ریزرخساره‌ها، محیط رسوبی و چینه‌نگاری سکانسی سازند آسماری در یال جنوبی تاقدیس کوه سیاه، شمال دهدشت، زاگرس

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه زمین‌شناسی، دانشکده علوم پایه، دانشگاه اصفهان، اصفهان

2 دانشکده علوم زمین، دانشگاه صنعتی شاهرود، شاهرود

3 معاونت زمین‌شناسی، شرکت ملی مناطق نفت خیز جنوب، شرکت ملی نفت ایران، اهواز

چکیده

سازند آسماری در حوضه زاگرس طی الیگوسن-میوسن نهشته شده است. در این پژوهش جهت بررسی ریزرخساره­ها، محیط رسوبی و چینه­نگاری سکانسی این سازند در یال جنوبی تاقدیس کوه سیاه، (شمال دهدشت) 127 نمونه مورد مطالعه قرار گرفته است. سازند آسماری در برش مورد مطالعه 214 متر ضخامت داشته و متشکل از آهک­های ضخیم، متوسط تا نازک لایه با میان لایه­هایی از آهک مارنی، آهک دولومیتی و مارن می­باشد. مطالعات پتروگرافی و آنالیز ریزرخساره­ای حاکی از آن است که کربنات­های سازند آسماری متشکل از 11 ریزرخساره در قالب چهار کمربند ریزرخساره­ای دریای باز، سد، تالاب و پهنه جزرومدی در یک پلاتفرم کربناته رمپ نهشته شده است. بر طبق الگوهای عمیق و کم عمق شدگی ریزرخساره­ها یک بسته رسوبی فرازین به سن شاتین، سه سکانس درجه سه به سن آکیتانین و یک سکانس درجه سه به سن بوردیگالین تشخیص داده شده است.

کلیدواژه‌ها


عنوان مقاله [English]

Microfacies, depositional environments and sequence stratigraphy of the Asmari Formation in Kuh-e Siah anticline north of Dehdasht, Zagros

نویسندگان [English]

  • Mojgan Zare 1
  • Hossain Vaziri-Moghaddam 1
  • Azizolah Taheri 2
  • Ali Ghabeishavi 3
چکیده [English]

The Asmari Formation deposited in the Zagros basin during the Oligocene-Miocene. In this study, microfacies, depositional environment and sequence stratigraphy of the Asmari Formation in Kooh-Siah anticline (north of Dehdasht) 127 sampels was studied. The thickness of the Asmari Formation in this section is 214m and consists of thick, medium and thin bedded limestones interbeded with marly limestone, dolomitic limestone and marl. Based on petrography and analysis of microfacies features,11 different microfacies types have been recognized,which can be grouped into 4 depositional environments:tidal flat, lagoon, shoal and open marine. The Asmari Formation represents sedimentation on a carbonate ramp. A HST in Chattian, three third-order depositional sequence in Aquitanian, and one third-order sequence in Burdigalian are recognized,on the basis of deepening and shallowing patterns in the microfacies.

کلیدواژه‌ها [English]

