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<datestamp>2018-01-11</datestamp>
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<title lang=en>Asymmetric vs. symmetric deep lithospheric architecture of intra-plate continental orogens</title>
<creator>Calignano, Elisa</creator>
<creator>Sokoutis, Dimitrios</creator>
<creator>Willingshofer, Ernst</creator>
<creator>GUEYDAN, Frederic</creator>
<creator>Cloetingh, Sierd</creator>
<contributor>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>
<contributor>Dynamique de la Lithosphere ; 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) - 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: 0012-821X</source>
<source>Earth and Planetary Science Letters</source>
<publisher>Elsevier</publisher>
<identifier>hal-01243577</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01243577</identifier>
<source>https://hal.archives-ouvertes.fr/hal-01243577</source>
<source>Earth and Planetary Science Letters, Elsevier, 2015, 424, pp.38-50. 〈10.1016/j.epsl.2015.05.022〉</source>
<identifier>DOI : 10.1016/j.epsl.2015.05.022</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2015.05.022</relation>
<language>en</language>
<subject lang=en>intra-plate deformation</subject>
<subject lang=en>strain localization</subject>
<subject lang=en>analogue modelling</subject>
<subject lang=en>Pyrenees</subject>
<subject lang=en>compression</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>The initiation and subsequent evolution of intra-plate orogens, resulting from continental plate interior deformation due to transmission of stresses over large distances from the active plate boundaries, is controlled by lateral and vertical strength contrasts in the lithosphere. We present lithospheric-scale analogue models combining 1) lateral strength variations in the continental lithosphere, and 2) different vertical rheological stratifications. The experimental continental lithosphere has a four-layer brittle–ductile rheological stratification. Lateral heterogeneity is implemented in all models by increased crustal strength in a central narrow block. The main investigated parameters are strain rate and strength of the lithospheric mantle, both playing an important role in crust–mantle coupling. The experiments show that the presence of a strong crustal domain is effective in localizing deformation along its boundaries. After deformation is localized, the evolution of the orogenic system is governed by the mechanical properties of the lithosphere such that the final geometry of the intra-plate mountain depends on the interplay between crust–mantle coupling and folding versus fracturing of the lithospheric mantle. Underthrusting is the main deformation mode in case of high convergence velocity and/or thick brittle mantle with a final asymmetric architecture of the deep lithosphere. In contrast, lithospheric folding is dominant in case of low convergence velocity and low strength brittle mantle, leading to the development of a symmetric lithospheric root. The presented analogue modelling results provide novel insights for 1) strain localization and 2) the development of the asymmetric architecture of the Pyrenees.</description>
<date>2015-08-15</date>
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