Sulfate minerals control dissolved rare earth element flux and Nd isotope signature of buoyant hydrothermal plume (EMSO-Azores, 37°N Mid-Atlantic Ridge)
While hydrothermal vents are now thought to be a major source of dissolved iron to the oceans, they have always been considered to be a sink for the dissolved rare-earth elements (DREEs). However, true dissolved REE observations in hydrothermal plumes are still lacking. Here we report for the first...
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Online Access: | https://archimer.ifremer.fr/doc/00456/56733/58511.pdf https://doi.org/10.1016/j.chemgeo.2018.09.021 https://archimer.ifremer.fr/doc/00456/56733/ |
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ftarchimer:oai:archimer.ifremer.fr:56733 2023-05-15T17:25:26+02:00 Sulfate minerals control dissolved rare earth element flux and Nd isotope signature of buoyant hydrothermal plume (EMSO-Azores, 37°N Mid-Atlantic Ridge) Chavagnac, Valerie Ali, Hassan Saleban Jeandel, Catherine Leleu, Thomas Destrigneville, Christine Castillo, Alain Cotte, Laura Waeles, Mathieu Cathalot, Cecile Laes, Agathe Pelleter, Ewan Nonnotte, Philippe Sarradin, Pierre-marie Cannat, Mathilde 2018-11 application/pdf https://archimer.ifremer.fr/doc/00456/56733/58511.pdf https://doi.org/10.1016/j.chemgeo.2018.09.021 https://archimer.ifremer.fr/doc/00456/56733/ eng eng Elsevier Science Bv https://archimer.ifremer.fr/doc/00456/56733/58511.pdf doi:10.1016/j.chemgeo.2018.09.021 https://archimer.ifremer.fr/doc/00456/56733/ 2018 Elsevier B.V. All rights reserved. info:eu-repo/semantics/openAccess restricted use Chemical Geology (0009-2541) (Elsevier Science Bv), 2018-11 , Vol. 499 , P. 111-125 Black smokers Rare earth elements Neodymium isotopes Hydrothermal Sulfate minerals EMSO-Azores text Publication info:eu-repo/semantics/article 2018 ftarchimer https://doi.org/10.1016/j.chemgeo.2018.09.021 2021-09-23T20:31:34Z While hydrothermal vents are now thought to be a major source of dissolved iron to the oceans, they have always been considered to be a sink for the dissolved rare-earth elements (DREEs). However, true dissolved REE observations in hydrothermal plumes are still lacking. Here we report for the first time the DREE concentrations and neodymium isotopic compositions (DεNd) of buoyant hydrothermal fluids at Lucky Strike (Mid-Atlantic Ridge). We find that 27 to 62% of total hydrothermal DREEs are rapidly scavenged by anhydrite precipitation at the onset of buoyant plume formation. After this initial loss, all DREEs behave quasi-conservatively within the buoyant plume. Dissolved phase εNd (DεNd) in the evolving plume are identical to black smoker DεNd of +9.0 and contrast radically with DεNd of the local deep water mass at −12.0. Plume DεNd as low as +6.6 may be reconciled by dissolution of newly formed barite in the local environment and carrying seawater DεNd signature. We find, based on the first plume DREE observations, that hydrothermal plumes are in fact a source of DREE to the North Atlantic Deep Water. Precipitation/dissolution processes of hydrothermally-derived minerals, i.e. sulfates in the buoyant plume and Fe oxy-hydroxide in the non-buoyant plume, will likely affect the fate of other trace metals and their isotopic composition. Article in Journal/Newspaper North Atlantic Deep Water North Atlantic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Mid-Atlantic Ridge Chemical Geology 499 111 125 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Black smokers Rare earth elements Neodymium isotopes Hydrothermal Sulfate minerals EMSO-Azores |
spellingShingle |
Black smokers Rare earth elements Neodymium isotopes Hydrothermal Sulfate minerals EMSO-Azores Chavagnac, Valerie Ali, Hassan Saleban Jeandel, Catherine Leleu, Thomas Destrigneville, Christine Castillo, Alain Cotte, Laura Waeles, Mathieu Cathalot, Cecile Laes, Agathe Pelleter, Ewan Nonnotte, Philippe Sarradin, Pierre-marie Cannat, Mathilde Sulfate minerals control dissolved rare earth element flux and Nd isotope signature of buoyant hydrothermal plume (EMSO-Azores, 37°N Mid-Atlantic Ridge) |