  • Oligocene-Miocene
  • Sequence Stratigraphy
  • Carbonate ramp
  • microfacies
  • Asmari Formation
منابع
[1]   رحمانی، ع (1390) چینه­شناسی سازند آسماری در تاقدیس­های بنگستان و خویز و میدان نفتی پارسی، رساله­ی دکتری چینه­شناسی و فسیل­شناسی، دانشگاه اصفهان، 210ص.
[2]   کلنات، ب.، وزیری­مقدم، ح.، طاهری، ع (1389) زیست چینه نگاری و پالئواکولوژی سازند آسماری در جنوب غرب فیروز آباد. ریزرخساره­های رسوبی، جلد 3، صفحه71-84.
[3]   مطیعی، ه (1372) زمین­شناسی ایران، چینه­شناسی زاگرس. انتشارات سازمان زمین­شناسی کشور، 536 ص.
[4]   مؤسسه­ی جغرافیایی، کارتوگرافی گیتاشناسی (1384) اطلس راه­های ایران، مقیاس 1:100000.
[5]  Adams, T.D., Bourgeois, F (1967) Asmari biostratigraphy, Geological and Exploration, Iranian Offshore Oil Company Report. no. 1074, (unpublished).
[6]  Aguilera-Franco, N., Hernández-Romano, U (2004) Cenomanian-Turonianfacies succession in the Guerrero-Morelos Basin, Southern Mexico, Sedimentary Geology,v. 170 p. 135-162.
[7]  Allahkarampour Dill, M., Seyrafian, A. and Vaziri-Moghaddam, H (2010) The Asmari Formation, north of the Gachsaran (Dill anticline), southwest Iran:faciesanalysis, depositional environments and sequence stratigraphy, Carbonates and Evaporites.v. 25 p. 145–160.
[8]  Allahkarampour Dill, M., Seyrafian, A. and Vaziri-Moghaddam, H (2012) Palaeoecology of the Oligocene-Miocene Asmari Formation in the Dill Anticline, Zagros Basin, Iran, Neues. Jahrbuch für geology und paläontologie. V. 263 p. 167-184.
[9]  Amirshahkarami, M., Vaziri-Moghaddam, H. and Taheri, A (2007) Sedimentary faciesandSequencestratigeraphy of the Asmari Formation at the Chaman-Bolbol, Zagros Basin, Iran, Journalof Asian Earth Science.v. 29p. 947-959.
[10]   Amirshahkarami, M., Ghabishavi, A. and Rahmani, A (2010) Biostratigraphy and Paleoenvironment of the larger benthic foraminifera in wells section of the Asmari Formation from Rag-e-Safid oil fild,Zagros Basin, southwest Iran, Stratigraphy and Sedimentology Researches.v. 40p. 63-84.
[11]   Barattolo, F., Bassi, D. and Romero, R (2007) Upper Eocen larger foraminiferal-coralline algal facies from the Klokova Mountain, south continental Greece. Facies, 53, 361-375.
[12]   Beavington-Penney, S.J. and Racey, A (2004) Ecology of extant nummulitids and other larger benthic foraminifera, applications in palaeoenvironmental analysis. Earth-Science Reviews, 67, 219-265.
[13]   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.v. 14p. 257-262.
[14]   Burchette, T.P. Wright, V.P(1992) Carbonate ramp depositional systems, Sedimentary Geology.v. 79p. 3-57.
[15]   Buxton, M.W.N., Pedley, H.M (1989) A standardized model for Thethyan Tertiary carbonate ramps, London, Journal of the Geological Society.v. 146p. 746-748.
[16]   Catuneanu, O., Abreu, V. Bhattacharya, J.P. Blum, M.D. Dalrymple, R.W. Eriksson, P.G. Fielding, C.R. Fisher, W.L. Galloway, W.E. Gibling, M.R. Giles, K.A. Holbrook, J.M. Jordan, R. Kendall, C.G.S.C. Macurda, B. Martinsen, O.J. Miall, A.D. Neal, J.E. Nummedal, D. Pomar, L. Posamentier, H.W. Pratt, B.R. Sarg, J.F. Shanley, K.W. Steel, R.J. Strasser, A. Tucker, M.E. and Winker, C (2009) Towards the standardization of sequence stratigraphy, Earth-Science Reviews.v. 92p. 1-33.
[17]   Catuneanu, O., Bhattacharya, J.P. Blum, M.D. Dalrymple, R.W. Eriksson, P.G. Fielding, C.R. Fisher, W.L. Galloway, W.E. Gianolla, P. Gibling, M.R. Giles, K.A. Holbrook, J.M. Jordan, R. Kendall, C.G.S.C. Macurda, B. Martinsen, O.J. Miall, A.D. Neal, J.E. Nummedal, D. Pomar, L. Posamentier, H.W. Pratt, B.R. Shanley, K.W. Steel, R.J. Strasser, A. and Tucker, M.E (2010) Sequence stratigraphy: common ground after three decades of development, Stratigraphy.v. 28 p. 21-33.
[18]   Corda, L., Brandana, M (2003) Aphotic zone carbonate production on a Miocene ramp, Central Apennines, Italy, Sedimentary Geology.v. 161 p. 55-70.
[19]   Cosovic, V., Drobne, K. and Moro, A (2004) Paleoenvironmental model for Eocene foraminiferallimestones of the Adriatic carbonate platform, Istrian Peninsula, Facies.v. 50 p. 61-75.
[20]   Dunham, R.J (1962) Classification of carbonate rocks according to their depositional texture, AAPG Memoir.v. 1p. 108-121.
[21]   Ehrenberg, S.N., Pickard, N.A.H., Laursen, G.V., Monibi, S., Mossadegh, Z.K., Svana,T.A., Agrawi, A.A.M., McArthur, J.M. and Thirlwall, M.F (2007) Strontium isotope stratigraphy of theAsmari Formation (Oligocene – Lower Miocene), SW Iran, Journal of Petroleum Geology.v. 30 p. 107-128.
