Microbiostratigraphy of Middle Eocene ShahbazanFormation at the southeastern flank of Chenar Anticline,Lurestan Basin, Sw Iran

Iranian Journal of Earth Sciences

مقاله 4، دوره 5، شماره 2، دی 2013، صفحه 74-81   

نوع مقاله: Original Research Paper

نویسندگان

I. Maghfouri Moghadam¹؛ M. Taherpour Khalil Abad²

¹Department of Geology, Faculty of Science, Lorestan University, Khorram-Abad, Iran

²Young Researchers Club and elites, Mashhad Branch, Islamic Azad University, Mashhad, Iran

چکیده

In this research, biostratigraphy related to the carbonate succession of the Shahbazan Formation at the southeastern flank of Chenar anticline, Lurestan Basin, is discussed. A study of large benthic foraminifera from the 294 mthick Shahbazan Formation led to the identification of two Middle Eocene biozones: Somalina sp. Zone, Nummulites-Alveolina Assemblage Zone. The age of the Shahbazan Formation in the study area is determined as Middle Eocene. The Shahbazn Formation overlies the Pabdeh Formation and underlies Asmari Formation in the studied stratigraphic section. The lower part of Asmari Formation is characterized by thick – bedded of limestone, with Nerpherolepidina sp., which reflects deposition during Chattian age. In this study, we introduced a paraconformity between Shabazan and Asmari Formations which is attributed to the PriabonianChattian.

کلیدواژه‌ها

Eocene؛ benthic foraminifera؛ Biostratigraphy؛ Lurestan Basin؛ SW Iran