بررسی نهشته های کرتاسه پایینی در حوضه رسوبی کپه داغ غربی در شمال اقلیم تتیس (برش آق بند) با استفاده از نانوفسیل های آهکی

نویسندگان

1 استادیار دانشکده زمین‌شناسی، دانشکدگان علوم، دانشگاه تهران، تهران، ایران

2 کارشناس‌ارشد زمین‌شناسی، دانشکدگان علوم، دانشگاه تهران، تهران، ایران

3 استاد دانشکده زمین‌شناسی، دانشکدگان علوم، دانشگاه تهران، تهران، ایران

چکیده

نهشته­های رسوبی کرتاسه پایینی در بخش بالایی سازند سرچشمه و سازند سنگانه در غرب حوضه کپه­­داغ غربی در شمال گنبد­کاووس، برش آق­بند انتخاب و برای مطالعه نانوفسیل­های آهکی آن مورد مطالعه قرار گرفت. تعداد53 نمونه از 138 متر ضخامت آهک­های آرژیلیتی و شیل و مارن­های خاکستری روشن تا تیره نهشته­های کرتاسه پایینی برداشت شد. در این مطالعه تعداد 60 گونه نانوفسیلی از 25 جنس و 6 خانواده تشخیص داده شد. بر طبق زیست­زون­های حوضه تتیس، بخش­های بالایی زیست­زون NC5 (E, D) تا NC9A و بر اساس زیست چینه­نگاری استاندارد، بخش­های بالایی زیست­زون CC6 تا CC8b تشخیص داده شد و سن نسبی بارمین پسین تا آلبین میانی-پسین؟ برای رسوبات مورد مطالعه، پیشنهاد شد. این مطالعات نشان داد که سطح تراز نسبی آب­های اقیانوس تتیس در حوضه کپه­داغ، با توجه به سنگ­شناسی آن، مشابه با دیگر نقاط دنیا در بارمین و آپتین افزایش و در آلبین کاهش داشته ­است. مارن­های خاکستری تا زرد سازند آقچه­گیل با سن نئوژن بر روی مارن­های خاکستری تیره سازند سنگانه در برش مورد مطالعه قرار دارند و بیانگر یک ناپیوستگی از آلبین پسین تا نئوژن در برش مورد مطالعه می­باشند. مجموعه فسیلی موجود و حضور گونه­های آب گرم نظیر Rhagodiscus asper،Ragodiscus gallagheri، Rhagodiscus angustus،Rhagodiscus achylostaurion و Tranolithus orionatus نشان دهنده نهشته شدن این واحدهای رسوبی در عرض­های جغرافیایی پایین تا متوسط در این ناحیه از تتیس در حوضه کپه­داغ غربی است.

کلیدواژه‌ها

عنوان مقاله [English]

Investigation of the Lower Cretaceous strata by Calcareous Nannofossils at the western Koppeh-Dagh Basin in the North of Tethyan province (Agh-Band Section)

نویسندگان [English]

  • F. Foroughi 1
  • E. Lesan-Khosh Nik-Khoy 2
  • E. Ghasemi-Nejad 3
1 Assist. Prof., School of Geology, College of Science, University of Tehran, Tehran, Iran
2 M. Sc. of Geology, College of Science, University of Tehran, Tehran, Iran
3 Prof., School of Geology, College of Science, University of Tehran, Tehran, Iran
چکیده [English]

The Lower Cretaceous strata, upper Sarcheshmeh, and lower Sanghaneh formations in the western Koppeh-Dagh Basin, North of Gonbad-Kavoos, Aghband section were selected and studied based on calcareous nannofossils. A total of 53 samples of dark gray shale, marlstones, and argillaceous limestones of these rock units of 138 meters thick were collected. The sixty calcareous nannofossil species belonging to 25 genera and 6 families were identified. According to the biozones of the Tethyan schemes, the NC5 (E, D) to NC9B biozones, and according to the global standard schemes, the CC6 to CC8 biozones were recognized. Based on the biozones detected in the uppermost Sarcheshmeh and Sanganeh formations, the late Barremian to Middle-late Albian? age was proposed for the studied strata. These studies showed that the sea level of the Tethys Ocean (Koppeh-Dagh mountains) increased, similar to other parts of the world in the Barremian and Aptian, and the global sea level of the oceans decreased in the Albian ages. Also, the gray to yellow marlstone of the Agche-Gil Formation with Neogene age has stayed on the Sanganeh Formation and shows a hiatus from the late Albian to Neogene in the studied section. The assemblages of warm water species such as Rhagodiscus asper, Ragodiscus gallagheri, Rhagodiscus angustus, Rhagodiscus achylostaurion, and Tranolithus orionatus indicate these strata has located in the low to middle latitudes of the Tethyan province in the Koppeh-Dagh Basin.

