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<title lang=en>Shear band formation and strain localization on a regional scale: Evidence from anisotropic rocks below a major detachment (Betic Cordilleras, Spain)</title>
<creator>Agard, Philippe</creator>
<creator>Augier, Romain</creator>
<creator>Monié, Patrick</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>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>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: 0191-8141</source>
<source>Journal of Structural Geology</source>
<publisher>Elsevier</publisher>
<identifier>insu-00545043</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-00545043</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-00545043/document</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-00545043/file/JSGagardetal2.pdf</identifier>
<source>https://hal-insu.archives-ouvertes.fr/insu-00545043</source>
<source>Journal of Structural Geology, Elsevier, 2011, 33, pp.114-131. 〈10.1016/j.jsg.2010.11.011〉</source>
<identifier>DOI : 10.1016/j.jsg.2010.11.011</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsg.2010.11.011</relation>
<language>en</language>
<subject lang=en>Shear bands</subject>
<subject lang=en>Strain gradient</subject>
<subject lang=en>Progressive deformation</subject>
<subject lang=en>Cleavage</subject>
<subject lang=en>Betics</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>Regional-scale deformation taking place in a strongly anisotropic, yet homogeneous metapelitic protolith during an apparently single tectonic event was systematically investigated as a function of the distance to the main tectonic contact (i.e., the Filabres shear zone, a major detachment in the Betic Cordilleras, Spain). The density of C3' shear bands (or extensional crenulation cleavage) reworking the earlier S2 schistosity increases exponentially towards the contact, in parallel with the decrease in the size of the shear domains. Systematic variations in angles and shape ratios are also reported. Deformation and age patterns, however, suggest that this spectacular trend at least partly results from a progressive localization of the deformation through time. This fossilized shear strain gradient was thus produced somewhat diachronously. Such shear strain patterns nevertheless provide a mean to constrain the rheological properties for such weak lithologies and a mean to better understand crustal deformation.</description>
<date>2011</date>
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