Scientific Quarterly Journal of Geosciences

Scientific Quarterly Journal of Geosciences

Comparative biostratigraphy of Asmari Formation in Maleh-Kuh and Amiran anticlines, Lorestan, Zagros basin, based on benthic foraminifera

Document Type : Original Research Paper

Authors
M Mohammadi 1
H Amiri Bakhtiar 2
F Amraee 3
1 Assistant Professor, Department of Geology, Payame_ Noor University, Theran, Iran
2 Ph. D., South Oilfield, National Iranian Oil Company, Theran, Iran
3 M. Sc., Department of Geology, Payame_ Noor University, Theran, Iran
10.22071/gsj.2016.41203
Abstract
This study aimed to compare Asmari Formation in two sections in Maleh-Kuh and Amiran anticlines based on benthonic foraminifera. In this study, 26 species and 16 genera of benthonic foraminifera from the Maleh-Kuh section yielded 2 biozones of  Elphidiumsp. 14 – Peneroplis, farsenensisandBorelismelocurdica – Borelismelomeloweresuggesting an age of Aquitanian – Burdigalian for the formation. In Amiran anticline based on 27 species and 20 genera only the biozone of Borelismelocurdica – Borelismelomelo (Burdigalian)was recorded.Based on this study, the Asmari sequence in Maleh-kuh Section (with a thicknessof 310m) deposited earlier In Aquitanian.   But in Amiran section (with a thickness 162m) deposition started in Burdigalian and ended synchronously in both sections. In both sections the Asmari Formation overlain Shahbazan Formation disconformably and is in turn under lain by Ghachsaran Formation concordantly-transitionally in Maleh-Kuh and by a sharp contact in Amiran Section.
Keywords
Comparative stratigraphy
Asmari Formation
Benthonic foraminifera
Aquitanian
Burdigalian
Malehkuh anticline
Amiran Anticline
Zagros
Lorestan
Scientific Quarterly Journal of Geosciences
Volume 25, Issue 98 - Serial Number 98
No. 98, Winter 2016
Winter 2016
Pages 191-198