Postglacial palaeoenvironmental reconstruction of the Fury and Hecla Strait region (Nunavut) inferred from microfossils and geochemical proxies
ABSTRACT An analysis of sediment records from two lakes located along the southeastern shore of the Fury and Hecla Strait (Nunavut, Canada) allowed us to reconstruct the regional environmental history since deglaciation. Multiproxy profiles, namely particle‐size distribution, elemental geochemistry...
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crwiley:10.1002/jqs.3287 2024-06-02T08:06:52+00:00 Postglacial palaeoenvironmental reconstruction of the Fury and Hecla Strait region (Nunavut) inferred from microfossils and geochemical proxies Adaïmé, Marc‐Élie Pienitz, Reinhard Legendre, Pierre Antoniades, Dermot Natural Sciences and Engineering Research Council of Canada 2021 http://dx.doi.org/10.1002/jqs.3287 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3287 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/jqs.3287 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 37, issue 5, page 944-958 ISSN 0267-8179 1099-1417 journal-article 2021 crwiley https://doi.org/10.1002/jqs.3287 2024-05-03T10:45:07Z ABSTRACT An analysis of sediment records from two lakes located along the southeastern shore of the Fury and Hecla Strait (Nunavut, Canada) allowed us to reconstruct the regional environmental history since deglaciation. Multiproxy profiles, namely particle‐size distribution, elemental geochemistry (based on X‐ray fluorescence) and diatom assemblages, revealed a regional deglaciation and marine inundation around 8200 cal a bp. This suggests that glacial retreat in this region likely occurred several hundred years earlier than previously extrapolated. At that time, the connection between the Atlantic and Pacific Ocean currents must have been established and glacial isostatic adjustment gradually isolated the lacustrine basins from marine influence. Diatom assemblages revealed an abrupt marine–brackish–freshwater transition ( ca . 6670–6130 cal a bp ) through a shift in dominance from initial polyhalobian (e.g. Tabularia fasciculata, Navicula directa ), intermediate mesohalobian (e.g. Cyclostephanos dubius, Thalassiosira baltica ) to oligohalobian (fragilarioid Staurosirella pinnata, Staurosira venter, Pseudostaurosira pseudoconstruens, P. brevistriata ) taxa. Multivariate analyses (redundancy analysis and multivariate regression tree) conducted on the biological and lithogeochemical data also suggest that climatic conditions may have remained relatively warm throughout the interval ~6000–3900 cal a bp , before significantly cooling over the past few millennia, as inferred from a decrease in organic matter accumulation and shifts in diatom communities. Article in Journal/Newspaper Fury and Hecla Strait Nunavut Wiley Online Library Canada Fury ENVELOPE(-83.999,-83.999,69.901,69.901) Nunavut Pacific Journal of Quaternary Science |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
ABSTRACT An analysis of sediment records from two lakes located along the southeastern shore of the Fury and Hecla Strait (Nunavut, Canada) allowed us to reconstruct the regional environmental history since deglaciation. Multiproxy profiles, namely particle‐size distribution, elemental geochemistry (based on X‐ray fluorescence) and diatom assemblages, revealed a regional deglaciation and marine inundation around 8200 cal a bp. This suggests that glacial retreat in this region likely occurred several hundred years earlier than previously extrapolated. At that time, the connection between the Atlantic and Pacific Ocean currents must have been established and glacial isostatic adjustment gradually isolated the lacustrine basins from marine influence. Diatom assemblages revealed an abrupt marine–brackish–freshwater transition ( ca . 6670–6130 cal a bp ) through a shift in dominance from initial polyhalobian (e.g. Tabularia fasciculata, Navicula directa ), intermediate mesohalobian (e.g. Cyclostephanos dubius, Thalassiosira baltica ) to oligohalobian (fragilarioid Staurosirella pinnata, Staurosira venter, Pseudostaurosira pseudoconstruens, P. brevistriata ) taxa. Multivariate analyses (redundancy analysis and multivariate regression tree) conducted on the biological and lithogeochemical data also suggest that climatic conditions may have remained relatively warm throughout the interval ~6000–3900 cal a bp , before significantly cooling over the past few millennia, as inferred from a decrease in organic matter accumulation and shifts in diatom communities. |
author2 |
Natural Sciences and Engineering Research Council of Canada |
format |
Article in Journal/Newspaper |
author |
Adaïmé, Marc‐Élie Pienitz, Reinhard Legendre, Pierre Antoniades, Dermot |
spellingShingle |
Adaïmé, Marc‐Élie Pienitz, Reinhard Legendre, Pierre Antoniades, Dermot Postglacial palaeoenvironmental reconstruction of the Fury and Hecla Strait region (Nunavut) inferred from microfossils and geochemical proxies |
author_facet |
Adaïmé, Marc‐Élie Pienitz, Reinhard Legendre, Pierre Antoniades, Dermot |
author_sort |
Adaïmé, Marc‐Élie |
title |
Postglacial palaeoenvironmental reconstruction of the Fury and Hecla Strait region (Nunavut) inferred from microfossils and geochemical proxies |
title_short |
Postglacial palaeoenvironmental reconstruction of the Fury and Hecla Strait region (Nunavut) inferred from microfossils and geochemical proxies |
title_full |
Postglacial palaeoenvironmental reconstruction of the Fury and Hecla Strait region (Nunavut) inferred from microfossils and geochemical proxies |
title_fullStr |
Postglacial palaeoenvironmental reconstruction of the Fury and Hecla Strait region (Nunavut) inferred from microfossils and geochemical proxies |
title_full_unstemmed |
Postglacial palaeoenvironmental reconstruction of the Fury and Hecla Strait region (Nunavut) inferred from microfossils and geochemical proxies |
title_sort |
postglacial palaeoenvironmental reconstruction of the fury and hecla strait region (nunavut) inferred from microfossils and geochemical proxies |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1002/jqs.3287 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3287 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/jqs.3287 |
long_lat |
ENVELOPE(-83.999,-83.999,69.901,69.901) |
geographic |
Canada Fury Nunavut Pacific |
geographic_facet |
Canada Fury Nunavut Pacific |
genre |
Fury and Hecla Strait Nunavut |
genre_facet |
Fury and Hecla Strait Nunavut |
op_source |
Journal of Quaternary Science volume 37, issue 5, page 944-958 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.3287 |
container_title |
Journal of Quaternary Science |
_version_ |
1800751856556703744 |