کلیدواژه‌ها [English]

  • Late Barremian to middle- late Albian?
  • Aghband section
  • Lower Cretaceous
  • Calcareous nannofossils

مراجع

Aghanabati, A (2004) Geology of Iran. Geological Survey of Iran, 574 p. (in Persian).
Afshar-Harb, A (1973) Geology of Iran. Publications of the Organization of Geology and Mineral Explorations of the country, 212 p. (in Persian).
Foroughi, F., Lesan Khosh Nik-Khoy, Ghasemi-Nejad, E (2019) Biostratigraphy of the Sanganeh Formation based on calcareous nannofossils in the Western Kopeh-Dagh Basin, Aghband section. The 13th Symposium Paleontological Society Isfahan University, 28 & 29 Bahman, 2019. (in Persian).
Foroughi, F., Lasan-Khosh Nik-khoy, A., Babaei, S., Ghasemi-Nejad, E (2022) Comparative biostratigraphy based on calcareous and palynomorph nannoplanktons. in the Sanganeh formation, the western Kopeh-Dagh basin of the Aghband section, North of Gonbade-Kavus. The 40th National Geosciences Congress. (in Persian).
Bown, P. R (1998). Calcareous nannofossil biostratigraphy, British Micropalaeontological Society Publication Series. Chapman & Hall, 315 p.
Bralower, T. J (1987). Valanginian to Aptian calcareous nannofossil stratigraphy and correlation with the upper M-sequence magnetic anomalies. Journal of Marine Micropaleontology, 11: 293-310.
Bralower, T. J., Sliter, W. V., Arthur, M. A., Leckie, R. M., Allard, D., Schlanger, S. O (1993) Dysoxic/anoxic episodes in the Aptian-Albian (Early Cretaceous). Journal of Geophysical Monograph, 77: 5-37.
Erba, E (1992) Calcareous nannofossil distribution in pelagic rhythmic sediments (Aptian-Albian Piobbico core, Central Italy). Journal of Rivista Italiana Paleontology and Stratigraphy, 97: 695-704.
Do Monte Guerra, R., Monte Guerra, D., Fauth, G (2010) Upper Campanian calcareous nannofossils from a core of Well 2-RSS-1, Pelotas basin, Brazil. Journal of Revista Brasileira de Paleontologia, 13(3): 181-188, doi:10.4072/rbp.2010.3.03.
Ghasemi-Nejad, E., Shokri, N., Ashouri, A (2015) Palynostratigraphy of the Sanganeh Formation at the East and Central Kopeh-Dagh Basin based on dinoflagellate cysts. Journal of Stratigraphy and Sedimentary Researches, 1-12. (in Persian) doi: 20.1001.1.20087888.1394.31.1.1.5.
Gholami-Fard, A., Lotfali Kani, Mahani-pour, A (2016) Biostratigraphy of Sarcheshmeh and Sanganeh formations in the Qhale-Zu section (northwest of Shirvan) based on calcareous nannofossils. Journal of Earth Sciences, 25 (100): 199-208. (in Persian).
Gholami-Fard, A., Lotfali Kani, Mahani-pour, A., Foroughi, F., Jamali, A (2017a) Investigation of nannofossil biozones of Sarcheshmeh and Sanganeh formations in the Yazdan-Abad section compared to the Qhale-Zu section (Kopeh-Dagh Basin). Journal of Oil and Gas Exploration and Production: 27-32. (in Persian).
Gholami-Fard, A., Lotfali Kani, A., Mahani-pour, A (2017b) Calcareous nannofossil biostratigraphy of Sarcheshmeh and Sanganeh formations at Qaleh Jegh and Yazdan Abad sections (West of Kopet-Dagh Basin). Journal of Stratigraphy and Sedimentary Researches, 33 (1): 69-84. (in Persian), doi: 10.22108/JSSR.2017.21136.
Hadavi, F., Bodaghi, F (2018) Nanostratigraphy of the Sanganeh Formation in Mozduran section (Kopeh-Dagh). Journal of Sedimentary Facies, 1. (in Persian).
Haq, B. U (2014) Cretaceous eustasy revisited (Review paper). Journal of Global and Planetary Change, 113: 44-58.
Herrle, J. O., Pross, J., Friedrich, O., Kopler, P., Hemleben, C (2003) Forcing mechanisms for mid-Cretaceous black shale formation: evidence from the Upper Aptian and Lower Albian of the Vocontian Basin (SE France). Journal of Paleogeography, Paleoclimatology, Paleoecology, 190: 399- 426.
Linnert, C., Mutterlose, J (2009) Evidence of increasing surface water oligotrophy during the Campanian–Maastrichtian boundary interval: Calcareous nannofossils from DSDP Hole 390A (Blake Nose), 79: 113-133.
Lasan-Khosh Nik-Khoy, A. and Foroughi, F (2023) Calcareous nannofossils Biostratigraphy of the Early Cretaceous deposits in the Koppeh-Dagh Basin, North-Eastern Tethyan province, NE Iran. The 3rd International Conference on Engineering and Applied Natural Sciences is on 14-17 January 2023 at Konya/Turkey.
