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Pattern of normal faulting in the Gediz Graben, SW Turkey

2009-07-20
Ciftci, N. Bozkurt
Bozkurt, Erdin
Hanging-wall deformation of the fault systems controlling the southern margin of the Gediz Graben were investigated separately within the Plio-Quaternary and Neogene (predominantly Miocene) deposits of the graben fill. Fault styles observed in both packages share many similarities in terms of geometry and comprise conjugate fault sets that show clustering of strike orientations predominantly around WNW-ESE but also SW-NE and NW-SE directions. The main difference between the two units is observable in terms of fault dips and rake of the slickenside lineations measured on the exposed fault planes. Both measurements show a uni-modal distribution for the Plio-Quaternary deposits but a tri-modal distribution for the Neogene deposits. This variation is probably related to the geometrical modification of the older faults by the process of domino style back-rotation in the hanging wall of higher order faults.