jzs-10746

Chronicle of the Oligocene succession (Kirkuk Group) in Duhok Governorate, Kurdistan Region, North Iraq

Kamal Haji Karim1 and Briar Ahmad Hama1
1 Department of Geology, college of Science, University of Sulaimani

Original: 3 March 2019 
Revised: 22 April 2019
Accepted: 21 May 2019
Published online: 20 June 2019


Abstract

The previous studies referred to the Duhok area as a terrestrial uplift during Oligocene while the present study achieved completely different result by recording and mapping about 20-30 meters thick succession of the Oligocene Rocks (Kirkuk Group) for first time. The succession extends for about 20 kilometers inside the High Folded Zone and the previous basin boundary of Oligocene shifted to north for more than 50 kilometers. The succession consists of lagoonal limestone and changes in certain places, in the north, to patchy reef. Few beds of polymictic and limestone conglomerates intervened the succession in different levels. The Middle and Upper Oligocene index fossils are common, the most significant ones are Archias hensoni, Austrotrillina howchini, Praerhapydionina delicata, Peneroplis evolutus, Archias asmariensis, Archias kirkukensis and spirolina austrica. The main facies are coral and red algae bounstone, foraminifera and intraclast packstone to grainstone, pelecypod gastropod bioclast packstone to grainstone. The paleogeography setting (model) of the Oligocene is discussed in detail, compared with previous model and new model is drawn.

Key Words: Duhok stratigraphy, Oligocene succession, Oligocene paleogeography, Oligocene tectonics.


    References

[1] Dunnington, H.V. "Generation, Migration, Accumulation, and Dissipation of Oil in Northern Iraq". In: Morris A.E.L. (Editor), Arabian Gulf: Geology and Productivity, AAPG Florien Reprint Series, Vol. 2, pp. 62-119. (1958).

[2] Bellen, R. C., Dunnington, H. V., Wetzel, R. and Morton, D. "Lexique Stratigraphic International", Asie, Fasc., 10 a, Iraq, Paris, 333p. (1959).

[3] Buday, T. "Regional geology of Iraq, vol. 1, Stratigraphy", edited by  Kassab IM, Jassim SZ, GEOSURV. Baghdad, 432 p. (1980).

[4] Jassim, S.Z., and Goff, J.C. "Geology of Iraq", Dolin, Prague and Moravian Museum Brno, Czech Republic, 352p. (2006).

[5] Baba Shekh, S. M. R. "Hydrogeochemistry of some springs in Sangaw-Chamchamal area. Unpub". M. Sc. Thesis, University of Baghdad, 150p. (2006)

[6] Ameen, B.M. "Lithological indicator for the Oligocene unconformity in Iraq". Iraqi Bull. Geol. Min., Vol. 5, No. 1, pp. 25-34. (2009).

[7] Kharajiany, S. O. A. "Sedimentary facies of Oligocene rock units in Ashdagh mountain- Sangaw district- Kurdistan region-NE Iraq", Unpublished thesis, College of Science, University of Sulaimani.114p. (2008).

[8] Agha, M.T., Numan, N.M.S. and Ma’ala. "Field guide for the Geology Duhok and Sinjar area", Fifth Iraqi Geological Congress, Baghdad, 25p. (1978).

[9] Csontos. L., Sasvári, Á., Pocsai T, Kósa L, Salae, A. T. and  Ali, A. "Structural evolution of the northwestern Zagros, Kurdistan Region, Iraq", Implications on oil migration GeoArabia.Vol. 17, No. 2, pp. 81-116. (2012).

[10] Sissakian VK and Al-Jibouri B.S.M. "Stratigraphy of the Low Folded Zone Iraqi", Bull. Geol.Min. Vol. 5, pp. 63-132. (2012).

[11] Al-Hubaiti, S.T.M. "Tectonic Style Changes along Bekhair Anticline Axis-Northern Iraq", Unpublished M.Sc. thesis, University of Mosul (in Arabic), 131p. (2008).

[12] Al-Moadhen A. A. H. and Al-Obaidi, M. R. S. "Thrust fault tectonics in the Duhok Region (High Folded Zone, N. Iraq", International Journal of Civil Engineering and Technology (IJCIET), Vol. 6, No. 10, pp. 132-146. (2015).

