Transverse englacial debris-rich ice bands at Kviarjokull, southeast Iceland
Thick exposures of debris-rich ice at various Icelandic glaciers are central to the debate over the prevalence of glacial sediment transfer by glaciohydraulic supercooling. We present physical analyses of ice and debris at Kvíárjökull, a temperate glacier in southeast Iceland with a terminal glacier...
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ftuglasgow:oai:eprints.gla.ac.uk:11459 2024-06-02T08:07:04+00:00 Transverse englacial debris-rich ice bands at Kviarjokull, southeast Iceland Swift, D.A. Evans, D.J.A. Fallick, A. 2006 https://eprints.gla.ac.uk/11459/ unknown Elsevier Swift, D.A. <http://eprints.gla.ac.uk/view/author/4625.html>, Evans, D.J.A. and Fallick, A. <http://eprints.gla.ac.uk/view/author/1774.html> (2006) Transverse englacial debris-rich ice bands at Kviarjokull, southeast Iceland. Quaternary Science Reviews <https://eprints.gla.ac.uk/view/journal_volume/Quaternary_Science_Reviews.html>, 25(13-14), pp. 1708-1718. (doi:10.1016/j.quascirev.2006.01.003 <https://doi.org/10.1016/j.quascirev.2006.01.003>) QE Geology Articles PeerReviewed 2006 ftuglasgow https://doi.org/10.1016/j.quascirev.2006.01.003 2024-05-06T15:08:16Z Thick exposures of debris-rich ice at various Icelandic glaciers are central to the debate over the prevalence of glacial sediment transfer by glaciohydraulic supercooling. We present physical analyses of ice and debris at Kvíárjökull, a temperate glacier in southeast Iceland with a terminal glacier-bed overdeepening, where stratified debris-rich ice forms up to metre-thick transverse englacial bands. Our results are not consistent with debris-rich ice formation predominantly by supercooling because: (1) 137Cs was absent from sediment filtered from debris-rich ice; (2) isotopic analysis (δD and δ18O) demonstrated no clear pattern of isotopic enrichment of debris-rich ice with respect to englacial ice; and (3) melt-out debris from debris-rich ice included large striated clasts from both fluvial and basal sources. We support transverse englacial debris-rich ice band formation by the thickening and elevation of basal materials in a region of longitudinally compressive ice flow situated between the reverse slope of the overdeepening and the base of an ice fall. Debris band form and distribution are likely to be controlled by thrusting along transverse englacial foliae associated with the formation of band ogives on the glacier surface. Article in Journal/Newspaper glacier Iceland University of Glasgow: Enlighten - Publications Quaternary Science Reviews 25 13-14 1708 1718 |
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Open Polar |
collection |
University of Glasgow: Enlighten - Publications |
op_collection_id |
ftuglasgow |
language |
unknown |
topic |
QE Geology |
spellingShingle |
QE Geology Swift, D.A. Evans, D.J.A. Fallick, A. Transverse englacial debris-rich ice bands at Kviarjokull, southeast Iceland |
topic_facet |
QE Geology |
description |
Thick exposures of debris-rich ice at various Icelandic glaciers are central to the debate over the prevalence of glacial sediment transfer by glaciohydraulic supercooling. We present physical analyses of ice and debris at Kvíárjökull, a temperate glacier in southeast Iceland with a terminal glacier-bed overdeepening, where stratified debris-rich ice forms up to metre-thick transverse englacial bands. Our results are not consistent with debris-rich ice formation predominantly by supercooling because: (1) 137Cs was absent from sediment filtered from debris-rich ice; (2) isotopic analysis (δD and δ18O) demonstrated no clear pattern of isotopic enrichment of debris-rich ice with respect to englacial ice; and (3) melt-out debris from debris-rich ice included large striated clasts from both fluvial and basal sources. We support transverse englacial debris-rich ice band formation by the thickening and elevation of basal materials in a region of longitudinally compressive ice flow situated between the reverse slope of the overdeepening and the base of an ice fall. Debris band form and distribution are likely to be controlled by thrusting along transverse englacial foliae associated with the formation of band ogives on the glacier surface. |
format |
Article in Journal/Newspaper |
author |
Swift, D.A. Evans, D.J.A. Fallick, A. |
author_facet |
Swift, D.A. Evans, D.J.A. Fallick, A. |
author_sort |
Swift, D.A. |
title |
Transverse englacial debris-rich ice bands at Kviarjokull, southeast Iceland |
title_short |
Transverse englacial debris-rich ice bands at Kviarjokull, southeast Iceland |
title_full |
Transverse englacial debris-rich ice bands at Kviarjokull, southeast Iceland |
title_fullStr |
Transverse englacial debris-rich ice bands at Kviarjokull, southeast Iceland |
title_full_unstemmed |
Transverse englacial debris-rich ice bands at Kviarjokull, southeast Iceland |
title_sort |
transverse englacial debris-rich ice bands at kviarjokull, southeast iceland |
publisher |
Elsevier |
publishDate |
2006 |
url |
https://eprints.gla.ac.uk/11459/ |
genre |
glacier Iceland |
genre_facet |
glacier Iceland |
op_relation |
Swift, D.A. <http://eprints.gla.ac.uk/view/author/4625.html>, Evans, D.J.A. and Fallick, A. <http://eprints.gla.ac.uk/view/author/1774.html> (2006) Transverse englacial debris-rich ice bands at Kviarjokull, southeast Iceland. Quaternary Science Reviews <https://eprints.gla.ac.uk/view/journal_volume/Quaternary_Science_Reviews.html>, 25(13-14), pp. 1708-1718. (doi:10.1016/j.quascirev.2006.01.003 <https://doi.org/10.1016/j.quascirev.2006.01.003>) |
op_doi |
https://doi.org/10.1016/j.quascirev.2006.01.003 |
container_title |
Quaternary Science Reviews |
container_volume |
25 |
container_issue |
13-14 |
container_start_page |
1708 |
op_container_end_page |
1718 |
_version_ |
1800752084042121216 |