Geology of the northern side of the Gulf of Edremit and its tectonic significance for the development of the Aegean grabens |
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| Institution: | 1. Department of Bioresources, School of Biological Sciences, University of Kashmir, Srinagar, Jammu and Kashmir, India;2. Department of Microbiology, School of Biological Sciences, University of Kashmir, Srinagar, Jammu and Kashmir, India;3. Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Majmaah University, Saudi Arabia;1. Université d''Orléans, ISTO, UMR 7327, 45071 Orléans, France;2. CNRS/INSU, ISTO, UMR 7327, 45071 Orléans, France;3. BRGM, ISTO, UMR 7327, BP 36009, 45060 Orléans, France;4. Sorbonne Université, CNRS-INSU, Institut des Sciences de la Terre Paris, ISTeP UMR 7193, F-75005 Paris, France;5. Department of Geology and Geoenvironment, National & Kapodistrian University of Athens, Zografou 15784, Greece;6. Middle East Technical University, Department of Geological Engineering, Üniversiteler Mahallesi, Dumlup?nar Bulvar? No: 1, 06800 Ankara, Turkey;7. Center for Global Tectonics, China University of Geosciences, Wuhan, 388 Lumo Road, Hongshan District, Wuhan 430074, Hubei Province, China;8. State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, 388 Lumo Road, Hongshan District, Wuhan 430074, Hubei Province, China;9. Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Univ. Paris Diderot, CNRS, F-75005 Paris, France;10. Total SA - CSTJF, Avenue Larribau, 64000 Pau, France |
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| Abstract: | This paper describes the Neogene evolution of northwestern Anatolia based on geological data collected in the course of a new mapping program. The geological history of the region, as recorded by the Neogene sedimentary and magmatic rocks that overlie the Paleozoic–Triassic basement, began after a lake invasion during the Early Miocene period with the deposition of shale-dominated successions. They were accompanied by calc-alkaline intermediate lavas and pyroclastic rocks ejected through NNE trending fractures and faults. The Lower–Middle Miocene successions were deformed under a compressional regime at the end of the Middle Miocene. The deposition of the overlying Upper Miocene–Lower Pliocene successions was restricted to within NE–SW trending graben basins. The graben bounding faults are oblique with a major strike-slip displacement, formed under approximately the N–S extension. The morphological irregularities formed during the Miocene graben formations were obliterated during a severe erosional phase to the end of the deposition of this lacustrine succession. The present E–W graben system as exemplified from the well-developed Edremit graben, postdates the erosional phase, which has formed during the Plio-Quaternary period. |
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