Sequence Stratigraphy and Digenetic Processes of Asmari and Jahrom Formations in South-East of Shiraz (Tange Zanjiran)

Abstract

Asmari Formation in Tange-zanjiran section  reaches to 219 m in thick. It consists of gray massive limestones containing benthic foraminifera, cream thick limestones including bivalves and echinoid spines with intercalation of the thin marl. This formation covered upon Jahrom Formation and is gradually underlain by Razak Formation. In this section, The Jahrom Formation is 32m in thick and contains gray massive limestone with solution features by crushing. This formation covered Pabdeh Formation. About 126 samples were collected for studding microfacies, sequence stratigraphy and paleontology. The 15 microfasies from inner to outer ramp are recognised for the first time. The Asmari Formation is dated Early Oligocene (Rupelian – chatian)  - Early Miocene (Aqutanian) and Jahrum Formation is dated Late Eocene (Priabonian) on the basis of benthic foraminifera. The three sedimentary sequences (seq1-seq2-seq3) are distinguished on the basin of facies components, from base to top. They show two system tracts (TST and HST) with shallowing upward. The deepest sequence is related to maximum flooding surface (seq2). The diagenetic process consists of Micritization, Dolomitization, Compaction, Cementation, Hematitization, Neomorphism, Porosity, Fracturing, Bioturbation and Geopetal fabric.

Keywords

Main Subjects

References

-    آدابی، م. ح. (1383)، ژئوشیمی رسوبی، انتشارات آرین زمین، 476 صفحه.
-    رحیم پور بناب، ب. (1384)، سنگ‌شناسی کربناته، ارتباط دیاژنز و تکامل تخلخل، چاپ اول، انتشارات دانشگاه تهران، 324 صفحه.
 
-    مطیعی، ه. (1374)، زمین‌شناسی ایران، زمین‌شناسی زاگرس-1، چاپ اول، انتشارات سازمان زمین‌شناسی کشور ،1009   صفحه.
-      موسسه جغرافیایی و کارتوگرافی گیتاشناسی، (1384)، اطلس راه‌های ایران.
 
- Allahkarampour Dill M، Seyrafian A، Vaziri-Moghaddam H (2010) The Asmari Formation، north of the Gachsaran (Dill anticline)، southwest Iran: facies analysis، depositional environments and sequence stratigraphy. Carbonates Evaporites 25:145–160.
-Barattolo F، Bassi D، Romero R (2007) Upper Eocene larger foraminiferal- coralline algal facies from the Klokova Mountain (south continental Greece). Facies 53:361–375.
-Brandano، M.، 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.
-Busk، H. G.، & Mayo، H. T. (1919): Some notes on the geology of the Persian  oil fields. – J، Inst, Petrol. Tech.، no. 5، 5-26p.
-Buxton، M.W.N.، &  Pedley، H.M. (1989): Short paper: a standardized model for Tethyan Tertiary carbonate ramps، Journal of the Geological Society، 146: 746-748p.
-Choquette، P.W.، &  Pray، L.C. (1970): Geologic nomencalature and classification of porosity in sedimentary carbonate. Bull. Am.  Ass. Petrol. Geol.، 54:207-250p.
-Cosovic، V.، Drobne، K. & Moro، A. 2004، P   aleoenvironmental model for Eocene foraminiferallimestones of the Adriatic carbonate platform (Istrian Peninsula).Facies، 50: 61-75.
- Corda، L.، Brandano، M.، 2003. Aphotic zone carbonate production on a Miocene ramp، Central Apennines، Italy. Sedimentary Geology 161، 55-70.
-.Dunham. R. J. Classification of Carbonate rocks according to Dipositional  texture. In: W. E. Ham(ed) Classification of carbonate rock: A symposium. Amarican  Association Petroleum Geology  Memoir. 1. 108-121p.
- Embry، A.F.، & Klovan، E.J. (1972): Absolute wter limits of the Devonian paleocological zones: Geol، Rdshch، v.61.21-45
- Flugel، E. (2004) : Microfacies of carbonate rocks. Springer-Verlag، Berlin، 976 pp.
-  Flugel، E. (2010): Microfacies of carbonate rocks. Springer-Verlag، Berlin، 984 pp (Second edition).
- Folk، R.L، (1974a): Petrology of sedimentary rocks. Hemphill، Austin، Texas.، 159 pp.
- Gregg، J. M.، & Shelton، K. L. (1990): Dolomitization and dolomite neomorphism in the back reef facies of the Bonneterre and Davis Formations (Cambrian)، south­east Missouri: Journal of Sedimentary Petrology.، 60: 549-562p.
-James. G. A.، & J. G. Wynd، (1965): Stratigraphic nomenclature of Iranian oil consortium agreememt Area: Am. Assoc. Petrol. Geol.Bull.، v. 49. 2182- 2245p.
-Longman، B.W. (1984) : Pressure responses (deformation ) in carbonat sediments and rocks and analysis and application، In : Purcell، P.G، (ed)، The canning Basin، W. A. Proceeding of the Geological Society of western Australia – Petrolem Exploration society of Australia، 235-251p.
-Machel، H.G. (2005):In vestigations of burial diagenesis in carbonate hydrocarbon reservoir rocks Geoscince Canada، 32,103-128p.
-Scholle، P. A.، &  Ulmer-Scholle، D.S. (2003): A color Guide to the petrolgraphy of carbonate Rocks: Grains، textures، porosity، diagenesis، The American Association of petroleum Geologists Tulsa Pub.,459p.
-Tucker، M. E. (2001): Sedimntary Petrology، Blackwell scienc، oxford OX2. EL، UK، 262 P.
-Tucker، M. E .،  & Wright، V. P. (1990):  Carbonate rockes، A. A .P. G .Memoir.
 
              
 
 
 
 
 
 

Files

Share

How to cite

Statistics