A new map of glacigenic features and glacial landsystems in central mainland Nunavut, Canada
A new digital map of glacial geomorphic features and interpreted glacial landsystems was produced for an area covering ~415 000 km 2 in the Keewatin Sector of the Laurentide Ice Sheet ( LIS ) in Nunavut. The map integrates information from previous surficial geology maps and >14 000 field station...
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crwiley:10.1111/bor.12479 2024-06-23T07:50:11+00:00 A new map of glacigenic features and glacial landsystems in central mainland Nunavut, Canada McMartin, Isabelle Godbout, Pierre‐Marc Campbell, Janet E. Tremblay, Tommy Behnia, Pouran 2020 http://dx.doi.org/10.1111/bor.12479 https://onlinelibrary.wiley.com/doi/pdf/10.1111/bor.12479 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/bor.12479 en eng Wiley http://creativecommons.org/licenses/by-nc-nd/4.0/ Boreas volume 50, issue 1, page 51-75 ISSN 0300-9483 1502-3885 journal-article 2020 crwiley https://doi.org/10.1111/bor.12479 2024-06-06T04:23:50Z A new digital map of glacial geomorphic features and interpreted glacial landsystems was produced for an area covering ~415 000 km 2 in the Keewatin Sector of the Laurentide Ice Sheet ( LIS ) in Nunavut. The map integrates information from previous surficial geology maps and >14 000 field stations, and is significantly improved by the detailed inventory of ~152 000 glacigenic features using high‐resolution Arctic DEM data and Landsat 8 imagery. From this, we identify and map coherent patterns of landform development (landsystems) between the Manitoba border and the Arctic coast, many of which are entirely new and others that are significantly modified or updated. In particular, we recognize six separate ice streams, including one probable remnant ice stream, and we delineate numerous palimpsest streamlined landscapes with associated ice‐flow trends and relative ages. A continuum of relict terrains with varying basal ice thermal conditions is mapped for the first time in the ice divide migration zone between Baker Lake and Wager Bay. In addition, deglacial cold‐based retreat terrains and preserved warm‐based landscapes unaffected by younger glacial events have been identified. These new georeferenced, multi‐scale data sets and interpreted glacial landsystems provide a comprehensive framework to strengthen reconstructions of the glacial history and dynamics of one of the largest ice domes of the LIS , identify distinct glacial sediment transport paths for applications to mineral exploration, and test numerical modelling of the LIS in support of climate change studies and long‐term evolution of modern ice sheets. Article in Journal/Newspaper Arctic Baker Lake Climate change Ice Sheet Keewatin Nunavut Wager Bay Wiley Online Library Arctic Canada Nunavut Boreas 50 1 51 75 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
A new digital map of glacial geomorphic features and interpreted glacial landsystems was produced for an area covering ~415 000 km 2 in the Keewatin Sector of the Laurentide Ice Sheet ( LIS ) in Nunavut. The map integrates information from previous surficial geology maps and >14 000 field stations, and is significantly improved by the detailed inventory of ~152 000 glacigenic features using high‐resolution Arctic DEM data and Landsat 8 imagery. From this, we identify and map coherent patterns of landform development (landsystems) between the Manitoba border and the Arctic coast, many of which are entirely new and others that are significantly modified or updated. In particular, we recognize six separate ice streams, including one probable remnant ice stream, and we delineate numerous palimpsest streamlined landscapes with associated ice‐flow trends and relative ages. A continuum of relict terrains with varying basal ice thermal conditions is mapped for the first time in the ice divide migration zone between Baker Lake and Wager Bay. In addition, deglacial cold‐based retreat terrains and preserved warm‐based landscapes unaffected by younger glacial events have been identified. These new georeferenced, multi‐scale data sets and interpreted glacial landsystems provide a comprehensive framework to strengthen reconstructions of the glacial history and dynamics of one of the largest ice domes of the LIS , identify distinct glacial sediment transport paths for applications to mineral exploration, and test numerical modelling of the LIS in support of climate change studies and long‐term evolution of modern ice sheets. |
format |
Article in Journal/Newspaper |
author |
McMartin, Isabelle Godbout, Pierre‐Marc Campbell, Janet E. Tremblay, Tommy Behnia, Pouran |
spellingShingle |
McMartin, Isabelle Godbout, Pierre‐Marc Campbell, Janet E. Tremblay, Tommy Behnia, Pouran A new map of glacigenic features and glacial landsystems in central mainland Nunavut, Canada |
author_facet |
McMartin, Isabelle Godbout, Pierre‐Marc Campbell, Janet E. Tremblay, Tommy Behnia, Pouran |
author_sort |
McMartin, Isabelle |
title |
A new map of glacigenic features and glacial landsystems in central mainland Nunavut, Canada |
title_short |
A new map of glacigenic features and glacial landsystems in central mainland Nunavut, Canada |
title_full |
A new map of glacigenic features and glacial landsystems in central mainland Nunavut, Canada |
title_fullStr |
A new map of glacigenic features and glacial landsystems in central mainland Nunavut, Canada |
title_full_unstemmed |
A new map of glacigenic features and glacial landsystems in central mainland Nunavut, Canada |
title_sort |
new map of glacigenic features and glacial landsystems in central mainland nunavut, canada |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1111/bor.12479 https://onlinelibrary.wiley.com/doi/pdf/10.1111/bor.12479 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/bor.12479 |
geographic |
Arctic Canada Nunavut |
geographic_facet |
Arctic Canada Nunavut |
genre |
Arctic Baker Lake Climate change Ice Sheet Keewatin Nunavut Wager Bay |
genre_facet |
Arctic Baker Lake Climate change Ice Sheet Keewatin Nunavut Wager Bay |
op_source |
Boreas volume 50, issue 1, page 51-75 ISSN 0300-9483 1502-3885 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.1111/bor.12479 |
container_title |
Boreas |
container_volume |
50 |
container_issue |
1 |
container_start_page |
51 |
op_container_end_page |
75 |
_version_ |
1802641055880839168 |