Dynamics of Manganese and Cerium Enrichments in Arctic Ocean Sediments: A Case Study From the Alpha Ridge
Manganese (Mn) and cerium (Ce) are known as reactive metals sensitive to marine redox conditions, and can therefore serve as useful proxies for paleoceanographic environments. Quaternary sedimentary records in the Arctic Ocean show a consistent cyclicity of Mn enrichments, but Mn sources, transporta...
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ftdoajarticles:oai:doaj.org/article:9c5b6fc4e287467881c9530354b09d78 2023-05-15T13:20:23+02:00 Dynamics of Manganese and Cerium Enrichments in Arctic Ocean Sediments: A Case Study From the Alpha Ridge Liming Ye Christian März Leonid Polyak Xiaoguo Yu Weiyan Zhang 2019-01-01T00:00:00Z https://doi.org/10.3389/feart.2018.00236 https://doaj.org/article/9c5b6fc4e287467881c9530354b09d78 EN eng Frontiers Media S.A. https://www.frontiersin.org/article/10.3389/feart.2018.00236/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2018.00236 https://doaj.org/article/9c5b6fc4e287467881c9530354b09d78 Frontiers in Earth Science, Vol 6 (2019) Arctic Ocean reactive metals sea level paleoceanography sedimentary stratigraphy Quaternary Science Q article 2019 ftdoajarticles https://doi.org/10.3389/feart.2018.00236 2022-12-31T14:55:53Z Manganese (Mn) and cerium (Ce) are known as reactive metals sensitive to marine redox conditions, and can therefore serve as useful proxies for paleoceanographic environments. Quaternary sedimentary records in the Arctic Ocean show a consistent cyclicity of Mn enrichments, but Mn sources, transportation and deposition patterns, and relationship to paleoclimatic conditions are not well understood. Sediment core ARC3-B85D from the Alpha Ridge with the estimated stratigraphy covering ∼350 kyr is used to investigate a coupled distribution of Mn and Ce in Quaternary Arctic Ocean sediments. By analyzing Mn and Ce distribution patterns in the core and surface sediments from the western Arctic Ocean and adjacent shelves, we investigate the conditions and dynamics of concurrent metal enrichments. Stratigraphic Ce and Mn patterns follow inferred glacial-interglacial cycles, with enrichments generally occurring during interglacial-type conditions with high sea levels. However, the relationships involved are not straightforward as highest Mn and Ce enrichments seem to occur closer to the end of interglacial/major interstadial periods, when sea levels were lowering from their highest positions. We conclude that the enrichment patterns are primarily defined by sediment dynamics controlling resuspension and transportation of reactive metals and their deposition in the central Arctic Ocean after diagenetic preconditioning on the shelves. We further infer that major transportation agents are sea-level affected cross-shelf and mid-depth ocean currents rather than sea ice as has been proposed earlier. Comprehending this coupled geochemical and sedimentary system is important for improving the chronostratigraphic framework for Quaternary deposits in the Arctic Ocean. Article in Journal/Newspaper alpha ridge Arctic Arctic Ocean Sea ice Directory of Open Access Journals: DOAJ Articles Alpha Ridge ENVELOPE(-120.000,-120.000,85.500,85.500) Arctic Arctic Ocean Frontiers in Earth Science 6 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic Ocean reactive metals sea level paleoceanography sedimentary stratigraphy Quaternary Science Q |
spellingShingle |
Arctic Ocean reactive metals sea level paleoceanography sedimentary stratigraphy Quaternary Science Q Liming Ye Christian März Leonid Polyak Xiaoguo Yu Weiyan Zhang Dynamics of Manganese and Cerium Enrichments in Arctic Ocean Sediments: A Case Study From the Alpha Ridge |
topic_facet |
Arctic Ocean reactive metals sea level paleoceanography sedimentary stratigraphy Quaternary Science Q |
description |
Manganese (Mn) and cerium (Ce) are known as reactive metals sensitive to marine redox conditions, and can therefore serve as useful proxies for paleoceanographic environments. Quaternary sedimentary records in the Arctic Ocean show a consistent cyclicity of Mn enrichments, but Mn sources, transportation and deposition patterns, and relationship to paleoclimatic conditions are not well understood. Sediment core ARC3-B85D from the Alpha Ridge with the estimated stratigraphy covering ∼350 kyr is used to investigate a coupled distribution of Mn and Ce in Quaternary Arctic Ocean sediments. By analyzing Mn and Ce distribution patterns in the core and surface sediments from the western Arctic Ocean and adjacent shelves, we investigate the conditions and dynamics of concurrent metal enrichments. Stratigraphic Ce and Mn patterns follow inferred glacial-interglacial cycles, with enrichments generally occurring during interglacial-type conditions with high sea levels. However, the relationships involved are not straightforward as highest Mn and Ce enrichments seem to occur closer to the end of interglacial/major interstadial periods, when sea levels were lowering from their highest positions. We conclude that the enrichment patterns are primarily defined by sediment dynamics controlling resuspension and transportation of reactive metals and their deposition in the central Arctic Ocean after diagenetic preconditioning on the shelves. We further infer that major transportation agents are sea-level affected cross-shelf and mid-depth ocean currents rather than sea ice as has been proposed earlier. Comprehending this coupled geochemical and sedimentary system is important for improving the chronostratigraphic framework for Quaternary deposits in the Arctic Ocean. |
format |
Article in Journal/Newspaper |
author |
Liming Ye Christian März Leonid Polyak Xiaoguo Yu Weiyan Zhang |
author_facet |
Liming Ye Christian März Leonid Polyak Xiaoguo Yu Weiyan Zhang |
author_sort |
Liming Ye |
title |
Dynamics of Manganese and Cerium Enrichments in Arctic Ocean Sediments: A Case Study From the Alpha Ridge |
title_short |
Dynamics of Manganese and Cerium Enrichments in Arctic Ocean Sediments: A Case Study From the Alpha Ridge |
title_full |
Dynamics of Manganese and Cerium Enrichments in Arctic Ocean Sediments: A Case Study From the Alpha Ridge |
title_fullStr |
Dynamics of Manganese and Cerium Enrichments in Arctic Ocean Sediments: A Case Study From the Alpha Ridge |
title_full_unstemmed |
Dynamics of Manganese and Cerium Enrichments in Arctic Ocean Sediments: A Case Study From the Alpha Ridge |
title_sort |
dynamics of manganese and cerium enrichments in arctic ocean sediments: a case study from the alpha ridge |
publisher |
Frontiers Media S.A. |
publishDate |
2019 |
url |
https://doi.org/10.3389/feart.2018.00236 https://doaj.org/article/9c5b6fc4e287467881c9530354b09d78 |
long_lat |
ENVELOPE(-120.000,-120.000,85.500,85.500) |
geographic |
Alpha Ridge Arctic Arctic Ocean |
geographic_facet |
Alpha Ridge Arctic Arctic Ocean |
genre |
alpha ridge Arctic Arctic Ocean Sea ice |
genre_facet |
alpha ridge Arctic Arctic Ocean Sea ice |
op_source |
Frontiers in Earth Science, Vol 6 (2019) |
op_relation |
https://www.frontiersin.org/article/10.3389/feart.2018.00236/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2018.00236 https://doaj.org/article/9c5b6fc4e287467881c9530354b09d78 |
op_doi |
https://doi.org/10.3389/feart.2018.00236 |
container_title |
Frontiers in Earth Science |
container_volume |
6 |
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1766353141905752064 |