Mahanipour, A., Mutterlose, J., Kani, A. L. and Adabi, M. H (2011) Biostratigraphy of early Cretaceous (Aptian) calcareous nannofossils and the δ13 C carb isotope record from NE Iran. Journal of Cretaceous Research, 32: 331-356.
Mahanipour, A., Lotfali Kani, A., Raisossadat, N (2012) Nanostratigraphy of Sarcheshmeh and Sanganeh formations in the western part of the Kopeh-Dagh region (Takal-kooh section). Journal of Geoscience, 20 (79): 94-83 (in Persian).
Mahanipour, A., Lotfali Kani, A (2016) Biostratigraphy of calcareous nannofossils of Sarcheshmeh and Sanganeh formations in the west of Kopeh-Dagh basin, Shaikh stratigraphic section. Journal of Stratigraphy and Sedimentology Researches, (1) 31. (in Persian).
Maqsoodlou, M (2014) Investigating the sedimentation conditions of Agche Gil Formation and its impact on the economic potential of the north of Gonbade-Kavus. Master's thesis, Shahrood Azad University. (in Persian).
Manivit, H., Perch-Nielsen, K., Prins, B., Verbeek, J. W (1977) Mid Cretaceous calcareous nannofossil biostratigraphy. Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen, B80: 169-181.
Perch-Nielsen, K (1985). Mesozoic Calcareous Nannofossil. In: Bolli, H.M., Saunders, J.B., and Perch-Nielsen, K. (Eds.); Plankton stratigraphy, Cambridge Earth Science Series, Cambridge University Press: 329-426, 92 figs.
Raisossadat, N., Mahboubi, A (2000) Investigation of stable isotopes of carbon and oxygen in Sarcheshmeh and Sanganeh formations in the west of Koppeh-Dagh basin. Journal of Sedimentary Facies, 3 (2): 88-98 (in Persian).
Raisossadat, N (2009) Biozonation of Upper Barremian-Lower Albian strata based on Ammonites in the eastern Koppeh-Dagh basin, NE Iran. Journal of Sciences of Tehran University, 4: 87-96 (in Persian).
Roth, P. H (1978) Cretaceous nannoplankton biostratigraphy and oceanography of the northwestern Atlantic Ocean, In: Benson, W. E., Sheridan, R. E., (Eds.), Initial Reports of Deep-Sea Drilling Project, 44: 731–759.
Roth, P. H., Krumbech, K., R (1986) Middle Cretaceous calcareous nannofossil biostratigraphy and preservation in the Atlantic and Indian Oceans: Implications for paleoceanography. Marine Micropaleontology, 10: 235-266.
Roth, P. H. and Thierstein, H (1972) Calcareous nannoplankton: Leg 14 of the Deep-Sea Drilling Project. Initial Reports of the DSDP, 14: 421-485.
Roth, P. H., Medd, A. W., Watkins, D. K (1983) Jurassic calcareous nannofossil zonation, a review with new evidence from Deep Sea Drilling Project Site 534 A. Initial Report of Deep-Sea Drilling Project, 76: 573-579.
Sissingh, W (1977) Biostratigraphy of Cretaceous Calcareous Nannoplankton, Geologie Mijnbouw, 56: 37-49.
Sharifi, M., Foroughi, F., Ghasemi-Nejad, E., Shekarifard, A., Yazdi-Moghadam, M., Sarfi, M (2019) Integrated Biostratigraphy, Depositional Setting and Geochemical Analyses for Petroleum Potential Evaluation of the Lower Cretaceous (Barremian–Albian) Strata of the Koppeh-Dagh Basin, Northeastern Iran. Journal of Acta Geologica scinica, 93: 1885-1899. doi:10.1111/1755-6724.13823.
Shokri, M., Raisossadat, N., Mutterlose, J (2006) Calcareous nannofossils of Sarcheshmeh and Sanganeh formations in Takkel-Kuh section in the northwest of Kopeh-Dagh, Basin. 10th Conference of Geological Society of Iran, Tarbiat Modares University. (in Persian).
Shokri, M (2015) Biostratigraphy of Sarcheshmeh Formation based on calcareous nannoplankton in Ateshgan and Amirabad section (Kopeh-Dagh Mountain Range). The 10th Conference of Geological Society of Iran, 10: 219 (in Persian).
Stöcklin, J., Setudehnia, A (1991) Stratigraphy Lexicon of Iran. Geological Survey of Iran, 18: 376 p.

Thibault, N., Husson, H., Harlou, R., Gardin, S., Galbrun, B., Huret, H, Minoletti, F (2012) Astronomical calibration of upper Campanian–Maastrichtian carbon isotope events and calcareous plankton biostratigraphy in the Indian Ocean (ODP Hole 762C): Implication for the age of the Campanian–Maastrichtian boundary. Journal of Palaeogeography, Palaeoclimatology, Palaeoecology, 337 (338): 52-71.

Thierstein, H. R (1971) Tentative Lower Cretaceous calcareous nannoplankton zonation, Eclogae Geologicae Helvetiae, 64: 459-488.

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  • تاریخ دریافت: 13 تیر 1402
  • تاریخ بازنگری: 13 آبان 1402
  • تاریخ پذیرش: 23 آبان 1402

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