Application of Geomorphic Indices in Evaluating Active Neotectonic Activities in Bayeh Anticline; Eyvan-e Qarb, Ilam

Document Type : Research Paper

Authors

1 Department of Physical Geography/ Geomorphology, Faculty of Geography and Environmental Planning, University of Sistsn and Baluchestan. Zahedan. Iran.

2 . Ph.D in Geomorphology, Shahid Beheshti University, Tehran, Iran, Zsarbazi@ymail.com

10.22034/farhang.2023.169583

Abstract

The aim of this paper is to evaluate the active tectonics in Bayeh Anticline. In this study the influence of tectonic activities in the Bayeh Anticline was well demonstrated and analyzed using various relevant parameters of eight geomorphic indices such as: Ratio of Valley Floor Width to Valley Height (VF), Aspect Ratio (AR), Mountain front facet (FMF), Mountain front sinuosity (SMF), Fold Symmetry Index (FSI), Fold Front Sinuosity (FFS), Percentage dissected mountain fronts (FD), Percentage undissected escarpments (EU), topographic and geological maps, satellite imageries, digital elevation model (DEM 12.5m) data in a GIS platform, with several field works.
Results show that values of SMF index in Bayeh anticline is equal with 1.14. Vf is defined as the ratio of the width of the valley floor to its average height. The value of Vf is calculated for the main valleys that cross mountain fronts of the study area. The values of Vf index in Bayeh anticline is 0.40. Fold front sinuosity (FFS) index, used as a proxy for the age of the fold structures. The geomorphic indices can be useful for detecting tectonic reliefs formed even during late deformation stages in everywhere. The final relative results depicted a good understanding of the existing tectonic of the any area. The output of this work revealed the significance of using different datasets from various sources and their overlay in a GIS platform for assessing the relative tectonic activity in the Bayeh Anticline or elsewhere.

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