Controlling factors and impacts of river-borne neodymium isotope signatures and rare earth element concentrations supplied to the Canadian Arctic Archipelago
International audience Determining the factors controlling the neodymium (Nd) isotopic compositions (expressed as ε Nd ) and rare earth element (REE) concentrations of rivers is imperative to improve our understanding of the distribution of these water mass tracers in the ocean. Here we present the...
Published in: | Earth and Planetary Science Letters |
---|---|
Main Authors: | , , , , , , , , , |
Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2022
|
Subjects: | |
Online Access: | https://hal-insu.archives-ouvertes.fr/insu-03671385 https://hal-insu.archives-ouvertes.fr/insu-03671385/document https://hal-insu.archives-ouvertes.fr/insu-03671385/file/1-s2.0-S0012821X21005975-main.pdf https://doi.org/10.1016/j.epsl.2021.117341 |
id |
ftinsu:oai:HAL:insu-03671385v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
river geochemistry Rare Earth Elements neodymium isotopes bedrock geology dissolved riverine inputs Canadian Arctic Archipelago [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
river geochemistry Rare Earth Elements neodymium isotopes bedrock geology dissolved riverine inputs Canadian Arctic Archipelago [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Grenier, M. Brown, K. A. Colombo, M. Belhadj, M. Baconnais, I. Pham, V. Soon, M. Myers, P. G. Jeandel, C. François, R. Controlling factors and impacts of river-borne neodymium isotope signatures and rare earth element concentrations supplied to the Canadian Arctic Archipelago |
topic_facet |
river geochemistry Rare Earth Elements neodymium isotopes bedrock geology dissolved riverine inputs Canadian Arctic Archipelago [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience Determining the factors controlling the neodymium (Nd) isotopic compositions (expressed as ε Nd ) and rare earth element (REE) concentrations of rivers is imperative to improve our understanding of the distribution of these water mass tracers in the ocean. Here we present the first measurements of <0.45 μm-filtrate REE concentrations (i.e., the concentration of truly dissolved, nano-particulate and colloidal REEs passing through a 0.45 μm filter, hereafter referred to as dissolved) and ε Nd in rivers draining into the Canadian Arctic Archipelago (CAA). Results show a large variation in both REE concentrations (Nd = [ 8 37 , 260 ] pmol/kg) and ε Nd ([ - 32.1 - 15.1 ]) in the thirteen rivers sampled. Dissolved REE concentrations increase with increasing fractions of metamorphic rocks and ice cover in the rivers' watersheds, while ε Nd and PAAS-normalized REE patterns are inherited from the watershed's bedrock lithology. The four rivers draining watersheds composed of Precambrian metamorphic rocks exhibit the highest REE concentrations, the least radiogenic ε Nd , and shale-normalized patterns enriched in light REEs. The remaining nine rivers drain mainly or exclusively sedimentary bedrock and have lower REE concentrations, more radiogenic ε Nd and generally show heavy REE enrichment, with variable negative cerium (Ce) anomalies. The presence of ice sheets in the drainage area, and the ionic strength, pH, and dissolved organic carbon concentration of river water are the main factors determining riverine dissolved REE concentrations by controlling the formation and stabilization of colloids. We estimate a flow of dissolved Nd transported by Arctic rivers discharging into the CAA equivalent to the Nd flux of seawater entering the CAA. Depending on the percentage of Nd removal during mixing with seawater, the impact of river water on the ε Nd of seawater exiting the CAA could be modest (if 90% removal) or more significant (if ≪90% removal). This riverine contribution could potentially ... |
author2 |
Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Grenier, M. Brown, K. A. Colombo, M. Belhadj, M. Baconnais, I. Pham, V. Soon, M. Myers, P. G. Jeandel, C. François, R. |
author_facet |
Grenier, M. Brown, K. A. Colombo, M. Belhadj, M. Baconnais, I. Pham, V. Soon, M. Myers, P. G. Jeandel, C. François, R. |
author_sort |
Grenier, M. |
title |
Controlling factors and impacts of river-borne neodymium isotope signatures and rare earth element concentrations supplied to the Canadian Arctic Archipelago |
title_short |
Controlling factors and impacts of river-borne neodymium isotope signatures and rare earth element concentrations supplied to the Canadian Arctic Archipelago |
title_full |
Controlling factors and impacts of river-borne neodymium isotope signatures and rare earth element concentrations supplied to the Canadian Arctic Archipelago |
title_fullStr |
Controlling factors and impacts of river-borne neodymium isotope signatures and rare earth element concentrations supplied to the Canadian Arctic Archipelago |
title_full_unstemmed |
Controlling factors and impacts of river-borne neodymium isotope signatures and rare earth element concentrations supplied to the Canadian Arctic Archipelago |
title_sort |
