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<title lang=en>Zagros orogeny: a subduction-dominated process</title>
<creator>Agard, Philippe</creator>
<creator>Omrani, Jafar</creator>
<creator>Jolivet, Laurent</creator>
<creator>Whitechurch, Hubert</creator>
<creator>Vrielynck, Bruno</creator>
<creator>Spakman, Wim</creator>
<creator>Monié, Patrick</creator>
<creator>Meyer, Bertrand</creator>
<creator>Wortel, R.</creator>
<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>
<contributor>Geological Survey of Iran ; Geological Survey of Iran</contributor>
<contributor>Institut des Sciences de la Terre d'Orléans (ISTO) ; Institut national des sciences de l'Univers (INSU - CNRS) - Université d'Orléans (UO) - Université François Rabelais - Tours - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Ecole et Observatoire des sciences de la terre de Strasbourg (EOSTS) ; Institut national des sciences de l'Univers (INSU - CNRS) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Vening Meinesz Research School of Geodynamics ; Utrecht University [Utrecht]</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>
<description>International audience</description>
<source>ISSN: 0016-7568</source>
<source>EISSN: 1469-5081</source>
<source>Geological Magazine</source>
<publisher>Cambridge University Press (CUP)</publisher>
<identifier>insu-00616582</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-00616582</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-00616582/document</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-00616582/file/692.full.pdf</identifier>
<source>https://hal-insu.archives-ouvertes.fr/insu-00616582</source>
<source>Geological Magazine, Cambridge University Press (CUP), 2011, 148 (5-6), pp.692-725. 〈10.1017/S001675681100046X〉</source>
<identifier>DOI : 10.1017/S001675681100046X</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1017/S001675681100046X</relation>
<language>en</language>
<subject lang=en>obduction</subject>
<subject lang=en>slab break-off</subject>
<subject lang=en>arc magmatism</subject>
<subject lang=en>subduction</subject>
<subject lang=en>Zagros</subject>
<subject lang=en>geodynamics</subject>
<subject lang=en>orogeny</subject>
<subject>[SDU.STU.TE] Sciences of the Universe [physics]/Earth Sciences/Tectonics</subject>
<subject>[SDE.MCG] Environmental Sciences/Global Changes</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>This paper presents a synthetic view of the geodynamic evolution of the Zagros orogen within the frame of the Arabia-Eurasia collision. The Zagros orogen and the Iranian plateau preserve a record of the long-standing convergence history between Eurasia and Arabia across the Neo-Tethys, from subduction/obduction processes to present-day collision (from ~ 150 to 0 Ma). We herein combine the results obtained on several geodynamic issues, namely the location of the oceanic suture zone, the age of oceanic closure and collision, the magmatic and geochemical evolution of the Eurasian upper plate during convergence (as testified by the successive Sanandaj-Sirjan, Kermanshah and Urumieh-Dokhtar magmatic arcs), the P-T-t history of the few Zagros blueschists, the convergence characteristics across the Neo-Tethys (kinematic velocities, tomographic constraints, subduction zones and obduction processes), together with a survey of recent results gathered by others. We provide lithospheric-scale reconstructions of the Zagros orogen from ~ 150 to 0 Ma across two SW-NE transects. The evolution of the Zagros orogen is also compared to those of the nearby Turkish and Himalayan orogens. In our geotectonic scenario for the Zagros convergence, we outline three main periods/regimes: (1) the Mid to Late Cretaceous (115-85 Ma) corresponds to a distinctive period of perturbation of subduction processes and interplate mechanical coupling marked by blueschist exhumation and upper-plate fragmentation, (2) the Paleocene-Eocene (60-40 Ma) witnesses slab break-off, major shifts in arc magmatism and distributed extension within the upper plate, and (3) from the Oligocene onwards (~ 30-0 Ma), collision develops with a progressive SW migration of deformation and topographic build-up (Sanandaj-Sirjan Zone: 20-15 Ma, High Zagros: ~12-8 Ma; Simply Folded Belt: 5-0 Ma) and with partial slab tear at depths (~10 Ma to present). Our reconstructions underline the key role played by subduction throughout the whole convergence history. We finally stress that such a long-lasting subduction system with changing boundary conditions also makes the Zagros orogen an ideal natural laboratory for subduction processes.</description>
<date>2011</date>
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