Biostratigraphy, microfacies and depositional environment of the Campanian-Lower Maastrichtian sequences in the Nasir Kandi area in southern part of the Moghan sedimentary basin, NW Iran

رخساره‌های رسوبی

Article 3, Volume 10, Issue 2, February 2018, Pages 213-234   

Document Type: مقالات پژوهشی

DOI: 10.22067/sed.facies.v10i2.56147

Authors

Mahboobeh Omidvar¹; Amrollah Safari^{* 1}; Hossein Vaziri-Moghaddam¹; Hormoz Ghalavand²

¹University of Isfahan

²Shahid Beheshti University

Abstract

Introduction
The Moghan area (N38º 30’ to 39º 42’ and E46º 39’ to 48º 10’), as a part of the Kura sedimentary-structural Basin, is located in the NW Iran. The geological and structural history of this area is related directly to its location in northern part of the Talysh-Lesser Caucasus folded and thrusted belt. It is positioned at the collisional zone between the Eurasia and Africa-Arabian continental plates. The convergence is active today, at an estimated rate of 20-30 mm per year.
The area is included in the world’s largest continental collision zone, the Alpine-Himalayan belt, and is marked by intense compression and faulting. The Moghan sedimentary Basin is part of the Para-Tethys Basin that formed in a back-arc and volcanic belt developed from southern France, in the Mediterranean to western China. Tectonic deformations during the Neogene favored the subdivision of Para-Tethys in three major subdomains namely the western, central and eastern Para-Tethys.
This study focuses on the Upper Cretaceous carbonate sequences of the Moghan area, considered as one of the most important intervals in view of their potential as reservoir rocks. Here, facies analysis and paleo-environmental reconstruction of these sequences are presented for the first time in eight surface sections across the study area.
Materials and Methods
This study is based on the stratigraphic and petrographic analysis of Upper Cretaceous sedimentary sequences in Nasir Kandi surface section in the Moghan area, NW Iran. A total of 498 meters of sedimentary thickness were studied and logged. Macroscopic field-features descriptions combined with the results of microscopic studies have been used for facies analysis, paleoenvironmental reconstruction and biozonation. In total, 161 hand specimens were collected for subsequent studies. Sampling intervals were generally between 1 to 3 meters.
Discussion
Upper Cretaceous paleogeographic maps from the eastern part of the Para-Tethys Basin indicate that the Moghan area was located at 30-35º paleolatitude in northern hemisphere. During this time, sea-level was at one of its higher levels in geological history and carbonate platforms developed on continental margins all around the Tethyan realm (Miller et al., 2004). Shallow- to deep marine carbonates were deposited in such platforms in a tectonically active back-arc basin simultaneously to volcanic activity and siliciclastic influx. Based on it paleolatitude location, a temperate to cool subtropical paleoclimatic condition could be considered for this area. This interpretation is also supported by our observations, especially regarding the grain association (skeletal and non-skeletal) of the studied sequences.
Faunal and floral association of this formation (including rudists, other bivalves, echinoderms, benthic and planktonic foraminifera, red algae and bryozoan) represents a foraminiferal-mollusk (foramol) or bryozoan-mollusk (bryomol) association (Coffey and Read, 2007; Einsele, 2013). These communities live in temperate and cold waters and also at deeper settings in comparison to the tropical chlorozoan association (Lees, 1975; Flügel, 2013).
In Nasir Kandi section in westernmost part of the Moghan area, deep-marine pelagic facies are the dominant. Therefore, it seems that the shallow inner parts of the Upper Cretaceous platform were located in the central parts of Moghan area. This shallow platform turns into deep marine settings with a steep slope and without any remarkable marginal barrier, to the southeast and southwest.  Accordingly, biostratigraphic analysis of these facies, based on planktonic foraminifera resulted in recognition of four biozones: Globotruncana ventricosa Zone (middle to late Campanian), Globotruncanella havanensis Zone (late Campanian), Globotruncana aegyptiaca Zone (latest Campanian) and Gansserina gansseri Zone (latest Campanian to early Maastrichtian).
Acknowledgment
We are grateful to the National Iranian Oil Company- Exploration Directorate for financial support and data preparation. The University of Isfahan and the Pars Petro Zagros (PPZ) Company are thanked for the provision of facilities for this research. Journal editor and anonymous reviewers are acknowledged for their kind helps.
Keywords: Campanian; Maastrichtian; planktonic foraminifera; microfacies; carbonate platform; Moghan basin.
References
Coffey, B.P., & Read, J.F., 2007. Subtropical to temperate facies from a transition zone, mixed carbonate-siliciclastic system, Palaeogene, North Carolina, USA. Sedimentology, 54: 339-365.
Einsele, G., 2013. Sedimentary Basins: Evolution, Facies, and Sediment Budget. Springer Science and Business Media, 628 p.
Flügel, E., 2013. Microfacies of Carbonate Rocks: analysis, interpretation and application. Springer, Berlin, 924 p.
Lees, A., 1975. Possible influence of salinity and temperature on modern shelf carbonates sedimentation. Marine Geology, 19 (3): 159-198.
Miller, K.G., Sugarman, P.J., & Browning, J.V., 2004. Upper Cretaceous sequences and sea-level history, New Jersey coastal plain. Geological Society of America Bulletin, 116: 368-393.

