Quantitative analysis of relative tectonic activity in the Jarahi-Hendijan basin area, Zagros, Iran

Abstract

Quantitative analysis is a major factor controlling landform development in tectonically active regions, and it has significantly affected fluvial systems and mountain-front landscapes in the Jarahi-Hendijan basin area of the Zagros, southwest Iran. The area is located along the high Zagros, Zagros simple folded belt and coastal plain. It is an outcome of the SE-NW oriented tectonic conversion that initiated in the Late Cretaceous and strengthened during the Early Miocene due to the collision of the Arabian and Eurasian plates. To assess tectonic activities in the area, we have analyzed geomorphic indices: 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). These indices were combined to yield the relative active tectonics index (Iat) using geographic information systems (GIS). Based on Iat values, the study area was divided into four parts: Class 1 (very high relative tectonic activity, 11.5% in area); Class 2 (high, 27.7%); Class 3 (moderate, 23.4%), and Class 4 (low, 37.4%). The results are consistent with field observations on landforms and the regions with high relative tectonic activity mostly correspond with the active mountain front faults at the northern part of study area. The coastal plain in the west and southwest of the area show the lowest relative tectonic activity (class 4).

Folding pattern in the Fars province, Zagros folded belt: case study on the Karbasi and Khaftar anticlines, interior Fars, Iran

“…Fold geometric form and mechanical stratigraphy evolution are affected by thickness, detachment unit's ductility, and stratigraphy sequence of formations. Moreover, fold geometric form and mechanical stratigraphy evolution depend on the above-mentioned cases (Ehsani and Arian, 2015;Arian and Aram, 2014;Qorashi and Arian, 2011;Alavi, 1994). Numerous studies have been conducted according to variation of structural style and effects of detachment folding on folding pattern (Sherkati& Letouzey, 2004;Sherkati et al, 2005).…”

The Relationship between Fe Mineralization and Magnetic Basement Faults using Multifractal Modeling in the Esfordi and Behabad Areas (BMD), Central Iran

“…In Table 1, the general physical properties ('susceptibilities') of the rock types in the study area are summarized based on Soheili and Mahdavi (1991) and Mahdavi (1996). The Relationship between surface structures (e.g., Khavari et al, 2009;Arian et al, 2012;Arian and Aran, 2014;Ehsani and Arian, 2015;Aram and Arian, 2016) and basement faulting (e.g., Nabilou et al, 2018;Mansouri et al, 2018) show that Iran is affected by active tectonics. In terms of lithofacies, especially the role of tectonics in the Iran sedimentary basin, Arian (2015), Razaghian et al (2018) and Taesiri et al (2020) divided all rocks into several large tectonic-stratigraphic units.…”

Investigating for hydrocarbon potential in the Sarvak and Ilam Formations using Fuzzy logic in the Fars Region, Iran

“…1 and 2) (Mo'tamedi and Tahmasebi, 2009). The Relationship between sedimentary basins (e.g., Khavari et al, 2009;, 2012; Arian and Aram, 2014;Ehsani and Arian, 2015;Aram and Arian, 2016) and basement faulting (e.g., Arian, 2012;Nouri et al, 2013a,b;Mansouri et al, 2017;Nouri and Arian, 2017;Mansouri et al, 2018;Nabilou et al, 2018) indicates the role of faults in the control of sedimentary basins in Iran. In terms of lithofacies, especially the role of tectonics in the Iran sedimentary basin, Arian (2015), Razaghian et al (2018) and Taesiri et al (2020) divided all rocks into several large tectonic-stratigraphic units.…”