Anatolia. Tectonophysics 243, 193-207.
  • Göncüoğlu, M.C., Erendil, M., Tekeli, O., Aksay, A., Kuş- cu, İ., Ürgün, B. 1987. Geology of the Armutlu Pe- ninsula. IGCP Project 5, Guide Book. Field Excursion Along W-Anatolia, 12-18.
  • Göncüoğlu, M.C., Turhan, N., Şentürk, K., Özcan, A., Uy- sal, Ş. 2000. A geotraverse across NW Turkey: tec- tonic units of the central Sakarya region and their tectonic evolution. Bozkurt, E., Winchester, J., Pi- per, J.A. (Ed). Tectonics and Magmatism in Tur- key and the Surrounding Area. Geological Society of London, Special Puplication. 173, 139-161.
  • Kanar, F., Pehlivan, Ş., Kandemir, Ö., Tok, T., Çakır, K. 2013. 1/100.000 Ölçekli Türkiye Jeoloji Haritaları Serisi, Maden Tetkik ve Arama Genel Müdürlüğü, Bursa-H22 Paftası, No:192.
  • Kaya, O., Mostler, H. 1992. A Middle Triassic age for low- grade greenschist facies metamorphic sequence in Bergama (İzmir), western Turkey: The first pele- ontological age assignment and structural-stratig- raphic implications. Newsletter for Stratigraphy 26, 1-17.
  • Keskin, İ., Korkmaz, S., Gedik, İ., Ateş, M., Gök, L. 1989. Bayburt dolayının jeolojisi. Maden Tetkik ve Arama Genel Müdürlüğü Rapor No: 8995, Ankara (unpublished).
  • Koçyiğit, A. 1987. Hasanoğlan (Ankara) yöresinin tektono- stratigrafisi: Karakaya orojenik kuşağının evrimi (Tectonostratigraphy of the Hasanoğlan (Ankara) region: evolution of the Karakaya orogenic belt). Yerbilimleri 14, 269-294.
  • Koçyiğit, A., Kaymakçı, N., Rojay, B., Özcan, E., Dirik, K., Özçelik, Y. 1991. İnegöl-Bilecik- Bozüyük arasında kalan alanın jeolojik etüdü. Orta Doğu Teknik Üniversitesi-Türkiye Petrolleri Anonim Ortaklığı proje rapor No: 90-03-09-01-05 (unpublished).
  • Kozur, H. 1999. Permian development in the western Tethys. Rathanasthian, B., Rieb, S.L. (Ed). Pocee- dins of the International Sympozium on Shallow Tethys 5, 101-103.
  • Kozur, H., Aydın, M., Demir, O., Yakar, H., Göncüoğlu, M.C., Kuru, F. 2000. New stratigrafic and palaeog- raphic result from the Paleozoic and early Mesozo- ic of the Middle Pontides (northern Turkey) in the Azdavay, Devrekani, Küre and İnebolu areas. Imp- lications for the Carboniferous-Early Cretaceous geodynamic evolution and some related remarks to the Karakaya oceanic rift basin. Geologica Croatia 53, 209-268.
  • Leven, E.J., Okay, A.İ. 1996. Foraminifera from the exotic Permo-Carboniferous limestone blocks in the Ka- rakaya Complex, northwest Turkey. Rivista Italia- na Paleontologiae Stratigrafia 102, 139-174.
  • Nzegge, O.M., Satır, M., Siebel, W., Taubald, H. 2006. Ge- ochemical and isotopic constrains on gnesis of the Late Paleozic Deliktaş and Sivrikaya granites from the Kastamonu granitoid belt (Central Pontides, Turkey). N. Jb. Miner Abh. 183, 27-40.
  • Okay, A.İ. 1984. The geology of the Ağvanis metamorphic rocks and neighbouring formations. Maden Tetkik ve Arama Dergisi 99/100, 16-36.
  • Okay, A.İ. 1996. Granulite facies gneisses from the Pulur region, Eastern Pontides. Turkish Journal of Earth Sciences 5, 55-61.
  • Okay, A.İ. 2000. Was the late Triassic orogeny in Turkey caused by the collision of an oceanic plateau. Boz- kurt, E., Winchester, J.A., Piper, J.A.D. (Ed). Tectonics and Magmatism in Turkey and Surrounding Area. Geological Society of London, Special Pup- lications 173, 25-41.
  • Okay, A. İ. 2004. Türkiye’nin Jeolojisinde Paleo-Neotetis Problemi. TMMOB Jeoloji mühendisleri Odası 57. Türkiye Jeoloji Kurultayı Bildiri Özleri Kitabı 8-9 s., Ankara.
  • Okay, A. 2011. Sakarya Zonu Jura Öncesi Temelinin Meta- morfik Evrimi. TMMOB Jeoloji mühendisleri Odası 64. Türkiye Jeoloji Kurultayı Bildiri Özleri 215-216 s., Ankara.
  • Okay, A.İ., Siyako. M., Bürkan, K.A. 1991. Geology and tectonic evolution of the Biga Peninsula, northwest Turkey. Bulletin of the Technical University of İstanbul 44, 191-256.
