OJG  Vol.5 No.4 , April 2015
Facies Analysis and Depositional Environment of the Oligocene-Miocene Asmari Formation, Bandar Abbas Hinterland, Iran
Abstract: The Asmari Formation is a thick carbonate sequence of the Oligocene-Miocene in the Zagros Basin, southwest of Iran. This formation is located in Bandar Abbas and Coastal Fars regions on the following two sections: Anguro anticline (west-northwest of Bandar Abbas) and Gavbast anticline (southwest of Lar County). The Asmari Formation has diameters of 68 and 26 m in the Anguro and Gavbast sections, respectively. This formation is composed of limestone, dolomitic limestone and an altered form of marl. Based on the results of petrographic analyses, 7 facies were identified in the Anguro and Gavbast sections in the study region. The facies were deposited on the following 3 belts: tidal flat (MF 1 - 3), lagoon (MF 4 - 5) and open marine (MF 6, 7). According to evidence such as the gradual change of microfacies, the lack of main reef barriers, and the lack of slumping and sliding features, the Asmari Formation was formed in a marine environment of carbonate homoclinal ramp type. This environment is composed of the following two subenvironments: the inner ramp and the middle ramp. The comparison of the facies identified in the Anguro and Gavbast sections indicates that Gavbast section is mainly composed of lagoon facies. Moreover, the Anguro section demonstrates more facies diversity than Gavbast section.
Cite this paper: Hoseinzadeh, M. , Daneshian, J. , Moallemi, S. and Solgi, A. (2015) Facies Analysis and Depositional Environment of the Oligocene-Miocene Asmari Formation, Bandar Abbas Hinterland, Iran. Open Journal of Geology, 5, 175-187. doi: 10.4236/ojg.2015.54016.

[1]   Motiei, H. (1994) Geology of Iran: Stratigraphy of Zagros. Geological Survey of Iran Publication, Tehran, 583.

[2]   James, G.A. and Wynd, J.G. (1965) Stratigraphic Nomenclature of Iranian Oil Consortium Agreement Area. AAPG Bulletin, 49, 2182-2245.

[3]   Heydari, E., Hassanzadeh, J., Wade, W.J. and Ghazi, A.M. (2003) Permian-Triassic Boundary Interval in the Abadeh Section of Iran with Implications for Mass Extinction, Part 1—Sedimentology. Paleogeography, Paleoclimatology, Paleoecology, 193, 405-423.

[4]   Al-Husseini, M.I. (2000) Origin of the Arabian Plate Structures: Amar Collision and Najd Rift. Geo Arabia, 5, 527-542.

[5]   Alavi, M. (2004) Regional Stratigraphy of the Zagros Fold-Thrust Belt of Iran and Its Proforel and Evolution. American Journal of Sciences, 304, 1-20.

[6]   Sherkati, S. and Letouzey, J. (2004) Variation of Structural Style and Basin Evolution in the Central Zagros (Izeh Zone and Dezful Embayment), Iran. Marine and Petroleum Geology, 21, 535-554.

[7]   Bahroudi, A. and Koyi, H.A. (2004) Tectono-Sedimentary Framework of the Gachsaran Formation in the Zagros Foreland Basin. Marine and Petroleum Geology, 21, 1295-1310.

[8]   Sahraeyan, M. and Bahrami, M. (2012) Petrography and Provenance of Sandstones from the Aghajari Formation, Folded Zagros Zone, Southwestern Iran. International Journal of Basic and Applied Sciences, 1, 283-298.

[9]   Berberian, M. and King, G.C.P. (1981) Towards a Paleogeography and Tectonic Evolution of Iran. Canadian Journal of Earth Sciences, 18, 210-265.

[10]   Berberian, M. (1995) Master “Blind” Thrust Faults Hidden under the Zagros Folds: Active Basement Tectonics and Surface Morphotectonics. Tectonophysics, 241, 193-224.

[11]   Beydoun, Z.R., Hughes Clarke, M.W. and Stoneley, R. (1992) Petroleum in the Zagros Basin: A Late Tertiary Foreland Basin Overprinted onto the Outer Edge of a Vast Hydrocarbon-Rich Paleozoic-Mesozoic Passive Margin Shelf. In: Macqueen, R.W. and Leckie, D.A., Eds., Foreland Basins and Fold Belts, Vol. 55, AAPG Memoir, Tulsa, 309-339.

[12]   Stoneley, R. (1981) The Geology of the Kuh-e Dalneshin Area of Southern Iran, and Its Bearing on the Evolution of Southern Tethys. Journal of the Geological Society, 138, 509-526.

