1-Introduction Aghajari Fault has been located in the Dezful embayment, and it is one of the critical faults in the Khuzestan Province. Hence the study of geomorphic indices for determination of amounts of neo-tectonic activity is vital. In this research, with the application of remote sensing and GIS methods, the geomorphic indices along the Aghajari Fault have been studied. Morphotectonic is the study of geological features for determining the amounts of tectonic activity in each area (Burbank and Anderson, 2012; Grohmann, 2004). Determination, the amounts of geomorphic indices, can help to fast estimate from a different tectonic manner of faults in different parts. Several geomorphic indices can help the geologist for determining the different tectonic activity or neotectonic manner of faults. In this context, several geomorphic indices have been studied for the fault for the determination of neo-tectonic behaviors of Aghajari fault...

Sabalan Mountain is one of main morphtectonic units of Iran. This unit has extensive area, therefore in this research only southern slopes of Sabalan have been selected. Study area is located between 37o 56´ to 38o 14´ N and 47o 36´ to 48o 00´ E. Selected area from hydrograph is formed of four basins, including Pislarchay, Aghmion, Biokchay and Aghlaghanchay. There are several faults in this area as geomorphic evidences. Main effects of these include linear valley, offset stream, escarpment, shutter ridges, displacement of alluvial fan and hot spring.Southern slopes of Sabalan Mountain are active in terms of tectonic processes. For investigation of neotectonic characteristic we used several geomorphic indexes such as mountain front sinuosity (Smf), ratio of valley-floor with to valley height (VF), drainage basin shape ratio (BS), asymmetry factor (AF), topographic symmetry factor (T) and latitude ratio. This index was calculated in four basins in separation. According to Smf and VF results, two basins have active conditions and two others are semi active. BS index for all basins presents active tectonic. The results of AF and T confirm the above conclusion. In the end we used Latitade (Lat) ratio. According to this index, three basins are in active condition.