Active Deformation Analysis in the Dehdasht Structural Basin Based on Geomorphic Features

Document Type : Original Research Articles

Authors
Kobra Heydarzadeh 1
Hossein Hajialibeigi 2
Gholamreza Gharabeigli 3
Jaume Verges 4
1 Department of Sedimentary Basins and Petroleum, Facaulty of Earth Sciences, Shahid Beheshti University
2 Department of Sedimentary Basins and Petroleum, Facaulty of Earth Sciences,Shahid Beheshti University
3 National Iranian Oil Company, exploration directorate, Tehran
4 Earth Science instute of Jaume Almera, Barcelona, Spain
10.22059/jsciences.2020.293046.1007465
Abstract
The Dehdasht Structural Basin, at the boundary of the southern Dezful Embayment and the Izeh Zone, is bordered by large anticlines with Cretaceous to Oligo-Miocene outcrops above hidden basement faults. The drainage system within the Dehdasht Structural Basin and the surrounding is considerably influenced by growth of the Gachsaran diapiric anticlines and salt extrusions and of the boundary anticlines. The Bangestan anticline in the NW of the basin uplifted 655 m since the Maroon River was diverted. Comparing the uplifts recorded in the topography of the large anticlines which are related to the Mountain Front Fault, to their structural amplitudes shows that the Khaviz anticline on the southern Dehdasht Structural Basin has more recent activity than the Bangestan and the Kuh-e-Siah anticlines. Variations of the local base levels along these anticlines with regards to their recent uplift values suggest 30 to 45% contribution of the  thrust faults on their forelimb in the active deformation of the structures bounding the Dehdasht Structural Basin.
Keywords
Dehdasht Structural Basin
Local base level variations
Active deformation
Maroon River
Central Zagros
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Journal of Sciences, Islamic Republic of Iran
Volume 32, Issue 1
Winter 2021
Pages 63-80