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Article: A hypothesis on the relative roles of crushing and abrasion in the mechanical genesis of a glacial sediment

TitleA hypothesis on the relative roles of crushing and abrasion in the mechanical genesis of a glacial sediment
Authors
KeywordsAbrasion
Crushing
Modal distribution
Particle size
Particle texture
Issue Date2011
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/enggeo
Citation
Engineering Geology, 2011, v. 120 n. 1-4, p. 1-9 How to Cite?
AbstractRelatively new techniques of optical microscopy and interferometry have been used combined with fractal and modal analyses to study possible deformation mechanisms in glacial sediment from Langjökull, Iceland. Previous studies have shown that the Langjökull till has reached an ultimate grading during deposition and transport. The results presented here add information on the deformation mechanisms that it may have suffered until and after reaching this ultimate grading. The modal and fractal analyses suggest high mechanical weathering. This is supported by the shape and texture of particles determined using the different imaging techniques of laser scanning, optical microscopy combined with three-dimensional image construction, interferometry and scanning electron microscopy. The larger particles have highly weathered surfaces, indicating severe abrasion to their surface during transport. The finer particles show less abrasion stamp and higher angularity. They also bear evidence of relatively fresh fractures. This seems to indicate that as the sediment became better distributed during transport, breakage moved from the larger to the smaller particles, with the larger grains only suffering abrasion. This supports the hypothesis of fractal breakage in this type of soil. © 2011 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/133611
ISSN
2015 Impact Factor: 2.196
2015 SCImago Journal Rankings: 1.810
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorAltuhafi, Fen_HK
dc.contributor.authorBaudet, BAen_HK
dc.date.accessioned2011-05-24T02:11:51Z-
dc.date.available2011-05-24T02:11:51Z-
dc.date.issued2011en_HK
dc.identifier.citationEngineering Geology, 2011, v. 120 n. 1-4, p. 1-9en_HK
dc.identifier.issn0013-7952en_HK
dc.identifier.urihttp://hdl.handle.net/10722/133611-
dc.description.abstractRelatively new techniques of optical microscopy and interferometry have been used combined with fractal and modal analyses to study possible deformation mechanisms in glacial sediment from Langjökull, Iceland. Previous studies have shown that the Langjökull till has reached an ultimate grading during deposition and transport. The results presented here add information on the deformation mechanisms that it may have suffered until and after reaching this ultimate grading. The modal and fractal analyses suggest high mechanical weathering. This is supported by the shape and texture of particles determined using the different imaging techniques of laser scanning, optical microscopy combined with three-dimensional image construction, interferometry and scanning electron microscopy. The larger particles have highly weathered surfaces, indicating severe abrasion to their surface during transport. The finer particles show less abrasion stamp and higher angularity. They also bear evidence of relatively fresh fractures. This seems to indicate that as the sediment became better distributed during transport, breakage moved from the larger to the smaller particles, with the larger grains only suffering abrasion. This supports the hypothesis of fractal breakage in this type of soil. © 2011 Elsevier B.V.en_HK
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/enggeoen_HK
dc.relation.ispartofEngineering Geologyen_HK
dc.subjectAbrasionen_HK
dc.subjectCrushingen_HK
dc.subjectModal distributionen_HK
dc.subjectParticle sizeen_HK
dc.subjectParticle textureen_HK
dc.titleA hypothesis on the relative roles of crushing and abrasion in the mechanical genesis of a glacial sedimenten_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0013-7952&volume=120&issue=1-4&spage=1&epage=9&date=2011&atitle=A+hypothesis+on+the+relative+roles+of+crushing+and+abrasion+in+the+mechanical+genesis+of+a+glacial+sediment-
dc.identifier.emailBaudet, BA:baudet@hku.hken_HK
dc.identifier.authorityBaudet, BA=rp01303en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.enggeo.2011.03.002en_HK
dc.identifier.scopuseid_2-s2.0-79956350196en_HK
dc.identifier.hkuros185245en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79956350196&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume120en_HK
dc.identifier.issue1-4en_HK
dc.identifier.spage1en_HK
dc.identifier.epage9en_HK
dc.identifier.eissn1872-6917-
dc.identifier.isiWOS:000291907700001-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridAltuhafi, F=25637246000en_HK
dc.identifier.scopusauthoridBaudet, BA=15841467600en_HK
dc.identifier.citeulike9190532-

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