Calcareous nannofossil biostratigraphy in the Gurpi Formation Aghar anticline section located in SW Shiraz

رخساره‌های رسوبی

Article 2, Volume 13, Issue 1 - Serial Number 24, June 2020, Pages 22-36   

Document Type: مقالات پژوهشی

DOI: 10.22067/sed.facies.v13i1.58606

Author

Saeedeh Senemari^*

Associate Professor, Department of Mining Engineering, Faculty of Technical & Engineering, Imam Khomeini International University, Qazvin, Iran

Abstract

Introduction
One of the most extensive Cretaceous strata is the marine strata of the Gurpi Formation in Zagros, which was studied based on paleontology studies. The Gurpi Formation type section is located in Tang-e Pabdeh, North of Masjed Soleyman city (James & Wynd, 1965). One of the most important achievements obtained from the Gurpi Formation is the evaluation of stage boundary and biostratigraphy of it. In this section, the Gurpi Formation consists of 143 m thick which mainly consists of marl and marly limestone.
 
Materials and Methods
In this study, 73 samples from the Gurpi Formation interval have been studied. Samples were prepared following the standard smear slide method (Bown & Young 1998). All the slides were examined under the polarized light microscope at ×1000 magnification. The nomenclature of calcareous nannofossil follows the taxonomic schemes of Perch-Nielsen (1985) and Burnett (1998).
 
Discussion and Results
To study biostratigraphy based on calcareous nannofossils, the Gurpi Formation succession in the southwest of the Aghar anticline, SW Shiraz, was selected. In this section, the Gurpi Formation with 143 m thickness mainly consists of marly limestones and marl. For introducing index species, calcareous nannofossil assemblages, and bio-zones, slides have been studied at the Gurpi Formation, which led to the determination of 40 species and 21 genera of calcareous nannofossils. In this study, ten biozones were recognized in the Gurpi Formation. Bio-zones including Lucianorhabdus cayeuxii Zone (CC16), Calculites obscurus Zone (CC17), Aspidolithus parcus Zone (CC18), Calculites ovalis Zone (CC19), Ceratolithoides aculeus Zone (CC20), Quadrum sissinghii Zone (CC21), Quadrum trifidum Zone (CC22), Tranolithus phacelosus Zone (CC23), Reinhardtites levis Zone (CC24) and Arkhangelsiella cymbiformis Zone (CC25) with Late Santonian - middle Maastrichtian in age. According to the first and last occurrence of index species the following bio-zones are identified:
1- Lucianorhabdus cayeuxii Zone
This bio-zone is recorded from the FO Lucianorhabdus cayeuxii to the FO of Calculites obscurus. The age of this zone is Late Santonian. The thickness of this zone has been measured approximately 4 m.
2- Calculites obscurus Zone
The second zone is recorded from the FO of Calculites obscurus to the FO of Aspidolithus parcus. The age of this zone is Late Santonian - Early Campanian. The thickness of this zone is 4 m.
3- Aspidolithus parcus Zone
This zone spans the interval from the FO of Aspidolithus parcus to the last occurrence of Marthasterites furcatus. The age of this zone is Early Campanian.
4- Calculites ovalis Zone
The next nannofossil unit recorded in this study is the CC19. This zone spans the interval from the LO of Marthasterites furcatus to the FO of Ceratolithoides aculeus. The age of this zone is late Early Campanian.
5- Ceratolithoides aculeus Zone
The next bio-zone recorded is CC20. This zone spans the interval from the FO of Ceratolithoides aculeus to the FO of Quadrum  sissinghii. The age of this zone is late Early Campanian. The thickness of this zone was measured at about 15/6 m.
6- Quadrum sissinghii Zone
This zone spans the interval from the FO of Quadrum sissinghii to the FO of Quadrum trifidum. The age of this zone is early Late Campanian. The thickness of this zone was measured at about 4/4 m.
7- Quadrum trifidum Zone
This zone spans the interval from the FO of Quadrum trifidum to the LO of Reinhardtites anthophorus. The age of this zone is late Late Campanian. The thickness of this zone was measured at about 57 m.
8- Tranolithus phacelosus Zone
This zone spans the interval from the LO of Reinhardtites anthophorus to the LO of Tranolithus phacelosus. The age of this zone is late Late Campanian- Early Maastrichtian. The thickness of this zone was measured at about 38 m.
9- Reinhardtites levis Zone            
This zone spans the interval from the LO of Tranolithus phacelosus to the LO of Reinhardtites levis. The age of this zone is Early Maastrichtian. The thickness of this zone was measured at about 4 m.
10- Arkhangelsiella cymbiformis Zone
The last nannofossil unit recorded in this study is the CC25. This zone spans the interval from the LO of Reinhardtites levis to the FO of Nephrolithus frequens. The age of this zone is middle Maastrichtian.
So, as a result of this study and according to the identified bio-zones, the age of the Gurpi Formation is Late Santonian - middle Maastrichtian.
 
