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jzs-10778

Palaeoenvironmental Interpretation of the Upper Triassic Baluti Formation in two selected sections at Amediya District, Kurdistan Region- Iraq: Insights from Palynofacies Study

 

Nahida M. Azo1*, Majeed T. Hanna2, Ayad N. F. Edilbi1

1 Department of Petroleum Geosciences, Faculty of Science, Soran University, Soran, Kurdistan Region- Iraq.

2 Department of Geology, College of science, University of Salahaddin, Erbil, Kurdistan Region- Iraq.

 

Original: 3 November 2019       Revised: 7 January 2019      Accepted: 30 January 2020         Published online: 20 June 2020  


Doi Linkhttps://doi.org/10.17656/jzs.10778


Abstract

Palynofacies analysis was carried out on 28 outcrop samples from the Upper Triassic Baluti Formation from Zewa and Sararu Sections in south and northwestern of Amediya District respectively, Kurdistan Region- Iraq. Based on the studied palynofacies, both sections are quite different in terms of depositional environment. Four types of palynofacies were recognized as following: the palynofacies type IV (Pl.1) is observed in the lower, middle and upper portions of upper part of Zewa Section in which, is characterized by high amount of phytoclasts, medium percentage of amorphous organic matter (AOM) and palynomorphs. This facies is referred to a depositional area that is located relatively nearshore with an arid hinterland, the palynofacies type V (Pl.2) was observed in lowermost and middle portions of upper part of Zewa Section, which is characterized by high domination of palynomorphs (mainly bisaccates and monosaccate pollen grains) and a less amount of phytoclasts and AOM. This facies indicates the domination of shallow marine to continent environment. The palynofacies type VI (Pl.3) was observed in middle and upper portions of upper part of the Zewa Section and lower and upper parts of the Sararu Section. This facies showed less amount or absence of palynomorphs, and relatively high amount of AOM and phytoclasts. In addition to this, a remarkable percentage of dinoflagellate cysts in Sararu Section has been found in this facies. This facies indicates proximal suboxic-anoxic shelf, and palynofacies type IX (Pl.4) was observed in middle to upper part of Sararu Section and characterized by less amount or absence of palynomorphs with high amounts of AOM and phytoclasts, which represents a deep environment of deposition.


Key Words: Baluti Formation, Kurdistan Region, Palynofacies, Depositional Environment, Sedimentary Organic Matter


 
 References

[1] Akram, R.K. "Palynofacies and Source Rock Evaluation of Baluti Formation (Late Triassic) in two selected wells, in Duhok Governorate, Iraqi Kurdistan Region". M.Sc. Thesis. Salahaddin University-Erbil. 103p. (2016).

[2] Al-Ameri, T.K., Al-Dolaimy, Q. H. and Al-Khafaji, A.J. "Palynofacies and hydrocarbon generation potential of the Upper Triassic Kurra Chine Formation and lower part of the Baluti Formation, Mosul Block, North western Iraq". Arabian Journal of Geosciences. DOI: 10.1007/s12517-009-0041-5, pp.273-283. (2009).

[3] Allameh, M. and Nejad, E.G. "Palynology and Palynofacies of Santonian-Maastrichtian strata (Abtalkh Fm.) in eastern Koppeh-Dagh Basin, NE of Iran". Arabian Journal of Geosciences, Vol. 9, No. 3, pp. 207. (2016).

[4] Batten, D. J. and Stead, D. T. "Palynofacies analysis and its stratigraphic application, Applied Stratigraphy": Springer, Dordrecht. Vol. 23, pp. 203-226. (2005).

[5] Bellen, V. R., Dunnington, H., Wetzel, R. and Morton, D. "Lexique Stratigraphique International, III", Asie, fasc. 10a, Iraq, Center national de la recherché Scientifique, Paris. 333 p. (1959).

