Oligocene and Miocene Rock Beds in Mamlaha anticline, Chamchamal town, Sulaimani city- Kurdistan region/ Iraq


1 Soran O. A. Kharajiany, 2 Fouad M. Qader, 3 Salim H. Hakkari , 4 Hero G. Sharbazheri
School of Art- Ceramic Materials, University of Sulaimani, 2 School of Science- Geology, University of Sulaimani, 
School of Science- Geology, University of Sulaimani, 4 School of Science- Geology, University of Sulaimani




Abstract
Previously, the Oligocene rock beds in the Mamlaha anticline have neither mentioned nor
proved. There are some selected sections that detected during field surveys but did not verified
weather belong to Oligocene- Miocene ages or not. Through this research, it is proved that they are
composed of Oligocene and Miocene rock strata. They are well-known as excellent rock reservoirs
for hydrocarbon accumulation in Kurdistan region and Iraq as a whole.
Field survey and stratigraphic study with microfacies analysis showed that nearly 37 meter of the
rock units from Mamlaha anticline (Mamlaha, Khwelin and Pungala sections) are representing
these formations; Bajwan Formation (Middle Oligocene), Anah and Ibrahim formations (Late
Oligocene) ages, Serikagni, Euphrates and Dhiban formations (Early Miocene) and Jeribe
Formation (Middle Miocene) ages respectively.
The contact between Bajwan and Anah is unconformable; the Lower contact of Bajwan Formation
is not exposed in each of the section. Ibrahim Formation however not exposed as well beds of marly
limestone; it shows as pocket of marly limestone, but it sandwiched between Bajwan and Anah
formations and shows no clear boundary.
The upper contact of Anah Formation is separated from Euphrates Formation by 2 meters of green
marl which indicates abrupt change in the lithology. The upper contact of Euphrates shows
unconformity, while Dhiban Formation is unconformably underneath the marly sandy bituminous
limestone of Jeribe Formation; Jeribe Formation is also unconformably lies beneath the claystone of
Fatha Formation.

Keywords: Archias kirkukensis, Austrotrilina howchini,, Mamlaha, Oligocene- Miocene, Kirkuk
Group Formations, Chamchamal, Kurdistan Region.



References

[1] Abawi T.S. and Hani H. D., (2005): Paleoecology of the Lower Miocene Sequence in Jambur
well No.18 Northern Iraq. AL- Rafidain Journal of Science- Geology, Vol.16, No.2, PP 41-49.
[2] Al-Ameri, T. K. Zumberge, J. and Markarian Z. M., (2011): Hydrocarbons in the Middle
Miocene Jeribe Formation, Dyala, NE Iraq AAPG Annual Conference And Exhibition. Making
the Next Giant Leap in Geosciences, Houston, Texas, USA.
[3] Al-Banna N. Y., 2004: Lithostratigraphy and Microfacies Analysis of the Serikagni
Formation Type Section, in Bara Village, Sinjar Area, NW Iraq. Iraqi Jour. of Earth Science, Vol.
4, No. 2, pp. 23-30.
[4] Al-Banna N. Y. and Al-Mutwali M. M., 2005: Sedimentary Cycles and Microfacies Analysis
of Lower Miocene Formations in Sinjar and Sharafaddin Areas, NW Iraq. AL- Rafidain
Journal of Science- Geology, Vol.16, No.2. , Special Issue, pp.57-68.
[5] Al-Hashimi, H.A and Amer, R.M., (1985): Tertiary Microfacies of Iraq. Directorate General
for Geological and Mineral Investigation, Baghdad, 159 PL.
[6] Al-Qayim B. A., Fattah A. I., and Kharajiany S.O. A. , 2014: Microfacies and Sequence
Stratigraphy of the Oligocene-Miocene Sequence at Gwlan mountain, Kurdistan,
Iraq. Geoarabia conference, Manama, Bahrain.
[7] Ameen B. M., (2011): Hypogene Processes of the Gypsum Beds in Sangaw Sinkholes,
Kurdistan Region, NE-Iraq. Iraqi National Journal of Earth Sciences, Vol. 11, No. 2, pp. 51-64,
2011
[8] Baba sheckh, S. M. R., (2000): Hydrogeochemistry of caves and springs in Sangaw-
Chamchamal area in NE- Iraq. (Unpublished M.Sc Thesis), College of Science, Baghdad
University.
[9] Bellen, R.C Van. M., Dunnington. H.V., Wetyzel. R and Morton, D., (1959): Lexique
Stratigraphique, International. Asia, Iraq, Vol. 3, 333p.
[10] Brun, J. A.L, (1971): Some Tertiary Microfossils and Microfacies from Iraq. Entreprise DE
Recherches D’activities Pètrolières, ELF, direction Exploration Laborataire.
[11] El-Makhr K. S. and Abd A. M., (2011): Anticline axes displacement between Fatha and
Jeribe formations of structures in the south Hemreen area (Central Iraq) from seismic evidence.
Journal of university of Anbar for pure science: Vol.5:NO.2.
[12] Elliot G. F., (1957): Subterraniphyllum thomasi, Anew Tertiary Coralline Algae.
Paleontology, vol.1 part.1 pp 73-75. Ma’ala K. A. and Al-Kubaysi K. N., (2009): Stratigraphy of
Al-Jazira Area. Iraqi Bull. Geol. Min. Special Issue, No.3: Geology of Al-
Jazira Area p 49- 70.
[13] Ghafur A. A., (2012): Sedimentology and Reservoir Characteristics of the
Oligocene-Early Miocene Carbonates (Kirkuk group) of Southern Kurdistan. PH.D Thesis,
School of Earth and Ocean Sciences, Cardiff University.
[14] Google Earth, satellite images, tilted images, 2013.
[15] Jassim S.Z. and Goff, J.C., 2006: Geology of Iraq. Dolin, Prague and Moravian Museum,
Brno, 341pp.
[15] Karim K. H., Khanqa P. A., Ismail K. M., and Sissakian V. K., (2012): Facies Analysis of
the Oligocene Succession on The Sharwaldir Anticline, NE of Kalar Town, NE Iraq. Iraqi
Bulletin of Geology and Mining, Vol.8, No.2.
[16] Khanqa, P. A., Karim. S. A., Sissakian V. K., and Kareem K. H., (2009): Lithostratigraphic
study of a Late Oligocene – Lower Miocene succession, South of Sulaimanyah, NE Iraq.
Iraqi Bulletin of Geology and Mining Vol.5, No.2, p 41− 57.
[17] Kharajiany S. O. A., (2008): Sedimentary facies of Oligocene rock units in Ashdagh
mountain- Sangaw district- Kurdistan region-NE Iraq, Unpublished thesis, College of Science,
University of Sulaimani.114p.
[18] Kharajiany S. O. A., (2013): The Middle Oligocene Rock Strata (Tarjil Formation) in
Ashdagh Mountain, Sangaw District, Sulaimani Governorate, Kurdistan Region, NE Iraq. Journal
of Zankoy Sulaimani- Part A (JZS-A), Vol.15, NO.3, PP 119-132.
[19] Kharajiany S. O. A., (2014): Occurrence of Lower- Middle Miocene Rock Units
(Euphrates, Dhiban and Jeribe formations) In Ashdagh Mountain, Sangaw Area, Sulaimanyah
City, NE Iraq. Iraqi Bulletin of Geology and Mining Vol.10, No.1. pp 1-20.
[20] Sissakian et al 1996: Tectonic Map of Iraq, Printed and Published by State Company of
Geological Survey and Mining.