Diagenetic history and porosity types of the baluti formation (UPPER TRIASSIC), galley derash, Duhok Governorate, Kurdistan Region, Northern Iraq
Other Title(s)
التأريخ التحويري و أنواع المسامية لتكوين بلوطي (الترياسي الأعلى) في مقطع كلي ديرش، محافظة دهوك، إقليم كوردستان، شمال العراق
Joint Authors
Asad, Irfan Shaban
Umar, Muhammad Fakhri
Source
Iraqi Bulletin of Geology and Mining
Issue
Vol. 15, Issue 2 (31 Dec. 2019), pp.51-70, 20 p.
Publisher
Ministry of Industry and Minerals Iraqi Geological Survey
Publication Date
2019-12-31
Country of Publication
Iraq
No. of Pages
20
Main Subjects
Earth Sciences, Water and Environment
Topics
Abstract EN
The Baluti Formation in the Galley Derash locality is comprised of 73 m brecciated dolomitic limestone in the lower part, alternating with thin bedded dolomitic limestone and dark gray shale in the middle part, then thin to medium bedded brecciated sandy limestone interbedded with dark grey shale in its upper part.
The sum of 21 thin sections of the Baluti Formation carbonates are petrographically studied using polarizing microscope.
The results show various types of skeletal grains including calcareous algae, ostracods, brachiopods, bivalves, benthonic foraminifera, gastropods, and echinoderms, while the non-skeletal grains include peloids, intraclasts, extraclasts and rare ooids.
The Baluti Formation was subjected to differed diagenetic processes such as micritization, mechanical compaction, cementation, early dolomitization, neomorphism, stylolitization, late dolomitization, dedolomitization, silisification, soulution, fracturing and pyritization.
These diagenetic modifications occurred during marine phreatic shallow burial stage and were activated during intermediate to deep burial and uplift in the late stages.
Five kinds of dolomite textures are recognized: Unimodal very fine to fine-crystalline planar-s (subhedral) mosaic, unimodal very fine to fine-crystalline planar-e (euhedral) mosaic, unimodal fine to medium crystalline planar-s (subhedral) mosaic, medium to coarsecrystalline planar to non-planar-c (cement) mosaic and polymodal planar-s (subhedral) to planar-e (euhedral) mosaic.
The petrographic study revealed that the secondary porosity is dominant.
The paragenetic history of the Baluti Formation passed through four diagenetic environments which are: marine, meteoric, burial and uplift.
American Psychological Association (APA)
Asad, Irfan Shaban& Umar, Muhammad Fakhri. 2019. Diagenetic history and porosity types of the baluti formation (UPPER TRIASSIC), galley derash, Duhok Governorate, Kurdistan Region, Northern Iraq. Iraqi Bulletin of Geology and Mining،Vol. 15, no. 2, pp.51-70.
https://search.emarefa.net/detail/BIM-910468
Modern Language Association (MLA)
Asad, Irfan Shaban& Umar, Muhammad Fakhri. Diagenetic history and porosity types of the baluti formation (UPPER TRIASSIC), galley derash, Duhok Governorate, Kurdistan Region, Northern Iraq. Iraqi Bulletin of Geology and Mining Vol. 15, no. 2 (2019), pp.51-70.
https://search.emarefa.net/detail/BIM-910468
American Medical Association (AMA)
Asad, Irfan Shaban& Umar, Muhammad Fakhri. Diagenetic history and porosity types of the baluti formation (UPPER TRIASSIC), galley derash, Duhok Governorate, Kurdistan Region, Northern Iraq. Iraqi Bulletin of Geology and Mining. 2019. Vol. 15, no. 2, pp.51-70.
https://search.emarefa.net/detail/BIM-910468
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 67-69
Record ID
BIM-910468