[22]   Embry, A.F. and Klovan, J.E (1971) A Late Devonian reef tract on Northeastern Banks Island, NWT Canadian Petroleum Geology Bulletin. v.19 p. 730-781.
[23]   Flugel, E (2010) Microfacies Analysis of Carbonate Rocks, Interpretation and application, Springer-Verlag, Berlin, 976p.
[24]   Geel, T (2000) Recognition of stratigraphic sequence in carbonate platform and slope deposits, empirical models based on microfacies analysis Palaeogene deposits in southeastern Spain, Palaeogeography.p.211-238.
[25]   Hallock, P., Glenn, E.C (1986) Larger foraminifera: A tool for paleoenvironmental analysis of Cenozoic depositional facies, Palaios.v. 1 p. 55– 64.
[26]   Hardie, L.A (1986) Ancient carbonate tidal flate deposits, Quarterly Journal of the Colorado School of Mines. v. 81 p. 37-57.
[27]   Hernández-Romano, U (1999) Facies stratigraphy and diagenesis of the Cenomanian-Turonian of the Guerrero-Morelos platform, southern Mexico, United Kingdom, University of Reading, Postgraduate Research Institute for Sedimentology, Ph.D, Thesis, 322p.
[28]   Hottinger, L (1997) Shallow bentihic foraminiferal assembelages as signals for depth of their deposition and their limitations, Geology France.v. 168 p. 491–505.
[29]   James, G.A. Wynd, J.G (1965) Stratigraphic nomenclature of Iranian Oil Consortium Agreement Area, AAPG Bulletin.v. 49 p. 2182-2245.
[30]   Lasemi, Y (1995) Platform carbonates of the Upper Jurassic Mozduran Formation in the KopehDagh Basin, NE Iran-facies, palaeoenvironments and sequences, Sedimentary Geology. v. 99 p. 151-164.
[31]   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.v. 272 p.17-36.
[32]   Nebelsick, J.H., Rasswe, M. and Bassi, D (2005) Facies dynamic in Eocene to Oligocene Circumalpine carbonates, Facies. v. 51 p. 197–216.
[33]   Pomar, L (2001a) Types of carbonate platforms: a genetic approach, Basin Research. v.13 p. 313-334.
[34]   Pomar, L (2001b) Ecological control of sedimentary accommodation, evolution from a carbonate ramp to rimmed shelf, Upper Miocene, Balearic Islands, Palaeogeography, Palaeoclimatology, Palaeoecology. v. 175 p. 249-272.
[35]   Rahmani, A., Vaziri-Moghaddam, H., Taheri, A. and Ghabeishavi, A (2009) A model for the paleoenvironmetal distribution of larger foraminifera of Oligocene-Miocene carbonate rocks at Khaviz Anticline, Zagros Basin, SW Iran, Historical Biology. V. 21 p. 215-227.
[36]   Rasser, M., Scheibner, C. and Mutti, M (2005) A paleoenvironmental standard section for Early Ilerdian tropical carbonate factories, (Corbieres, France; Pyrenees, Spain): Facies. v. 51 p. 218-232.
[37]   37-Reiss, Z. Hottinger, L (1948) The Gulf of Aqaba: ecological micropaleontology, Springer, Berlin Heidelberg New York, 345p.
[38]   Sadeghi R., Vaziri-Moghaddam, H. and Taheri, A(2010) Microfacies and sedimentary environment of the Oligocene sequence (Asmari Formation) in Fars sub-basin, Zagros Mountains, southwest Iran, Springer-Verlag. v. 57 p. 431-446.
[39]   Steinhauff, D.M., and Walker, K.R (1996) Sequence stratigraphy of an apparently non-cyclic carbonate succession: recognizing subaerial exposure in largely subtidal, Middle Ordovician stratigraphic sequence in eastern Tennessee, in Witzka, G.A., Ludvingson, J.E., Day, B.J. (eds.), Paleozoic Sequence Stratigraphy, Views from the North American Craton, Geological Society of America, Special Paper. v. 306 p. 87-115.
[40]   Taheri, A., Vaziri-Moghaddam, H. and Seyrafian, A (2008) Relationships between foraminiferal assemblages and depositional sequences in Jahrum Formation, Ardal area (Zagros Basin, SW Iran), Historycal biology. V. 20 p. 191-201.
[41]   Thomas, A.N (1948) The Asmari limestone of southwest Iran. National Iranian Oil Company, Report 706, unpublished.
[42]   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., Vedrenne, V. and 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. v. 329 p. 219-263.
[43]   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. v. 52 p. 41-51.
[44]   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, paleoenvironment and depositional sequence, Revista Mexicana de CienciasGeológicas. v. 27 p. 56-71.
[45]   Wilson, J.L (1975) Carbonate facies in geological history, New York, Springer-Verlag, 471p.