Microfacies and depositional environment of chia gara formation (upper jurassic-lower cretaceous) in Kurdistan region, Northern Iraq
Other Title(s)
السحنات المجهرية و البيئة الترسيبية لتكوين جيا كارا (الجوراسي الأعلى-الطباشيري الأسفل) في إقليم كوردستان-شمال العراق
Joint Authors
Shirwani, Govand Husayn
Idlibi, Iyad Nuri Fiqqi
Source
Iraqi Bulletin of Geology and Mining
Issue
Vol. 15, Issue 1 (30 Jun. 2019), pp.31-42, 12 p.
Publisher
Ministry of Industry and Minerals Iraqi Geological Survey
Publication Date
2019-06-30
Country of Publication
Iraq
No. of Pages
12
Main Subjects
Earth Sciences, Water and Environment
Topics
Abstract EN
The depositional environment of Chia Gara Formation (Upper Jurassic – Lower Cretaceous) in Northern Iraq is studied.
The formation is exposed in the High Folded Zone, and Imbricated Zone of Iraq.
The selected sections for this study are Banik (outcrop), Barsarin, (outcrop) and well Aj-12; located in the High Folded, Imbricated, and Foothill Zones respectively.
The Chia Gara Formation is lithologically composed of black shale, thinly bedded brown argillaceous limestone, thin to medium limestone, and marly limestone in uppermost part.
Skeletal grains consist of macro and micro pelagic fauna.
Pelagic fossils include Ammonites, radiolarian (Spumellarian Group), ostracods, planktonic forams (Globigerina), pelecypods, and others.
Non-skeletal grains are not observed in the current study.
The groundmass of the Chia Gara Formation is dominated by micrite which is often replaced by coarser microspar.
Limestones of Chia Gara Formation are divided into three principal microfacies: Mudstone, Wackestone, and Packstone.
Each of these is further subdivided into submicrofacies.
Using lithology, paleontology, and microfacies criteria, the most likely depositional environment of the Chia Gara Formation is concluded as toe of slope to deep open marine environment
American Psychological Association (APA)
Shirwani, Govand Husayn& Idlibi, Iyad Nuri Fiqqi. 2019. Microfacies and depositional environment of chia gara formation (upper jurassic-lower cretaceous) in Kurdistan region, Northern Iraq. Iraqi Bulletin of Geology and Mining،Vol. 15, no. 1, pp.31-42.
https://search.emarefa.net/detail/BIM-880431
Modern Language Association (MLA)
Shirwani, Govand Husayn& Idlibi, Iyad Nuri Fiqqi. Microfacies and depositional environment of chia gara formation (upper jurassic-lower cretaceous) in Kurdistan region, Northern Iraq. Iraqi Bulletin of Geology and Mining Vol. 15, no. 1 (2019), pp.31-42.
https://search.emarefa.net/detail/BIM-880431
American Medical Association (AMA)
Shirwani, Govand Husayn& Idlibi, Iyad Nuri Fiqqi. Microfacies and depositional environment of chia gara formation (upper jurassic-lower cretaceous) in Kurdistan region, Northern Iraq. Iraqi Bulletin of Geology and Mining. 2019. Vol. 15, no. 1, pp.31-42.
https://search.emarefa.net/detail/BIM-880431
Data Type
Journal Articles
Language
English
Notes
Includes appendix : p. 42
Record ID
BIM-880431