[6] Buday, T. "The regional geology of Iraq, vol. 1: stratigraphy and paleogeography". Mosul, Iraq, Dar Al-Kutub Publishing House, University of Mosul. 445 p. (1980).

[7] Carvalho, D. A., Marcelo, Mendonça Filho, J. G. and Menezes, T. R. "Palaeoenvironmental reconstruction based on palynofacies analysis of the Aptian-Albian succession of the Sergipe Basin, Northeastern Brazil", Marine Micropaleontology, Vol. 59, No. 1, pp. 56-81. (2006).

[8] Combaz, A. "Les palynofacies", Rev. Micropaléont. Vol. 7, pp. 205-218. (1964).

[9] Edilbi, A.N.F., Maleko, M.A., Mohamed, A.Y. and Bowden, S.A. "Evaluating the Baluti Formation at Sararu village, Ora Anticline, Iraqi Kurdistan: a stratigraphic and geochemical approach". Arabian Journal of Geosciences. Vol. 10, No. 3, pp.73. (2017).

[10] Hanna, M.T. "Palynology of the upper part of Baluti Formation (Upper Triassic) and the nature of its contact with the Sarki Formation (Lower Jurassic) at Amadiya district, Northern Iraq". Unpublished Ph.D. Thesis. Mosul University. 143 p. (2007).

[11] Isamel, J. and Orhan, H. "Palynofacies analysis of Naokelekan formation, Northern Iraq". Oil Shale. Vol. 36, No. 2, pp. 318-336. (2019).

[12] Jassim, S.Z. & Buday, T. "Tectonic Framework". In: S.Z. Jassim and J.C. Goff (eds.), Geology of Iraq. Dolin, Prague and Moravian Museum, Brno, Czech Republic, pp.45-56. (2006).

[13] Jassim, S.Z., Buday, T., Cicha, I. and Prouza, V. "Chapter 9. Late Permian - Liassic Megasequence AP6". In: Jassim, S.Z., Goff, J.C., (eds.), 2006. Geology of Iraq. Dolin, Prague and Moravian Museum, Brno, Czech Republic, pp.104-116. (2006).

[14] Mustafa, B.H. "Geochemistry, Provenance and Tectonic Setting of Alumina-rich Shale of Baluti Formation in Two Selected Sections, Iraqi Kurdistan Region". Unpublished M.Sc. Thesis. Salahaddin University-Erbil. 139 p. (2015).

[15] Oskay, R.G. "Palynofacies analyses of coal bearing sediments in the Çanakkale-Çan basin (NW Turkey)". (Doctoral dissertation, DEÜ Fen Bilimleri Enstitüsü). 85 p. (2009).

[16] Powell, A. J., Dodge, J.D. and Lewis, J. "Late Neogene to Pleistocene palynological facies of the Peruvian continental margin upwelling". Leg 112. Proc. Ocean. Drilling project, scientific results college station Texas, Vol. 112, pp. 297-321. (1990).

[17] Sissakian, V.K. "Geological map of Iraq (scale 1:1000000, sheet No.1, 3rd edition)".GEOSURV, Baghdad, Iraq. (2000).

[18] Traverse, A.I. "Paleopalynology", Unwin-Hyman, Boston. 600 p. (1988).

[19] Tyson, R.V. "Palynofacies investigation of Callovian (Middle Jurassic) sediments from DSDP Site 534, Blake-Bahama Basin, western Central Atlantic". Marine and Petroleum Geology. Vol. 1, No. 1, pp.3-13. (1984).

[20] Tyson, R.V. "Palynofacies analysis". In Applied micropaleontology. Springer, Dordrecht. pp. 153-191. (1993).

[21] Tyson, R.V. "Sedimentary organic matter; Organic Facies and Palynofacies": Chapman - Hall, London, 615 p. (1995).

[22] Wetzel, R. "Stratigraphy survey in North Iraq". MPC report, NMCO Library No.139, Baghdad. (1950).

  


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