Evaluation of tectonic activity in Golpayegan area using Smf index and Movement Potential of Active Faults (A Case Study of Northwest Hendikush To the southeast of the Dareh Bid)

Haj Nowrozi, Nafisa; Pourkarmani, Mohsen; Arin, Mehran; Maleki, Zahra; Solgi, Ali

doi:10.22034/irqua.2021.702417

Evaluation of tectonic activity in Golpayegan area using Smf index and Movement Potential of Active Faults (A Case Study of Northwest Hendikush To the southeast of the Dareh Bid)

Document Type : Original Article

Authors

Nafisa Haj Nowrozi ¹

Mohsen Pourkarmani ²

Mehran Arin ¹

Zahra Maleki ¹

Ali Solgi ¹

¹ Faculty of Basic Sciences, Islamic Azad University, Science and Research Unit, Tehran

² Faculty of Basic Sciences, Islamic Azad University, North Tehran Branch, Tehran

https://doi.org/10.22034/irqua.2021.702417

Abstract

Study of area (Golpayegan area) is located in the Sanandaj-Sirjan structural zone, which is one of the most dynamic tectonic seismic zones in Iran. Among the most important faults of Janba in the study area, we can mention Khansar, Hila, Narpalang, Boland Ab, Qara No, Bid Arab faults. In this study, a theoretical model is proposed to evaluate the Fault Movement Potential based on the relationship between the geometric properties of the fault and the regional tectonic stress field. This model by et al. (1997) Lee, and has been used to evaluate the mobility potential of major faults in the Hong Kong area. This parameter allows for the percentage of possible movements in the current tectonic regime (CTR) for all active faults in a range. It should be noted that the results of this method are consistent with past seismic records and current micro-seismic activity in the region, so this theoretical model is based on the relationship between the geometric properties of faults and the regional tectonic stress field. To evaluate the mobility potential of active faults in Golpayegan area in the northwest of Kush to the southeast of Bid valley, the structural zone of Sanandaj-Sirjan.
Methods:
Structural data were collected in a large area of the study area in order to achieve the position of the main stress axes. The equations of this model were used in 6 stations in the mentioned area. Finally, using the inversion method, the maximum maximum stress in each section was obtained separately and placed in the equations.
Conclusion:
According to the calculations, the motion potential of the fault in each section of the faults in the area was determined that the Arab willow fault has the highest movement potential compared to other fault parts, which according to the calculation of the mountain frontal maze index is well visible. Category 1 tectonics with high activity, other faults are in the pre-seismic stage. The results of calculating the potential of faults in each section show a good agreement with the frequency of earthquakes, so that the eastern part of the study area has a higher seismicity rate than other parts. Due to the average landslide velocity of faults in recent years and also according to previous studies and results obtained from the area and data from the calculation of fault potential values, the eastern part of the area (the distance between Arab willow fault and male leopard fault ) Has the highest probability of slipping in the future. The southern part of Bid Arab fault is associated with the highest mobility potential of the fault and the tectonic structures of its areas are introduced as the youngest neotectonic activities in the area.

Keywords

Active Fault

Movement potential

Maximum mainly stress

Regional tectonic stress field

20.1001.1.24237108.1400.7.1.5.1

Subjects

Neotectonics and faults

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