  • Okay, A.İ., Mostler, H. 1994. Carboniferious and Permian radiolarite blocks in the Karakaya Complex in northwest Turkey. Turkish Journal of Earth Scien- ces 3, 23-28.
  • Okay A.I., Satır, M., Maluski, H., Siyako, M., Monie., P., Mezger, R., Akyüz, S. 1996. Paleo-and Neo Teth- yan events in Northwest Turkey: geological geoc- hronological constraints. Yin, A., Harrison, M. (Ed). Tectonics of Asia, Cambridge University Press, pp. 420-441.
  • Okay, A.İ., Monie, P. 1997. Early Mesozoic subduction in the Eastern Mediterranean: evidence from Triassic eclogite in northwest Turkey. Geology 25, 595-598.
  • Okay, A.İ., Tüysüz, O. 1999. Tethyan stures of northern Turkey. Durand, B., Jolivet, L., Horvath, F., Seran- ne, M. (Ed). The Mediterranean Basins: Tertiary Extention Within the Alpine Orogen. Geological Society of London, Special Publications 156, 475- 515.
  • Okay, A. İ., Monod, O., Monie, P. 2002. Triassic bluesc- hists and eclogites from northwest Turkey: vesti- ges of the Paleo-Tethyan subduction. Lithos 64, 155-178.
  • Okay, A.İ., Göncüoğlu, M.C. 2004. The Karakaya Comp- lex: A review of Data and Concept. Turkish Jour- nal of Earth Sciences 13, 77-96.
  • Okay, A.İ., Noble, P.S.Ç., Tekin, U.K. 2011. Devonian ra- diolarian ribbon chert from the Karakaya Comp- lex, Northwest Turkey. Implications for the Paleo- Tetyhan evolution, Comptes Rendus Palevol 10, 1-10.
  • Okuyucu, C., Göncüoğlu, M.C. 2010. Middle-Late Aselian (Early Permian) fusulinid fauna from the post-Va- riscan cover in NW Anatolia (Turkey): Biostratig- raphy and geological implication. Geobios 43, 225-240.
  • Önder, F., Boztuğ, D., Yılmaz, O. 1987. New paleontological data (Conodont) from the Lower Mesozoic rocks of the Göynükdağı-Kastamonu region at the Western Pontides, Turkey. Melih Tokay Geology Semposium, Ankara, Abstracts, 127-128 p (in Turkish).
  • Özcan, A., Erkan, A., Keskin, E., Oral, A., Özer, S., Sü- mengen, M., Tekeli, O. 1980. Kuzey Anadolu Fa- yı-Kırşehir Masifi arasının temel jeolojisi. Maden Tetkik ve Arama Enstitüsü Rapor No: 6722, Ankara (unpublished).
  • Pickett, E.A., Robertson, A.H.F., Dixon, J.E. 1995. The Ka- rakaya Complex, NW Turkey: a Palaeotethyan ac- cretionary complex. Erler, A., Ercan, T., Bingöl, E., Örçen, S. (Ed). Geology of the Black Sea Regi- on. Proceedings of an international semposium on the Geology of the Black Sea region, September, 7-11, 1992, Ankara, Turkey. Mineral Research and Exploation and Chamber of Gological Engineers, Ankara, 11-18.
  • Pickett, E., Robertson, A.H.F. 1996. Formation of the Late Paleozoic-Early Mesozoic Karakaya Complex and related ophiolites in NW Turkey by Paleotethyan subduction-accretion. Journal of the Geological Society, London 153, 995-1009.
  • Rojay, B., Göncüoğlu, M.C. 1997. Tectonic setting of some pre-Liassic low grade metamorphics in northern Anatolia. Yerbilimleri 19, 109-118.
  • Saner, S. 1977. Geyve-Osmaneli Gölpazarı-Taraklı alanının jeolojisi: Eski çökelme ortamları çökelmenin evrimi. Yüksek lisans Tezi, İstanbul Üniversitesi, 312 s.
  • Sarıfakıoğlu, E., Sevin, M., Esirtgen, E., Duran, S., Parlak, O., Bilgiç, T., Dönmez, M., Dilek, Y. 2011. Çankırı-Çorum havzasını çevreleyen ofiyolitik kayaçların jeolojisi: Petrojenezi, tektoniği ve içerikleri. Maden Tetkik ve Arama Genel Müdürlüğü Rapor No: 11449, Ankara (unpublished).
  • Sarıfakıoğlu, E., Dilek, Y., Sevin, M. 2014. Jurassic- Paleogene intraoceanic magmatic evolution of the Ankara Melange, north-central Anatolia, Turkey. So- lid Earth 5, 1-32.
  • Stampfli, G.M., Borel, G.D. 2002. A plate tectonic model for the Paleozoic and Mesozoic constrained by dynamic plate baundaries and restored synthetic oceanic isochorones: Earth Planet. Sci. Lett., 169, 17-33.
  • Stocklin, J. 1977. Structural correlation of the Alpine ran- ges between Iran and Central Asia. Mem. Ser. Soc. Geol. France, 8, 333-353.
  • Şengör, A.M.C. 1979. Mid-Mesozoic closure of Permo-Tri- assic Tethys and its implications. Nature 279, 590- 593.
  • Şengör, A.M.C. 1984. The Cimmeride Orogenic System and the Tectonics of Eurasia. Geological Society of America, Special Paper 195, 82 p.
  • Şengör, A.M.C., Yılmaz, Y. 1981. Tethyan evolution of Turkey, a plate tectonic approach. Tectonophysics 75, 181-241.
  • Şengör, A.M.C., Yılmaz, Y., Sungurlu, O. 1984. Tectonics of the Mediterranean Cimmerides: nature and evaluation of the western termination of Paleo-Tethys.Dixon, J.E., Robertson, A.H.F. (Ed). The Geologi- cal Evolution of the Eastern Mediterranean. Geolo- gical Society of London, Special Publication 17, 77-112.
  • Şengün, M. 1990. Plate mozaic of Turkey during the Meso- zoic. International symposium on the geology of the Aegean Regions, Abstract, 192-194 p.
  • Tekeli, O. 1981. Subduction complex of pre-Jurassic age, northern Anatolia. Geology 9, 68-72.
  • Tekin, U.K., Göncüoğlu, M.C., Turhan, N. 2002. First evi- dence of Late Carnian radiolarian fauna from the İzmir-Ankara-Sture Complex, Central Sakarya, Turkey: Implication for the opening age of the İz- mir-Ankara branch of Neotethys. Geobios 35, 127-135.
  • TMMOB JMO. 2004. Jeolojik Zaman Çizelgesi. TMMOB Jeoloji Mühendisleri Odası, Ankara.
  • Topuz, G., Altherr, R., Kalt, A., Satır, M., Werner, O., Schwarz, W.H. 2004a. Aluminos granulites from the Pulur complex, NE Turkey: a case of partial melting, efficient melt extraction and crystallisati- on. Lithos 72, 183-207.
  • Topuz, G., Altherr, R., Satır, M., Schwartz, W.H. 2004b. Low-grade metamorhic rocks from the Pulur Complex NE Turkey: implications for the pre-Li- assic evolution of the eastern Pontides. Int. J. Earth Sci. 93,72-91.
  • Topuz, G., Altherr, R., Siebel, W., Schwartz, W.H., Zack, T., Hasözbek, A., Barth, B., Satır, M., Şen, C. 2010. Carboniferous high-potassium I-type grani- toid magmatism in the Eastern Pontides: The Gümüşhane pluton (NE Turkey). Lithos 116, 92-110.
  • Turhan, N., Okuyucu, C., Göncüoğlu, M.C. 2004. Autoch- thonous Upper permian (Midian) carbonates in the western Sakarya composite Terrane, Geyve Area, Turkey: Prelimenary Data. Turkish Journal of Earth Sciences 13, 215-229.
  • Tüysüz, O. 1996. Amasya ve çevresinin jeolojisi (Geology of the Amasya region). Türkiye 11. Petrol Kongre- si Bildiriler Kitabı, 32-48.
  • Ustaömer, P.A., Ustaömer T., Robertson A.H.F., 2012. Ion Probe U-Pb Dating of the Central Sakarya Base- ment: A Peri-Gondwana Terrane Intruded by Late Lower Carboniferous subduction/Collision related Granitic Rocks. Turkish Journal of Earth Sciences, 21, 905-932.
  • Uğuz, M.F., Turhan, N., Bilgin, A.Z., Umut, M., Şen, A.M., Acarlar, M. 1999. Kulu (Konya), Haymana (Ankara) ve Kırıkkale dolayının jeolojisi. Maden Tetkik ve Arama Genel Müdürlüğü Rapor No: 10399, An- kara (unpublished).
  • Yalınız, M.K., Göncüoğlu, M.C. 2002. Geochemistry and petrology of “Nilüfer type” metabasic rocks of eastern Kozak Massif, NW Turkey. 1st International Symposium Faculty of Mines (İTÜ) on Earth Sciences and Engineering 16-18 may 2002 İstanbul, Abstracts, 158.
  • Yılmaz, Y. 1981. Sakarya kıtası güney kenarının tektonik evrimi (Tectonic evolution of the southern margin of the Sakarya Continent). İstanbul Yerbilimleri 1, 33-52.
  • Yılmaz, Y., Tüysüz, O. 1984. Kastamonu-Boyabat-Vezir- köprü-Tosya arasındaki bölgenin jeolojisi. Maden Tetkik ve Arama Genel Müdürlüğü Rapor No: 7838, Ankara (unpublished).
  • Yılmaz, Y., Serdar, H.S., Genç, C., Yiğitbaş, E., Gürer, Ö.F., Elmas, A., Yıldırım, M., Bozcu, M., Gürpı- nar, O. 1997 . The geology and evalution of the Tokat Massif, south-central Pontides, Turkey. Inter- national Geology Rewiev 39, 365-382.
  • Yılmaz, A., Yılmaz, H. 2004. Geology and Structural Evo- lution of the Tokat Massif (Eastern Pontides, Tur- key). Turkish Journal of Earth Sciences 13, 232-247.