Biostratigraphy of Dariyan Formation in Lar Anticline (north east Gachsaran) and Lower Cretaceous sediments in Kuh-eKolah Ghazi (soth west Isfahan)

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Shirzade M.; VAZIRI MOGHADDAM H.; BAHRAMI A.; SEYRAFIAN A.

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Journal: IRANIAN JOURNAL OF PETROLEUM GEOLOGY Year:2019 | Volume:9 | Issue:17 Page(s): 1-15

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Title

Biostratigraphy of Dariyan Formation in Lar Anticline (north east Gachsaran) and Lower Cretaceous sediments in Kuh-eKolah Ghazi (soth west Isfahan)

Author(s)

Shirzade M. | VAZIRI MOGHADDAM H. | BAHRAMI A. | SEYRAFIAN A. | Issue Writer Certificate

Keywords

Dariyan FormationQ2

Lar AnticlineQ1

Cretaceous sedimentsQ2

Kolah GhaziQ1

BiostratigraphyQ2

BiozoneQ1

Abstract

In order to identify foraminifera and determine the age of Dariyan Formation and the lower Cretaceous sediments of Central Iran, a section of Dariyan Formation in Lar Anticline (north east Gachsaran) (with a thickness of 111m, thick, medium and thin layer of limestone, marl and marly limestone) and a section of Kuh-e-Kolah Ghazi (south west Isfahan) (with a thickness of 260m, thick to medium layer limestone and shale) were studied. Based on biostratigraphic studies of Lar Anticline section, 28 benthonic foraminifera and 4 planktonic foraminifera have been identified in 4 Biozones contains: Hedbergellids-Orbitolinids assemblage zone, Mesorbitolina texana zone, Mesorbitolina gr. subconcava zone, Favusella washitensis rang zone. Based on biostratigraphic of Lower Cretaseous sediments in Kuh-e-Kolah Ghazi, 21 benthonic foraminifera and 1 planktonic foraminifera have been identified and consequently 2 Biozones are recognized contains: Mesorbitolina texana zone, Mesorbitolina gr. subconcava zonethe studied areas were correlated with some sections of the Dariyan in Kuh-e-Fahliyan, Kuh-e-Mangasht and Meymand. Accordingly, the sedimentation of two studied sections in Lar Anticline and Kuh-e-Kolah Ghazi were started from Late Aptian which were later than the other sections, and the end of sedimentation in the Kuh-e-Kolah Ghazi was earlier than the other sections in the Late Aptian age, while the end of sedimentation of Dariyan Formation in other sections was in Early Albian age.

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APA: Copy

Shirzade, M., VAZIRI MOGHADDAM, H., BAHRAMI, A., & SEYRAFIAN, A.. (2019). Biostratigraphy of Dariyan Formation in Lar Anticline (north east Gachsaran) and Lower Cretaceous sediments in Kuh-eKolah Ghazi (soth west Isfahan). IRANIAN JOURNAL OF PETROLEUM GEOLOGY, 9(17 ), 1-15. SID. https://sid.ir/paper/384430/en

Vancouver: Copy

Shirzade M., VAZIRI MOGHADDAM H., BAHRAMI A., SEYRAFIAN A.. Biostratigraphy of Dariyan Formation in Lar Anticline (north east Gachsaran) and Lower Cretaceous sediments in Kuh-eKolah Ghazi (soth west Isfahan). IRANIAN JOURNAL OF PETROLEUM GEOLOGY[Internet]. 2019;9(17 ):1-15. Available from: https://sid.ir/paper/384430/en

IEEE: Copy

M. Shirzade, H. VAZIRI MOGHADDAM, A. BAHRAMI, and A. SEYRAFIAN, “Biostratigraphy of Dariyan Formation in Lar Anticline (north east Gachsaran) and Lower Cretaceous sediments in Kuh-eKolah Ghazi (soth west Isfahan),” IRANIAN JOURNAL OF PETROLEUM GEOLOGY, vol. 9, no. 17 , pp. 1–15, 2019, [Online]. Available: https://sid.ir/paper/384430/en

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