Structural evolution of the Gediz Graben, SW Turkey: temporal and spatial variation of the graben basin

Ciftci, N. B.
Bozkurt, Erdin
The structural evolution of the Miocene to Recent Gediz Graben is intimately related to the evolution of its southern margin. This margin is shaped by a time-transgressive, composite structure that possesses flat-ramp geometry with three separate dip domains: a low-angle shallow segment; a steeper middle segment; and a low-angle deeper segment. This geometry was probably produced by one of two mechanisms, which operated perpendicular to the general trend of the graben, resulting in gradual back-rotation followed by abandonment of the shallow segment as it was dissected by the high-angle normal fault(s). The geometry of the southern margin structure is not simple along-strike. It includes broad undulations and discrete fault segments, developed by large-scale fault growth processes through segment linkage. The along-strike growth of the southern margin-bounding structure is responsible for the composite character of the Gediz Graben and controls the observed stratigraphic variability. Two sub-basins aligned with the major segments of the southern graben margin structure have been investigated. The Salihli and Alasehir sub-basins comprising 3000 m sedimentary thickness are separated by an intervening basement high, that is covered by a thin veneer of post-Miocene sediments. The two sub-basins, which evolved as isolated basins during most of the graben history, amalgamated during post-Miocene time to form the composite configuration of the graben. There is a general east to west trend of growth for the Gediz Graben.


Rapid cooling history of a Neotethyan ophiolite: Evidence for contemporaneous subduction initiation and metamorphic sole formation
PARLAK, OSMAN; Dunkl, Istvan; KARAOĞLAN, FATİH; Kusky, Timothy M.; Zhang, Chao; Wang, Lu; Koepke, Juergen; Billor, Zeki; Hames, Willis E.; ŞİMŞEK, EMRAH; Simsek, Gokce; ŞİMŞEK, TUĞÇE; Ozturk, Selena Ezgi (Geological Society of America, 2019-11-01)
The Beywhir-Hoyran Nappes, including Mesozoic carbonate platform rocks, deepsea sediments, and ophiolite-related units, crop out extensively on the western limb of the Isparta Angle in the Central Taurides, Turkey. The ophiolite-related rocks are represented by variably serpentinized harzburgitic mantle tectonites, tectonically underlain by a subophiolitic metamorphic sole and melange. The harzburgitic mantle tectonites and metamorphic sole are intruded by undeformed isolated dikes. Protoliths of the metamo...
Post-paleogene stress distribution in the Bartın-Ulus-Safranbolu Basins, Western pontides, Turkey
Bengü, Emre; Rojay, Fuat Bora; Department of Geological Engineering (2017)
The thesis addresses the post-Paleogene tectonic evolution of the Bartın-UlusSafranbolu basins in Western Pontides. The study area is bounded by Black Sea from north, Sünnice Massif from west, Kargı Massif from east, and by Cretaceous ophiolitic mélanges and the North Anatolian Fault from south. These basins are separated from each other by the two main faults, namely, Bartın and Karabük faults. Four structural domains are defined, based on lithostratigraphic differences and bounding major faults, to figure...
Lithospheric structural control on inversion of the southern margin of the Black Sea Basin, Central Pontides, Turkey
Espurt, Nicolas; Hippolyte, Jean-Claude; Kaymakcı, Nuretdin; SANĞU, ERCAN (GeoScienceWorld, 2014-02-01)
To illustrate the structural evolution of the Black Sea Basin in the context of Neotethyan subduction and subsequent continental collisions, we present the first lithosphere-scale, similar to 250-km-long, balanced and restored cross section across its southern continental margin, the Central Pontides. Cross-section construction and restoration are based on field, seismic-reflection, geophysical, and apatite fission-track data. The structure of the onshore Pontides belt is predominantly controlled by inverte...
Palaeomagnetic evolution of the Cankiri Basin (central Anatolia, Turkey): implications for oroclinal bending due to indentation
Kaymakcı, Nuretdin; Langereis, Cor; White, Stan; van Dijk, Paul (Cambridge University Press (CUP), 2003-05-01)
Palaeomagnetic data in combination with palaeostress data and anisotropy of magnetic susceptibility orientations are utilized to develop a tectonic evolutionary model for the Early Tertiary part of the Omega(omega)-shaped Cankiri Basin (Turkey). The results reveal clockwise rotations in the northeast and anticlockwise rotations in the west and southeastern corner of the basin. The magnetic inclinations indicate a northward drift of the Cankiri Basin and support an indentation model for the Kirsehir Block. I...
Bozkurt, Erdin (Geological Society of London, 1994-03-01)
In the southern sector of the Menderes Massif, north of Selimiye (Milas) augen gneisses interpreted as a deformed peraluminous granite have been dynamothermally metamorphosed and are surrounded by and intrude a regionally metamorphosed Palaeozoic 'envelope'. The granitic rocks exhibit a moderately-dipping mylonitic foliation and NNE-SSW- trending mineral elongation lineation. The progressive deformation of the granitic rocks produces a structural sequence typical of an extensional shear zone marked, from bo...
Citation Formats
N. B. Ciftci and E. Bozkurt, “Structural evolution of the Gediz Graben, SW Turkey: temporal and spatial variation of the graben basin,” BASIN RESEARCH, pp. 846–873, 2010, Accessed: 00, 2020. [Online]. Available: