Document Type : Original Paper
Authors
1 Young Researchers Club and elites, Mashhad Branch, Islamic Azad University, Mashhad, Iran
2 Department of Geology, North-Tehran Branch, Islamic Azad University, Tehran, Iran
3 Departement of Geology, Birjand University, Birjand, Iran
Abstract
During the recent field research on the Tirgan Formation in the west of Kopet-Dagh sedimentary basin, ammonite assemblages were obtained from the carbonate strata of this formation. This new finding is important for stratigraphical purpose. In this research, 3 genera belong to Heteroceras, Deshayesites and Cheloniceras? as well as one uncertain genus belongs to Turkmeniceras are determined. The ammonite fauna dates the Tirgan Formation from the late Barremian to early Aptian in the studied stratigraphic section.
Keywords
Main Subjects
1. Bogdanova T.N., and Prozorovsky V. Substantiation of the Barremian/ Aptian boundary. Scripta geologica, 3: 45-81 (1999).
2. Afshar-Harb A. Geology of Kopet-Dagh. Treatise on the Geology of Iran, Geological Survey of Iran Publication, 11: 1-275 (1969).
3. Golonka J. Late Triassic and Early Jurassic palaeogeography of the world. Palaeogeography, Palaeoclimatology, Palaeoecology, 244(1): 297-307 (2007).
4. Niebuhr B., Taherpour Khalil Abad M., Wilmsen M., Razmi J.N., Aryaei A.A., and Ashouri A. First record of late Campanian ammonites from the Abderaz Formation of the Koppeh Dagh, northeastern Iran. Cretaceous Research, 58: 202-222 (2016).
5. Robert M.M., Letouzey J., Kavoosi M.A., Sherkati Sh., Müller C., Vergés J. and Aghababaei A. Structural evolution of the Kopeh Dagh fold-and-thrust belt (NE Iran) and interactions with the South Caspian Sea Basin and Amu Darya Basin. Marine and Petroleum Geology, 57: 68-87 (2014).
6. Seyed-Emami K. and Alavi-Naini M. Bajocian stage in Iran. Memorie del Descrizione della Carta Geologica d'ltalia, 40: 215-222 (1990).
7. Stocklin J. and Setudehnia A. Stratigraphic Lexicon of Iran. Geological Survey Iran, Tehran, Iran, Report No. 18 (1991).
8. Ghaemi F. Amend Geological Sheet (Scale of 1:100000), Under publication, Geological Survey of Iran (2017).
9. Immel H., Seyed-Emami K. and Afshar-Harb A. Kreide-Ammoniten aus dem iranischen teil des Koppeh-Dagh (NE-Iran). Zitteliana, 21: 159-190 (1997).
10. Coquand H. Sur la convenance d’établir dans le groupe inférieur de la formation crétacée un nouvel étage entre le Néocomien proprement dit (couches à Toxaster complanatus et à Ostrea couloni) et le Néocomien Supérieur (étage Urgonien d’Orbigny). Mémoires de la Societé d’Emulation Provence, 2: 1-127 (1862).
11. Busnardo R. Le stratotype du Barrémien, Lithologie et macrofaune in Colloque sur le Crétacé inférieur (Lyon, September 1963). Mémoires Bureau de Recherches Géologiques et Minières, 34: 101-116 (1965).
12. Delanoy G. Biostratigraphie des faunes d’Ammonites à la limite Barrémien-Aptien dans la region d’Angles- Barrême-Castellane. Annales du Muséum d’Histoire Naturelle de Nice, 12: 1-270 (1997).
13. Lukeneder A. New biostratigraphic data on an Upper HauterivianeUpper Barremian ammonite assemblage from the Dolomites (Southern Alps, Italy). Cretaceous Research, 35: 1-21 (2012).
14. Kotetishvili E., Kakabadze M. and Kakabadze I. Steps in Evolution of the Early Cretaceous ammonites of Georgia. Trudy Akademya Nauk Gruzinskoi SSR, A. Djanelidze Geologiskii Institut, Novya Serie, 115: 76-85 (2000).
15. Vasicek Z. Michalik J. and Borza K. To the "Neocomian" biostratigraphy in the Krizna-Nappe of the Strazovske Vrchy Mountains (northwestern Central Carpathians). Zitteliana, 10: 467-483 (1983).
16. Ivanov M. and Idakieva V. Upper Barremian ammonite biostratigraphy in Central-North and Northeastern Bulgaria. Proceedings of National Conference Geosciences 2009, Bulgarian Geological Society, 55-56 (in Bulgarian) (2009).
17. Company M., Sandoval, J., Tavera J.M. Aoutem M. and Ettachfini M. Barremian ammonite faunas from the western High Atlas, Morocco-biostratigraphy and palaeobiogeography. Cretaceous Research, 29: 9-26 (2008).
18. Matsukawa M., Obata I. and Sato K. Barremian ammonite fauna of the lower Ishido Formation, eastern part of the Sanchu Cretaceous, Japan. Bulletin of Tokyo Gakugei University, Natural Sciences, 59: 77-87 (2007).
