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<title lang=en>Shear-enhanced compaction bands formed at shallow burial conditions; implications for fluid flow (Provence, France)</title>
<creator>BALLAS, Gregory</creator>
<creator>Soliva, Roger</creator>
<creator>Sizun, Jean-Pierre</creator>
<creator>Fossen, Haakon</creator>
<creator>Benedicto, Antonio</creator>
<creator>Skurtveit, Elin</creator>
<contributor>Bassins ; 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>
<contributor>Laboratoire Chrono-environnement (LCE) ; Université Bourgogne Franche-Comté (UBFC) - Centre National de la Recherche Scientifique (CNRS) - Université de Franche-Comté (UFC)</contributor>
<contributor>University of Bergen (UIB)</contributor>
<contributor>AREVA TD ; AREVA TD</contributor>
<description>International audience</description>
<source>ISSN: 0191-8141</source>
<source>Journal of Structural Geology</source>
<publisher>Elsevier</publisher>
<identifier>hal-00807309</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00807309</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00807309</source>
<source>Journal of Structural Geology, Elsevier, 2013, 47, pp.3-15. 〈10.1016/j.jsg.2012.11.008〉</source>
<identifier>DOI : 10.1016/j.jsg.2012.11.008</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsg.2012.11.008</relation>
<language>en</language>
<subject lang=en>Compaction band</subject>
<subject lang=en>Deformation band</subject>
<subject lang=en>Porous sandstone</subject>
<subject lang=en>Permeability</subject>
<subject lang=en>Fluid flow Shallow burial conditions</subject>
<subject>[SDU.STU.GP] Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]</subject>
<subject>[PHYS.PHYS.PHYS-GEO-PH] Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph]</subject>
<subject>[SDE.MCG] Environmental Sciences/Global Changes</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Field observations of highly porous and permeable sandstone in the Orange area (S-E Basin, France) show that networks of shear-enhanced compaction bands can form in a contractional regime at burial depths of about 400 m ± 100 m. These bands show equal compaction and shear displacements, are organized in conjugate and densely distributed networks, and are restricted to the coarse-grained (mean grain diameter of 0.6 ± 0.1 mm) and less porous (porosity of 26 ± 2%) sand layers. The bands are crush microbreccia with limited grain comminution and high grain microfracture density. They show reductions of permeability (mD) ranging from 0 to little more than 1 order of magnitude. They show no control on the alteration products related to meteoric water flow, which suggests that these shear-enhanced compaction bands have no or only negligible influence on subsurface fluid flow. Their selective occurrence and small (20%) reduction in transmissibility in densely populated layers prevented them from compartmentalizing the sandstone reservoirs. A comparison with compaction-band populations in the Navajo and Aztec sandtsones (western U.S.) emphasizes the role of burial depth and the presence of chemical compaction processes for the sealing potential of deformation bands.</description>
<date>2013-02</date>
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