Assessment of relative changes in tectonic activity in the northern part of the fault Ardekul (Eastern Iran)

Abstract

Ardekoul fault zone which is along NNW-SSE is located in eastern Iran and northern part of the Sistan subzone. Dextral strike-slip fault zone of Ardekuol is made of six main segments including Korizan (28 Km), Bohn Abad (8.8 Km), Abiz (32 Km), Gazkoon (20 Km), Moein Abad (30.4 Km), Ghal Maran (12 Km), and two minor segments including Olang Morgh (12.8 Km) and Seh Pestan (9.6 Km).  The studied region in its northern part (From North to the South) is included of: Korizan, Bohn Abad and Abiz .The Parameters and their variation range are :SMF (Krizan:1.18, Bohn Abad:1.21 and Abiz:1.29), Facet% (0.725,0.771 and 0.941), S(1.04,1.13 and 1.16), V(0.97,0.83 and 0.63), SL(191.7,306.13 and 394.43), topography transverse symmetry index changes (T)(0.42,0.32 and 0.36), drainage basin asymmetry index changes(AF) (0.51,0.32 and 0.36), Reviewing uplift alluvial fan through satellite images and longitudinal profile, waterway fractal values ranging (1.982, 1.946 and 1.902), Fractal fracture ranges (1.482, 1.362 and 1.221). Neotectonic indices showed that the relative activity of each segment is different. The rate of activity has been reduced from middle part of each segment to their terminal. Generally, Ardakul fault activity rate from north to south is on the rise. We then conclude that the energy dissipation on the Ardekoul fault is linear. Although it has different amount, but it generally has a linear distribution from the North to the South. According to the neotectonic indicators the section which is studied is placed in the A class (Tectonic activities are very high).

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