Early Holocene deglaciation of northern Hudson Bay and Foxe Channel constrained by new radiocarbon ages and marine reservoir correction
Abstract Radiocarbon ages from Southampton Island (Canada) provide new chronological control on the deglaciation of Foxe Channel and northern Hudson Bay, a strategic area for understanding the demise of a marine-based portion of the Laurentide Ice Sheet. A regional marine reservoir age of 630 ± 45 y...
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Cambridge University Press (CUP)
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crcambridgeupr:10.1016/j.yqres.2012.03.001 2024-06-09T07:46:02+00:00 Early Holocene deglaciation of northern Hudson Bay and Foxe Channel constrained by new radiocarbon ages and marine reservoir correction Ross, Martin Utting, Daniel J. Lajeunesse, Patrick Kosar, Kevin G.A. 2012 http://dx.doi.org/10.1016/j.yqres.2012.03.001 http://api.elsevier.com/content/article/PII:S0033589412000270?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589412000270?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400008401 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 78, issue 1, page 82-94 ISSN 0033-5894 1096-0287 journal-article 2012 crcambridgeupr https://doi.org/10.1016/j.yqres.2012.03.001 2024-05-15T13:07:38Z Abstract Radiocarbon ages from Southampton Island (Canada) provide new chronological control on the deglaciation of Foxe Channel and northern Hudson Bay, a strategic area for understanding the demise of a marine-based portion of the Laurentide Ice Sheet. A regional marine reservoir age of 630 ± 45 yr and a reservoir offset ( ΔR ) of 263 ± 48 yr were calculated from two early to mid-Holocene terrestrial/marine radiocarbon age pairs. These values are consistent with corrections based on early 20th century mollusks suggesting that following deglaciation the oceanic conditions controlling the regional reservoir effect rapidly became similar to those of modern times. However, our ΔR value is 352 ± 52 yr less than another correction from eastern Foxe Basin, which may be affected by 14 C dilution from carbonate rocks. Our ΔR value is used to calibrate new marine radiocarbon ages which help further develop the deglaciation history of Southampton Island, especially along the north coast where deglaciation of Foxe Channel appears to have been completed by 8100–7800 cal yr BP (2σ). This provides key chronological constraints on the development of a long marine ice margin in southern Foxe Basin prior to the final breakup of the Foxe ice dome. Article in Journal/Newspaper Foxe Basin Foxe Channel Hudson Bay Ice Sheet Southampton Island Cambridge University Press Canada Foxe Basin ENVELOPE(-77.918,-77.918,65.931,65.931) Foxe Channel ENVELOPE(-79.999,-79.999,65.001,65.001) Hudson Hudson Bay Southampton Island ENVELOPE(-84.501,-84.501,64.463,64.463) Quaternary Research 78 1 82 94 |
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Open Polar |
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Cambridge University Press |
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English |
description |
Abstract Radiocarbon ages from Southampton Island (Canada) provide new chronological control on the deglaciation of Foxe Channel and northern Hudson Bay, a strategic area for understanding the demise of a marine-based portion of the Laurentide Ice Sheet. A regional marine reservoir age of 630 ± 45 yr and a reservoir offset ( ΔR ) of 263 ± 48 yr were calculated from two early to mid-Holocene terrestrial/marine radiocarbon age pairs. These values are consistent with corrections based on early 20th century mollusks suggesting that following deglaciation the oceanic conditions controlling the regional reservoir effect rapidly became similar to those of modern times. However, our ΔR value is 352 ± 52 yr less than another correction from eastern Foxe Basin, which may be affected by 14 C dilution from carbonate rocks. Our ΔR value is used to calibrate new marine radiocarbon ages which help further develop the deglaciation history of Southampton Island, especially along the north coast where deglaciation of Foxe Channel appears to have been completed by 8100–7800 cal yr BP (2σ). This provides key chronological constraints on the development of a long marine ice margin in southern Foxe Basin prior to the final breakup of the Foxe ice dome. |
format |
Article in Journal/Newspaper |
author |
Ross, Martin Utting, Daniel J. Lajeunesse, Patrick Kosar, Kevin G.A. |
spellingShingle |
Ross, Martin Utting, Daniel J. Lajeunesse, Patrick Kosar, Kevin G.A. Early Holocene deglaciation of northern Hudson Bay and Foxe Channel constrained by new radiocarbon ages and marine reservoir correction |
author_facet |
Ross, Martin Utting, Daniel J. Lajeunesse, Patrick Kosar, Kevin G.A. |
author_sort |
Ross, Martin |
title |
Early Holocene deglaciation of northern Hudson Bay and Foxe Channel constrained by new radiocarbon ages and marine reservoir correction |
title_short |
Early Holocene deglaciation of northern Hudson Bay and Foxe Channel constrained by new radiocarbon ages and marine reservoir correction |
title_full |
Early Holocene deglaciation of northern Hudson Bay and Foxe Channel constrained by new radiocarbon ages and marine reservoir correction |
title_fullStr |
Early Holocene deglaciation of northern Hudson Bay and Foxe Channel constrained by new radiocarbon ages and marine reservoir correction |
title_full_unstemmed |
Early Holocene deglaciation of northern Hudson Bay and Foxe Channel constrained by new radiocarbon ages and marine reservoir correction |
title_sort |
early holocene deglaciation of northern hudson bay and foxe channel constrained by new radiocarbon ages and marine reservoir correction |
publisher |
Cambridge University Press (CUP) |
publishDate |
2012 |
url |
http://dx.doi.org/10.1016/j.yqres.2012.03.001 http://api.elsevier.com/content/article/PII:S0033589412000270?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589412000270?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400008401 |
long_lat |
ENVELOPE(-77.918,-77.918,65.931,65.931) ENVELOPE(-79.999,-79.999,65.001,65.001) ENVELOPE(-84.501,-84.501,64.463,64.463) |
geographic |
Canada Foxe Basin Foxe Channel Hudson Hudson Bay Southampton Island |
geographic_facet |
Canada Foxe Basin Foxe Channel Hudson Hudson Bay Southampton Island |
genre |
Foxe Basin Foxe Channel Hudson Bay Ice Sheet Southampton Island |
genre_facet |
Foxe Basin Foxe Channel Hudson Bay Ice Sheet Southampton Island |
op_source |
Quaternary Research volume 78, issue 1, page 82-94 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1016/j.yqres.2012.03.001 |
container_title |
Quaternary Research |
container_volume |
78 |
container_issue |
1 |
container_start_page |
82 |
op_container_end_page |
94 |
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1801375727318204416 |