The influence of secondary weathering processes on dissolved nickel isotope compositions under cold climatic conditions – Observations from the Mackenzie Basin
Nickel (Ni) and its stable isotope signature (δ60Ni) have recently gained momentum as a tracer of nutrient cycling in the modern and past oceans. A robust understanding of Ni isotope cycling in the ocean rests on an accurate understanding of the Ni sources and sinks to and from the oceans. In partic...
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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/644121 2024-02-04T10:02:01+01:00 The influence of secondary weathering processes on dissolved nickel isotope compositions under cold climatic conditions – Observations from the Mackenzie Basin Charbonnier, Quentin Rickli, Jörg Archer, Corey id_orcid:0 000-0002-6070-6297 Vance, Derek 2024-01-01 application/application/pdf https://hdl.handle.net/20.500.11850/644121 https://doi.org/10.3929/ethz-b-000644121 en eng Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.gca.2023.10.026 info:eu-repo/semantics/altIdentifier/wos/001122398000001 info:eu-repo/grantAgreement/SNF/Projekte MINT/184873 http://hdl.handle.net/20.500.11850/644121 doi:10.3929/ethz-b-000644121 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International Geochimica et Cosmochimica Acta, 364 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2024 ftethz https://doi.org/20.500.11850/64412110.3929/ethz-b-00064412110.1016/j.gca.2023.10.026 2024-01-08T00:52:44Z Nickel (Ni) and its stable isotope signature (δ60Ni) have recently gained momentum as a tracer of nutrient cycling in the modern and past oceans. A robust understanding of Ni isotope cycling in the ocean rests on an accurate understanding of the Ni sources and sinks to and from the oceans. In particular, rivers, which are the dominant Ni source to the oceans, show significant variation in Ni isotopes compared to rocks, thought to reflect variable extents of formation of secondary phases that scavenge light Ni isotopes. The current estimate of the global isotope composition of riverine Ni is based on a few large rivers in warm climates, thus preventing the assessment of a potential climatic control on the Ni isotope flux to the ocean. In this contribution, we investigate the Ni elemental and isotope signatures of river catchments in cold climates, namely the Mackenzie Basin tributaries (Canada) and two rivers, the Nass and Skeena, draining the Western Cordillera. The river solid load in the Mackenzie Basin shows almost no resolvable variation in terms of Ni abundances and Ni isotopes, which are similar to silicate rocks. Furthermore, dissolved Ni and Ni isotopes do not show any relationship with source tracers. This suggests a minimal source control on variations in riverine Ni. This result is particularly intriguing as riverine chemistry in the Mackenzie Basin is often dominated by lithological controls, including rocks other than silicate, such as carbonate and black shale. Instead, the variations in dissolved Ni isotopes are related to the removal of dissolved Ni, reflecting the dominant control by secondary weathering processes. The Ni isotope fingerprint of these secondary weathering processes reflects Ni scavenging into metal oxides, consistent with the literature. The data presented here and literature data show that dissolved Ni and lithium isotopes (a tracer of clay formation) exhibit contrasting patterns between the Mackenzie and the Amazon basins. This suggests that climatic conditions might couple or ... Article in Journal/Newspaper Mackenzie Basin ETH Zürich Research Collection Canada Skeena ENVELOPE(-130.198,-130.198,53.646,53.646) |
institution |
Open Polar |
collection |
ETH Zürich Research Collection |
op_collection_id |
ftethz |
language |
English |
description |
Nickel (Ni) and its stable isotope signature (δ60Ni) have recently gained momentum as a tracer of nutrient cycling in the modern and past oceans. A robust understanding of Ni isotope cycling in the ocean rests on an accurate understanding of the Ni sources and sinks to and from the oceans. In particular, rivers, which are the dominant Ni source to the oceans, show significant variation in Ni isotopes compared to rocks, thought to reflect variable extents of formation of secondary phases that scavenge light Ni isotopes. The current estimate of the global isotope composition of riverine Ni is based on a few large rivers in warm climates, thus preventing the assessment of a potential climatic control on the Ni isotope flux to the ocean. In this contribution, we investigate the Ni elemental and isotope signatures of river catchments in cold climates, namely the Mackenzie Basin tributaries (Canada) and two rivers, the Nass and Skeena, draining the Western Cordillera. The river solid load in the Mackenzie Basin shows almost no resolvable variation in terms of Ni abundances and Ni isotopes, which are similar to silicate rocks. Furthermore, dissolved Ni and Ni isotopes do not show any relationship with source tracers. This suggests a minimal source control on variations in riverine Ni. This result is particularly intriguing as riverine chemistry in the Mackenzie Basin is often dominated by lithological controls, including rocks other than silicate, such as carbonate and black shale. Instead, the variations in dissolved Ni isotopes are related to the removal of dissolved Ni, reflecting the dominant control by secondary weathering processes. The Ni isotope fingerprint of these secondary weathering processes reflects Ni scavenging into metal oxides, consistent with the literature. The data presented here and literature data show that dissolved Ni and lithium isotopes (a tracer of clay formation) exhibit contrasting patterns between the Mackenzie and the Amazon basins. This suggests that climatic conditions might couple or ... |
format |
Article in Journal/Newspaper |
author |
Charbonnier, Quentin Rickli, Jörg Archer, Corey id_orcid:0 000-0002-6070-6297 Vance, Derek |
spellingShingle |
Charbonnier, Quentin Rickli, Jörg Archer, Corey id_orcid:0 000-0002-6070-6297 Vance, Derek The influence of secondary weathering processes on dissolved nickel isotope compositions under cold climatic conditions – Observations from the Mackenzie Basin |
author_facet |
Charbonnier, Quentin Rickli, Jörg Archer, Corey id_orcid:0 000-0002-6070-6297 Vance, Derek |
author_sort |
Charbonnier, Quentin |
title |
The influence of secondary weathering processes on dissolved nickel isotope compositions under cold climatic conditions – Observations from the Mackenzie Basin |
title_short |
The influence of secondary weathering processes on dissolved nickel isotope compositions under cold climatic conditions – Observations from the Mackenzie Basin |
title_full |
The influence of secondary weathering processes on dissolved nickel isotope compositions under cold climatic conditions – Observations from the Mackenzie Basin |
title_fullStr |
The influence of secondary weathering processes on dissolved nickel isotope compositions under cold climatic conditions – Observations from the Mackenzie Basin |
title_full_unstemmed |
The influence of secondary weathering processes on dissolved nickel isotope compositions under cold climatic conditions – Observations from the Mackenzie Basin |
title_sort |
influence of secondary weathering processes on dissolved nickel isotope compositions under cold climatic conditions – observations from the mackenzie basin |
publisher |
Elsevier |
publishDate |
2024 |
url |
https://hdl.handle.net/20.500.11850/644121 https://doi.org/10.3929/ethz-b-000644121 |
long_lat |
ENVELOPE(-130.198,-130.198,53.646,53.646) |
geographic |
Canada Skeena |
geographic_facet |
Canada Skeena |
genre |
Mackenzie Basin |
genre_facet |
Mackenzie Basin |
op_source |
Geochimica et Cosmochimica Acta, 364 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.gca.2023.10.026 info:eu-repo/semantics/altIdentifier/wos/001122398000001 info:eu-repo/grantAgreement/SNF/Projekte MINT/184873 http://hdl.handle.net/20.500.11850/644121 doi:10.3929/ethz-b-000644121 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International |
op_doi |
https://doi.org/20.500.11850/64412110.3929/ethz-b-00064412110.1016/j.gca.2023.10.026 |
_version_ |
1789968336063299584 |