文章基本信息

标题：Aptian biostratigraphy in South Zagros Basin, southwest Iran
本地全文：下载
作者：Massih Afghah ; Arash Shaabanpour Haghighi
期刊名称：Geoscience Frontiers
印刷版ISSN：1674-9871
出版年度：2014
卷号：5
期号：2
页码：277-288
DOI：10.1016/j.gsf.2013.07.001
语种：English
出版社：Elsevier
摘要：AbstractThe Khami group within the petroliferous Zagros Basin of Iran includes the Surmeh, Hith, Fahliyan, Gadvan and Dariyan formations. The Dariyan Formation, previously known as Orbitolina limestone is very significant as a reservoir rock in the Zagros Basin. In this study, the age of the Dariyan Formation is examined based on biostratigraphic and paleontological investigations. 236 m of Dariyan Formation sediments in the sections at Kuh-e Rahmat (north) and Nour-Abad (west) of Iran were selected to study its biostratigraphy. According to the lithostratigraphic investigations, the Dariyan Formation in these sections is subdivided into three: lower, middle and upper, which include thin-bedded to medium-bedded and massive limestone. Micropaleontologic study of the Dariyan Formation has led to the recognition of two biozones in the Nour-Abad area and one biozone in the Kuh-e Rahmat stratigraphic column. Diagnostic foraminifera in these sections are as follows:Globigerinelloides algerianusCushman and Ten Dam,Globigerinelloides ferreolensisMoullade,Globigerinelloides maridalensis(Bolli),Globigerinelloides paragottisiVerga and Permoli Silva,Hedbergella aptianaBartenstein,Hedbergella excelsaLongoria,Hedbergella luterbacheriLongoria,Hedbergella occultaLongoria,Hedbergella ruka(Banner et al.),Hedbergella similisLongoria,Hedbergella trocoidea(Gandolfi),Muricohedbergella delrioensis(Carsey),Pseudoplanomalina cheniourensisSigal,Conicorbitolina conicad'Archiac, Iraqia sp.,Mesorbitolina parvaDouglass,Mesorbitolina perviaDouglass,Mesorbitolina ovalisGorog and Arnaud-Vanneau,Mesorbitolina subconcavaLeymerie,Mesorbitolina texana(Roemer),Mesorbitolina ovalis-perviaCherchi and Schroeder,Debarina hahounerensisFourcade et al.,Marssonella trochus(d'Orbigny),Nezzazatasp.,Orbitolinasp.,Textulariasp.Based on the identified foraminifera, the age of the Dariyan Formation in the Kuh-e Rahmat area is assigned to Aptian, and in the Nour-Abad area is determined as upper Aptian.Graphical abstractDisplay OmittedHighlights•Biozonation of Aptian succession in the Dariyan Formation of the Zagros Basin.•Aptian pelagic biofacies is well distributed in the Fars Platform and it changes to Orbitolinid beds.•Tectonic activity influences stratigraphic distribution of Foraminifera in active faults of the Zagros area.
关键词：KeywordsenAptianBiostratigraphyForaminiferaZagrosFarsIran