Abstract
The study area is located in the north Tehran, Iran. Calculation of transverse topographic symmetry factor (T) is suitable for rapid assessment of active tectonics. Therefore, transverse topographic symmetry factors have beencalculated for the Darakeh stream. The study area is located in the Tehran Piedmont and transverse topographic symmetry factor is calculated for it. Based on values of this index, there is high relative tectonic activity level. This condition can be related to existence of a blind north-south striking fault which it may be buried by alluvium of the Darakeh stream. Dendritic drainage pattern of Darakeh stream and the fact that the western tributaries are longer than the eastern tributaries provide indirect evidence of ground tilting toward the east. Also, based on our results, most part of the study area have got high tectonic activity that it is compatible with its tectonic setting on the Tehran in north Iran.
Highlights
The Darakeh stream is located in the north Tehran, Iran (Figure 1)
There is high level of active tectonics and this situation can be related to the main blind fault such as Iranzamin fault
The T index has been calculated in the Darakeh stream in the north Tehran, Iran
Summary
The Darakeh stream is located in the north Tehran, Iran (Figure 1). The Darakeh stream is located in the WestCentral Alborz and lesser Caucasus province (Figure 2). This area belongs to Tehran piedmont geologic unit [1]. Dominant structural trend in West-Central Alborz and lesser Caucasus province is NW-SE. From tectonics view, it contains deformed zone (fold and thrust belt) of Cimmerian miniplate that formed in northern active margin until late Triassic. It contains deformed zone (fold and thrust belt) of Cimmerian miniplate that formed in northern active margin until late Triassic It has rifted by tension in a back arc basin of Neotethyian subduction zone in the south margin of Cimmerian miniplate
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