19. Casey R. The stratigraphical palaeontology of the Lower Greensand. Palaeontology, 3: 487-621 (1961).
20. Ropolo P., Moullade M., Gonnet R., Conte G. and Tronchetti G. The Deshayesitidae Stoyanov, 1949 (Ammonoidea) of the Aptian historical stratotype region at Cassis-La Bédoule (SE France). Carnets de Géologie/Notebooks on Geology, CG2006 (M01): 1-46 (2006).
21. Tovbina S.Z. On the Zone Acanthohoplites prodromus of the Upper Aptian of Turkmenia. Izvestiya Akademya Nauk SSSR, Seriya Geologiskaya, 7, 142-144. (1980).
22. Seyed-Emami K., Brants A. and Bozorgnia F. Stratigraphy of the Cretaceous rocks southeast of Esfahan. Geological Survey of Iran, 20: 5-40 (1971).
23. Raisossadat S.N. The Early Aptian (Early Cretaceous) ammonites from the Aralar Mountains, Basque-Cantabrian Basin, Northern Spain. Carnets de Géologie/Notebooks on Geology, CG2011(M02) (2011).
24. Moreno-Bedmar J.A., Company M., Bover-Arnal T., Salas R., Delanoy G., Maurrasse F.J.M.R., Grauges A. and Martínez R. Lower Aptian ammonite biostratigraphy in the Maestrat Basin (Eastern Iberian Chain, Eastern Spain). A Tethyan transgressive record enhanced by synrift subsidence. Geologica Acta, 8(3): 281-299 (2010).
25. Hoedemaeker Ph.J. and Bulot L. Preliminary ammonite zonation for the Lower Cretaceous of the Mediterranean region. Géologie Alpine, 66: 123-127 (1990).
26. Hoedemaeker Ph.J. and Rawson P. Report on the 5th International Workshop of the Lower Cretaceous Cephalopod Team (Vienna, 5 September 2000). Cretaceous Research, 21: 857-860 (2000).
27. Reboulet S., and Szives O., Aguirre-Urreta M.B., Barragán, R. Company M., Idakieva V., Ivanov M., Kakabadze M.V., Çaglar M.K., González-Arreola C., Fozy, I., Baraboshkin, E.Y., Kenjo S., Lukeneder, A., Raisossadat, N., Rawson P.F. and Tavera, J.M. Report on the 5th International Meeting of the IUGS Lower Cretaceous Ammonite Working Group, the Kilian Group (Ankara, Turkey, 31st August 2013). Cretaceous Research, 50: 126-37 (2014).
28. Reboulet S., Rawson P.F., Moreno-Bedmar J.A., Aguirre-Urreta M.B., Barragán R., Bogomolov Y., Company M., González-Arreola C., Idakieva K. Report on the 4th international meeting of the IUGS Lower Cretaceous ammonite working group, the “Kilian Group”(Dijon, France, 30th August 2010). Cretaceous Research, 32(6): 786-793 (2011).
29. Kakabadze M.V. The Barremian biostratigraphical subdivisions of Georgia (USSR) and comparison with some Western Mediterranean regions. In Cretaceous of the Western Tethys (ed. Wiedmann, J.). Proceedings 3rd International Cretaceous Symposium Tubingen, 551-560 (1989).
30. Kakabadze M.V. Lower Cretaceous heteoceratides of Georgia and adjacent regions. Issues of Palaeontology and Stratigraphy of Mesozoic of Georgia. Trudy Geologichskago Akademya Nauk Gruzinskoi SSR, 47: 63-131. (1975).
31. Hoedemaeker P.J., Reboulet S., Aguirre-Urreta M.B., Alsen P., Aoutem M., Atrops F., Barragan R., Company M., Gonzalez Arreola, C., Klein J., Lukeneder A., Ploch I., Raisossadat N., Rawson P.F., Ropolo P., Vasicek Z., Vermeulen J. and Wippich M., Report on the 1st International Workshop of the IUGS Lower Cretaceous Ammonite Working Group, the ‘‘Kilian Group’’ (Lyon, 11 July 2002). Cretaceous Research, 24: 89-94 (2003).
32. Bogdanova T.N. Deshayesites tuarkyricus Zone; the lowermost zone of the Aptian in Turkmenistan. Ezhegodnik Vsesoyuznogo Paleontologicheskogo Obshchestva, 26: 128-147 (1983).
33. Poursoltani M.R. and Pe-Piper G. Source and diagenesis of Middle Jurassic marine mudstones, Kopet-Dagh Basin, NE Iran. Geopersia, 5(2): 93-109 (2015).
34. Molaei M., Vaziri S.H., Taherpour-Khalil-Abad M. and Taheri J. Early Cretaceous Neotrocholina Reichel, 1956 from the Tirgan Formation, Kopet-Dagh sedimentary basin, NE Iran: systematic and biometric interpretation. Arabian Journal of Geosciences, 10(14): 1-15 (2017).
)