Coğrafi bilgi sistemleri kullanılarak Narlı Fayı'nın (Çatak-Van) göreceli tektonik evriminin morfometrik indislerle belirlenmesi

NAZIM DOĞAN

Coğrafi bilgi sistemleri kullanılarak Narlı Fayı'nın (Çatak-Van) göreceli tektonik evriminin morfometrik indislerle belirlenmesi

Thesis Type: Postgraduate

Institution Of The Thesis: Van Yüzüncü Yil University, Fen Bilimleri Enstitüsü, Jeoloji Mühendisliği (Yl), Turkey

Approval Date: 2023

Thesis Language: Turkish

Student: NAZIM DOĞAN

Supervisor: Azad Sağlam Selçuk

Open Archive Collection: AVESIS Open Access Collection

Abstract:

The Narlı Fault is one of the thrust faults located in the southernmost part of the Eastern Anatolia Shortening Region. The faults in this area continue from west to east as the Begendik, Narlı and Işıklar Segments and these segments form part of the Southeastern Anatolian Overlay Zone. The Narlı Fault is a north-dipping Quaternary fault located between the villages of Narlı (Çatak) and Bükeç. The Narli Fault, which is about 32 km long and has directions ranging from W75E to N55W, shows a concave geometry. The Narlı Fault borders the southern edge of a 5 km wide deformation area, and to the north of this area it is bounded by a second thrust fault extending in the same direction. In this study, the tectonic geomorphology and deformation characteristics of the Narlı Fault were investigated with the help of morphometric analyzes, which are frequently used in active tectonic studies in recent years. The morphometric indices used in the study are: mountain front sinuosity (Mfc), valley floor width-to-valley height ratio (Vf), asymmetry factor (AF), normalized channel steepness index, hysometric curve and integral (HC and HI), stream length gradient index (SL). According to the results of the analysis, Smf values vary between 1.10 and 1.29, while Vf values are between 0.04 and 0.33. of the 85 sub-basins in the study area, 25 are the dominant asymmetrical basin and the Ksn values are high at the western and eastern ends. High HI values (>0.5) were observed in the eastern end of the S1 segment, while in the central and eastern parts of the S2 segment. It was concluded that in the central parts of the Narlı fault, the index values and the deformation in the northern block were higher than in the south. These results show that although the Narlı Fault is referred as the Quaternary Fault, the region has taken an active role in the evolution of deformation.