Determination of Relative Tectonic Activity Levels of Stream Basins in the Part of the North Anatolian Fault Zone between Tosya-Kargi-Kamil by Geomorphometric Methods

Abstract

The east-west Kizilirmak River Valley rests on a fault line in the central part of the North Anatolian Fault (NAF) Zone that extends from Tosya to Kargi from southwest to northeast, between the Devrez River Valley and Kargi-Kamil. The side creeks connected to the main streams from the slopes in both segments cut the faults that make up the NAF Zone, mostly steeply. This reflects in the drainage system and basin morphometry. Tectonic activity levels of the stream basins were obtained by measurement of the reflection of relative tectonic activity on geomorphometric parameters in the field. In addition to lithologically homogeneous segments such as Mount Kos, segments with more complex lithology, such as the Ilgaz Mountains, have been factors affecting geomorphometric parameters. The effect of the Dodurga-Hacihamza Fault Zone, which cuts the NAF Zone in the south and consists of normal faults with right-lateral displacement, is reflected in these parameters. The geomorphometric parameters obtained in the southern block of the NAF, especially in the stream basins on Mount Kos, indicate that relative tectonic activity is higher there.