Geochemical signatures of sediments documenting Arctic sea-ice and water mass export through Fram Strait since the Last Glacial Maximum
International audience Elemental (Ca, Zr, Th, etc.) and radiogenic isotope (Pb, Nd, Sr) measurements in leachates and residues from deep-sea sediments of core MC16 (WarmPast Program) in central Fram Strait were used to document the geochemical signatures of outflowing Arctic water masses and ice raf...
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Online Access: | https://hal.univ-lorraine.fr/hal-01762149 https://doi.org/10.1016/j.quascirev.2012.10.029 |
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ftccsdartic:oai:HAL:hal-01762149v1 2023-05-15T14:58:07+02:00 Geochemical signatures of sediments documenting Arctic sea-ice and water mass export through Fram Strait since the Last Glacial Maximum Maccali, Jenny Hillaire-Marcel, Claude Carignan, Jean Reisberg, Laurie Centre de recherche sur la dynamique du système Terre (GEOTOP) Université de Montréal (UdeM)-McGill University = Université McGill Montréal, Canada -École Polytechnique de Montréal (EPM)-Concordia University Montreal -Université du Québec à Rimouski (UQAR)-Université du Québec à Montréal = University of Québec in Montréal (UQAM)-Université du Québec en Abitibi-Témiscamingue (UQAT) Centre de Recherches Pétrographiques et Géochimiques (CRPG) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) Takuvik Joint International Laboratory ULAVAL-CNRS Centre National de la Recherche Scientifique (CNRS)-Université Laval Québec (ULaval) 2013-03 https://hal.univ-lorraine.fr/hal-01762149 https://doi.org/10.1016/j.quascirev.2012.10.029 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2012.10.029 hal-01762149 https://hal.univ-lorraine.fr/hal-01762149 doi:10.1016/j.quascirev.2012.10.029 ISSN: 0277-3791 Quaternary Science Reviews https://hal.univ-lorraine.fr/hal-01762149 Quaternary Science Reviews, Elsevier, 2013, 64, pp.136 - 151. ⟨10.1016/j.quascirev.2012.10.029⟩ Arctic Ocean Marine geochemistry Paleoceanography [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2013 ftccsdartic https://doi.org/10.1016/j.quascirev.2012.10.029 2021-10-24T06:58:22Z International audience Elemental (Ca, Zr, Th, etc.) and radiogenic isotope (Pb, Nd, Sr) measurements in leachates and residues from deep-sea sediments of core MC16 (WarmPast Program) in central Fram Strait were used to document the geochemical signatures of outflowing Arctic water masses and ice rafted debris (IRD) since the Last Glacial Maximum. In addition, the elemental distribution among the three main sedimentary fractions (terrigenous, biogenic and authigenic) was quantified. Elements dominated by the terrigenous fraction display a change at ∼13 ka assigned to an early Younger Dryas (YD) event. In the authigenic fraction, migration of the redox front, perhaps spurred by discontinuous delivery of organic matter to the sediment, has led to the mobility of elements such as Mn. Fe contents display lesser variability within the sediment suggesting that Fe experienced only minor redox-related redistribution. Authigenic Pb and Nd, thought to be hosted primarily by Fe-oxyhydroxides, also show little evidence of mobility, suggesting that their isotopic compositions should reliably record the isotopic compositions of past bottom water.We have broadly identified the isotopic signatures of the three major source areas of IRD, the Russian, Canadian and Greenland margins. The elemental and isotopic residue records from core MC16 display distinct trends prior to and after the YD. The pre-YD interval, with ɛNd values between −10.1 and −13.2, and 87Sr/86Sr ratios from 0.715 to 0721, reflects a mixture of IRD from the Russian and Canadian margins. The YD episode stands out with sediments originating mostly from the Canadian end-member, displaying the lowest ɛNd values and highest 87Sr/86Sr ratios. This suggests enhanced sea-ice production and/or drifting along the Beaufort Gyre at that time. The post-YD interval, i.e. the Holocene, is characterized by a less variable mixture of IRD material, with ɛNd values and 87Sr/86Sr ratios centred at −12.2 and 0.718 respectively. This material was derived from several sources ... Article in Journal/Newspaper Arctic Arctic Ocean Fram Strait Greenland Sea ice Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Arctic Arctic Ocean Greenland Quaternary Science Reviews 64 136 151 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Arctic Ocean Marine geochemistry Paleoceanography [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
Arctic Ocean Marine geochemistry Paleoceanography [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Maccali, Jenny Hillaire-Marcel, Claude Carignan, Jean Reisberg, Laurie Geochemical signatures of sediments documenting Arctic sea-ice and water mass export through Fram Strait since the Last Glacial Maximum |
topic_facet |
