Scientific Quarterly Journal of Geosciences

Scientific Quarterly Journal of Geosciences

Facies, depositional environment and diagenesis of the Mobarak Formation in Valiabad area, Central Alborz

Document Type : Original Research Paper

Authors
N Kohansal-Ghadimvand 1
Sh Gholipouri 2
P Ghazanfari 3
R Mahari 4
1 Assistant Professor, Department of Geology, Islamic Azad University North Tehran Branch, Tehran, Iran
2 Ph.D. Student, Department of Geology, Islamic Azad University North Tehran Branch, Tehran, Iran
3 Assistant professor, Department of Geology, Faculty of science, Imam Khomeini International University of Gazvin, Gazvin, Iran
4 Assistant professor, Department of Geology, Islamic Azad University Tabriz Branch, Tabriz, Iran
10.22071/gsj.2016.41220
Abstract
The aim of this study is to determine microfacies and diagenetic processes of the Mobarak Formation with the age of early Carboniferous in Valiabad section, at Karaj-Chalus road.  The thickness of the formation at this section is 339 m and consists of limestone with intercalations of shale and marl. According to lithological characteristics, the MobarakFormationis subdivided into 8 rock units and is disconformably overlain by the Lalun Formation and underlain by Dozdeband Formation. Thirteen microfacies have been recognized on the basis of depositional texture and petrographic analysis. These carbonate facies belong to four major sub- environments including beach/tidal flat, lagoon, barrier/sand shoal and open marine. The formation deposited in a homoclinal carbonate ramp. 
Keywords
Valiabad
Mobarak Formation
Carboniferous
Facies
Sedimentary Environment
Homoclinal carbonate ramp
Central Alborz
Scientific Quarterly Journal of Geosciences
Volume 25, Issue 98 - Serial Number 98
No. 98, Winter 2016
Winter 2016
Pages 237-248