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<identifier>oai:HAL:hal-00750341v1</identifier>
<datestamp>2018-01-11</datestamp>
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<publisher>HAL CCSD</publisher>
<title lang=en>Propagation energies inferred from deformation bands in sandstone</title>
<creator>Schultz, R. A.</creator>
<creator>Soliva, Roger</creator>
<contributor>ConocoPhillips Company [Houston]</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: 0376-9429</source>
<source>EISSN: 1573-2673</source>
<source>International Journal of Fracture</source>
<publisher>Springer Verlag</publisher>
<identifier>hal-00750341</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00750341</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00750341</source>
<source>International Journal of Fracture, Springer Verlag, 2012, 176 (2), pp.135-149. 〈10.1007/s10704-012-9730-2〉</source>
<identifier>DOI : 10.1007/s10704-012-9730-2</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1007/s10704-012-9730-2</relation>
<language>en</language>
<subject lang=en>Deformation band</subject>
<subject lang=en>Compaction band</subject>
<subject lang=en>Weak discontinuity</subject>
<subject lang=en>Strain energy release rate</subject>
<subject lang=en>J-integral</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>Propagation energies for five examples of deformation bands in porous sandstones from four field sites in Nevada, Utah, and France were calculated by using the J-integral approach. Pure compaction bands that accommodate primarily closing displacements from the Valley of Fire (Nevada) site have a closing-mode band propagation energy of J I = 5.5 ± 1.6 kJ/m2. Shear-enhanced compaction bands having subequal amounts of normal (closing) and shear strains across them from the same site have propagation energies of J I = 6.11 ± 1.8 kJ/m2 and J II = 1.52 ± 0.5 kJ/m2 for closing and shearing modes respectively. Closing- and shearing-mode band propagation energies for shear-enhanced compaction bands from the Buckskin Gulch (Utah) site, 5.63 ± 1.7 and 1.91 ± 0.57 kJ/m2 and the Uchaux (France) site, 11.0 ± 3.3 and 2.35 ± 0.7 kJ/m2 respectively are comparable to the values for similar structures from the Valley of Fire site. Cataclastic deformation bands at the Orange (France) site accommodate significantly larger values of shear offset than do shear-enhanced compaction bands, with a ratio of shear to closing offset that exceeds 7. The calculated closing- and shearing-mode propagation energies for these shear bands, 17.8 ± 5.4 and 3.3 ± 1.0 kJ/m2 respectively are comparable to those for pure or shear-enhanced compaction bands deformed at approximately the same depth of burial. Strain softening of cataclastic compactional shear bands implies unstable shearing, whereas stable and perhaps strain-hardening shearing may be inferred for shear-enhanced compaction bands. Displacement-length scaling relations for shear-enhanced compaction bands of the form D∝L are consistent with the results and with suggestions of band thickening during growth obtained from bifurcation analyses and with field observations of shear zones in porous host rock.</description>
<date>2012-08</date>
</dc>
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