Tectonic geomorphology of Bozdoğan and Karacasu grabens, western Anatolia
Özsayin, Erman (Hacettepe University. Department of Geological Engineering)
Dirik, Kadir (Hacettepe University. Department of Geological Engineering)
Ocakoğlu, Faruk (Eskişehir Osmangazi University. Department of Geological Engineering)
Açikalin Cartigny, Sanem (New Castle University. School of Natural and Environmental Sciences)
Sağlam Selçuk, Azad (Van Yüzüncü Yıl University. Department of Geological Engineering)

Data:	2023
Resum:	Western Anatolia is one of the most rapidly extending and seismically active regions in the world. The circa N-S extension since the Early Miocene caused the formation of E-W trending major grabens and intervening horsts, having earthquake potentials with magnitude ≥5. The E-W oriented Büyük Menderes graben cross-cuts the broadly N-S oriented Bozdoğan and Karacasu grabens, of which the boundary faults of the latter are the source of seismic activity. Geomorphic indices, including drainage basin asymmetry, mountain front sinuosity, valley-floor width to valley height ratio, stream length-gradient index and normalized channel steepness index, were used to evaluate the boundary fault segments of the Bozdoğan and Karacasu grabens. The results indicate that both grabens are tectonically active and therefore regions of earthquake potential, consistent with the epicenters of earthquakes. Thus, it can be inferred that fault segments of second-order grabens, which are crosscut by the boundary faults of seismically active main depressions, are apparently reactivated by ongoing tectonism and may represent seismic activity. This suggestion applies also for similar basins located in the western Anatolia.
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre i quan aquestes es distribueixin sota la mateixa llicència que regula l'obra original i es reconegui l'autoria.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Karacasu graben ; Bozdoğan graben ; Geomorphic indices ; Uplift rate ; Seismic activity ; Western anatolia
Publicat a:	Geologica acta, Vol. 21 (2023) , p. 1-14 (Articles) , ISSN 1696-5728

Adreça original: https://raco.cat/index.php/GeologicaActa/article/view/413219
Adreça alternativa: https://revistes.ub.edu/index.php/GEOACTA/article/view/39825
DOI: 10.1344/GeologicaActa2023.21.1

14 p, 12.7 MB

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