[13]   Babaei, A., Babaie, H.A. and Arvin, M. (2005) Tectonic Evolution of the Neyrizophiolite, Iran: An Accretionary Prism Model. Ofioliti, 30, 65-74.

[14]   Babaie, H.A., Babaei, A., Ghazi, A.M. and Arvin, M. (2006) Geochemical, 40Ar/39Ar Age, and Isotopic Data for Crustal Rocks of the Neyriz ophiolite, Iran. Canadian Journal of Earth Sciences, 43, 57-70.

[15]   Babaie, H.A., Ghazi, A.M., Babaei, A., La Tour, T.E. and Hassanipak, A.A. (2001) Geochemistry of Arc Volcanic Rocks of the Zagros Crust Zone, Neyriz, Iran. Journal of Asian Earth Sciences, 19, 61-76.

[16]   Sepehr, M. and Cosgrove, J.W. (2004) Structural Framework of the Zagros Fold-Thrust Belt, Iran. Marine and Petroleum Geology, 21, 829-843.

[17]   Lacombe, O., Mouthereau, F., Kargar, S. and Meyer, B. (2006) Late Cenozoic and Modern Stress Fields in the Western Fars (Iran): Implications for the Tectonic and Kinematic Evolution of Central Zagros. Tectonics, 25, TC1003.

[18]   Mobasher, K. and Babaie, H.A. (2008) Kinematic Significance of Fold- and Fault-Related Fracture Systems in the Zagros Mountains, Southern Iran. Tectonophysics, 451, 156-169.

[19]   Dickson, J.A.D. (1965) A Modified Staining Technique for Carbonate in Thin Section. Nature, 205, 587.

[20]   Dunham, R.J. (1962) Classification of Carbonate Rocks According to Depositional Texture. American Association of Petroleum Geologist Memoirs, 1, 108-121.

[21]   Flugel, E. (2010) Microfacies of Carbonate Rocks: Analysis, Interpretation and Application. 2nd Edition, Springer-Verlag, Berlin, New York.

[22]   Buxton, M.W.N. and Pedley, H.M. (1989) A Standardized Model for Tethyan Tertiary Carbonates Ramps. Journal of the Geological Society, 146, 746-748.

[23]   Busk, H.G. and Mayo, H.T. (1918) Some Notes on the Geology of the Persian Oilfields. Journal of the Institute of Petroleum Technology, 5, 5-26.

[24]   Richardson, R.K. (1924) The Geology and Oil Measures of Southwest Persia. Journal of the Institute of Petroleum Technology, 1, 256-283.

[25]   Thomas, N.A. (1948) The Asmari Limestone of Southwest Iran. National Iranian Oil Company, Report 706, Unpublished.

[26]   Seyrafian, A., Vaziri-Moghaddam, H. and Torabi, H. (1996) Biostratigraphy of the Asmari Formation, Burujen Area, Iran. Journal of Sciences, 7, 31-48.

[27]   Seyrafian, A. (2000) Microfacies and Depositional Environments of the Asmari Formation, at Dehdez Area (a Correlation across Central Zagros Basin). Carbonates and Evaporites, 15, 121-129.

[28]   Seyrafian, A. and Mojikhalifeh, A. (2005) Biostratigraphy of the Late Paleogene-Early Neogene Succession, North- Central Border of Persian Gulf, Iran. Carbonates and Evaporites, 20, 91-97.

[29]   Vaziri-Moghaddam, H., Kimiagari, M. and Taheri, A. (2006) Depositional Environment and Sequence Stratigraphy of the Oligocene-Miocene Asmari Formation in SW Iran, Lali Area. Facies, 52, 41-51.

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

[31]   Hakimzadeh, S. and Seyra?an, A. (2008) Late Oligocene-Early Miocene Benthic Foraminifera and Biostratigraphy of the Asmari Formation, South Yasuj, North-Central Zagros Basin, Iran. Carbonates and Evaporites, 23, 1-10.

[32]   Ehrenberg, S.N., Pickard, N.A.H., Laursen, G.V., Monibi, S., Mossadegh, Z.K., Svana, T.A., Aqrawi, A.A.M., McArthur, J.M. and Thirlwall, M.F. (2007) Strontium Isotope Stratigraphy of the Asmari Formation (Oligocene-Lower Miocene), SW Iran. Journal of Petroleum Geology, 30, 107-128.

[33]   Laursen, G.V., Monibi, S., Allan, T.L., Pickard, N.A., Hosseiney, A., Vincent, B., Hamon, Y., Van-Buchem, F.S.P., Moallemi, A. and Druillion, G. (2009) The Asmari Formation Revisited: Changed Stratigraphic Allocation and New Biozonation. First International Petroleum Conference & Exhibition, European Association of Geoscientists and Engineers, Shiraz.

