The studied area located at the main suture zone of Zagros in the northeastern of Kermanshah. To do structural analysis in this area, six structural sections have been drawn perpendicular to structures direction. Structures and faults with different mechanism show that the studied area has passed two tectonic phases from Cretaceous up to present. The first phase which is a Compression phase, started from Cretaceous and lasted until Miocene. The created faults in this phase are thrusts with vast displacements in which the Main Zagros Thrust is the most important one of them. The second tectonic phase which is very young and active acts as a Transpressional system. The main structures created in second phase are dextral faults of Mianrahan and Sahne. These tow faults are part of Main Recent Fault and created some secondary structures such as Dinevar pull apart and flower structure on Sahne fault. Finally structural evolution model of the area has been expressed in six steps according to the relation among the structures and layers with different ages. During these steps, faults with the same dirctions but different mechanism have been created which demonstrates the counterclockwise rotation of stress axis σ1 since Cretaceous.

Nazi salt dome is located in the border of high Zagros and folded Zagros in the northwest of Chaharmahal Bakhtiari province. This dome is affected by Zardkooh fault in the heights of Zard Kooh. The sequence of formations in the region includes Infra-Cambrian sedimentary rocks up to the present time The aim of this study was to investigate the active tectonics associated with Zardkooh fault and Nazi salt dome in Bazaft area in Chaharmahal and Bakhtiari province, using morphometric indices. Zardkooh fault is the border of high Zagros and folded Zagros. Zardkooh fault and Nazi salt dome are both exposed on the ground. In order to study the tectonics of the study area, the study area was first divided into 59 basins Then quantitative morphometric indices such as hypostometric integral index (Hi), drainage basin asymmetry index (Af), river gradient index (SL), basin shape index (BS), mountain front sinusitis index (Smf), relatively active tectonics index (Iat) has been calculated. In Hi index, 7 basins with active new tectonic activity, 21 basins with moderate tectonic activityand 31 basins with low tectonic activity were identified. Also in Af index, 18 basins with high and activetectonic activity, 21 basins with medium tectonic activity and 20 basins with low tectonic activity were determined. One high-activity basin, two basins with moderate tectonic activity and 56 basins with low tectonic activity were identified in the SL index. In BS index, 2 basins with active tectonic activity, 2 basins with moderate tectonic activity and 54 basins with low tectonic activity were identified. In Smf 16 index, the basin has active tectonic activity and the rest of the basins have low to very low tectonic activity. Relative activity index (IAT) in the study area indicates the presence of 3 basins with active tectonic activity, 26 basins with moderate tectonic activity and 30 basins with low tectonic activity are low. Based on the calculated indicators, the study area has different basin activities from medium to low. The data show that the activity of Zardkooh fault, the activity of the Nazi salt dome, large waterways in the region, and vegetation in the region have a significant impact on the activities of the region. The area has moderate to low new construction activity.

Earth is a dynamic system that changes and evolutions are among its adherent characteristics (Ramesht & et al., 2002: 30). Almost during of a few recent thousand years, any regions on the earth’s surface are affected byneo-tectonic activities. In fact, today neo-tectonic is changing the earth's surface (Wallace, 1977). Neo-tectonic activity deals with studying the active processes and effective dynamic that are building the earth and landscapes (Keller and Pinnter, 2002: 80). Therefore, using geomorphologic indices of neotectonic activities, studying tectonic activities will be accomplish within a short time and also are usable for more accurate researches in the future. Geomorphologic indices are useful tools for assessment of neo-tectonic activities, because of using these indices, identify the areas, with fast or slow neo-tectonic activities in the past (Ramirez and Herrera, 1998: 317). These indicators are used for studying the active tectonics particularly. Geomorphologic indicators in the study of neo-tectonic activities was used by Bull and McFadden (1977) for first time and followed by other researchers such as Rockwell et al (1985); Wells et al.(1988); Silva et al (2003); Guarnieri& Pirrotta (2008). In Iran, Khayam and Mokhtari (2003); Madady & et al(2003); Vahdati Daneshmand & et al (2005); Gorabi and Nohegar (2006); Yamani et al (2007); Maghsodi and Kamrani (2007); Karami (2008); Bayati Khatibi (2008); Rameshat et al (2008); Roustaei et al (2008); Seif and Khosravi (2009) used these indices for determining the neo-tectonic activities. Major or minor active fault systems, several alluvial terraces in the margin of Jajroud River and its sub- branches, waterfalls, widening or narrowing bed channels, changing in flood channel and longitude and width of river profiles indicate that neo-tectonic is active in these regions. Thus, due to the importance of fully evaluating the tectonic activities, especially the young and contemporary tectonic movements and their hazards such as non equilibrium slopes, the present study was designed to determine the neo-tectonic activities in Jajroud Basin in the NE Tehran province (Iran). Further, has been tried for innovating in the methodology, judge about the neotectonic activities in their case study area based on results of calculating and measuring these indices and geodynamic data.

