جستجوی مقالات مرتبط با کلیدواژه "گسل های جنبا" در نشریات گروه "زمین شناسی"

In this article, the activity of FMP in Pardis region, southeastern part of Central Alborz, has been studied.Some of the most the most important active faults in the study area are Mosha, Telo Paien,Latian, Sorkhe Hessar, Eivanakai, Qasre Firozeh, Kowsar, Niavaran, Qebleh faults. Methods In this study, a theoretical model for evaluating FMP based on the relationship between the geometric properties of the fault and the regional tectonic stress field is proposed. 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 regional tectonic stress field. The main purpose of this study is to evaluate the FMP of the campus area in the northwest of Niknam Deh to the southeast of Chenark. Using structural data, in order to achieve the position of the main stress axes, in a large area of the study area . Results and iscussion: According to FMP calculations in each section, it was determined that Mosha, Latian and Niavaran faults have the highest Movement potential compared to other fault sections. Conclusion The results of calculations in each section show a good agreement with the frequency of earthquakes, so that the eastern part of the region has a higher seismicity rate than other parts and the eastern part of the region (between Mosha fault and Niavaran fault) It will have the highest probability of landslide in the future, while the southern part of Niavaran fault is associated with the highest amount of FMP and the tectonic structures of its areas are introduced as the youngest neotectonic activities in the area.

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.

 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.

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.

The N-NW trending Qom-Zefreh fault system has long been recognized as one of the major faults in Central Iran. We have used observations of faulting, recognized on satellite images and aerial photos, in conjunction with field investigations, to infer fault activity along this structure in an area between Zefreh and the north of Kashan. Right-lateral strike-slip motion along this fault can be inferred from the associated lateral offset of stream beds and alluvial fan observed on aerial photographs and on the field. Morphological features and observations of fault exposure in several places also indicate that the western block is up-thrown relative to the eastern block across reverse component of the Qom-Zefreh fault system. Using changes in fault geomorphology and fault trace orientation we have defined two segment boundaries and structurally divided the Qom-Zefreh fault system into three segments in the region, namely Zefreh, Kashan and Ravand segments. The recognition of these segments is important because it may have implication in assessment of seismic hazard for the Kashan region.