Keywords

Campanian; Planktonic Foraminifera; microfacies; carbonate platform; Moghan basin

References

صاحب نوری، ع.ا.، 1383. مطالعه میکروفسیل‌های سازند اجاق قشلاق در مقطع تولون (دشت مغان). ﭘایان نامه کارشناسی ارشد، دانشگاه تهران، 143 ص.

Abbasov, A.B., 1985. Analiz raspredeleniya radiolyariy v tanatotsenozakh pozdnemelovyikh basseynov Malogo Kavkaz. Izvestiya akademii Nauk Azerbaidzhanskoy SSR, Seriya nauk o zemle, 1: 49-52.

Adamia, S., Zakariadze, G., Chkhotua, T., Sadradze, N., Tserteli, N., Chabukiani, A., & Gventsadze, A., 2011.Geology of the Caucasus; A review. Turkish Journal of Earth Sciences, 20: 489-544.

Adams, A.E., Khalili, M., & Khosravy, A., 1967. Stratigraphic significate of some Oligosteginids Assemblage form Lurestan province, NW Iran. National Iranian Oil Ccompany, Report No. 1080.

Ali-Zade, A.A., 1972. Cretaceous Belemnites of Azerbaijan. Nedra, Moskva, 279 p. (in Russian).

Alsharhan, A.S., & Nairn, A.E.M., 1988. A review of the Cretaceous formations in the Arabian Peninsula and Gulf: PartII. Mid - Cretaceous (Wasia Group), stratigraphy and paleontology. Journal of Petroleum Geology, 11: 89-112.

Aqrawi, A.A.M., Thehni, G.A., Sherwani, G.H., & Kareem, B.M.A., 1998. Mid cretaceous rudist-bearing carbonates of the Mishrif Formation: an important reservoir sequence in the Mesopotamian Basin, Iraq. Journal of Petroleum Geology, 21: 57-82.

Azizbekova, A.R., & Abbasov, A.B., 1988. Populyatsii planktonnyikh mikroorganiznov na rubezhe alba i cenomana na yugo-vostochnom Kavkaze. Sovremennyie problemyi mikropaleontologii. Tez. Doki. 34 sessii VPO. Baku, 5-6.

Azizbekov, SH., (ed.), 1972. Geology of the USSR. Azerbaijanian SSR. Nedra, Moskva, XLVII: 1-520. (in Russian).

Bahramizadeh, H., 2012. Biostratigraphy and micropaleontological final report on the drilled wells and stratigraphic sections of the Moghan area. National Iranian Oil Ccompany, Report No. 2317: 1-50.