[13] Karim, K. H., Yara, I. M., Kharajiany, S. O., Khanaqa, P. A., Sharbazheri, K. M., Baziany, M. M., Mohammad, Y. O., Mohammed, S. T. "Stratigraphy and Facies analysis of the Govanda Formation from western Zagros, Kurdistan Region, Northeastern Iraq", Iraqi National Journal of Earth Sciences. Vol. 18, No. 2, pp. 12-35. (2018).

[14] Baziany, M. M. Q. "Geology of bedded Gypsum in the Gercus Formation (Early-Middle Eocene) in Duhok area, Kurdistan Region, Northern Iraq", GERMENA III, Vol. 5, No. 11, pp. 1-17. (2009).

[15] Al-Azzawi, N. K. and  Al-Sumaidaie, M. A. H. "Structural and Tectonic Study of Brifka Anticline, Northern Iraq", Iraqi National Journal of Earth Sciences, Vol. 18, No. 1, pp. 29-58. (2018).

[16] Khanaqa, P.A, Sissakian V.S., Karim, K. H, Karim, S.A. "Lithostratigraphic study of a Late Oligocene-Early Miocene succession, south of Sulaimaniyah, NE-Iraq", Iraqi Bulletin of Geology and Mining. Vol. 5, No. 2, pp. 41-57. (2009).

[17] Ghafor, I.M., Karim, K.H. and Sissakian, V. "Biostratigraphy of Oligocene succession in the High Folded Zone, Sulaimani, Kurdistan Region, Northeastern Iraq", Arabian Journal of Geosciences. Vol. 7, No. 9, pp. 359–361. (2014).

[18] Kharajiany, S.O. "The Middle Oligocene Rock Strata (Tarjil Formation) in Ashdagh Mountain, Sangaw District, Sulaimani Governorate, Kurdistan Region, NE Iraq", Journal of Zankoy Sulaimani (JZS) Part A. Vol. 15, No. 3, pp. 119-132. (2013).

[19] Kharajiany, S. O. A., Qader, F. M., Hakkari, S. H., Sharbazheri H G. "Oligocene and Miocene Rock Beds in Mamlaha anticline, Chamchamal town, Sulaimani city- Kurdistan Region, Iraq", Journal of Zankoy Sulaimani (JZS), Part A. Vol. 16, No. 2, pp. 71-93. (2014).

[20] Karim, S.A,, Sissakian. V. K. and Al-Kubaysi, K. N. "Stratigraphy of the Oligocene –Early Miocene exposed formations in Sinjar area, NW Iraq", Iraqi Bulletin of Geology and Mining. Vol.  10, No. 3, pp. 1-28. (2014).

[21] Karim, K. H., Khanaqa, P.A., Ismail, K. I. and  Sissakian, V. "Facies analysis of the Oligocene succession on the Sharwaldir anticline, NE of the Kalar Town, NE-Iraq", Iraqi Bulletin of Geology and Mining, Vol. 8, No. 2, pp. 1-19. (2012).

[22] Al-Hashimi, H. A. J. and Amer, R.M. "Tertiary Microfacies of Iraq", GEOSURV, Baghdad, 56p. (1985).

[23] Numan, N. M. S., Hammoudi, R. A. and Chorowicz, J. "Synsedimentary tectonics in the Eocene Pila Spi limestone Formation in Iraq and its Geodynamic implications", J. Africa earth Sci. Vol. 27, No. 1, pp. 141-148. (1998).

[24] Karim, K. H, Fatagh, A. I., Azad Ibrahim, A. and Koyi, H. "Historical development of the present day lineaments of the Western Zagros Fold-Thrust Belt: A Case study from Northeastern Iraq, Kurdistan Region 2009", Iraqi Journal of Earth Sciences. Vol. 9, No. 1, pp. 55-70. (2009).

[25] Ibrahim, A.O. "Tectonic style and evolution of the NW segment of the Zagros Fold – Thrust Belt, Sulaimani Governorate, Kurdistan Region, NE Iraq", Unpublished Ph.D. Thesis, University of Sulaimani, College of Science, 187p. (2009).