[34]   Mossadegh, Z.K., Haig, D.W., Allan, T., Adabi, M.H. and Sadeghi, A. (2009) Salinity Changes during Late Oligocene to Early Miocene Asmari Formation Deposition, Zagros Mountains, Iran. Palaeogeography, Palaeoclimatology, Palaeoecology, 272, 17-36.

[35]   Wynd, T. (1965) Biofacies of Iranian Oil Consortium Agreement Area. Iranian Oil Offshore Company, Report 1082.

[36]   Adams, C.G. and Bourgeois, E. (1967) Asmari Biostratigraphy: Geological and Exploration Division. Iranian Oil Offshore Company, Report 1074.

[37]   Tucker, M.E. and Wright, V.P. (1990) Carbonate Sedimentology. Blackwell Scientific Publications, Oxford.

[38]   Lee, J.J. (1990) Fine Structure of the Rhodophycean Porphyridium purpureum in Situ in Peneroplis pertusus (Forskal) and P. acicularis (Batsch) and in Axenic Culture. The Journal of Foraminiferal Research, 20, 162-169.

[39]   Allahkarampour Dill, M., Seyrafian, A. and Vaziri-Moghaddam, H. (2010) The Asmari Formation, North of the Gachsaran (Dill Anticline), SW Iran: Facies Analysis, Depositional Environment and Sequence Stratigraphy. Carbonates and Evaporites, 25, 145-160.

[40]   Romero, J., Caus, E. and Rossel, J. (2002) A Model for the Palaeoenvironmental Distribution of Larger Foraminifera Based on Late Middle Eocene Deposits on the Margin of the South Pyrenean Basin (NE Spain). Palaeogeography, Palaeoclimatology, Palaeoecology, 179, 43-56.

[41]   Corda, L. and Brandano, M. (2003) Aphotic Zone Carbonate Production on a Miocene Ramp, Central Apennines, Italy. Sedimentary Geology, 161, 55-70.

[42]   Vaziri-Moghaddam, H., Seyrafian, A., Taheri, A. and Motiei, H. (2010) Oligocene-Miocene Ramp System (Asmari Formation) in the NW of the Zagros Basin, Iran: Microfacies, Paleoenvironmental and Depositional Sequence. Revista Mexicana de Ciencias Geológicas, 27, 56-71.

[43]   Racey, A. (2001) A Review of Eocene Nummulites Accumulations: Structure, Formation and Reservoir Potential. Journal of Petroleum Geology, 24, 79-100.

[44]   Brandano, M. and Corda, L. (2002) Nutrients, Sea Level and Tectonics: Constrains for the Facies Architecture of a Miocene Carbonate Ramp in Central Italy. Terra Nova, 14, 257-262.

[45]   Pomar, L. (2001) Types of Carbonate Platforms: A Genetic Approach. Basin Research, 13, 313-334.

[46]   Kimiagari, M. (2006) Biostratigraphy, Microfacies and Sequence Stratigraphy of the Asmari Formation in the Gurpi Anticline (Lali Area) to Khaviz Mountain (Behbahan Area). Ph.D. Thesis, Isfahan University, Isfahan, 220. (In Persian)

[47]   Ghobeishavi, A. (2004) Sequence Stratigraphy of the Asmari Formation in the Khaviz Outcrop and Gachsaran Field. MSc. Thesis, Tabriz University, Tabriz.

[48]   Moallemi, S.A. (2010) Depositional Environment and the Effect of Diagenetic Processes on Reservoir Characterization of the Jahrum-Asmari Formation in East of Qatar-Kazerun Fault (West of Interior Fars). Ph.D. Thesis, Shahid Beheshti University, Tehran, 400.

[49]   Yazdani, R., Vaziri-Moghaddam, H., Seirafiyan, A. and Amiri Bakhtiar, H. (2007) Biostratigraphy and Depositional Environment of the Asmari Formation in the Well No. 30 of Aghajari Field. Journal of Stratigraphy and Sedimentology Researches, 25, 49-62.

[50]   Pedley, M. (1996) Miocene Reef Facies of the Pelagian Region (Central Mediterranean Region). In: Franseen, E.K., Esteben, M., Ward, W.C. and Rouchy, J.M., Eds., Models for Carbonate Stratigraphy from Miocene Reef Complexes of Mediterranean Regions: SEPM Concept Sediment Paleontology, Vol. 5, 247-259.