Qara-Chattan Roacslide in Pira-Magroon Aticline, Northeastern Iraq

Kamal Haji Karim Ahmad, Ghafir Ameen Hamasur, & Sherzad Tofiq Mohamad

College of Science, University of Sulaimani


This paper deals with a rock failure from Pira-Magroon Mountain, Northeastern Iraq. Field study and graphical representation showed that this failure is a rockslide. Being located near Qara-Chattan village, we named this phenomenon as Qara-Chattan Rockslide. About 200 million tons of rock materials are slided from the elevation of 29000 meters above sea level to the elevation of 1000 meters. The slide rock debris now rested on a gently sloping plain near the village and forming a tongue like hill about 50 meters high. Many geomorphologic features and slide activating factors are also discussed as well as stereonet analysis of the rockslide.

1. Bellen, It C. Van, Dannigton, H. V., and Morton, D. M., Lexique Stratigraphic international, vol. 3, Asie, Paris, Interant, Geo. Cong. Comm.Stratig.,Pt, 1959,10a, p 333. 
2. Al-Fadhil, I., Janardan Rao, Y., Oweiss, G. and Khalil, M., Polyphase deformation in a part of Zagros, Sulaimanyi District, NE. Iraq; J. Indian. Academy of Geoscience, 1979. 22,1-31. 
3. Hamasur,G.A., The Quantitative Analysis of the Qara-Chattan Rock-Slide from Northeastern Iraq.The First Scientific Conference of Dohuk Unversity.J.Dohuk University,1999,2, 465476. 
4. Dennis,J.G.,Sructural Geology:An Introduction.Wm.C. Brown publishers. USA.1987, p 448. 
5. Bell, F.G., Engineering Geology and Gotechnics. Newnes-Butter worth, London. 1980 
6. Hoek, E, and Bray, J. W., Rock Slope Engineering (rd. ed.), Institution of Mining and Metallurgy, London, 1981, p 358. 
7. Blyth, F.G.H. and de Freitas,M.H., A Geology for Engineers (6th ed.). Edward Arnold, London,557Pramanik. 1974 
8.Railsback,L.B., Brook,G.A., Chen, J., Kalin, R. and Fleisher, C., Environmental control on the petrology of a Late Holocene speleothem from Botswana with annual layers of aragonite and calcite: Journal of Sedimentary Research, 1994, A64, 1. 
9. Turner,F.J.,and Weiss,L.E., Structural analysis of metamorphic tectonites .New York: McGraw- Hill. 1963 , p 545. 
10. Hoek, E., Influence of Rock Structure on Stability of Rock Slopes. In: C.O. Brawner and U. Milligan (eds.): Stability in open Pit Mining. Proc. 1st conf. On Stability in open Pit Mining. Van Cover, Canada. 1971a. pp. (49- 63). 
11. Hamasur, G. A., Engineering Geological Study of Rock Slope Stability in Haibat-Sultan Mountain. NE- Iraq, Unpub. M. Sc. Thesis, Univer. of Salahaddin 1991. (p.152) 
12. Al- Saadi, N., A method for mapping unstable slopes with reference to the coastline of S. W. Dyfed, Wales. Unpub. Ph. D. Thesis, University of Bristol, 1981, p. 252