topic_facet |
Black smokers Rare earth elements Neodymium isotopes Hydrothermal Sulfate minerals EMSO-Azores |
description |
While hydrothermal vents are now thought to be a major source of dissolved iron to the oceans, they have always been considered to be a sink for the dissolved rare-earth elements (DREEs). However, true dissolved REE observations in hydrothermal plumes are still lacking. Here we report for the first time the DREE concentrations and neodymium isotopic compositions (DεNd) of buoyant hydrothermal fluids at Lucky Strike (Mid-Atlantic Ridge). We find that 27 to 62% of total hydrothermal DREEs are rapidly scavenged by anhydrite precipitation at the onset of buoyant plume formation. After this initial loss, all DREEs behave quasi-conservatively within the buoyant plume. Dissolved phase εNd (DεNd) in the evolving plume are identical to black smoker DεNd of +9.0 and contrast radically with DεNd of the local deep water mass at −12.0. Plume DεNd as low as +6.6 may be reconciled by dissolution of newly formed barite in the local environment and carrying seawater DεNd signature. We find, based on the first plume DREE observations, that hydrothermal plumes are in fact a source of DREE to the North Atlantic Deep Water. Precipitation/dissolution processes of hydrothermally-derived minerals, i.e. sulfates in the buoyant plume and Fe oxy-hydroxide in the non-buoyant plume, will likely affect the fate of other trace metals and their isotopic composition. |
format |
Article in Journal/Newspaper |
author |
Chavagnac, Valerie Ali, Hassan Saleban Jeandel, Catherine Leleu, Thomas Destrigneville, Christine Castillo, Alain Cotte, Laura Waeles, Mathieu Cathalot, Cecile Laes, Agathe Pelleter, Ewan Nonnotte, Philippe Sarradin, Pierre-marie Cannat, Mathilde |
author_facet |
Chavagnac, Valerie Ali, Hassan Saleban Jeandel, Catherine Leleu, Thomas Destrigneville, Christine Castillo, Alain Cotte, Laura Waeles, Mathieu Cathalot, Cecile Laes, Agathe Pelleter, Ewan Nonnotte, Philippe Sarradin, Pierre-marie Cannat, Mathilde |
author_sort |
Chavagnac, Valerie |
title |
Sulfate minerals control dissolved rare earth element flux and Nd isotope signature of buoyant hydrothermal plume (EMSO-Azores, 37°N Mid-Atlantic Ridge) |
title_short |
Sulfate minerals control dissolved rare earth element flux and Nd isotope signature of buoyant hydrothermal plume (EMSO-Azores, 37°N Mid-Atlantic Ridge) |
title_full |
Sulfate minerals control dissolved rare earth element flux and Nd isotope signature of buoyant hydrothermal plume (EMSO-Azores, 37°N Mid-Atlantic Ridge) |
title_fullStr |
Sulfate minerals control dissolved rare earth element flux and Nd isotope signature of buoyant hydrothermal plume (EMSO-Azores, 37°N Mid-Atlantic Ridge) |
title_full_unstemmed |
Sulfate minerals control dissolved rare earth element flux and Nd isotope signature of buoyant hydrothermal plume (EMSO-Azores, 37°N Mid-Atlantic Ridge) |
title_sort |
sulfate minerals control dissolved rare earth element flux and nd isotope signature of buoyant hydrothermal plume (emso-azores, 37°n mid-atlantic ridge) |
publisher |
Elsevier Science Bv |
publishDate |
2018 |
url |
https://archimer.ifremer.fr/doc/00456/56733/58511.pdf https://doi.org/10.1016/j.chemgeo.2018.09.021 https://archimer.ifremer.fr/doc/00456/56733/ |
geographic |
Mid-Atlantic Ridge |
geographic_facet |
Mid-Atlantic Ridge |
genre |
North Atlantic Deep Water North Atlantic |
genre_facet |
North Atlantic Deep Water North Atlantic |
op_source |
Chemical Geology (0009-2541) (Elsevier Science Bv), 2018-11 , Vol. 499 , P. 111-125 |
op_relation |
https://archimer.ifremer.fr/doc/00456/56733/58511.pdf doi:10.1016/j.chemgeo.2018.09.021 https://archimer.ifremer.fr/doc/00456/56733/ |
op_rights |
2018 Elsevier B.V. All rights reserved. info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1016/j.chemgeo.2018.09.021 |
container_title |
Chemical Geology |
container_volume |
499 |
container_start_page |
111 |
op_container_end_page |
125 |
_version_ |
1766116867437494272 |