The ductile shear zone in granitoid of the Central Anatolian Crystalline Complex,Turkey: Implications for the origins of the Tuzgölü basin during the Late Cretaceous extensional deformation |
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| Authors: | Veysel Isik |
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| Institution: | 1. Laboratoire de Géologie de Lyon, Université de Lyon, Université Lyon 1, ENS de Lyon, CNRS, 2 rue Raphael Dubois, 69622 Villeurbanne, France;2. School of Geosciences, Monash University, Clayton, Vic 3800, Australia;3. Wadia Institute of Himalayan Geology, 33, GMS Road, Dehra Dun-248001, India;4. Tectonics Group, Earth Observatory of Singapore, Nanyang Technological University, Singapore;5. Equipe de Tectonique, Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Univ Paris Diderot, UMR 7154 CNRS, F-75005 Paris, France;6. Institute of Geosciences, Johannes Gutenberg University Mainz, J.-J.-Becher-Weg 21, D-55128 Mainz, Germany;7. State Key Laboratory of Tectonics and Continental Dynamics, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;8. Newmont Mining Corporation, Perth Area, Australia;9. Géosciences Montpellier, UMR CNRS 5243, Université de Montpellier 2, France;10. Laboratoire Magma et Volcans, UMR CNRS 6524, Université Blaise Pascal, Université de Clermont-Ferrand, France;1. Nigde Omer Halisdemir University, Faculty of Arts and Sciences, Department of Geography, 51240, Nigde, Turkey;2. Izmir Institute of Technology, Geothermal Energy Research and Application Center, 35430, Izmir, Turkey;1. Institute of Geosciences, Dept. of Geophysics, Kiel University, Otto-Hahn-Platz 1, 24118, Kiel, Germany;2. Institute for Geography, University of Cologne, Albertus-Magnus-Platz, 50923, Köln (Cologne), Germany;3. German Archaeological Institute (DAI), Fidiou 1, 10678, Athens, Greece;4. German Archaeological Institute (DAI), Inönü Caddesi 10, 34437, Istanbul, Turkey;1. Aix Marseille Univ, CNRS, IRD, INRA, Coll France, CEREGE, Aix-en-Provence, France;2. Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, USA;3. Istanbul Technical University, Eurasia Institute of Earth Sciences, 34469 Maslak, Istanbul, Turkey;4. IFREMER, Département Ressources physiques et Ecosystèmes de fond de Mer (REM), 29280 Plouzané, France |
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| Abstract: | The Emizözü shear zone is the west–northwest-trending ductile shear zone within the A?açören granitoid in central Turkey. Deformation that affected the granitoid along the Emizözü shear zone resulted in mylonites with mylonitic foliation and stretching lineation. The textural features of the deformed minerals suggest that mylonitization occurred under conditions of upper greenschist facies. The shear indicators, including asymmetric porphyroclasts, oblique foliation, and shear bands, suggest a down-dip (top-to-the-southwest) displacement. The orientation of stretching lineation, as well as kinematic indicators, indicates the extensional character of the Emizözü shear zone. Although it is not precisely dated, the available age constraints suggest that the zone formed at 78–71 Ma. According to field and micro-structural data, the A?açören granitoid was most likely emplaced during a regional deformation in central Turkey, and synchronously or shortly after was overprinted by the extensional Emizözü shear zone. The zone can also be correlated with the earlier stage development of the Tuzgölü basin in central Turkey. |
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