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<datestamp>2018-01-11</datestamp>
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<title lang=en>Syn-convergence flow inside and at the margin of orogenic plateaus: Lithospheric-scale experimental approach</title>
<creator>Bajolet, Flora</creator>
<creator>Chardon, Dominique</creator>
<creator>Martinod, Joseph</creator>
<creator>Gapais, Denis</creator>
<creator>Kermarrec, Jean-Jacques</creator>
<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>Géosciences Environnement Toulouse (GET) ; Institut de Recherche pour le Développement (IRD) - Université Paul Sabatier - Toulouse 3 (UPS) - Observatoire Midi-Pyrénées (OMP) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Institut des Sciences de la Terre (ISTerre) ; Université Joseph Fourier - Grenoble 1 (UJF) - Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR) - Institut national des sciences de l'Univers (INSU - CNRS) - Institut de recherche pour le développement [IRD] : UR219 - PRES Université de Grenoble - Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<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>
<description>International audience</description>
<source>ISSN: 0148-0227</source>
<source>EISSN: 2156-2202</source>
<source>Journal of Geophysical Research</source>
<publisher>American Geophysical Union</publisher>
<identifier>hal-01229107</identifier>
<identifier>https://hal-univ-rennes1.archives-ouvertes.fr/hal-01229107</identifier>
<identifier>https://hal-univ-rennes1.archives-ouvertes.fr/hal-01229107/document</identifier>
<identifier>https://hal-univ-rennes1.archives-ouvertes.fr/hal-01229107/file/2015JB012110_revised.pdf</identifier>
<identifier>https://hal-univ-rennes1.archives-ouvertes.fr/hal-01229107/file/SupplementaryMaterial_final.pdf</identifier>
<source>https://hal-univ-rennes1.archives-ouvertes.fr/hal-01229107</source>
<source>Journal of Geophysical Research, American Geophysical Union, 2015, 120 (9), pp.6634-6657. 〈10.1002/2015JB012110〉</source>
<identifier>DOI : 10.1002/2015JB012110</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1002/2015JB012110</relation>
<language>en</language>
<subject lang=en>orogenic plateau</subject>
<subject lang=en>hot orogen</subject>
<subject lang=en>crustal flow</subject>
<subject lang=en>analog modeling</subject>
<subject lang=en>lateral escape</subject>
<subject lang=en>extrusion tectonics</subject>
<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>This study investigates three-dimensional flow modes of orogenic plateaus by means of physical modeling. Experiments consist of shortening two contiguous lithospheres of contrasting strength, one being a weak plateau-type lithosphere and the other a strong craton-type lithosphere. The lateral boundaries are either totally confined or allow escape toward a lateral foreland on one side. Two synconvergence flow regimes are distinguished, which are governed by the balance between the gravity potential and the strength of the plateau crust and the resistance of its lateral foreland. The first regime implies transversal (orogen-normal) injection of plateau lower crust into the collision zone as a result of confinement of the plateau by an increasingly stiffer lateral boundary. As a precursor mechanism to channel flow, transversal injection responds to downward thickening of the plateau crust that is forcedly extruded into the orogenic wedge. The second regime is that of collapse-driven lateral escape of the plateau. This regime is established after a threshold is attained in the interplate coupling in the collision zone, which allows the gravity potential of the plateau to overcome the resistance of its lateral boundary. Under the collapse-driven escape regime (orogen parallel), such as that governing Tibet during the last 13 Ma, most of the convergence in the plateau and the top and rear of the collisional wedge is transformed into lateral flow and extension.</description>
<date>2015-09</date>
</dc>
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