controlling factors and impacts of river-borne neodymium isotope signatures and rare earth element concentrations supplied to the canadian arctic archipelago |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal-insu.archives-ouvertes.fr/insu-03671385 https://hal-insu.archives-ouvertes.fr/insu-03671385/document https://hal-insu.archives-ouvertes.fr/insu-03671385/file/1-s2.0-S0012821X21005975-main.pdf https://doi.org/10.1016/j.epsl.2021.117341 |
geographic |
Arctic Canadian Arctic Archipelago |
geographic_facet |
Arctic Canadian Arctic Archipelago |
genre |
Arctic Archipelago Arctic Canadian Arctic Archipelago |
genre_facet |
Arctic Archipelago Arctic Canadian Arctic Archipelago |
op_source |
EARTH AND PLANETARY SCIENCE LETTERS https://hal-insu.archives-ouvertes.fr/insu-03671385 EARTH AND PLANETARY SCIENCE LETTERS, 2022, 578, ⟨10.1016/j.epsl.2021.117341⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2021.117341 insu-03671385 https://hal-insu.archives-ouvertes.fr/insu-03671385 https://hal-insu.archives-ouvertes.fr/insu-03671385/document https://hal-insu.archives-ouvertes.fr/insu-03671385/file/1-s2.0-S0012821X21005975-main.pdf BIBCODE: 2022E&PSL.57817341G doi:10.1016/j.epsl.2021.117341 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/ info:eu-repo/semantics/OpenAccess |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.epsl.2021.117341 |
container_title |
Earth and Planetary Science Letters |
container_volume |
578 |
container_start_page |
117341 |
_version_ |
1766302883774464000 |
spelling |
ftinsu:oai:HAL:insu-03671385v1 2023-05-15T14:28:44+02:00 Controlling factors and impacts of river-borne neodymium isotope signatures and rare earth element concentrations supplied to the Canadian Arctic Archipelago Grenier, M. Brown, K. A. Colombo, M. Belhadj, M. Baconnais, I. Pham, V. Soon, M. Myers, P. G. Jeandel, C. François, R. Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS) 2022 https://hal-insu.archives-ouvertes.fr/insu-03671385 https://hal-insu.archives-ouvertes.fr/insu-03671385/document https://hal-insu.archives-ouvertes.fr/insu-03671385/file/1-s2.0-S0012821X21005975-main.pdf https://doi.org/10.1016/j.epsl.2021.117341 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2021.117341 insu-03671385 https://hal-insu.archives-ouvertes.fr/insu-03671385 https://hal-insu.archives-ouvertes.fr/insu-03671385/document https://hal-insu.archives-ouvertes.fr/insu-03671385/file/1-s2.0-S0012821X21005975-main.pdf BIBCODE: 2022E&PSL.57817341G doi:10.1016/j.epsl.2021.117341 http://creativecommons.org/licenses/by-nc-nd/ info:eu-repo/semantics/OpenAccess CC-BY-NC-ND EARTH AND PLANETARY SCIENCE LETTERS https://hal-insu.archives-ouvertes.fr/insu-03671385 EARTH AND PLANETARY SCIENCE LETTERS, 2022, 578, ⟨10.1016/j.epsl.2021.117341⟩ river geochemistry Rare Earth Elements neodymium isotopes bedrock geology dissolved riverine inputs Canadian Arctic Archipelago [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2022 ftinsu https://doi.org/10.1016/j.epsl.2021.117341 2022-11-23T17:29:08Z International audience Determining the factors controlling the neodymium (Nd) isotopic compositions (expressed as ε Nd ) and rare earth element (REE) concentrations of rivers is imperative to improve our understanding of the distribution of these water mass tracers in the ocean. Here we present the first measurements of <0.45 μm-filtrate REE concentrations (i.e., the concentration of truly dissolved, nano-particulate and colloidal REEs passing through a 0.45 μm filter, hereafter referred to as dissolved) and ε Nd in rivers draining into the Canadian Arctic Archipelago (CAA). Results show a large variation in both REE concentrations (Nd = [ 8 37 , 260 ] pmol/kg) and ε Nd ([ - 32.1 - 15.1 ]) in the thirteen rivers sampled. Dissolved REE concentrations increase with increasing fractions of metamorphic rocks and ice cover in the rivers' watersheds, while ε Nd and PAAS-normalized REE patterns are inherited from the watershed's bedrock lithology. The four rivers draining watersheds composed of Precambrian metamorphic rocks exhibit the highest REE concentrations, the least radiogenic ε Nd , and shale-normalized patterns enriched in light REEs. The remaining nine rivers drain mainly or exclusively sedimentary bedrock and have lower REE concentrations, more radiogenic ε Nd and generally show heavy REE enrichment, with variable negative cerium (Ce) anomalies. The presence of ice sheets in the drainage area, and the ionic strength, pH, and dissolved organic carbon concentration of river water are the main factors determining riverine dissolved REE concentrations by controlling the formation and stabilization of colloids. We estimate a flow of dissolved Nd transported by Arctic rivers discharging into the CAA equivalent to the Nd flux of seawater entering the CAA. Depending on the percentage of Nd removal during mixing with seawater, the impact of river water on the ε Nd of seawater exiting the CAA could be modest (if 90% removal) or more significant (if ≪90% removal). This riverine contribution could potentially ... Article in Journal/Newspaper Arctic Archipelago Arctic Canadian Arctic Archipelago Institut national des sciences de l'Univers: HAL-INSU Arctic Canadian Arctic Archipelago Earth and Planetary Science Letters 578 117341 |