Fission-track evidence for late Oligocene and mid-Miocene activity along the North Anatolian Fault in south-western Thrace |
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| Authors: | Massimiliano Zattin Aral I Okay William Cavazza |
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| Institution: | Department of Earth and Geoenvironmental Sciences, University of Bologna, Bologna, Italy;;Department of Geology, Palaeontology and Geophysics, University of Padova, Padova, Italy;;Eurasia Institute of Earth Sciences, Istanbul Technical University, Istanbul, Turkey |
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| Abstract: | Apatite fission-track (FT) analyses of sandstone samples collected across the trace of the Ganos segment of the North Anatolian Fault (NAF) in south-western Thrace (Turkey) indicate that a significant structural discontinuity was in existence at least by the latest Oligocene. Such discontinuity had a complex kinematic history, as exhumation south of it occurred during the latest Oligocene and north of it during the mid-Miocene. Our data imply that early Pliocene westward propagation of the NAF in the Marmara region followed a pre-existing structural discontinuity; such discontinuity could be related to the development of the Intra-Pontide Suture, marking the terminal closure of the Intra-Pontide Ocean during the Oligocene. |
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