Quantitative assessment of relative tectonic activity in the Alamarvdasht river basin, south of Iran

Document Type : Scientific and Research

Authors

1 Associate Professor, Kharazmi University, Tehran, Iran

2 Professor, University of Tehran, Tehran, Iran

3 Ph.D. Candidate in Physical Geography, Kharazmi University, Tehran, Iran

Abstract

Tectonic processes are major factors controlling landform development in tectonically active areas. In order to evaluate quantitative measurement of tectonic activities in the Alamarvdasht basin in the south of Iran, six different morphological indices including stream-gradient index (SL), drainage basin asymmetry (Af), hypsometric integral (Hi), valley floor width-valley height ratio (Vf), drainage basin shape (Bs) and mountain-front sinuosity (Smf) were calculated. These indices were combined to generate the relative active tectonics index (IAT) and the study area was divided into three classes: high, moderate and low relative tectonic activity based on IAT values. The results of IAT index showed that high and moderate tectonic activity areas are located near the main faults and anticlines. The results are also consistent with geology and field observations on landforms and GPS data of Lamerd geodynamics station. GPS data shows subsidence and north-eastern movement in the basin because of convergence between the Arabian and Eurasian plates in the Zagros Mountains zone.

Keywords

References

  1. Arian, M., Aram, Z. (2014). Relative tectonic activity classification in Kermanshah area, west Iran. Solid Earth Discuss, 6: 2097–2141. doi:10.5194/sed-6-2097-2014.
  2. Bahrami, S. (2013). Analyzing the drainage system anomaly of Zagros basins: Implications for active tectonics. Tectonophysics 608: 914-928. doi:10.1016/j.tecto.2013.07.026.
  3. Bahrami, S. (2012). Morphotectonic evolution of triangular facets and wine-glass valleys in the Noakoh anticline, Zagros, Iran: Implications for active tectonics. Geomorphology, 159-160: 37-49. doi:10.1016/j.geomorph.2012.03.003.
  4. Baioni, D. (2007). Drainage basin asymmetry and erosion processes relationship through a new representation of two geomorphic indices in the Conca river (northern Apennines). Ital J Geosci, 126(3): 573-579.
  5. Blanc, E., Allen, M.B., Inger, S., Hassani, H. (2003). Structural styles in the Zagros simple folded zone, Iran. J Geol Soc Lond, 160: 401-412.
  6. Bull, W.B., McFadden, L.D. (1997). Tectonic geomorphology north and south of the Garlock fault, California, In: Doehring. D.C. (Ed.), Geomorphology in Arid Regions, Proceeding 8th Annual Geomorphology Symposium, State University of New York, Binghamton, NY: 115-137.
  7. Bull, W., B. (2007). Tectonic geomorphology of mountains: a new approach to paleoseismology. Blackwell, Malden.
  8. Cooley, S.W. (2015). GIS4Geomorphology: http://www.gis4geomorphology.com. Accessed December 25.
  9. Dehbozorgi, M., Pourkermani, M., Arian, M., Matkan, A., Motamedi, H., Hosseiniasl, A. (2010). Quantitative analysis of relative tectonic activity in the Sarvestan area, central Zagros, Iran.  Geomorphology, 21(3-4): 329-341. doi:10.1016/j.geomorph.2010.05.002.
  10. Ehsani, J., Arian, M. (2015). Quantitative analysis of relative tectonic activity in the Jarahi- Hendijan basin area, Zagros, Iran. Geosciences Journal. doi:10.1007/s12303-015-0016-3.
  11. El. Hamdouni, R., Irigaray, C., Fernandez, T., Chacón, J., Keller, E. (2007). Assessment of relative active tectonics, southwest border of Sierra Nevada (southern Spain). Geomorphology 96: 150–173. doi:10.1016/j.geomorph.2007.08.004.
  12. Habibi, A., Gharibreza, M. (2015). Estimation of the relative active tectonics in Shahriary basin (Central Iran) using geomorphic and seismicity indices. Natural Environment Change, 1(1): 71-83.
  13. Hack, J.T. (1982). Physiographic division and differential uplift in the piedmont and Blue Ridge. U.S. Geological Survey Professional Paper, 1265: 1-49.
  14. Hack, J.T. (1973). Stream-profiles analysis and stream-gradient index. Journal of Research of the U.S. Geological Survey, 1(4): 421-429.
  15. Hack, J.T. (1957). Studies of longitudinal stream-profiles in Virginia and Maryland: U.S. Geological Survey Professional Paper (294B): 45-97.
  16. Hare, P.W., Gardner, T.W. (1985). Geomorphic indicators of vertical neotectonism along converging plate margins, Nicoya Peninsula, Costa Rica. In: Morisawa M, Hack JT (Eds.) Tectonic Geomorphology. Proceedings of the 15th Annual Binghamton Geomorphology Symposium. Allen and Unwin, Boston,123-134.
  17. Keller, E.A., Pinter, N. (2002). Active Tectonics: Earthquakes, Uplift, and Landscape (2nd Ed.). Prentice Hall, New Jersey.
  18. Keller, E.A., Pinter, N. (1996). Active Tectonics: Earthquakes, Uplift, and Landscape. Prentice Hall, New Jersey.
  19. Khavari, R., Ghorashi, M., Arian, M., Khosrotehrani, K. (2010). Geomorphic signatures of active tectonics in the Karaj drainage basin in South Central Alborz, N Iran. Geosciences, Iranian Geological Survey, 19(75): 67-74.
  20. Mosavi, E.J., Arian, M. (2015). Tectonic Geomorphology of Atrak River, NE Iran. Open Journal of Geology, 5: 106-114.
  21. Mosavi, E.J., Arian, M., Ghorshi, M., Nazemi, M. (2015). Neotectonics of Tabas Area, Central Iran by Index of Active Tectonics (IAT). Open Journal of Geology, 5: 209-223.
  22. National Cartographic Center of Iran, 2015. GPS data of Lamerd geodynamics station, south of Fars province, Iran.
  23. Omidali, M., Arian, M., Sorbi, A. (2015). Neotectonics of Boroujerd Area, SW Iran by Index of Active Tectonics. Open Journal of Geology, 5: 309-324.
  24. Ramsey, L., Walker, R., Jackson, J. (2008). Fold evolution and drainage development in the agros mountains of Fars province, SE Iran. Basin Research. doi:10.1111/j.1365-2117.2007.00342.x.
  25. Rezaei Moghaddam, M.H., Kheirizadeh, M. (2015). Evaluation of Neotectonic Activities Using Quantitative Geomorphic Indices (Case Study: Eastern Alborz in North of Semnan Province). Arid Regions Geographic Studies, 5(18): 19-36.
  26. Talebian, M., Jackson, J. (2004). A reappraisal of earthquake focal mechanisms and active shortening in the Zagros mountains of Iran. Geophys. J. Int., 156: 506-526.
  27. Tatar, M., Hatzfeld, D., Martinod, J., Walpersdorf, A., Ghafori-Ashtiany, M., Chery, J. (2002). The present day deformation of the central Zagros from GPS measurements, Geophys, Res. Lett., 29: 19-27.
Natural Environment Change
Volume 2, Issue 2
July 2016
Pages 99-110

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