OJG  Vol.4 No.12 , December 2014
Petrography, Sedimentary Environments and Sequence Stratigraphy of Asmari Formation in Central Fars, Zagros, SW (Iran)
To study petrography, microfacies, sedimentary environments and sequence stratigraphy of Asmari formation in central Fars, 4 stratigraphic sections have benn chosen and studied (Estahban, Shams-Abad, Sarvestan and Akbar-Abad Sections). Field and laboratories study recognized 16 carbonate microfacies and 2 clastic-carbanate facies. Study of microfacies, relative sea level change and sequence stratigraphy evidences show these microfacies are deposited in carbonate ramp sedimentary environment in 5 facies belt zones: Open marine (A), Restricted (B), Shoal (C), Lagoon (D) and Tidal flat (E) during Oligomiocene. Petrography, microfacies analysis and sedimentary environment of Asmari formation shows this formation in study area consist of 3 depositional sequences. Lower sequence boundary of DS1 with Jahrum formation is erosional (disconformity) SB1. Lower and upper sequence boundary of DS2 is SB2. The upper sequence boundary of DS3 is SB1 and ended under the Razak clastic formation. In central Fars only lower part of Asmari is deposited and upper part of this formation have been eroded and disappeared.

Cite this paper
Mahmoodabadi, R. (2014) Petrography, Sedimentary Environments and Sequence Stratigraphy of Asmari Formation in Central Fars, Zagros, SW (Iran). Open Journal of Geology, 4, 665-679. doi: 10.4236/ojg.2014.412050.
[1]   Motiei, H. (1993) Stratigraphy of Zagros. Treatise on the Geology of Iran, Geological Survey of Iran, No 1, 536 p.

[2]   Alavi, M. (1994) Tectonic of Zagros Orogenic Belt of Iran: New Data and Interpretations. Tectonophysics, 229, 211-238. http://dx.doi.org/10.1016/0040-1951(94)90030-2

[3]   Dunham, R.J. (1962) Classification of Carbonate Rocks According to their Depositional Texture. AAPG, M 1, 108-121.

[4]   Carozzi, A.V. (1989) Carbonate Rocks Depositional Model. Prentice Hall, Englewood Cliffs, 604 p.

[5]   Flügel, E. (2004) Microfacies of Carbonate Rocks, Analysis, Interpretation and Application. Springer, Berlin, 976 p.

[6]   Vail, P.R.F., Audemard, S.A.P.R., Bowman, D., Eisner, N. and Perezcruz, C. (1988) The Stratigraphic Signatures of Tectonics, Eustasy and Sedimentology—An Overview. In: Einsele, G., Ricken, W. and Seilasher, A., Eds., Cycles and Events in Stratigraphy, Springer-Verlag, Berlin, 617-659.

[7]   Van Wagoner, J.C., Posamentier, H.W., Mitchem, R.M., Vail, P.R., Sarg, J.F., Loutit, T.S. and Hardenbol, J. (1988) An Overview of the Fundamentals of Sequence Stratigraphy and Key Definitions. In: Wilgus, C. K., Hasting, B.S., Kendall, C.G.St.C., Posmentier, H., Ross, C.A. and Van Wagoner, J.C., Eds., Sea Level Changes: An Integrated Approach, SEPM Special Publication 42, Darlington, 39-45.

[8]   Nadjaf, M., Mahboubi, A., Moussavi-Harami, R. and Mirzaee Mahmoodabadi, R. (2004) Depositional History and Sequence Stratigraphy of Outcropping Tertiary Carbonates in the Jahrum and Asmari Formations, Shiraz Area (SW Iran). Journal of Petroleum Geology, 27, 179-190.

[9]   Emery, D. and Myers, K. (2005) Sequence Stratigraphy. Blackwell Science, Oxford, 297 p.

[10]   Schalger, W., Reijmer, J.J.G. and Droxler, A. (1994) Highstand Shedding of Carbonate Platforms. Journal of Sedimentary Research, 64, 270-281.

[11]   Zhang, X.Q., Lin, J.N., Li, G. and Ling, Q.X. (2006) Non-Marine Cretaceous-Paleogene Boundary Section at Datang of Nanxiong, Northern Guangdong. Journal of Stratigraphy, 30, 327-340. (In Chinese)

[12]   Adabi, M.H., Zohdi, A., Ghabeishavi, A. and Amiri-Bakhtiyar, H. (2008) Applications of Nummulitids and Other Larger Benthic Foraminifera in Depositional Environment and Sequence Stratigraphy: An Example from the Eocene Deposits in Zagros Basin, SW Iran. Facies, 54, 499-512.

[13]   Van Buchem, F.S.P., Pittet, B., Vtner, H., Geo Tsch, J., Man Souri, A.I., Billing, I.M., Droste, H.H.F., Oterdoom, W.H. and Van Steenwinkel, M. (2002) High-Resolution Sequence Stratigraphie Architeeture of Barremian/Aptiam Earbonate Systems in Northern Oman and the United Arab Emirates (Kharaib and Shuaib a Formation). GeoArabia, 7, 461-500.

[14]   Amirshahkarami, M., Vaziri-Moghaddam, H. and Taheri, A. (2007) Sedimentary Facies and Sequence Stratigraphy of Asmari Formation at Chaman-Bolbol, Zagros Basin, Iran. Journal of Asian Earth Sciences, 29, 947-959.

[15]   Amirshahkarami, M, Ghabishavi, A. and Rahmani, A. (2010) Biostratigraphy and Paleoenvironment of the Larger Benthic Foraminifera in Wells Sections of the Asmari Formation from the Rag-e-Safid Oil Field, Zagros Basin, Southwest Iran. Stratigraphy and Sedimentology Researches, 26, 63-84.

[16]   Mirzaee Mahmoodabadi, R. (2013) Depositional Environments and Sequence Stratigraphy of Paleocene—Eocene Sediments in Shiraz Area, Fars, Zagros, Iran. IAS (International Association of Sedimentology), Manchester.

[17]   Mirzaee Mahmoodabadi, R. (2013) Paleoecology and Quantitative Study of Bentonic and Pelanktonic Foraminifera of Pabdeh Formation Based on Sequence Stratigraphy Evidences in Shiraz, Fars, Zagros, Iran. IAS (International Association of Sedimentology), Manchester.

[18]   Mirzaee Mahmoodabadi, R. (2014) Sedimentary Environments and Correlative Sequence Stratigraphy of Upper Cretaceous— Paleogene Succession in Shiraz Area, Fars, SW IRAN. Open Journal of Geology, 4, 1-17. http://dx.doi.org/10.4236/ojg.2014.41001

[19]   Mirzaee Mahmoodabadi, R. (2014) Sequence Microbiostratigraphy of Jahrum and Asmari Formations in Shiraz Area, Zagros, Fars, SW, Iran. Open Journal of Geology, 4, 93-107.