قشرة الجبسوم في الجزء العلوي من تكوين فتحة في منطقة المحلبية شمال غرب العراق
Other Title(s)
Gypcrete in the upper part of fat`ha formation at Mahalabia Area Nw Iraq
Joint Authors
أغوان، ثامر عبد الرزاق داوود
سالم حامد حسين
ساجد، عمر خلوق محمد
Source
Issue
Vol. 8, Issue 2 (30 Nov. 2008), pp.50-63, 14 p.
Publisher
University of Mosul College of Science
Publication Date
2008-11-30
Country of Publication
Iraq
No. of Pages
14
Main Subjects
Earth Sciences, Water and Environment
Abstract EN
Gypcrete with a thickness between (4 - 8) meters occur at the upper part of Fat`ha Formation at Mahalabia area, northwest of Iraq.
The gypcrete consists of several zones which are lacking stratification.
It has been divided on the basis of textures and characteristic structures into three types.
These are from bottom to top: subsurface crust, followed by friable gypcrete and the hard surface gypcrete.
This last crust is exposed at the surface and consists of gypsum polygons of different shapes and sizes and are characteristic of this zone.
The three zones were formed by different diagenetic processes caused by groundwaters and the alternation of dry and wet periods.
Calcrete as well as gypcrete also formed due to these processes.
The calcrete exhibits alpha fabrics which often reveal the influence of physico-chemical processes and calcite pseudomorph after gypsum.
All these features indicate that the calcrete is associated with gypsum crust, probably during the early stages of diagenesis through pedogenesis.
The source of gypsum and carbonates of these crusts were most likely the bed rocks of Fat`ha Formation.
The majority of gypsum crystals were formed insitu, mainly from groundwaters by displasive growth within the host sediment.
American Psychological Association (APA)
أغوان، ثامر عبد الرزاق داوود وسالم حامد حسين وساجد، عمر خلوق محمد. 2008. قشرة الجبسوم في الجزء العلوي من تكوين فتحة في منطقة المحلبية شمال غرب العراق. المجلة العراقية لعلوم الأرض،مج. 8، ع. 2، ص ص. 50-63.
https://search.emarefa.net/detail/BIM-332323
Modern Language Association (MLA)
أغوان، ثامر عبد الرزاق داوود....[و آخرون]. قشرة الجبسوم في الجزء العلوي من تكوين فتحة في منطقة المحلبية شمال غرب العراق. المجلة العراقية لعلوم الأرض مج. 8، ع. 2 (تشرين الثاني 2008)، ص ص. 50-63.
https://search.emarefa.net/detail/BIM-332323
American Medical Association (AMA)
أغوان، ثامر عبد الرزاق داوود وسالم حامد حسين وساجد، عمر خلوق محمد. قشرة الجبسوم في الجزء العلوي من تكوين فتحة في منطقة المحلبية شمال غرب العراق. المجلة العراقية لعلوم الأرض. 2008. مج. 8، ع. 2، ص ص. 50-63.
https://search.emarefa.net/detail/BIM-332323
Data Type
Journal Articles
Language
Arabic
Notes
يتضمن مراجع ببليوجرافية : ص. 62-63
Record ID
BIM-332323