NDLI: Tectonic geomorphology of High Zagros Ranges, SW Iran: an initiative towards seismic hazard assessment

Content Provider	Springer Nature Link
Author	Faghih, Ali Esmaeilzadeh Soudejani, Akbar Nourbakhsh, Ahmad Rokni, Sara
Copyright Year	2015
Abstract	The High Zagros Ranges, SW Iran is considered to be tectonically active where damaging earthquakes have occurred. These ranges were uplifted by approximately 4550 m with respect to sea level following the collision between the Afro-Arabian and Central-Iranian plates. The Plio-Quaternary active tectonics was assessed through a detailed quantitative geomorphological study of fault-generated mountain fronts and alluvial/fluvial systems of the High Zagros Ranges. Quantitative measurement of geomorphological indices such as the 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) and field data suggests a relatively medium to high degree of tectonic activity along the High Zagros Ranges. The obtained results from these indices were combined to yield an index of active tectonics (Iat). The indicative values of this index are consistent with the landforms and geology of the study area. The Iat is low to moderate in northern part of the study area which corresponds to the inactive Main Zagros Reverse Fault. The high values of Iat mainly occur in southern parts of the study area where straight mountain fronts and triangular facets along the Dena Fault suggest high tectonic activity. Moreover, the data plotted for earthquakes occurrences are consistent with morphotectonic map of relative tectonic activity and can be used as an initiative towards seismic hazard assessment. Most of the major faults are considered to be active and have potential to generate large earthquake in future and need to be evaluated more carefully for the regional seismic hazard.
Starting Page	3007
Ending Page	3017
Page Count	11
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	74
Issue Number	4
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-03-28
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Geomorphological indices Active tectonics Earthquake Zagros Iran Geology Hydrology/Water Resources Geochemistry Environmental Science and Engineering Terrestrial Pollution Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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