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- MakaleAçık Erişim2021Active Tectonic Setting and Paleoseismicity of the Sancak-Uzunpazar Fault Zone; [Sancak-Uzunpazar Fay Zonu’nun Genç Tektonik Konumu ve Paleosismitesi]
Selcuk, Azad Saglam; Erturac, Mehmet Korhan; Karabacak, Volkan; Sancar, Taylan; Kul, Ahmet Ozkan; Yavuz, Mehmet Ali
Sancak-Uzunpazar Fault Zone is N40E-trending sinistral shear zone that has a 50 km length and 5 km width between Karakocan (Elazığ) in southwest and Kaynarpınar (Bingöl) in northeast. The fault extends parallelly to East Anatolian Fault is bounded by the North Anatolian Fault to the northeast and Karakoçan Fault to the southeast. Herein, morphological features, the tectonic setting of the Sancak-Uzunpazar Fault Zone and the first paleoseismological studies on it is represented. The Sancak-Uzunpazar Fault Zone is consist of two parallel segments (called East and West) with a 1.5 km distance. Conducted field studies and aerial photogrometry show that the segments exhibit morphological features like faceted surfaces, faulted scarps, shutter ridges, and offset streams. Especially, average offsets are about 7-12 m along the eastern segment while the cumulative maximum offset reaches 1.1 km. Moreover, revealed paleoseismological data show evidence of at least two surface ruptures during Holocene. Obtained morphological data reveal that the Sancak-Uzunpazar Fault Zone may have a relatively lower slip rate when compared to other active faults in the region and the reflection of the slip rate to the morphology is more evident in the eastern segment.
AtıfScopus1OpenAlex2TR Dizin3
İncele - MakaleAçık Erişim2021Scopus SJRQ2Tectonic geomorphology of the yatağan fault (Muğla, sw turkey): Implications for quantifying vertical slip rates along active normal faults
Basmenji, Mehran; Sançar, Taylan; Dikbaş, Aynur; Boulton, Sarah J.; Akyüz, Hüsnü Serdar
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 0.16 ± 0.05 mm/year and 0.3 ± 0.05 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 0.24 mm/year and 0.36 mm/year for the FS-1 and the FS-2 segments, respectively. Mountain front sinuosity analysis yields values of 1.34 and 1.2, while the ratio of valley-floor width to valley height gives values of 0.64 and 0.24 for the FS-1 and the FS-2 respectively, indicating typical active mountain front where the uplift rates are ≥ 0.5 mm/year. Hypsometric analysis suggest a transition from mature to older stage for catchments along the Yatağan Fault. Comprehensive interpretation of the results from morphometric analysis, vertical slip rate calculations, and data based on field observations suggest preponderance of tectonic activity over erosional process along the Yatağan Fault. Our analyses reveal that the rate of the tectonic activity gradually increases from the FS-1 to the FS-2 along the fault.
AtıfScopus4
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