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dc.contributor.authorSkurtveit, Elin
dc.contributor.authorBallas, G.
dc.contributor.authorFossen, Haakon
dc.contributor.authorTorabi, Anita
dc.contributor.authorSoliva, Roger
dc.contributor.authorPeyret, M.
dc.PublishedSkurtveit E, Ballas, Fossen H, Torabi A, Soliva R, Peyret. Sand textural control on shear-enhanced compaction bands in poorly-lithified sandstone. Journal of geological resource and engineering. 2014;2(2):115-130eng
dc.description.abstractSand textural control on SECB (shear-enhanced compaction band) formation is analyzed combining field observations, detailed material characterization and mechanical testing for poorly lithified sandstone units in Provence (France). Field observations show that SECBs are densely distributed in a coarse-grained unit with moderate porosity (27%), whereas few SECBs are developed within the overlying fine-grained, high-porosity (39%) unit. Results from textural characterization show that the main difference between the two sand units is grain size and sorting, whereas they are similar with respect to composition and grain angularity. Packing density is introduced as an important parameter for comparing the compaction properties independent of the textural variations between the two units. Compaction experiments show a slightly faster compaction of the coarse-grained sand as compared to the fine-grained sand, and more pronounced grain crushing is observed in the coarse-grained unit. The results indicate that the preferential localization of SECBs to the coarse-grained unit is controlled by a slightly denser packing of the coarse-grained material at the time of band formation together with higher stress concentrations on grain contacts. Hence, this study emphasizes that porosity alone is an insufficient parameter for predicting deformation band evolution in sand (stone).en_US
dc.publisherDavid Publishing Companyen_US
dc.rightsAttribution CC BY-NCeng
dc.subjectDeformation bandseng
dc.subjectgrain sizeeng
dc.subjectpacking densityeng
dc.titleSand textural control on shear-enhanced compaction bands in poorly-lithified sandstoneen_US
dc.typePeer reviewed
dc.typeJournal article
dc.rights.holderCopyright 2014 The Author(s)en_US
dc.source.journalJournal of geological resource and engineering
dc.relation.projectUni Research: 207806

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