Investigating the role of tectonics in the development of Leylia - Keynow karstic aquifer (northeast of Khuzestan) with an emphasis on hydro-tectonical analysis


Department of Geology, Faculty of Earth Sciences, Shahid Chamran University of Ahvaz, Ahvaz, Iran


The calcareous terrain of Ilam-Sarvak Formation at Leylia-Keynow Anticlines in the northeast of Khuzestan province has formed a very rich karst aquifer under the influence of geological structures. Many dolines at the heights of these anticlines, and also karstic springs such as Sousan spring with super-high discharge, springs of Tange-Sard and Dare-kool with a relatively high discharge indicate that the regional karst is well developed. Studies of geological structures show that the study area is affected by the basement faults of the Izeh and Balaroud shear zones. As a result, in addition to the development of fractures, the anticlines of the area have been merged with each other through structural interferences. The aquifer (anticline) of the Leylia-Keynow is the result of the same structural development, which, based on water budget estimation, can also be linked to the adjacent aquifers (or anticlines). The fault structure of another important in the study area is Mafaroun thrust fault which has played a substantial role on occurrence of above springs by placing the Ilam-Sarvak Formation in front of the Pabdeh-Gurpi impenetrable Formation, as well as creating high fracturing. Field surveys also show that faults and fractures are more frequent in the study area. These types of fractures and faults play a key role in controlling the pattern of general flow and water transfer. In sum, these results indicate that the karstic aquifer in the study area is controlled by a specific hydrotectonic regime.


Aghanabati, A., 2006. The geology of Iran. Geological Survy and mineral exploration of Iran Publication, p. 586 (in Persian).
Ashjari, J., Raeisi, E., 2006. Anticline structure influences on regional flow, Zagros, Iran. Journal of Cave and Karst Studies 68 (3), 119-127.
Charchi, A., Kalantari, N., Keshavarzi, M.R., 2010. Assessment of Ovid karstic aquifer, SE Khouzestan. Researchs in Earth Sciences 1, 84-96 (in Persian with English abstract).
Chihi, H., De Marsily, G., Belayouni, H., Yahyaoui, H., 2015. Relationship between tectonic structures and hydrogeochemical compartmentalization in aquifers: Example of the “Jeffara de Medenine” system, south–east Tunisia. Journal of Hydrology: Regional Studies 4, 410-430.
Darvishzadeh, A., 2004. The Geology of Iran, Amirkabir Publications, p. 434 (in Persian).
Ghafari, H., 2011. Effects of tectonic structers in the development of karstic springs of Shirn-Bahar area. M.Sc Thesis, Shahid Chamran University of Ahvaz.
Gremaud, V., Goldscheider, N., Savoy, L., Favre, G., Masson, H., 2009. Geological structure, recharge processes and underground drainage of a glacierised karst aquifer system, Tsanfleuron-Sanetsch, Swiss Alps. Hydrogeology Journal 17, 1833–1848.
Herold, T., Jordan, P., Zwahlen, F., 2000. The influence of tectonic structures on karst flow patterns in karstified limestones and aquitards in the Jura Mountains, Switzerland. Eclogae Geologicae Helvetiae 93(3), 349-362.
Karimi Vardanjani, H., 2016. Investigation of hydrochemical features in Keynow anticline; Emphasize on isotope characteristics of water resources. Ph.D Thesis, Shahid Chamran University of Ahvaz. 
Mohammadibehzad, H.R., 2016. Investigation of charge sources of karst aquifers in northeastern Khouzestan province; using physico-chemical parameters and stable isotopes. Ph.D Thesis, Shahid Chamran University of Ahvaz.   
Mohammadibehzad, H.R., Charchi, A., Kalantari, N., 2015. Investigation of hydrogeological behavior of Sabzab karst spring, northeast of Khouzestan Province. Advanced Applied Geology 15, 10-19 (in Persian with English abstract).
Mohammadibehzad, H.R., Kalantari, N., Biglari, B., Torabi, K., 2016. Investigation of the source of salinity of Zohreh River downstream of Chamshir-dam and its capability for agricultural use. Advanced Applied Geology 21, 73-84 (in Persian with English abstract).
Motiei, H., 1995. Petroleum Geology of Zagros, Geological Survey of Iran Publication, p. 1009 (in Persian).
Price, N., Cosgrove, J., 1990. Analysis of Geological Structures.‎‏ ‏Cambridge University ‎Press, Cambridge.‎
Rubio, J. C., Simon, J. L., Soriano, M. A., 2007. Interacting tectonics, hydrogeology and karst processes in an intramonate basin: the Jilocagraben (NE Spain), Hydrogeology Journal 15, 1565-1576.
Sahebdel, M., 2009. Hydrochemical assessment of karst in Shirin-Bahar area. M.Sc Thesis, Shahid Chamran University of Ahvaz.
Vardanjani, H.K., Chitsazan, M., Ford, D., Karimi, H., Charchi, A., 2018. Initial assessment of recharge areas for large karst springs: A case study from the central Zagros Mountains, Iran. Hydrogeology Journal 26(1), 57-70.