Morphology of alluvial fans with different levels might be recognized as an index from tectonic activities, because they reflect the amount of tectonic processes such as corrosion fault, displacement and folding over and next to the mountain front.The watershed of Degh Sorkh is located in tectonic zone of Iran center. Building blocks in this part of Iran are the result of young Alpine tectonic process and the general process of the main buildings of geology in this zone are matched with the general process of tectonic zones in Sanandaj, Sirjan and Zagroos.

The effect of Shushtar fault in the northern Dezful Embayment cases to several geomorphologic features that can be used to identification of geology and morphotectonic properties of the this fault. The Geomorphic indices including mountain front sinuosity (Smf), valley floor width to valley height ratio (Vf), basin shape index (Bs), stream length–gradient index (SL) and basin asymmetry index (Af) have been calculated for determination of various tectonic activities along the Shushtar fault. The mountain front sinuosity (Smf) index was calculated about 1.007 to 1.584 respectively in the active and inactive parts of the Shushtar fault. The stream length–gradient (SL) index was calculated between 898.11 in the high active tectonic and 242.8 in the low active tectonic parts of the study area. The basin shape (Bs) index has been calculated between 9.62 for the very active parts and, 2.04 for the low active parts of the fault. The amounts of valley floor width to valley height ratio (Vf) index show the range between 1 to 10.5 in the active parts with V shape valley morphology and inactive parts with U shape valley morphology respectively. Also the basin asymmetry index (Af) was calculated between 359.3 in the high active tectonic and 3.7 in the low active tectonic parts of the study area. With application of the GIS techniques and the overlaying the Smf, Bs, Vf, SL and Af data layers the area was divided into three different tectonic zones and quantitative active tectonic zoning map was prepared for the study area. In this active tectonic map, classes 1 to 3 respectively show the highest to lowest tectonic activity along the Shushtar fault. Results reveal that the Shushtar fault in the central and northwestern parts shows the medium tectonic activity and in the southeastern parts shows the low tectonic activity manner. Also results show the high tectonic activity in the some northwestern parts near the Shushtar city.

Bazman volcano, in the South East of Iran, northwest of the city of Iranshahr and is located in the north of the city Bazman. The aim of this study was active tectonic basinemanating from the Bazman volcano (with a focus over the city Bazman) and its environment as well as the level of tectonic activity in the region is the relative. In this regard has been paid to the study of morphometric indices The morphometric indices which include over Drainage Basin Asymmetry (Af), Sinuosity Front Mountain (Smf), Longitudinal slope gradient of River (SL), Floor width to valley Height (Vf), Hypsometric Integral (Hi), Mean axial tilt channel (MASC), the shape of the basin (Bs) for the study of tectonic activity in the area has been used. These indicators have been studied to evaluate the relative tectonic activity (IAT) of the basins and sub-basins of the region. The results of geomorphic analyzes are expressed as a relative index of tectonic activities (IAT). This index shows the tectonic activities of a region in four categories of low, medium, high and very high activity. on the Base of studies, the classification of tectonic activity is as follows: Area with very high relative tectonic activity in the northwestern and northeastern parts of the study area, These basins are located in the north-northeastern and eastern parts of the region, which is mainly affected by lithology (especially around the volcano), the young vertical movement of faults and active tectonic structures in these basins. The zone with moderate relative tectonic activity is located in the middle and southern parts of the region and the zone with low relative tectonic activity is located in the basins of the central, western and southwestern parts of this zone. The results of the analysis of indicators indicate tectonic activity in the area of Bazman volcano and its surroundings. Due to the located of Bazman city and population centers in the vicinity of the volcano, especially its southeastern part, the possibility of geological hazards in the future is inevitable.

