Biostratigraphy of the late Eocene-Miocene (Jahrum & Asmari Formations) in the west and southeast of the Shahr-e kord (Central Zagros)

Authors

1 PhD. student, Department of Geology, Khorramabad Branch, Islamic Azad University, Khorramabad, Iran

2 Department of Geology, Khorramabad Branch, Islamic Azad University, khorramabad, Iran.

3 2Department of Petroleum Engineering, Masjed Soleiman Branch, Islamic Azad University, Masjed Soleiman, Iran

4 Department of Geology, Khorramabad Branch, Islamic Azad University, Khorramabad, Iran

5 1Department of Geology, Khorramabad Branch, Islamic Azad University, Khorramabad, Iran

Abstract

Jahrum Formation has deposited Paleocene to Eocene in Zagros Basin (mainly Fars area). At the first time, the type section of this formation was introduced in the Tang-e-Ab at the northern limb of Jahrum Mount by James and Wynd (1965). In the type section, Jahrum Formation is located on the Sachun Formation with a conformable contact and has discontinuous contact with the Asmari Formation at the top (Motiei.1372). The carbonate Asmari Formation Oligocene to Miocene age, is the most important reservoirs rock of Basin Zagros. Richardson (1924) measured the type section of this formation in Asmari Mount (Tang-e-Goltorsh). Asmari Formation has different characteristics lithostratigraphy and biostratigraphy at the different parts of Zagros Basin. The studied sections have not been investigated biostratigraphy formations, So far. In this research, an attempt has been made to study biostratigraphy, presentation suitable biozones, and determinate age’s deposits of Asmari and Jahrum formations, in Isa Abad and Imamzadeh Gahroo sections in Central Zagros.

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References

Adams, C., Bourgeois, E., 1967. Asmari biostratigraphy. Geological and Exploration Division. Iranian Oil Offshore Company, Report 1074 Unpublished.
Ahmadi, V., Izadi, S., Dehghani, S. Motahariyan, A., 2009. Microbiostratigraphic studies on Jahrum and Asmari Formations in Kaftarak and Runiz sections (Fars province). Third Symposium of Iranian Paleontological Society, 11-15.
Ehrenberg, S.N., Pickard, N.A.H., Laursen, G.V., Monibi, S., Mossadegh, Z.K., Svånå, T.A., Aqrawi, A.A.M., Mcarthur, J.M., Thirlwall, M.F., 2007. Strontium isotope stratigraphy of the Asmari Formation (Oligocene - lower Miocene), SW Iran. Journal of Petroleum Geolology 30, 107–128. https://doi.org/10.1111/j.1747-5457.2007.00107.x.
Gradstein, F., Ogg, J., Smith, A., 2005. A Geologic Time Scale 2004. Cambridge University Press. P. 589. https://doi:10.1017/CBO9780511536045.
James, G.A., Wynd, J.G., 1965. Stratigraphic nomenclature of Iranian oil consortium agreement area. American association petroleum geologists bulletin 49, 2182–2245.
Joudaki, M., Noroozpour, H., Mahmoodi Panah, F., Baghbani, D., Lak, R., 2021. The Oligocene to Lower Miocene depositional sequences of the Zagros Basin, SW Iran. Geological Journal 56(7), 1-12. https://doi.org/10.1002/gj.4111.
Khosrotehrani, Kh., Afghah, M., Ahmadi, V., 2007. Paleoecology and Biozonation of Late Paleocene to Early Miocene Benthic Foraminifers in North & South East Shiraz. Scientific Quarterly Journal of Geosciences 16(63), 50-59. https://doi.org/10.22071/gsj.2008.58441.
Laursen, G.V., Monibi, S., Allan, T.L., Pickard, N.A.H., Hosseiney, A., Vincent, B., Hamon, Y., Buchem, F.S.P.V., Moallemi, A., Druillion, G., 2009. The Asmari Formation Revisited: Changed Stratigraphic Allocation and New Biozonation. First International Petroleum Conference and Exhibition Shiraz, Iran, https://doi.org/10.3997/2214-4609.20145919.
Motiei, H., 2003. Stratigraphy of Zagros. Geological Survey and Mineral Exploration of Iran, p. 636.
Nafarieh, E., Vaziri-Moghaddam, H., Taheri, A., 2009. Biostratigraphy and palaeoecology of Jahrum Formation in northern of the Kuh-e Gach anticline, Lar area. Journal of Science 35(4),  11-19.
Nikfard, M., Vaziri-Moghaddam, H., Seyrafian, A., Behdad, A., Shabafrooz, R., 2020. A review of the Oligo–Miocene larger benthic foraminifera in the Zagros basin, Iran; New insights into biozonation and palaeogeographical maps. Revue de Micropaléontologie 66, 1-22. https://doi.org/10.1016/j.revmic.2020.100408.
Parvaneh Nejad Shirazi, M., Balood, S., 2015. Microbiostratigraphy, facies and sedimentary environment of the Jahrum Formation. northwest of Shiraz, Applied Sedimentology 3(5), 43-53.
Parvaneh Nejad Shirazi, M., Seddighi, M., Balicheh khorram abadi, P., 2020. Lithostratigraphy, Microbiostratigraph and Sedimentary environment of Jahrum Formation in northwest of Shiraz (Chellehgah Sepidan). Scientific Quarterly Journal of Geosciences 29(116), 229-238. https://doi: 10.22071/gsj.2019.163457.1588.
Richardson, R.K., 1924. The geology and oil measures of southwest Persia. Journal of the Institute of Petroleum 1, 256-283.
Sadeghi, R. and Jokar, M., 2018. Microbiostratigraphy of the Jahrum Formation in Nimbashi section, West Estahban, Fars. Stratigraphy and Sedimentology Researches 34(3), 73 -94. https://doi.org/10.22108/jssr.2019.113070.1069.
Thomas, A.N., 1948. The Asmari Limestone of Southwest Iran, AIOC Report, No.705. (Unpub).
van Buchem, F.S.P., Allan, T.L., Laursen , G.V., Lotfpour,  M., Moallemi, A., Monibi,  S., Motiei,  H., Pickard, N.A.H., Tahmasbi, A.R., and VedrenneVand Vincent, B., 2010. Regional stratigraphic architecture and reservoir types of the Oligo-Miocene deposits in the Dezful Embayment (Asmari and Pabdeh formations) SW Iran. Geological Society, London, Special Publications 329, 219–263. https://doi.org/10.1144/SP329.10.
Wynd, J.G., 1965. Biofacies of the Iranian consortium- agreement area. Unpublished Report 1082. Iranian Offshore Oil Company, Iran. P. 213.
Advanced Applied Geology
Volume 13, Issue 3
October 2023
Pages 641-660

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