Bahramizadeh, H., 1979. Paleontological study of surface samples from Moghan area. National Iranian Oil Ccompany, Report No. 373: 1-55.

Bakhshi, A., 2003. Sedimentology studies on the drilled sequence of Aslandoz well # 1 and Ortadagh well#1 & 2 in Moghan area Northwest of Iran. National Iranian Oil Ccompany, Report No. 1312: 1-57.

Baranova, E.P., Kosminskay, I.P., & Pavlenkova, N.I., 1991. A reinterpretation of South Caspian Dss data. Geophysical Journal, 10: 666-677.

Blendinger, W., 1985. Radiolarian limestones interfingering with Loferites (Triassic, Dolomites, Italy). Neues Jahrbuch für Geologie und Paläontologie, 1985 (4): 193-202.

Blount, D.N., & Moore, C.H.Jr., 1969. Depositional and non-depositional carbonate breccias, Chiantla quadrangle, Guatemala. Geological Society of America Bulletin, 80: 429-442.

Caron, M., 1985. Cretaceous planktonic foraminifera. In: Bolli, H.M., Saunders, J.B., & Perch-Nielsen, K., (eds.), Plankton Stratigraphy. Cambridge University Press, 11-86.

Craig Shipp, R., Weimer, P., & Posamentier, H.W., 2011. Mass-Transport Deposits in Deep water Settings. SEPM special publication, 96: 1-32.

Demets, C., Gordon, R., Argus, D., & Stein, S., 1990. Current plate motions. Geophysical Journal International, 101: 425-478.

Embry, A., & Klovan, J., 1971. A Late Devonian reef tract on Northeastern Banks Island, NWT. Canadian Petroleum Geology Bulletin, 19: 730-781.

Flügel, E., 2010. Microfacies of carbonate rocks. Springer-Verlag. Berlin, 1006 p.

Harold, V.T., & Trujillo, A.P., 2004. Introductory Oceanography. Prentice Hall, 608 p.

Khain, V., 1975. Structure and main stages in the tectono-magmatic development of the Caucasus: an attempt at geodynamic interpretation. American Journal of Science, 275 (A): 131-156.

Kruglikova, S.B., 1988. Rasprostranenie radiolyarii v pliotsen-chetvertichnykh otlozheniyakh glubokovodnykh kotlovin Atlanticheskogo Okeana. In: Krasheninnikov, V.A., & Basov, I.A., (eds.), MorskayaStratigrafiya i Mikropaleontologiya. Nauka, Moscow, 160-167 p.

Lerche, I., Ali-Zade, A.K., Guliev, I., Bagirov, K., Nadirov, R., Tagiyev, M., & Feizullaev, A., 1997. South Caspian Basin: Stratigraphy, Geochemistry and Risk Analysis. Nafta-Press, Baku, 152 p.

Loeblich, A.R., & Tappan, H., 1988. Foraminiferal Genera and their Classification, 2. Van Nostrand Reinhold Company, New York. 1182 p.

Molina, J.M., Ruiz-Ortiz, P.A., & Vera, J.A., 1997. Calcareous tempestites in pelagic facies (Jurassic, Betic Cordillera, SouthernSpain). Sedimentary Geology, 109: 95-109.

Omidvar, M., Mehrabi, H., Sajjadi, F., Bahramizadeh-Sajjadi, H., Rahimpour-Bonab, H., & Ashrafzadeh, A., 2014. Revision of the foraminiferal biozonation scheme in Upper Cretaceous carbonates of the Dezful Embayment, Zagros, Iran: integrated palaeontological, sedimentological and geochemical investigation. Revue de Micropaleontologie, 57: 97-116.

Perez-Lopez, A., & Perez-Valera, F., 2012. Tempestite facies models for the epicontinental Triassic carbonates of the Betic Cordillera (S Spain). Sedimentology, 59: 646-678.