Arctic Ocean Marine geochemistry Paleoceanography [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience Elemental (Ca, Zr, Th, etc.) and radiogenic isotope (Pb, Nd, Sr) measurements in leachates and residues from deep-sea sediments of core MC16 (WarmPast Program) in central Fram Strait were used to document the geochemical signatures of outflowing Arctic water masses and ice rafted debris (IRD) since the Last Glacial Maximum. In addition, the elemental distribution among the three main sedimentary fractions (terrigenous, biogenic and authigenic) was quantified. Elements dominated by the terrigenous fraction display a change at ∼13 ka assigned to an early Younger Dryas (YD) event. In the authigenic fraction, migration of the redox front, perhaps spurred by discontinuous delivery of organic matter to the sediment, has led to the mobility of elements such as Mn. Fe contents display lesser variability within the sediment suggesting that Fe experienced only minor redox-related redistribution. Authigenic Pb and Nd, thought to be hosted primarily by Fe-oxyhydroxides, also show little evidence of mobility, suggesting that their isotopic compositions should reliably record the isotopic compositions of past bottom water.We have broadly identified the isotopic signatures of the three major source areas of IRD, the Russian, Canadian and Greenland margins. The elemental and isotopic residue records from core MC16 display distinct trends prior to and after the YD. The pre-YD interval, with ɛNd values between −10.1 and −13.2, and 87Sr/86Sr ratios from 0.715 to 0721, reflects a mixture of IRD from the Russian and Canadian margins. The YD episode stands out with sediments originating mostly from the Canadian end-member, displaying the lowest ɛNd values and highest 87Sr/86Sr ratios. This suggests enhanced sea-ice production and/or drifting along the Beaufort Gyre at that time. The post-YD interval, i.e. the Holocene, is characterized by a less variable mixture of IRD material, with ɛNd values and 87Sr/86Sr ratios centred at −12.2 and 0.718 respectively. This material was derived from several sources ... |
author2 |
Centre de recherche sur la dynamique du système Terre (GEOTOP) Université de Montréal (UdeM)-McGill University = Université McGill Montréal, Canada -École Polytechnique de Montréal (EPM)-Concordia University Montreal -Université du Québec à Rimouski (UQAR)-Université du Québec à Montréal = University of Québec in Montréal (UQAM)-Université du Québec en Abitibi-Témiscamingue (UQAT) Centre de Recherches Pétrographiques et Géochimiques (CRPG) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) Takuvik Joint International Laboratory ULAVAL-CNRS Centre National de la Recherche Scientifique (CNRS)-Université Laval Québec (ULaval) |
format |
Article in Journal/Newspaper |
author |
Maccali, Jenny Hillaire-Marcel, Claude Carignan, Jean Reisberg, Laurie |
author_facet |
Maccali, Jenny Hillaire-Marcel, Claude Carignan, Jean Reisberg, Laurie |
author_sort |
Maccali, Jenny |
title |
Geochemical signatures of sediments documenting Arctic sea-ice and water mass export through Fram Strait since the Last Glacial Maximum |
title_short |
Geochemical signatures of sediments documenting Arctic sea-ice and water mass export through Fram Strait since the Last Glacial Maximum |
title_full |
Geochemical signatures of sediments documenting Arctic sea-ice and water mass export through Fram Strait since the Last Glacial Maximum |
title_fullStr |
Geochemical signatures of sediments documenting Arctic sea-ice and water mass export through Fram Strait since the Last Glacial Maximum |
title_full_unstemmed |
Geochemical signatures of sediments documenting Arctic sea-ice and water mass export through Fram Strait since the Last Glacial Maximum |
title_sort |
geochemical signatures of sediments documenting arctic sea-ice and water mass export through fram strait since the last glacial maximum |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.univ-lorraine.fr/hal-01762149 https://doi.org/10.1016/j.quascirev.2012.10.029 |
geographic |
Arctic Arctic Ocean Greenland |
geographic_facet |
Arctic Arctic Ocean Greenland |
genre |
Arctic Arctic Ocean Fram Strait Greenland Sea ice |
genre_facet |
Arctic Arctic Ocean Fram Strait Greenland Sea ice |
op_source |
ISSN: 0277-3791 Quaternary Science Reviews https://hal.univ-lorraine.fr/hal-01762149 Quaternary Science Reviews, Elsevier, 2013, 64, pp.136 - 151. ⟨10.1016/j.quascirev.2012.10.029⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2012.10.029 hal-01762149 https://hal.univ-lorraine.fr/hal-01762149 doi:10.1016/j.quascirev.2012.10.029 |
op_doi |
https://doi.org/10.1016/j.quascirev.2012.10.029 |
container_title |
Quaternary Science Reviews |
container_volume |
64 |
container_start_page |
136 |
op_container_end_page |
151 |
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1766330213090721792 |