Gediz ayrilma zonu: Fay kayaci stratigrafisi ve tektonik önemi

Low-angle Gediz detachment fault, which extends along the southern rim of the Gediz Graben, constitutes a detachment zone that including various cataclastic rocks and milonitic fabrics. The depth of the zone changes between 55-140 m. Based on the field observations and petrographic studies, the cataclastic rocks exhibit a well defined succession. The detachment zone can be devided into 3 parts; (1) transition zone, (2) mylonitic zone and (3) breccia zone. The transition zone is composed of physically and chemically altered metamorphic and granodioritic excuse, and metagranodiorites which include mylonitic fabrics. Ductile deformed mylonit schist, mylonit, cataclasite, ultramylonit and microbreccia make-up the mylonitic zone. Breccia zone is composed of microbreccia and fault breccia. The overall succession indicates a ductile deformation, fallowed by a progressive brittle deformation. Therefore, the Gediz detachment zone shows the characteristics of the extensional regime that governed the region during Miocene.