Pettijohn, F.J., Potter, P.E., & Siever, R., 1987. Sand and sandstone. 2nd edition. Springer, New York, 553 p.

Postoma, J., 1971. Manual of Planktonic Foraminifera. Elsevier Publishing Company, Amsterdam, 420 p.

Premoli Silva, I., & Verga, D., 2004. Practical Manual of Cretaceous Planktonic Foraminifera, Course 3. In: Verga, D., & Rettori, R., (eds.), International School on Planktonic Foraminifera. Universities of Perugia and Milano. Tipografi adi di Pontefelcino, 283 p.

Popovich, S., Fakoori, G.A., Medvedev, P., Hasangoodarzi, M., Odoleev, G., Sherkati, S., Smirnov, V., Fazeli, S., Belyaeva, N., Tavakoli-Shirazi, S., Golichenko, G., Nabet, M., Zhukova, E., Shokrzadeh-Domrigh, N., Kuklinsky, A., Farzaneh, F., Stepanov, A., & Tohidinia, A., 2007. Geological Model Creation, Delineation and Estimation of Prospects for Moghan Block (Iran). Joint study project, National Iranian Oil Ccompany, Exploration / LUKOIL Company, Final Report to Сontract No. IR 40-06-71-001-23/06: 1-658.

Racki, G., & Cordey, F., 2000. Radiolarian palaeoecology and radiolarites: is the present the key to the past. Earth Science Reviews, 52: 83-120.

Rahimpour-Bonab, H., Mehrabi, H., Enayati-Bidgoli, A.H., & Omidvar, M., 2012. Coupled imprints of tropical climate and recurringemersions on reservoir evolution of a mid-Cretaceous carbonate ramp, Zagros Basin, SW Iran. Cretaceous Research, 37: 15-34.

Robaszynski, F., & Caron, M., 1995. Foraminifères planctoniques du Cretace: commentaire de la zonation Europe-Mediterrane. Bulletin de la Societe Geologique de France, 166: 681-692.

Sari, B., 2006. Upper Cretaceous Planktonic Foraminiferal Biostratigraphy of the Bey Daglari Autochthon in the Korkuteli Area, Western Taurides, Turkey. Journal of Foraminiferal Research, 36: 241-261.

Sari, B., Kandemir, R., Ozer, S., Walaszczyk, I., Gormus, M., Demircan, H., & Yilmaz, C., 2014. Upper Campanian calciclastic turbidite sequences from the Hacımehmet area (eastern Pontides, NE Turkey): integrated biostratigraphy and microfacies analysis. Acta Geologica Polonica, 64: 393-418.

Scholle, P.A., Bebout, D.G., & Moore, C.H., (eds.), 1983. Carbonate depositional environments. American Association Petroleum Geologists Memoir, 33: 1-708.

Sharp, I., Gillespie, P., Morsalnezhad, D., Taberner, C., Karpuz, R., Verge, S.J., Horbury, A., Pickard, N., Garland, J., & Hunt, D., 2010. Stratigraphic Architecture and Fracture-Controlled Dolomitization of the Cretaceous Khami and Bangestan Groups: An Outcrop Case Study, Zagros Mountains, Iran. Geological Society, London, 329: 343-396.

Sliter, W.V., 1989. Biostratigraphic zonation for Cretaceous planktonic foraminifers examined in thin section. Journal of Foraminiferal Research, 19: 1-19.

Taraz, H., 1951. Geological report of NE Azerbaijan. National Iranian Oil Ccompany, Report No. 96: 1-24.

Tucker, M., & Wright, V.P., 1990. Carbonate sedimentology. Black well Scientific, Oxford, 482 p.

Vaziri-Moghaddam, H., 2002. Biostratigraphic study of the Ilam and Gurpi formations based on planktonic foraminifera in SE of Shiraz, Iran. Journal of Sciences, Islamic republic of Iran, 4: 339-356.

Wynn Jones, R., 2006. Applied Palaeontology. Cambridge University Press, 452 p.