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<identifier>oai:HAL:hal-01208098v1</identifier>
<datestamp>2018-01-11</datestamp>
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<title lang=en>Strain partitioning along the anatectic front in the Variscan Montagne Noire massif (Southern French Massif Central)</title>
<creator>RABIN, M.</creator>
<creator>TRAP, P.</creator>
<creator>Carry, N.</creator>
<creator>FREVILLE, K.</creator>
<creator>Cenki-Tok, B.</creator>
<creator>LOBJOIE, C.</creator>
<creator>GONCALVES , P.</creator>
<creator>Marquer, Didier</creator>
<contributor>Laboratoire Chrono-environnement (LCE) ; Université Bourgogne Franche-Comté (UBFC) - Centre National de la Recherche Scientifique (CNRS) - Université de Franche-Comté (UFC)</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: 0278-7407</source>
<source>Tectonics</source>
<publisher>American Geophysical Union (AGU)</publisher>
<identifier>hal-01208098</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01208098</identifier>
<source>https://hal.archives-ouvertes.fr/hal-01208098</source>
<source>Tectonics, American Geophysical Union (AGU), 2015</source>
<language>en</language>
<subject>[SDU.STU] Sciences of the Universe [physics]/Earth Sciences</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>We decipher late-orogenic crustal flow characterized by feedback relations between partialmelting and deformation in the Variscan Montagne Noire gneiss dome. The dome shape and finite strainpattern of the Montagne Noire Axial Zone (MNAZ) result from the superimposition of three deformations(D1, D2 and D3). The early flat-lying S1 foliation is folded by D2 upright ENE-WSW folds and transposed in thecentral and southern part of the MNAZ into steep D2 high-strain zones consistent with D2 NW-SE horizontalshortening, in bulk contractional coaxial deformation regime that progressively evolved to noncoaxial dextraltranspression. The D2 event occurred under metamorphic conditions that culminated at 0.65 ± 0.05 GPa and 720± 20°C. Along the anatectic front S1 and S2 foliations are transposed into a flat-lying S3 foliation with top-to-NEand top-to-SW shearing in the NE and SW dome terminations, respectively. These structures define a D3 transitionzone related to vertical shortening during coaxial thinning with a preferential NE-SW to E-W directedstretching. Depending on structural level, the metamorphic conditions associated with D3 deformation rangefrom partial melting conditions in the dome core to subsolidus conditions above the D3 transition zone. Wesuggest that D2 and D3 deformation events were active at the same time and resulted from strain partitioningon both sides of the anatectic front that may correspond to a major rheological boundary within the crust.</description>
<date>2015</date>
</dc>
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