Pattern of normal faulting in the Gediz Graben, SW Turkey

Ciftci N. B., BOZKURT E.

TECTONOPHYSICS, vol.473, pp.234-260, 2009 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Review
  • Volume: 473
  • Publication Date: 2009
  • Doi Number: 10.1016/j.tecto.2008.05.036
  • Journal Name: TECTONOPHYSICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.234-260
  • Keywords: Normal faulting, Continental extension, Palaeostress analysis, Gediz Graben, SW Turkey, CENTRAL MENDERES MASSIF, WESTERN ANATOLIA, TECTONIC EVOLUTION, EXTENSIONAL TECTONICS, REGIONAL STRESS, RELAY RAMPS, 2-STAGE EXTENSION, TRENDING SELENDI, ALASEHIR GRABEN, BASIN FORMATION
  • Middle East Technical University Affiliated: Yes

Abstract

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.