Analysis of the Tectonic Status of the Northwestern Zagros Anticlines and its Relationship with Seismic Centers

Tectonic factors play an important role in landform changes in the regions. Based on these changes, the tectonic state of the regions can be assessed, so analyzing the tectonic status of landforms for environmental management and various planning is important. Accordingly, in this study, the tectonic status of anticlines in the northern and western regions of Kermanshah province, Iran, and its relationship with seismic centers were investigated. Digital 30-meter SRTM model, 1: 50,000 topographic maps, 1: 100,000 maps of the region, as well as the information on the epicenter of earthquakes that occurred in the region during the years 1900 to 2020, were used as research data. This research was done in three general stages. In the first stage, using 8 geomorphic indices, the tectonic situation of 5 anticlines of Ezgeleh, Daneh Khoshk, Sanjabi, Mahidasht and Vis was analyzed. In the second stage, the location map of the seismic centers that occurred in the region during the years 1990 to 2020 was prepared. In the third stage, the relationship between the tectonic activity of the anticlines in terms of different indicators and focal points of the earthquakes that have occurred, was evaluated. Based on the results, the anticlines of the western regions (anticlines of Ezgeleh, Daneh Khoshk) have a more active tectonic status than the anticlines of the eastern regions. Moreover, considering that the western parts of the region had the highest number of seismic centers, so it can be said that there is a direct relationship between the seismic centers and the tectonic position of the anticlines.