Petrographical and microfacies study of Sinjar formation in Bazyan anticline, Sulaimaniyah region (Northern Iraq)

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Doaa T.Fadhil,, Department of Civil Engineering, College of Engineering, University of Samarra, Samarra, Iraq

Mustafa A.Theyab,, Department of Applied Chemistry, College of Applied science, University of Samarra, Samarra, Iraq, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Aboosh Al-Hadidy,, Department of Oil and Gas Economics, College of Management and Financial, Imam Jaafar Al-Sadiq University, Kirkuk, Iraq

повний текст / full article

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2021, (6): 011 - 015


The work studies Sinjar formation (upper Paleocene lower Eocene) within the Bazyan anticline in the Sulaimaniyah region (northeastern Iraq). The facies analysis is based on the petrographic study of limestone deposits and is essential to identify their nature. The sediments that formed Sinjar formation have a high content of skeletal granules which include a small amount of red algae and residues of unicellular organisms-foraminifera.

The method of work included two main aspects: field study and laboratory work. The first part included the field description of the rocky excavation and modeling of 10 rocks samples from it within the Bazyan section. As for the second main aspect, it included the preparation of 10 slides for petrographic study of Sinjar Formation rocks followed by a facial analysis of these deposits.

Micro facial analysis showed that the sequences of Sinjar formation consist of three main facies. The wacky limestone facies bears benthic foraminifera. The facies of compact limestone bears the benthic foraminifera and red algae while the compact wacky limestone facies bears the fossils.

Wacky limestone facies bearing benthic foraminifera, compacted limestone facies bearing benthic foraminifera and red algae, and wacky limestone facies bearing benthic foraminifera were selected and studied. Thus, according to the facial analysis, Sinjar formation was deposited within the open shelf before the formation of the main deposit.

Practical value.
Samples of rocks were obtained from the Bazyan anticline for further production of slides in order to study the facies of this anticline, which allowed showing its lithostratigraphic column.

petrographic analysis, micro facies, Sinjar formation, Bazyan anticline, Benthic foraminifera


1. Sharland, P.R., Archer, R., Casey, D.M., Davies, R.B., Hall,S.H., Heward, , & Simmons, M.D. (2001). The Chrono-Sequence Stratigraphy of the Arabian Plate. GeoArabia Special Publication.

2. Ahmad, K.H.K. (2016). Facies Changes between Kolosh and Sinjar Formations along Zagros FoldThrust Belt in Iraqi Kurdistan Region. Journal of Geography and Geology, 8(1).

3. Jassim, S.Z., & Goff, J.C. (2006). Geology of Iraq. Dolin, Prague and Moravian Museum, Brno.

4. Buday, T., & Jassim, S.Z. (1987). Tectonism, Magmtism and Metamorphism. In The Reginal Geology of Iraq. Baghdad.

5. Buday, T. (1980). The regional geology of Iraq, stratigraphy and paleography: Dar AI-kutub. Pub1ishing House Mosule, Iraq.

6. Dunham, R.H. (1962). Classification of carbonate rocks according to depositional texture. In Ham, W.E. (Ed.). Classification of carbonate rocks: American Association of Petroleum Geologists Memoir, Vol.1, (pp. 108-121).

7. Flugel, E. (2010). Microfacies of carbonate rocks-analysis, interpretation and application. Springer, Verlag, Berlin, Heidelberg.

8. Al-Dulaimi, E.K., & Al-Dulaimi, S.I. (2017). A Study of Biostratigraphy of Sinjar Formation in selected sections from northern Iraq. Iraqi Journal of Science, 58(2B), 891-916.

9. Basso, D., Fravega, P., & Vannucci, G. (1996). Fossil and living corallinaceans related to the Mediterranean endemic species Lithophyllum racemes (Lamarck) fossil. Facies, 35, 275-292.

10. Braga, J.C., & Aguirre, J. (1994). Taxonomy of fossil coralline algal species: Neogene Lithophylloideae (Rhodophyta, Corallinaceae) from southern Spain. Review of Palaeobotany and Palynology, 86, 265-285.

11. Preseut, T.M., Adkins, J.F., & Grotzinez, J.P. (2017). Digenetic Systematic of Carbonate facies of the yate, Capitan and Bell canyon formations, Guadalupe Mountains National Park, (pp. 15-28). Tx. AAPG Houston, Texas.

12. Warren, J. (2000). Dolomite: Occurrence, Evolution, and Economically Important Association. Earth-Science Reviews, 52, 1-81.

13. Boggs, S.J. (2006). Principles of Sedimentology and Stratigraphy. (4th ed.). Person Prentic-Hall.

14. Flgel, E. (2004). Microfacies of Carbonate Rocks: Analysis, Interpretation and Applications. Berlin: Springer-Verlag.

15. Wilson, J.L. (1975). Carbonate facies in geologic history. Berlin: Springer-Verlag.

16. Henson, F.R. (1950). Cretaceous and tertiary reef Formation and associated sediments in Middle East. AAPG Bulletin, 34, 215-238.

17. Anketell, J.M., & Mriheel, I.Y. (2000). Depositional environment and diagenesis of the Eocene Jdeir Formation, Gabes-Tripoli basin, western offshore, Libya. JPGS, 23, 425-447.

18. Chose, B.K. (1977). Paleoecology of the Cenozoic reefal forminifer and algae-A brief review. Palaeogeography Palaeoclimatology, Paleoecology, 22, 231-256.

19. Vennin, E., Van Buchem, F.S.P., Joseph, P., Gaumet, F., Marc,S., Rebelle, M., , & Zijistra, H. (2003). A 3D outcrop analogue model for Ypresian nummulitic carbonate reservoirs: Jebel Ousselat, northern Tunisia. Petroleum Geoscience, 9(2), 145-161.

20. Jassim, S.Z., & Buday, T. (2006). Middle PaleoceneEocene Megasequence (AP 10). In: Jassim, S.Z., & Goff, J.C. (Eds.). Geology of Iraq, (pp.155-167). Dolin, Prague and Moravian Museum, Brno.

21. Numan, N.M. (1997). A plate tectonic scenario for the Phanerozoic succession in Iraq. Iraqi Geological Journal,30(2), 85-110.



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