References
Bown, P.R., & Young, J.R., 1998. Techniques. In: Bown, P.R., (ed.), Calcareous Nannofossil Biostratigraphy. Chapman and Hall, London, 16-28.
Burnett, J.A., 1998. Upper Cretaceous. In: Bown, P.R. (ed.), Calcareous Nannofossil Biostratigraphy, British Micropalaeontological Society Publication Series. Chapman and Hall Ltd. Kluwer Academic Publisher, London, 132-165.
James, G.A., & Wynd, J.G., 1965. Stratigraphic Nomenclature of Iranian Oil Consortium Agreement Area. American Association of Petroleum Geologists Bulletin (AAPG), 49: 2182–2245.        
Perch-Nielsen, K., 1985. Cenozoic Calcareous Nannofossils. In: Bolli, H.M., Saunders, JB., & Perch-Nielsen, K., (eds.), Plankton Stratigraphy. Cambridge University Press, 427-554.

Keywords

Calcareous Nannofossils; Bio zones; Zagros; Cretaceous

References

آقانباتی،ع.، 1385. زمین شناسی ایران. سازمان زمین شناسی واکتشافات معدنی کشور، 586ص.

پرندآور، م.، ماهانی‌پور، ا.، آقانباتی، ع.، حسینی، س.، 1391. بررسی مرز کرتاسه ـ پالئوژن بر اساس شواهد مربوط به نانوفسیل‌های آهکی در یال شمال شرقی تاقدیس کوه گورپی. شانزدهمین همایش انجمن زمین شناسی ایران.

فریدونپور، م.، وزیری مقدم، ح.، غبیشاوی، ع.، طاهری، ع.، 1393. چینه نگاری سازندگورپی در برش تاقدیس کوه سیاه و مقایسه آن با برش‌های تنگ بوالفارس و تاقدیس آغار. رخساره‌های رسوبی، 7 (1): 83-106.

مطیعی، ه.، 1372. زمین شناسی ایران: چینه شناسی زاگرس. سازمان زمین شناسی و اکتشافات معدنی کشور، 536 ص.

همتی نسب، م.، قاسمی نژاد، ا.، درویش زاده، ب.، 1387. تعیین عمق دیرینه سازند گورپی بر مبنای فرامینیفرهای پلانکتونیک و بنتیک. مجله علوم دانشگاه تهران، 34( 1): 157-173

هادوی، ف.، ثبوت، م.، 1391. نانواستراتیگرافی مرز سازندهای گورپی پابده در برش تنگ دوراهک (جنوب تاقدیس کنگان). شانزدهمین همایش انجمن زمین شناسی ایران، صص 8-1.

Alavi, M., 2004. Regional stratigraphy of the Zagros fold-thrust belt of Iran and its proforeland evolution. American journal of Science, 304: 1-20.

Bahrami, M., & Parvanehnezhad Shirazi, M., 2010. Microfacies and sedimentary environments of Gurpi and Pabdeh Formations and the type of Mesozoic– Cenozoic boundary in Fars province, Iran. Journal of Applied Geology, 5 (4): 330-335.

Beiranvand, B., Ghasemi-Nejad, E., & Kamali, M.R., 2013. Palynomorphs response to sea-level fluctuations: a case study from Late Cretaceous-Paleocene, Gurpi Formation, SW Iran. Journal of Geopersia, 3 (1): 11-24.

Beiranvand, B., & Ghasemi-Nejad, E., 2013. High resolution planktonic foraminiferal biostratigraphy of the Gurpi Formation, K/Pg boundary of the Izeh Zone, SW Iran. Revista Brasileira de Paleontologia, 16 (1): 5-26.

Bornemann, A., Aschwer, U. & Mutterlose, J., 2003. The impact of calcareous nannofossils on the pelagic carbonate accumulation across the Jurassic-Cretaceous boundary. Palaeogeography, Palaeoclimatology, Palaeoecology, 199: 187-228.

