Geomorphic Signatures of Active tectonics in the Kashafrood drainage basin, NE Iran

Sajadian, Mohamad Reza; Ghorashi, Manouchehr; Javadi Mosavi, Elahe; Pourkermani, Mohsen; Arian, Mehran

Document Type : Original Research Paper

Authors

¹ Student, North Tehran Branch, Islamic Azad University, Tehran, Iran

² Associate Professor, Faculty of Basic Sciences, Islamic Azad University, Tehran North Branch; Geological Survey of Iran, Tehran, Iran.

³ Ph.D. Student, Science and Research Branch, Islamic Azad University, Tehran, Iran

⁴ Professor, North Tehran Branch, Islamic Azad University, Tehran, Iran

⁵ Professor, Science and Research Branch, Islamic Azad University Tehran, Iran

Abstract

Geomorphic indices of active tectonics are useful tools to analyze the influence of active tectonics. These indices have the advantage of being calculate from ArcGIS and remote sensing packages over large area as a reconnaissance tool to identify geomorphic anomalies possibly related to active tectonics. This is particularly valuable in west-central Alborz where relatively little work on active tectonics based on this method was done, so this method is new and useful. Based upon values of the stream length-gradient index (SL), drainage basin asymmetry (Af), hypsometric integral (Hi), ratio of valley-floor width to valley height (Vf), index of drainage basin shape (Bs), index of mountain front sinuosity (Smf) and transverse topographic symmetry factor (T), we used an overall index (Iat) that is a combination of the other indices. The low class of Iat are mainly in the sub-basins no; 6, 10,13,14,21,22,23,24,28 and the rest of the study area has moderate tectonic activities in the other sub-basins. Our results show that he moderate value has located along faulted area, which shows 2 class of relative tectonic activity.

Keywords

Main Subjects

Tectonics

References

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Scientific Quarterly Journal of Geosciences

Geomorphic Signatures of Active tectonics in the Kashafrood drainage basin, NE Iran

References

References

Volume 28, Issue 110
December 2018
Pages 299-306

Geomorphic Signatures of Active tectonics in the Kashafrood drainage basin, NE Iran

References

References

Volume 28, Issue 110December 2018Pages 299-306

Volume 28, Issue 110
December 2018
Pages 299-306