tailieunhanh - Tectonic geomorphology of the Yatağan Fault (Muğla, SW Turkey): implications for quantifying vertical slip rates along active normal faults

South Western Anatolia is dominated by E-W and NW-SE trending active faults. The dip-slip Yatağan Fault is one of these active structures that trends in a NW direction for ~30 km. To assess the relative tectonic activity of the Yatağan Fault, two geomorphic segments were defined along the fault: the FS-1 (northern segment) and the FS-2 (southern segment). The vertical slip rate pattern of the fault was analyzed using steepness indexes, chi (χ) plots, and log-log slope area graphs. Results of the analyses indicate that the steepness of the streams draining the footwall reveal increasingly higher values downstream along the fault. | Turkish Journal of Earth Sciences Turkish J Earth Sci 2021 30 460-488 http earth TÜBİTAK Research Article doi yer-2010-11 Tectonic geomorphology of the Yatağan Fault Muğla SW Turkey implications for quantifying vertical slip rates along active normal faults 1 2 3 4 1 Mehran BASMENJI Taylan SANÇAR Aynur DİKBAŞ Sarah J. BOULTON Hüsnü Serdar AKYÜZ 1 Department of Geological Engineering Faculty of Mines İstanbul Technical University İstanbul Turkey 2 Department of Geography Munzur University Tunceli Turkey 3 Department of Geological Engineering Faculty of Engineering İstanbul University-Cerrahpaşa İstanbul Turkey 4 School of Geography Earth and Environmental Sciences University of Plymouth Plymouth UK Received Accepted Published Online Final Version Abstract South Western Anatolia is dominated by E-W and NW-SE trending active faults. The dip-slip Yatağan Fault is one of these active structures that trends in a NW direction for 30 km. To assess the relative tectonic activity of the Yatağan Fault two geomorphic segments were defined along the fault the FS-1 northern segment and the FS-2 southern segment . The vertical slip rate pattern of the fault was analyzed using steepness indexes chi χ plots and log-log slope area graphs. Results of the analyses indicate that the steepness of the streams draining the footwall reveal increasingly higher values downstream along the fault. All of the main basins contain at least one slope-break knickpoint associated with tectonic uplift. Facet morphology-based investigations using empirical methods along faceted spurs of the Yatağan Fault indicate vertical slip rates of mm year and mm year for the FS-1 and the FS-2 according to relationship of facet slope angle Rsa . Additionally using the facet basal height relationship Rbh we calculated slip rates of mm year and mm year for the FS-1 and the FS-2 segments respectively. Mountain front .

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