The study, according to the importance of tectonic – geomorphology studies, deals with the assessment and classification of active tectonic of watershed in Kurdistan province with a comparative – quantitative approach based on the parameters of drainage network. The study includes quantitative estimation of parameters associated with tectonic drainage network and the use of hierarchical cluster analysis.The research findings showed that the studied basins are classified, tectonically active, in two different clusters. Relative comparison between the clusters show that the basins located on the first cluster have more tectonic activity with more different slopes.In this regard, the second cluster basins have less tectonic activity, more homogeneous and forming faster-cluster threshold.According to the results, it seems that the situation of the first cluster basins, with the higher tectonic activity, are due to their spatial distribution and, consequently,their impressionable of different tectonic focus particularly active faults. Also, the situation of the second cluster basins is interpreted with respect to their more homogeneous spatial position corresponding to the central region of the study area and slower activity of Sanandaj – Sirjan zone.

In mountain ranges, neotectonics can be considered as the main factor contributing to tectonic-geomorphological features being the result of the competition between tectonics and erosion. Several tectonic-geomorphological indicators such as drainage basin based (asymmetry factor of drainage basin (Af), hypsometric integral (Hi)) and mountain front based (mountain-front sinuosity (Smf), valley floor width –valley height ratio (Vf)) were used to assess the tectonic activity in the north of Damghan Region, Alborz Mountain Belt, Iran. The results highlight that the tectonic activity of the Alborz region resulted from the growth of pop-up and flower structures during tectonic inversion and following strike-slip tectonic activities. The faults of Astaneh, Damghan and North Damghan, which collectively constitute the SW part of the sinistral Shahrud fault system control the tectonic activity of the study area during the Late Quaternary.

Alvand granitoid pluton has penetrated into the metamorphic rocks of Sanandaj-Sirjan zone in the Middle Jurassic period and it has created an aura of contact metamorphism around it. Alvand granitoid pluton is the highest elevation in Hamedan region and Its catchment area is located in the south of Hamedan. In this study, the tectonic activity of catchments of Alvand Mountain has been studied based on geomorphic indices. According to the characteristics of the catchments, Asymmetry factor (Af), Hypostometric integral index (Hi), Stream length-gradient index (Sl), Mountain-front sinuosity (Smf), Valley floor width-to-height ratio (Vf), Basin Shap index (BS) and Transverse topographic symmetry index (T) has been studied and Finally, with the overlap of the obtained indices, the relative active tectonic map (IAT) of the region was determined. The values obtained for active tectonics show that the area has three zones with high tectonic activity, medium tectonic activity and finally low tectonic activity. Northeast and east of Alvand mountain shows high tectonic activity compared to other parts and There are large reverse faults with northwest-southeast striking. Existence of many new landslides in this area indicates high tectonic activity

Qeshm Island, with an area of ​​1,486 square kilometers, is located at the southeastern end of the Zagros Belt and at the western end of the Strait of Hormuz. Since the tectonic era, it seems possible to assess the influence of neotectonics and fault dynamics on island morpho-tectonic deformation using basin tectonic indicators. In this research, five indicators are extracted and calculated using satellite images, geological maps, aerial photographs, and a digital elevation model (30 meters) using various software. The smoothness and asymmetry of waterways (AF), watershed shape index (BS), cross-topographic symmetry index (T), river meandering index (S) and their comprehensive evaluation are evaluated in model form (IAT)). It is an index to evaluate the degree of tectonic deformation in the basin, and the obtained results indicate the relative dynamics of various tectonic deformations on the island. Furthermore, based on the IAT index, 26 of the 44 subbasins belong to a very high tectonic layer, consistent with the number of faults, so more active tectonic deformation is observed in the western part of the island.