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<title lang=en>3D geometrical modelling of post-foliation deformations in metamorphic terrains (Syros, Cyclades, Greece)</title>
<creator>Philippon, Melody</creator>
<creator>Le Carlier De Veslud, Christian</creator>
<creator>GUEYDAN, Frédéric</creator>
<creator>Brun, Jean-Pierre</creator>
<creator>Caumon, Guillaume</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 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>GeoRessources ; Institut national des sciences de l'Univers (INSU - CNRS) - Centre de recherches sur la géologie des matières premières minérales et énergétiques (CREGU) - Université de Lorraine (UL) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description>International audience</description>
<source>ISSN: 0191-8141</source>
<source>Journal of Structural Geology</source>
<publisher>Elsevier</publisher>
<identifier>insu-01188400</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-01188400</identifier>
<source>https://hal-insu.archives-ouvertes.fr/insu-01188400</source>
<source>Journal of Structural Geology, Elsevier, 2015, 78, pp.134-148. 〈10.1016/j.jsg.2015.07.002 〉</source>
<identifier>DOI : 10.1016/j.jsg.2015.07.002 </identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsg.2015.07.002 </relation>
<language>en</language>
<subject lang=en> Post-foliation deformations</subject>
<subject lang=en>3D geometrical modeling</subject>
<subject lang=en> HP metamorphic terrains</subject>
<subject lang=en> Cycladic blueschists unit</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>Superposed to ductile syn-metamorphic deformations, post-foliation deformations affect metamorphic units during their exhumation. Understanding the role of such deformations in the structuration of metamorphic units is key for understanding the tectonic evolution of convergence zones. We characterize post-foliations deformations using 3D modelling which is a first-order tool to describe complex geological structures, but a challenging task where based only on surface data. We propose a modelling procedure that combines fast draft models (interpolation of orientation data), with more complex ones where the structural context is better understood (implicit modelling), allowing us to build a 3D geometrical model of Syros Island blueschists (Cyclades), based on field data. With our approach, the 3D model is able to capture the complex present-day geometry of the island, mainly controlled by the su-perposition of three types of post-metamorphic deformations affecting the original metamorphic pile: i) a top-to-South ramp-flat extensional system that dominates the overall island structure, ii) large-scale folding of the metamorphic units associated with ramp-flat extensional system, and iii) steeply-dipping normal faults trending dominantly NNW-SSE and EW. The 3D surfaces produced by this method match outcrop data, are geologically consistent, and provide reasonable estimates of geological structures in poorly constrained areas.</description>
<date>2015</date>
</dc>
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