References

Solid Earth

1869-9529

Copernicus Publications

Göttingen, Germany

10.5194/se-5-1277-2014

Relative tectonic activity classification in the Kermanshah area, western Iran

Arian

¹ Aram

Department of Geology, Science and Research Branch, Islamic Azad university, Tehran, Iran

Department of Geology, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran

04 12 2014

5 2 1277 1291

2014

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Due to the closing of the subduction zone and the collision of the Arabian and Eurasian plates, the High Zagros region has always been affected by a wide range of tectonic variations. In this research, the Gharasu River basin, which is located in the Kermanshah area, was selected as the study area, six geomorphic indices were calculated, and the results of each one were divided into three classes. Then, using the indices, relative tectonic activity was calculated, and their values were classified and analysed in four groups. Regions were identified as very high, high, moderate and low. In analysing the results and combining them with field observations and regional geology, the results were often associated and justified with field evidence. The highest value is located on the Dokeral anticline in the crush zone in Zagros. Most of the areas with high and moderate values of Index of Active Tectonics (IAT) are also located in the crush zone in Zagros. Crushing in this zone is because of the main fault mechanism of the Zagros region. The result in this paper confirms previous research in this region. At the eastern end of the study area, the value of Iat is high, which could be the result of the Sarab and Koh-e Sefid fault mechanisms.

References 1

Arian, M. and Hashemi, S. A.: Seismotectonic Zoning in the Zagros, J. Sci., 18, 63–74, 2008.

Braud, J.: Geological map of Kermanshah area, scale 1:250 000 Geologic Survey of Iran, 1979.

Bull, W. B.: Tectonic geomorphology of mountains: a new approach to paleoseismology, Blackwell, Malden, 2007.

Bull, W. B. and McFadden, L. D.: Tectonic geomorphology north and south of the Garlock fault, California, in: Geomorphology in Arid Regions, edited by: Doehring, D. O., Proceedings of the Eighth Annual Geomorphology Symposium, State University of New York, Binghamton, 115–138, 1977.

Cannon, P. J.: Generation of explicit parameters for a quantitative geomorphic study of Mill Creek drainage basin, Oklahoma Geology Notes, 1, 3–16, 1976.

Dehbozorgi, M., Pourkermani, M., Arian, M., Matkan, A. A., Motamedi, H., and Hosseiniasl, A.: Quantitative analysis of relative tectonic activity in the Sarvestan area, central Zagros , Iran. Geomorphol., 121, 329–341, 2010.

El Hamdouni, R., Irigaray, C., Fernandez, T., Chacon, J., and Keller, E. A.: Assessment of relative active tectonics, southwest border of Sierra Nevada (southern Spain), Geomorphology, 96, 150–173, 2008.

Hack, J. T.: Studies of longitudinal stream-profiles in Virginia and Maryland, US Geol. Surv. Profess. Paper, 294B, 45–97, 1957.

Hack J. T.: Stream-profiles analysis and stream-gradient index, J. Res. USA, Geol. Surv., 1, 421–429, 1973.

Hack, J. T.: Physiographic division and differential uplift in the piedmont and Blue Ridge, US Geol. Surv. Profess. Paper, 1265, 1–49, 1982.

Hare, P. W. and Gardner, T. W.: Geomorphic indicators of vertical neotectonism along converging plate margins, Nicoya Peninsula, Costa Rica, in: Tectonic Geomorphology, edited by: Morisawa, M. and Hack, J. T., Proceedings of the 15th Annual Binghamton Geomorphology Symposium, Allen and Unwin, Boston, 123–134, 1985.

Karimi, A. R.: Geological map of Kermanshah area, scale 1:100 000, Geologic Survey of Iran, 1999.

Keller, E. A.: Investigation of active tectonics: use of surficial Earth processes, in: Active tectonics, edited by: Wallace, R. E., Studies in Geophysics, National Academy press, Washington DC, 136–147, 1986.

Keller, E. A. and Pinter, N.: Active tectonics: Earthquakes, Uplift, and Landscape (2nd Edn.), Prentice Hall, New Jersey, 432, 2002.

Memarian, H.: Geology for engineers, Tehran University Press, 2001 (in Persian).

Mirzaei, N., Gao, M., and Chen, Y. T.: seismic source regionalization for seismic zoning of Iran: Major seismotectonic provinces, J. Earth. Predict. Res., 7, 465–495, 1998.

Molin, P., Pazzaglia, F. J., and Dramis, F.: Geomorphic expression of active tectonics in a rapidly-deforming forearc, sila massif, Calabria, southern Italy, Am. J. Sci., 304, 559–589, 2004.

Nazari, H.: Geological map of Harsin area scale 1:100 000, Geologic Survey of Iran, 1998.

Ramirez-Herrera, M. T.: Geomorphic assessment of active tectonics in the Acambay Graben, Mexican volcanic belt, Earth Surf. Proc. Land., 23, 317–332, 1998.

Rockwell, T. K., Keller, E. A., and Jonson, D. L.: Tectonic geomorphology of alluvial fans and mountain fronts near Ventura, California, in: Tectonic Geomorphology, edited by: Morisawa, M., Proceedings of the 15th Annual Geomorphology Symposium, Allen and Unwin Publishers, Boston, 183–207, 1985.

Sadeghian, M. and Delavar, S. T.: Geological map of Kamyaran area scale 1:100 000, Geologic Survey of Iran, 2007.

Silva, P. G.: Evolutiongeodinamica de la depression del Guadalentindesde el Miocene superior hasta la Actualidad: Neotectonic age omorfologia, Ph.D. Dissertation, Complutense University, Madrid, 1994.

Silva, P. G., Goy, J. L., Zazo, C., and Bardajm, T.: Fault generated mountain fronts in Southeast Spain: geomorphologic assessment of tectonic and earthquake activity, Geomorphology, 250, 203–226, 2003.

Strahler, A. N.: Hypsometric (area-altitude) analysis of erosional topography, Geol. Soc. Am. Bull., 63, 1117–1142, 1952.

Wells, S. G., Bullard, T. F., Menges, T. M., Drake, P. G., Karas, P. A., Kelson, K. I., Ritter, J. B., and Wesling, J. R.: Regional variations in tectonic geomorphology along segmented convergent plate boundary, Pacific coast of Costa Rica, Geomorphology, 1, 239–265, 1988.