The Denizli graben-horst system and the eastern limit of western Anatolian continental extension: basin fill, structure, deformational mode, throw amount and episodic evolutionary history, SW Turkey


Kocyigit A.

GEODINAMICA ACTA, vol.18, pp.167-208, 2005 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Review
  • Volume: 18
  • Publication Date: 2005
  • Doi Number: 10.3166/ga.18.167-208
  • Journal Name: GEODINAMICA ACTA
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.167-208
  • Keywords: normal fault, relay ramp, fissure ridge, incipient graben, episodic two-stage extension, Denizli Graben, Southwest Turkey, SOUTHERN MENDERES MASSIF, ALPINE-HIMALAYAN BELT, GEDIZ GRABEN, SOURCE PARAMETERS, ACTIVE TECTONICS, ISPARTA ANGLE, PALEOMAGNETIC EVIDENCE, 2-STAGE EXTENSION, AUGEN GNEISSES, FIELD EVIDENCE

Abstract

The Denizli graben-horst system (DGHS) is located at the eastern-southeastern converging tips of three well-identified major grabens, the Gediz, the Kucuk Menderes and the Buyuk Menderes grabens, in the west Anatolian extensional province. It forms a structural link between these grabens and the other three NE-NW-trending grabens-the Civril, the Acigol and the Burdur grabens-compri sing the western limb of the Isparta Angle. Therefore, the DGHS has a critical role in the evolutionary history of continental extension and its eastward continuation in southwestern Turkey, including western Anatolia, west-central Anatolia, and the Isparta Angle. The DGHS is a 7-28-km wide, 62-km long, actively growing and very young rift developed upon metamorphic rocks of both the Menderes Massif and the Lycian nappes, and their Oligocene-Lower Miocene cover sequence. It consists of one incipient major graben, one modem major graben, two sub-grabens and two intervening sub-horsts evolved on the four palaeotectonic blocks. Therefore, the DGHS displays different trends along its length, namely, NW, E-W, NE and again E-W.