Facies analysis and sequence stratigraphy of Kometan Formation (Upper Cretaceous) in the imbricated zone, northeastern Iraq

Balaky, Sardar M.; Asaad, Irfan Sh.; Al-Juboury, Ali I.

doi:10.1007/s12517-016-2794-y

Cited by 13 publications

(4 citation statements)

References 23 publications

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“…Ostracods found in marine, transitional and fresh water, found at various depths (Haq & Boersma, 1998). Pelecypods deposited in different environments from near-shore to off-shore environments (Clarkson, 1998;Balaky et al, 2016) and it with gastropods are common in shallow lagoon with open circulation (Flügel, 2010). The peloidal packstone microfacies developed in protected lagoon environments with moderate water circulation (Flügel, 2010).…”

Section: Discussionmentioning

confidence: 99%

Microfacies Analysis And Depositional Environment Of Pila Spi Formation (Middle - Late Eocene) In The Nerwa Section, Berat Anticline, High Folded Zone, Kurdistan Region, Northern Iraq

Asaad¹

2022

BGSM

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Microfacies analysis and depositional environment of the Pila Spi Formation (Middle-Late Eocene) were studied in the Nerwa outcrop, Berat anticline, High Folded Zone in Iraqi Kurdistan Region. The total thickness of the formation is 13.5 m composed of medium to thick bedded yellow to white limestone and thick bedded grey to white dolomitic limestone. It is interbedded with thin beds of yellow marl in the lower part and have chert nodules in the upper part. The petrographic study of 17 thin sections of the Pila Spi carbonate showed that the majority of the carbonates are micritic mixed with some microspar. The skeletal grains involve benthonic foraminifera, ostracods, mollusca, dasycladacean green algae, pelecypods, gastropods, rare planktonic foraminifera and bioclasts. Non skeletal grain included peloids, intraclasts and extraclasts which is mainly monocrystalline quartz grain. Based on field observations and petrographic analysis, three different lithological units were distinguished in the Pila Spi Formation in the studied section. They are in ascending order: medium to thick bedded limestone interbedded with marl unit, thick bedded dolomitic limestone unit and, cherty limestone unit. Depending on detailed microfacies analysis of carbonate rocks, three main microfacies and twelve submicrofacies were recognized in the studied section of the Pila Spi Formation. From the sum of all petrographic, facies and textural analyses, it is here concluded that Pila Spi Formation in the Nerwa section was deposited at subtidal semi-restricted lagoon, in lower part gradually changed to open lagoon environment toward the upper part.

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Section: Discussionmentioning

confidence: 99%

Microfacies Analysis And Depositional Environment Of Pila Spi Formation (Middle - Late Eocene) In The Nerwa Section, Berat Anticline, High Folded Zone, Kurdistan Region, Northern Iraq

Asaad¹

2022

BGSM

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“…The bottom contact is not conformable with the Qamchuqa Formation because of the loss of Cenomanian era and the upper surface is not conformable with the Shiranish Formation. The environmental deposition is a deep Pelagic environment (Balaky, et al, 2016). • Shiranish Formation (Maastrichtian-Campanian): It consists of successive thin layers of marl and marly Limestone with calcite veins.…”

Section: Figmentioning

confidence: 99%

Slope Stability Analysis of the Southwestern Limb of Kosret Anticline in Dokan, Northeastern Iraq

Zarraq

2021

IGJ

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The stability of the rock slopes was studied on the southwestern limb of the Kosret Anticline in the Dokan Area in northeastern Iraq to analyze and indicate the danger of rock mass failures along the public street linking Dokan and Quesangaq, Erbil and the road which link between the city and the residential neighborhood of Dokan Lake, as well as the revealing and the analysis of the risk of landslides in the slopes and rocks detectors of exposed rocks of the formations in the study area. The stereographic projection was used in the analysis and classification of the rock slopes. This study has shown that the failures of rocks are fall and day lighting bedding plane. The factors that affect the stability of the slopes were assessed. This research mainly focuses on identifying the types of collapses along the rocky slopes and the factor that affects the instability of the studied slopes. It was found that it is the direction slopes and the interruption geometry. Different treatment methods have been proposed for the studied rock base on the rock slope analysis. The expected failure types that may occur along the road are plane sliding, rock fall, toppling, and probably the failure type in the future may be planner sliding due to the angle of the friction comes to zero degree. The rocky slopes along the road require constant monitoring due to their hazardous conditions. Where it was found that the attitude of the joints and their frequency with the relation between the attitude of the slopes and the rock beds played an important role in the failures, as well as the weak rocks of the Marl layers of the Shiranish, Kometan and Tanjero formations play a key role in responding to weathering and erosion factors that increase the failures of rock slopes.

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“…Due to its economic importance and wide distribution, the formation has been described in a variety of academic publications ([e.g. [7][8][9][10][11][12][13][14]. Most of them were focused on bio-and lithostratigraphy, the origin of stylolite and chert nodules, sequence stratigraphy, and paleoenvironmental proxies of the Kometan Formation in Iraq.…”

Section: Introductionmentioning

confidence: 99%

Facies Analysis, Diagenetic Features and Depositional Environment of the Kometan Formation from Northeastern Iraq

Al-Juboury,

Sulaiman,

Al-Mutwali

et al. 2023

Iraqi Journal of Science

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This study involves microfacies analysis of the Kometan Formation from northeastern Iraq supported by detailed petrographic investigation for the main components and diagenetic processes using a petrographic microscope, scanning electron microscope (SEM), and X-Ray diffraction (XRD). The techniques have revealed that the formation includes two microfacies; lime wackestone and lime packstone microfacies which in turn are subdivided into seven sub-microfacies, that were deposited in the quiet and deep marine environment. Planktonic foraminifera (keeled and globular chamber types) are dominant, along with oligostegina in addition to subordinate benthonic foraminifera and fine-grained bioclasts. Calcite forms the main mineralogical composition in euhedral (rhombohedral), microcrystals, star-shaped, and columnar crystals in addition to pyrite and glauconite. All components are embedded in the micritic groundmass. The main diagenetic processes affecting the studied rocks include; chemical compaction (stylolite formation), dissolution, recrystallization, and cementation.

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Facies analysis and sequence stratigraphy of Kometan Formation (Upper Cretaceous) in the imbricated zone, northeastern Iraq

Cited by 13 publications

References 23 publications

Microfacies Analysis And Depositional Environment Of Pila Spi Formation (Middle - Late Eocene) In The Nerwa Section, Berat Anticline, High Folded Zone, Kurdistan Region, Northern Iraq

Microfacies Analysis And Depositional Environment Of Pila Spi Formation (Middle - Late Eocene) In The Nerwa Section, Berat Anticline, High Folded Zone, Kurdistan Region, Northern Iraq

Slope Stability Analysis of the Southwestern Limb of Kosret Anticline in Dokan, Northeastern Iraq

Facies Analysis, Diagenetic Features and Depositional Environment of the Kometan Formation from Northeastern Iraq

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