Stratigraphy and glaciotectonics structures of a relict deforming bed of permafrost at the northwestern margin of the Laurentide ice sheet, Tuktoyaktuk Coastlands, Canada
The upper 5-20 m of ice-rich permafrost at three sites overridden by the northwest margin of the Laurentide ice sheet in the Tuktoyaktuk Coastlands, western Arctic Canada, comprise massive ice beneath ice-rich diamicton or sandy silt. The diamicton and silt contain (1) truncated ice blocks up to 15...
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2004
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ftsouthampton:oai:eprints.soton.ac.uk:55432 2023-07-30T04:01:44+02:00 Stratigraphy and glaciotectonics structures of a relict deforming bed of permafrost at the northwestern margin of the Laurentide ice sheet, Tuktoyaktuk Coastlands, Canada Murton, Julian B. Waller, Richard I. Hart, Jane K. Whiteman, Colin A. Pollard, Wayne H. Clark, Ian D. 2004-06 https://eprints.soton.ac.uk/55432/ unknown Murton, Julian B., Waller, Richard I., Hart, Jane K., Whiteman, Colin A., Pollard, Wayne H. and Clark, Ian D. (2004) Stratigraphy and glaciotectonics structures of a relict deforming bed of permafrost at the northwestern margin of the Laurentide ice sheet, Tuktoyaktuk Coastlands, Canada. Journal of Glaciology, 50 (170), 399-412. (doi:10.3189/172756504781829927 <http://dx.doi.org/10.3189/172756504781829927>). Article PeerReviewed 2004 ftsouthampton https://doi.org/10.3189/172756504781829927 2023-07-09T20:58:11Z The upper 5-20 m of ice-rich permafrost at three sites overridden by the northwest margin of the Laurentide ice sheet in the Tuktoyaktuk Coastlands, western Arctic Canada, comprise massive ice beneath ice-rich diamicton or sandy silt. The diamicton and silt contain (1) truncated ice blocks up to 15 m long, (2) sand lenses and layers, (3) ice veins dipping at 20-30°, (4) ice lenses adjacent and parallel to sedimentary contacts, and (5) ice wedges. The massive ice is interpreted as intrasedimental or buried basal glacier ice, and the diamicton and silt as glacitectonite that has never thawed. Deformation of frozen ground was mainly ductile in character. Deformation was accompanied by sub-marginal erosion of permafrost, which formed an angular unconformity along the top of the massive ice and supplied ice clasts and sand bodies to the overlying glacitectonite. After deformation and erosion ceased, postglacial segregated ice and ice-wedge ice developed within the deformed permafrost. Article in Journal/Newspaper Arctic glacier* Ice Ice Sheet Journal of Glaciology permafrost wedge* University of Southampton: e-Prints Soton Arctic Canada Tuktoyaktuk ENVELOPE(-133.006,-133.006,69.425,69.425) Journal of Glaciology 50 170 399 412 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
unknown |
description |
The upper 5-20 m of ice-rich permafrost at three sites overridden by the northwest margin of the Laurentide ice sheet in the Tuktoyaktuk Coastlands, western Arctic Canada, comprise massive ice beneath ice-rich diamicton or sandy silt. The diamicton and silt contain (1) truncated ice blocks up to 15 m long, (2) sand lenses and layers, (3) ice veins dipping at 20-30°, (4) ice lenses adjacent and parallel to sedimentary contacts, and (5) ice wedges. The massive ice is interpreted as intrasedimental or buried basal glacier ice, and the diamicton and silt as glacitectonite that has never thawed. Deformation of frozen ground was mainly ductile in character. Deformation was accompanied by sub-marginal erosion of permafrost, which formed an angular unconformity along the top of the massive ice and supplied ice clasts and sand bodies to the overlying glacitectonite. After deformation and erosion ceased, postglacial segregated ice and ice-wedge ice developed within the deformed permafrost. |
format |
Article in Journal/Newspaper |
author |
Murton, Julian B. Waller, Richard I. Hart, Jane K. Whiteman, Colin A. Pollard, Wayne H. Clark, Ian D. |
spellingShingle |
Murton, Julian B. Waller, Richard I. Hart, Jane K. Whiteman, Colin A. Pollard, Wayne H. Clark, Ian D. Stratigraphy and glaciotectonics structures of a relict deforming bed of permafrost at the northwestern margin of the Laurentide ice sheet, Tuktoyaktuk Coastlands, Canada |
author_facet |
Murton, Julian B. Waller, Richard I. Hart, Jane K. Whiteman, Colin A. Pollard, Wayne H. Clark, Ian D. |
author_sort |
Murton, Julian B. |
title |
Stratigraphy and glaciotectonics structures of a relict deforming bed of permafrost at the northwestern margin of the Laurentide ice sheet, Tuktoyaktuk Coastlands, Canada |
title_short |
Stratigraphy and glaciotectonics structures of a relict deforming bed of permafrost at the northwestern margin of the Laurentide ice sheet, Tuktoyaktuk Coastlands, Canada |
title_full |
Stratigraphy and glaciotectonics structures of a relict deforming bed of permafrost at the northwestern margin of the Laurentide ice sheet, Tuktoyaktuk Coastlands, Canada |
title_fullStr |
Stratigraphy and glaciotectonics structures of a relict deforming bed of permafrost at the northwestern margin of the Laurentide ice sheet, Tuktoyaktuk Coastlands, Canada |
title_full_unstemmed |
Stratigraphy and glaciotectonics structures of a relict deforming bed of permafrost at the northwestern margin of the Laurentide ice sheet, Tuktoyaktuk Coastlands, Canada |
title_sort |
stratigraphy and glaciotectonics structures of a relict deforming bed of permafrost at the northwestern margin of the laurentide ice sheet, tuktoyaktuk coastlands, canada |
publishDate |
2004 |
url |
https://eprints.soton.ac.uk/55432/ |
long_lat |
ENVELOPE(-133.006,-133.006,69.425,69.425) |
geographic |
Arctic Canada Tuktoyaktuk |
geographic_facet |
Arctic Canada Tuktoyaktuk |
genre |
Arctic glacier* Ice Ice Sheet Journal of Glaciology permafrost wedge* |
genre_facet |
Arctic glacier* Ice Ice Sheet Journal of Glaciology permafrost wedge* |
op_relation |
Murton, Julian B., Waller, Richard I., Hart, Jane K., Whiteman, Colin A., Pollard, Wayne H. and Clark, Ian D. (2004) Stratigraphy and glaciotectonics structures of a relict deforming bed of permafrost at the northwestern margin of the Laurentide ice sheet, Tuktoyaktuk Coastlands, Canada. Journal of Glaciology, 50 (170), 399-412. (doi:10.3189/172756504781829927 <http://dx.doi.org/10.3189/172756504781829927>). |
op_doi |
https://doi.org/10.3189/172756504781829927 |
container_title |
Journal of Glaciology |
container_volume |
50 |
container_issue |
170 |
container_start_page |
399 |
op_container_end_page |
412 |
_version_ |
1772812499338395648 |