A hypothesis on the relative roles of crushing and abrasion in the mechanical genesis of a glacial sediment
Relatively 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 durin...
Published in: | Engineering Geology |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/enggeo
2011
|
Subjects: | |
Online Access: | https://doi.org/10.1016/j.enggeo.2011.03.002 http://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 http://hdl.handle.net/10722/133611 |
id |
ftunivhongkonghu:oai:hub.hku.hk:10722/133611 |
---|---|
record_format |
openpolar |
spelling |
ftunivhongkonghu:oai:hub.hku.hk:10722/133611 2023-05-15T16:50:25+02:00 A hypothesis on the relative roles of crushing and abrasion in the mechanical genesis of a glacial sediment Altuhafi, F Baudet, BA 2011 https://doi.org/10.1016/j.enggeo.2011.03.002 http://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 http://hdl.handle.net/10722/133611 eng eng Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/enggeo Netherlands Engineering Geology http://www.scopus.com/mlt/select.url?eid=2-s2.0-79956350196&selection=ref&src=s&origin=recordpage Engineering Geology, 2011, v. 120 n. 1-4, p. 1-9 9190532 doi:10.1016/j.enggeo.2011.03.002 1872-6917 9 185245 WOS:000291907700001 0013-7952 1-4 http://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 eid_2-s2.0-79956350196 1 http://hdl.handle.net/10722/133611 120 Particle texture Particle size Modal distribution Crushing Abrasion Article 2011 ftunivhongkonghu https://doi.org/10.1016/j.enggeo.2011.03.002 2023-01-14T15:36:54Z Relatively 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. link_to_subscribed_fulltext Article in Journal/Newspaper Iceland Langjökull University of Hong Kong: HKU Scholars Hub Langjökull ENVELOPE(-20.145,-20.145,64.654,64.654) Engineering Geology 120 1-4 1 9 |
institution |
Open Polar |
collection |
University of Hong Kong: HKU Scholars Hub |
op_collection_id |
ftunivhongkonghu |
language |
English |
topic |
Particle texture Particle size Modal distribution Crushing Abrasion |
spellingShingle |
Particle texture Particle size Modal distribution Crushing Abrasion Altuhafi, F Baudet, BA A hypothesis on the relative roles of crushing and abrasion in the mechanical genesis of a glacial sediment |
topic_facet |
Particle texture Particle size Modal distribution Crushing Abrasion |
description |
Relatively 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. link_to_subscribed_fulltext |
format |
Article in Journal/Newspaper |
author |
Altuhafi, F Baudet, BA |
author_facet |
Altuhafi, F Baudet, BA |
author_sort |
Altuhafi, F |
title |
A hypothesis on the relative roles of crushing and abrasion in the mechanical genesis of a glacial sediment |
title_short |
A hypothesis on the relative roles of crushing and abrasion in the mechanical genesis of a glacial sediment |
title_full |
A hypothesis on the relative roles of crushing and abrasion in the mechanical genesis of a glacial sediment |
title_fullStr |
A hypothesis on the relative roles of crushing and abrasion in the mechanical genesis of a glacial sediment |
title_full_unstemmed |
A hypothesis on the relative roles of crushing and abrasion in the mechanical genesis of a glacial sediment |
title_sort |
hypothesis on the relative roles of crushing and abrasion in the mechanical genesis of a glacial sediment |
publisher |
Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/enggeo |
publishDate |
2011 |
url |
https://doi.org/10.1016/j.enggeo.2011.03.002 http://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 http://hdl.handle.net/10722/133611 |
long_lat |
ENVELOPE(-20.145,-20.145,64.654,64.654) |
geographic |
Langjökull |
geographic_facet |
Langjökull |
genre |
Iceland Langjökull |
genre_facet |
Iceland Langjökull |
op_relation |
Engineering Geology http://www.scopus.com/mlt/select.url?eid=2-s2.0-79956350196&selection=ref&src=s&origin=recordpage Engineering Geology, 2011, v. 120 n. 1-4, p. 1-9 9190532 doi:10.1016/j.enggeo.2011.03.002 1872-6917 9 185245 WOS:000291907700001 0013-7952 1-4 http://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 eid_2-s2.0-79956350196 1 http://hdl.handle.net/10722/133611 120 |
op_doi |
https://doi.org/10.1016/j.enggeo.2011.03.002 |
container_title |
Engineering Geology |
container_volume |
120 |
container_issue |
1-4 |
container_start_page |
1 |
op_container_end_page |
9 |
_version_ |
1766040575301124096 |