Document Type : Final File

Authors

1 Department of Geology, Faculty of Science, University of Isfahan, 81746, Isfahan, Islamic Republic of Iran

2 Third Central Building, National Iranian Oil Company, Tehran, Islamic Republic of Iran

3 Department of Geology, Faculty of Earth Sciences, Shahid Beheshti University, Tehran. Islamic Republic of Iran

Abstract

The Lower Cretaceous Carbonate deposits of the Dariyan Formation of the High
Zagros Belt are mainly composed of thick to medium bedded limestone. These deposits
contain abundant and diversified benthic foraminifera which have been recovered from
carbonate rocks. A rich assemblage of microfossils with characteristic: Palorbitolina
lenticularis (Blumenbach), Mesorbitolina subconcava (Leymerie), Mesorbitolina texana
(Roemer), Mesorbitolina parva (Douglass) Pseudocyclammina hedbergi (Maync),
Archalveolina reicheli (de Castro), Praechrysalidina infracretacea Luperto Sinni,
Chofatella decipiens (Schlumberger), Debarina hahonerensis (Fourcade, Raoul et Vila),
Rumanoculina ponticuli (Neagu), Rumanoloculina pseudominima (Bartenstein et
Kovatcheva), Istriloculina cf. elliptica (Iovcheva) indicate paleoenviromental conditions
of shallow water carbonate sedimentation and Urgonian type facies. Based on
microfossils distribution and biozones identification in study sections, the age of the
Dariyan Formation is assigned late Barremian-early Albian. The microfossils
assemblages are regarded to be comparable with the Urgonian-type fauna known from
the peri-Mediterranean Tethys in the Barremian-Albian time interval.

Keywords

Main Subjects

1. Alavi M. Structures of the Zagros fold-thrust belt in Iran. Am. J. Sci. 307: 1064-1095 (2007).

2. Berberian M. and King G.C.P. Towards the paleogeography and tectonic evolution of Iran. Can. J. Earth Sci. 18: 210-265 (1981).

3. Carevic I., ljubovic-obradovic D., božinovic M. and Jovanovic M. Upper Barremian-lower Aptian Urgonian

limestones in the Rakova Bara section (Carpatho- Balkanides, ne serbia): Analysis and comparison with

adjacent areas. UDC 911.2:552.32(497.11), DOI:10.2298/gsgd1001001c, (2010).

4. Hossseini S. Holostratigraphy of the Berriasian- Aptian carbonate platform deposits from the Zagros fold-thrust belt, SW Iran: Ph.D Thesis, Switzerland, University of Geneva, 273p, (2014).

5. Hussinec A. Palorbitolina lenticularis from the northern Adriatic region: paleogeographical and evolutionary implications. J. Foramin. Res. 31: 287–293 (2001).

6. Jamalian M. and Adabi M.H. Geochemistry, microfacies and diagenetic evidences for original aragonite mineralogy and open diagenetic system of lower Cretaceous carbonates Fahliyan Formation (Kuh-e Siah area, Zagros Basin, South Iran). Carbon. Evapor. 30, 77-98 (2014).

7. James G.A. and Wynd J.G. Stratigraphy nomenclature of Iranian oil consortium agreement area. AAPG Bull. 49: 2182-2285 (1965).

8. Khatibi M. and Adabi M.H. Microfacies and geochemical evidence for original aragonite mineralogy of a foraminifera dominated carbonate ramp system in the late Paleocene, Alborz basin, Iran. Carbon. Evapor. 29: 155- 175 (2013).

9. Krobicki M. and Olszewskal B. Urgonian-type microfossils in exotic pebbles of the Late Cretaceous and Palaeogene gravelstones from the Sromowce and Jarmuta formations (Pieniny Klippen Belt, Polish Carpathians). Studia Geol. Polon. 124: 215-235 (2005).

10.Moosavizadeh M. A., Mahboobi A., Mousavi-Harami R. and Kavoosi M.A. Early Aptian anoxic event (OAE) 1a in northeastern Arabian plate setting, an example from Dariyan Formation in Zagros fold-thrust belt, SE Iran. Arab. Jour. Geosci., 7, 4745-4756 (2014).

11.Navabpour P., Angelier J. and Barrier E. Mesozoic extensional brittle tectonics of the Arabian passive margin, inverted in the Zagros collision (Iran, interior Fars), In P. Leturmy and C. Robin, (Eds). Tectonic and Stratigraphic Evolution of Zagros and Makran during the Mesozoic– Cenozoic. Geol. Soc., Lon., 330: 65-96 (2010).

12. Parvaneh Nejad Shirazi M. and Abedi F. Lower Cretaceous Orbitolinid (Foraminiferida) Record from the Southwest of Iran (Zagros, Shiraz). OJG. 3: 1-6 (2013).

13. Schroeder R., Van Buchem F. S. P., Cherchi A., Baghbani D., Vincent B., Immenhauser A. and Granier B. Revised orbitolinid biostratigraphic zonation for the Barremian- Aptian of the eastern Arabian Plate and implications for regional stratigraphic correlations, GeoArabia, 4: 49-96 (2010).

14. Sepehr M. and Cosgrove J.W. Structural framework of the Zagros Fold- Thrust Belt, Iran. Mar. Petrol. Geol. 21: 829-843 (2004).

15. Stöcklin J. Structural history and tectonics of Iran. Am. Associ. Petrol. Geol. Bull. 52: 1229-1258 (1968).

16. van Buchem F.S.P., Baghbani D., Blout LG., Caron M., Gaumet F., Hosseini A., Keyvani F., Schroder R., Swennen R. and Vedrenne V. Barremian-Lower Albian sequence stratigraphy of southwest Iran (Gadvan, Dariyan and Kazhdumi Formation) and its comparison with Oman, Qatar and the United Arab Emirates. GeoArabia. 4: 503- 548 (2010).

17.Velic I. Stratigraphy and palaeobiogeography of Mesozoic benthic foraminifera of the Karst Dinarides (SE Europe). Geol. Croatica. 60(1): 1–113 (2007).

18.Vilas L., Masse J. P. and Arias C. Orbitolina episodes in carbonate platform evolution: the early Aptian model from SE Spain. Palaeogeogr. Palaeoclimatol. Palaeoecol. 119: 33–45 (1995).

19.Yavari M., Yazdi M., Gahalavand H. and Adabi M.H. Planktonic Foraminifera of the Dariyan formation and implications of Oceanic Anoxic Event 1a. Geopersia. 5: 125-137 (2015).