Bornemann, A., Pross, J., Reichelt, K., Herrle, J. O., Hemleben, Ch. & Mutterlose, J., 2005. Reconstruction of short-term palaeoceanographic changes during the formation of the Late Albian Niveau Breistroffer black shales (Oceanic Anoxic Event 1d, SE France). Journal of the Geological Society, London, 162: 623-639.

Bown, P.R., & Young, J.R., 1998. Techniques. In: Bown, P.R., (ed.), Calcareous Nannofossil Biostratigraphy. Chapman and Hall, London, 16-28.

Bukry, D., 1973. Coccolith stratigraphy, eastern equatorial Pacific, Leg 16, Deep Sea Drilling Project. Initial Reports of the Deep Sea Drilling Project, 16: 653-711.

Burnett, J.A., 1998. Upper Cretaceous. In: Bown, P.R. (ed.), Calcareous Nannofossil Biostratigraphy, British Micropalaeontological Society Publication Series. Chapman and Hall Ltd. Kluwer Academic Publisher, London, 132-165.

Bralower, T.J., Leckie, R.M., Sliter, W.V., & Thierstein, H.R., 1995. An integrated Cretaceous microfossil biostratigraphy. In: Berggren, W.A., Kent, D.V., Aubry, M.P., & Hardenbol, J., (eds.), Geochronology, time scales and global stratigraphic correlation. SEPM special publication, 54: 65-79.

Bralower, T.J., 2002. Evidence of surface water oligotrophy during the Paleocene-Eocene thermal maximum: Nannofossil assemblage data from Ocean Drilling Program Site 690, Maud Rise, Weddell Sea. Paleoceanography, 17 (2): 1-13.

Bralower, T.J., 2005. Data report: Paleocene-Early Oligocene calcareous nannofossil biostratigraphy, ODP Leg 198 Sites 1209, 1210, and 1211 (Shatsky Rise, Pasific Ocean). In: Bralower, T.J., Premoli Silva I., & Malone, M.J., (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, 198: 1–15.

Campbell, R.J., Howe, R.W., & Rexilius, J.P., 2004. Middle Campanian–lowermost Maastrichtian nannofossil and foraminiferal biostratigraphy of the northwestern Australian margin. Cretaceous Research, 25: 827-864.

Erba, E., 2004, Calcareous nannofossils and Mesozoic oceanic anoxic events: Marine Micropaleontology, 52: 85-106.

Friedrich, O., & Meier, S., 2006. Suitability of stable oxygen and carbon isotopes of calcareous dinoflagellate cysts for paleoclimatic studies: Evidence from the Campanian- Maastrichtian cooling phase. Palaeogeography, Palaeoclimatology, Palaeoecology, 239: 456-469.

Hadavi, F., Khosrowtehrani, K., & Senemari, S., 2007. Biostratigraphy of Calcareous Nannofossils of Gurpi Formation in North Gachsaran. Journal of Geosciences, 64: 14-23.

Hadavi, F.M. & Ezadi, 2007. Biostratigraphy of the Gurpi Formation in Dare-Shahr section (Zagros basin). The First MAPG International Convention Conference and Exhibition, 28-31.

Herrle, J.O., 2003. Reconstructing nutricline dynamics of mid-Cretaceous oceans evidence from calcareous nannofossils from the Niveau Paquier black shale (SE France): Marine Micropaleontology, 47: 307-321.

Huber, B.T., & Watkins, D.K., 1992. Biogeography of Campanian- Maastrichtian calcareous plankton in the region of the Southern Ocean: Paleogeographic and Paleoclimatic implications. In: Kennett, J.P., & Warnke, D.A. (eds.), The Antarctic Paleoenvironment: A Perspective on Global Change. American Geophysical Union, Antarctic Research Series 56, Washington, 31-60.

Huber, B.T., Norris, R.D., & MacLeod, K.G., 2002. Deep-sea paleotemperature record of extreme warmth during the Cretaceous. Geology, 30: 123-126.

James, G.A., & Wynd, J.G., 1965. Stratigraphic Nomenclature of Iranian Oil Consortium Agreement Area. American Association of Petroleum Geologists Bulletin (AAPG), 49: 2182–2245.        

Linnert, C., & Mutterlose, J., 2009. Evidence of increasing surface water oligotrophy during the Campanian- Maastrichtianboundary interval: Calcareous nannofossils from DSDP Hole 390A (Black Nose). Marine Micropaleontology, 73: 26-36.

