Lithostratigraphy of Sarvak Formation in NW of Rashk Village (NW of Nurabad)

Abstract

Sarvak Formation is mainly composed of carbonate rocks. The Sarvak Formation located in northwest of the Rashk village (Nurabad city) to a thickness of 171 m. In order to identify lithostratigraphy, thickness, identification of microfacies and facies belts, determination of sedimentary environment and depositional model was studied.The Sarvak Formation in the studied area is composed of thin, medium and thick gray light  and cream limestones. In this study, 56 thin sections have been studied to verify lithostratigraphy of the Sarvak Formation. Lower boundary of the Sarvak Formation is gradually with Kazhdumi Formation and its upper boundary is discontinuous with Gurpi Formation. Based on the recognizing the 8 microfacies in the studied section of sedimentary environments of Sarvak Formation the ramp has been proposed.

Keywords

Main Subjects


-     افشارحرب، ع. (1380) ، زمین‌شناسی نفت ایران، جزوه آموزشی- دانشکده فنی، دانشگاه تهران، 140 صفحه.
-           خسروتهرانی، خ. (1386)، رخساره‌‌های میکروسکوپی، انتشارات دانشگاه تهران، 1386، جلد اول و دوم، 498، 292 صفحه.
-     خسرو تهرانی، خ. (1386)، چینه‌شناسی ایران، انتشارات دانشگاه تهران، شماره 1977، 582 صفحه.
 
- لاسمی، ی.؛ کاووسی، م. (1387). چینه‌نگاری سکانسی سارند سروک در جنوب‌خاور لرستان شمال ایذه، مجموعه مقالات نهمین انجمن زمین‌شناسی ایران، دانشگاه تربیت‌معلم تهران، صفحات 595 ـ 598 .
-     مطیعی، هـ. (1372)، زمین‌شناسی ایران، چینه‌شناسی زاگرس، انتشارات سازمان زمین‌شناسی، 892 صفحه.
 
- Alavi, M, (2004): Regional stratigraphy of the Zagros fold-thrust belt of Iran and its proforeland evolution, American Journal of Science, v.304, p-20 11.
- Berberian, M. & King, G.C.P (1981): Towards a paleogeography and tectonic evolution of Iran, Canadian Journal of Earth Sciences, Vol.18, No.2.
- Dunham, R. J, (1962): Classification of carbonate rocks according to depositional texture. In: W. E. Ham (ed.) Classification of carbonate rocks,a symposium. Am. Assoc. Petrol. Geol. Mem. 1, p. 108-121.
-  Embery, D., & Myers, K. J (1996): Sequence Stratigraphy. Blackwell, Oxford, 297p.
-  Flügel, E, (2004): Microfacies of Carbonate Rocks, Springer-Verlag, 976 p.
- James, G.a., & Wynd, J. G, (1965): Stratigraphic nomenclature or Iranain oil consortium, agreement area, American Association of Petroleum Geologists Bullten, v. 49, p. 2118-2245.
- Loeblich, A. & Tappan, H, (1988): Foraminiferal evolution diversification and extinction. Journal of paleontology, 62, 695-714
- Slinger, F.C.P. and Crichton, J.G. (1959), The geology and development of the Gachsara field, southwest Iran Proc. 5ifth World petroleum congeries, New York, p. 349-375.
- Wilson, J. L, (1975): Carbonate facies in geological history, springer-Verlag, New York, 471p.