ORIGINAL PAPER Rotating micro-structures in Antarctic cold basal ice: implications for glacier flow and its interpretation
Abstract Structural analyses were conducted in the basal zone of an Antarctic glacier. The studied basal ice sequence was retrieved from a 20-m-long subglacial tunnel dug at the margin of the glacier and is at the temperature of-17C. For the first time, rotating clast systems embedded within debris-...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.497.5805 2023-05-15T14:05:28+02:00 ORIGINAL PAPER Rotating micro-structures in Antarctic cold basal ice: implications for glacier flow and its interpretation Reginald D. Lorrain The Pennsylvania State University CiteSeerX Archives 2008 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.497.5805 http://glaciers.otago.ac.nz/__data/assets/pdf_file/0004/4990/Samyn_et_al_2009.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.497.5805 http://glaciers.otago.ac.nz/__data/assets/pdf_file/0004/4990/Samyn_et_al_2009.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://glaciers.otago.ac.nz/__data/assets/pdf_file/0004/4990/Samyn_et_al_2009.pdf text 2008 ftciteseerx 2016-01-08T08:51:45Z Abstract Structural analyses were conducted in the basal zone of an Antarctic glacier. The studied basal ice sequence was retrieved from a 20-m-long subglacial tunnel dug at the margin of the glacier and is at the temperature of-17C. For the first time, rotating clast systems embedded within debris-rich ice were thin-sectioned using specially designed cutting techniques. The observed structures reflect the occurrence of pervasive shearing at the base of the glacier, and can be used as shear sense indicators. In addition, some of these structures provide evidence for the presence of thin liquid films at the time of formation despite the marked freezing temperature of the ice. It is showed here that cautious analysis of deformation struc-tures present in debris-bearing ice may bring insights not only into the flow dynamics of the embedding matrix, but also into the behaviour of the interstitial fluid network at the base of cold glaciers and ice sheets. Text Antarc* Antarctic Unknown Antarctic |
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ftciteseerx |
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English |
description |
Abstract Structural analyses were conducted in the basal zone of an Antarctic glacier. The studied basal ice sequence was retrieved from a 20-m-long subglacial tunnel dug at the margin of the glacier and is at the temperature of-17C. For the first time, rotating clast systems embedded within debris-rich ice were thin-sectioned using specially designed cutting techniques. The observed structures reflect the occurrence of pervasive shearing at the base of the glacier, and can be used as shear sense indicators. In addition, some of these structures provide evidence for the presence of thin liquid films at the time of formation despite the marked freezing temperature of the ice. It is showed here that cautious analysis of deformation struc-tures present in debris-bearing ice may bring insights not only into the flow dynamics of the embedding matrix, but also into the behaviour of the interstitial fluid network at the base of cold glaciers and ice sheets. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Reginald D. Lorrain |
spellingShingle |
Reginald D. Lorrain ORIGINAL PAPER Rotating micro-structures in Antarctic cold basal ice: implications for glacier flow and its interpretation |
author_facet |
Reginald D. Lorrain |
author_sort |
Reginald D. Lorrain |
title |
ORIGINAL PAPER Rotating micro-structures in Antarctic cold basal ice: implications for glacier flow and its interpretation |
title_short |
ORIGINAL PAPER Rotating micro-structures in Antarctic cold basal ice: implications for glacier flow and its interpretation |
title_full |
ORIGINAL PAPER Rotating micro-structures in Antarctic cold basal ice: implications for glacier flow and its interpretation |
title_fullStr |
ORIGINAL PAPER Rotating micro-structures in Antarctic cold basal ice: implications for glacier flow and its interpretation |
title_full_unstemmed |
ORIGINAL PAPER Rotating micro-structures in Antarctic cold basal ice: implications for glacier flow and its interpretation |
title_sort |
original paper rotating micro-structures in antarctic cold basal ice: implications for glacier flow and its interpretation |
publishDate |
2008 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.497.5805 http://glaciers.otago.ac.nz/__data/assets/pdf_file/0004/4990/Samyn_et_al_2009.pdf |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
http://glaciers.otago.ac.nz/__data/assets/pdf_file/0004/4990/Samyn_et_al_2009.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.497.5805 http://glaciers.otago.ac.nz/__data/assets/pdf_file/0004/4990/Samyn_et_al_2009.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766277378990931968 |