Akademik Veri Yönetim Sistemi
TURKIYE JEOLOJI BULTENI-GEOLOGICAL BULLETIN OF TURKEY, cilt.63, sa.3, ss.345-372, 2020 (ESCI, TRDizin)
The Golmarmara Basin forms the northern branch of the Gediz Graben, which constitutes a series of horst-graben systems controlled by antithetic and synthetic normal fault steps in the Western Anatolia Extensional Province. Although geology of this section is well known, it is not studied enough in terms of active tectonics and geomorphology The aim of this study is to reveal fault segments on the basis of Quaternary activity and structural evolution of the Golmarmara Fault forming the southern boundaty of the basin. The NW-SE trending Golmarmara Fault, which consists of the 7 km-long Ismetpasa and 11 km-longliacthaftanlar segments, has 26 drainage basins and 23 triangular facets in its footwall. Morphometric analyses (S-mf, V-f, AF, HI, Shp, S-L, Slip Rate) based on the digital elevation model were performed for these structures. According to combined results of our morphometry and field studies, the ismetpasa Segment has higher uplift and activity than the Hacibastanlar Segment, and they are linked by a relay ramp developing during the evolution of a complete fault zone. It can be said that the Golmarmara Fault, which was found to have passed through 3 phases from its formation to the present day, is an en-echelon fault similar to when it formed. Morphometric indices and field data indicate that the Golmarmara Fault is composed of medium-highly-active dip-slip normal fault segments and may cause earthquakes with a magnitude of Mw: 6.4. The Golmarmara Fault, consisting of 2 geometric and 1 seismic segment, has uplift rate ranging from 0.179 to 0.518 mm/year (increasing at the center, and decreasing at the tips of the fault). These values are similar to uplift rates calculated for other active normal faults in the Gediz Graben.