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<title lang=en>The two-stage aegean extension, from localized to distributed, a result of slab rollback acceleration</title>
<creator>Brun,, Jean-Pierre</creator>
<creator>Faccenna, Claudio</creator>
<creator>Gueydan, Frédéric</creator>
<creator>Sokoutis, Dimitrios</creator>
<creator>Philippon, Mélody</creator>
<creator>Kydonakis, Konstantinos</creator>
<creator>Gorini, Christian</creator>
<contributor>Géosciences Rennes (GR) ; Université de Rennes 1 (UR1) - Institut national des sciences de l'Univers (INSU - CNRS) - Observatoire des Sciences de l'Univers de Rennes (OSUR) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Laboratory of Experimental Tectonics ; Università degli Studi Roma Tre</contributor>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Utrecht University [Utrecht]</contributor>
<contributor>Université des Antilles et de la Guyane (UAG)</contributor>
<contributor>National Technical University of Athens [Athens] (NTUA)</contributor>
<contributor>Institut des Sciences de la Terre de Paris (iSTeP) ; Université Pierre et Marie Curie - Paris 6 (UPMC) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description>International audience</description>
<source>ISSN: 0008-4077</source>
<source>EISSN: 1480-3313</source>
<source>Canadian journal of earth sciences</source>
<publisher>National Research Council Canada</publisher>
<identifier>insu-01271296</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-01271296</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-01271296/document</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-01271296/file/Brun%20etal%20CJES%202016.pdf</identifier>
<source>https://hal-insu.archives-ouvertes.fr/insu-01271296</source>
<source>Canadian journal of earth sciences, National Research Council Canada, 2016, 53 (11), pp.1142-1157. 〈10.1139/cjes-2015-0203〉</source>
<identifier>DOI : 10.1139/cjes-2015-0203</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1139/cjes-2015-0203</relation>
<language>en</language>
<subject>[SDU.STU.TE] Sciences of the Universe [physics]/Earth Sciences/Tectonics</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Back-arc extension in the Aegean, which was driven by slab rollback since 45 Ma, is described here for the first time in two stages. From Middle Eocene to Middle Miocene, deformation was localized leading to i) the exhumation of high-pressure metamorphic rocks to crustal depths, ii) the exhumation of high-temperature metamorphic rocks in core complexes and iii) the deposition of sedimentary basins. Since Middle Miocene, extension distributed over the whole Aegean domain controlled the deposition of onshore and offshore Neogene sedimentary basins. We reconstructed this two-stage evolution in 3D and four steps at Aegean scale by using available ages of metamorphic and sedimentary processes, geometry and kinematics of ductile deformation, paleomagnetic data and available tomographic models. The restoration model shows that the rate of trench retreat was around 0.6 cm/y during the first 30 My and then accelerated up to 3.2 cm/y during the last 15 My. The sharp transition observed in the mode of extension, localized versus distributed, in Middle Miocene correlates with the acceleration of trench retreat and is likely a consequence of the Hellenic slab tearing documented by mantle tomography. The development of large dextral NE-SW strike-slip faults, since Middle Miocene, is illustrated by the 450 Km-long fault zone, offshore from Myrthes to Ikaria and onshore from Izmir to Balikeshir, in western Anatolia. Therefore, the interaction between the Hellenic trench retreat and the westward displacement of Anatolia started in Middle Miocene, almost 10 Ma before the propagation of the North Anatolian Fault in the North Aegean. </description>
<date>2016</date>
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