Linnert, C., Mutterlose, J., & Herrle, J.O., 2011. Late Cretaceous (Cenomanian–Maastrichtian) calcareous nannofossils from Goban Spur (DSDP Sites 549, 551): Implications for the palaeoceanography of the proto North Atlantic. Palaeogeography, Palaeoclimatology, Palaeoecology, 299: 507-528.

Lees, J.A., 2002. Calcareous nannofossil biogeography illustrates palaeoclimate change in the Late Cretaceous Indian Ocean. Cretaceous Research, 23: 537-634.

Mahanipour, A., & Najafpour, A., 2016. Calcareous nannofossil assemblages of the Late Campanian-Early Maastrichtian form Gurpi Formation (Dezful embayment, SW Iran): Evidence of a climate cooling event. Geopersia, 6 (1): 129-148.

Manivit, H., 1971. Les nannofossiles calcaires du Crétacé français (Aptien-Maestrichtien): essai de biozonation appuyée sur les stratotypes. Ph.D thesis, Université de Paris, 187 p.

Perch-Nielsen, K., 1985. Cenozoic Calcareous Nannofossils. In: Bolli, H.M., Saunders, JB., & Perch-Nielsen, K., (eds.), Plankton Stratigraphy. Cambridge University Press, 427-554.

Roth, P.H., 1978. Cretaceous nannoplankton biostratigraphy and oceanography of the northwestern Atlantic Ocean. Initial Reports of the Deep Sea Drilling Project, 44: 731-760.

Senemari, S., & Sohrabi Molla Usefi, M., 2012. Evaluation of Cretaceous-Paleogene boundary based on calcareous nannofossils in section of Pol Dokhtar, Lorestan, southwestern Iran. Arabian Journal of Geosciences, 6: 3615-3621.

Sissingh, W., 1977. Biostratigraphy of cretaceous calcareous nannoplankton: Geologie En Minjbouw, 56:  37-65.

Shamrock, J.L., & Watkins, D.K., 2009. Evolution of the Cretaceous calcareous nannofossil genus Eiffellithus and its biostratigraphic significance: Cretaceous Research Journal, 30: 1083–1102.

Tantawy, A.A.A.M., 2002. Calcareous nannofossil biostratigraphy and palaeoecology of the Cretaceous- Tertiary transition in the central eastern desert of Egypt. Marine Micropaleontology, 47: 323-356.

Thibault, N., & Gardin, S., 2007. The late Maastrichtian nannofossil record of climate change in the South Atlantic DSDP Hole 525A. Marine Micropaleontology, 65: 163-184.

Thibault, N., & Gardin, S., 2010. The calcareous nannofossil response to the end-Cretaceous warm event in the Tropical Pacific. Palaeogeography, Palaeoclimatology, Palaeoecology, 291: 239-252.

Thierstein, H.R., 1976. Mesozoic calcareous nannoplankton Biostratigraphy of Marine Sediments. Marine Micropaleontology, 1: 325-362.

Thierstein, H.R., 1981. Late Cretaceous nannoplankton and the change at the Cretaceous–Tertiary boundary. In: Warme, J.E., Douglas, R.G., & Winterer, E.L., (eds.), The Deep Sea Drilling Project: a decade of progress. SEPM Special Publication, 32: 355-394.

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, 13 (4): 339-356.

Villa, G., Fioroni, C., Pea, L., Bohaty S., & Persico, D., 2008. Middle Eocene-late Oligocene climate variability: Calcareous nannofossil response at Kerguelen Plateau, Site 748. Marine Micropaleontology, 69: 173-192.

Watkins, D.K., Wise Jr., S.W., Pospichal, J.J., & Crux, J., 1996. Upper Cretaceous calcareous nannofossil biostratigraphy and paleoceanography of the Southern Ocean. In: Moguilevsky, A., & Whatley, R., (eds.), Microfossils and oceanic environments. University of Wales, Aberystwyth Press, 55-381.

Watkins, D.K., & Self-Trail, J.M., 2005. Calcareous nannofossil evidence for the existence of the Gulf Stream during thelate Maastrichtian. Paleoceanography, 20 (3): 1-9.

Williams, J.R., & Bralower, T.J., 1995. Nannofossil assemblages, fine fraction stable isotopes, and the paleoceanography of the Valanginian-Barremian (Early Cretaceous) North Sea Basin. Paleoceanography, 10 (4): 815-839.

Worsley, T.R., 1971. Calcareous nannofossil zonation of Upper Jurassic and Lower Cretaceous sediments from the Western Atlantic. Proceeding of the second Planktonic Conference Roma, 2: 1301-1322.