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

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Authors:


Doaa T.Fadhil, orcid.org/0000-0001-5042-6905, Department of Civil Engineering, College of Engineering, University of Samarra, Samarra, Iraq

Mustafa A.Theyab, orcid.org/0000-0003-4711-637X, 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, orcid.org/0000-0002-3810-2382, 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

https://doi.org/10.33271/nvngu/2021-6/011



Abstract:



Purpose.
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.


Methodology.
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.


Findings.
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.


Originality.
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.



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

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