Introduction of isotopically light barium from the Rainbow hydrothermal system into the deep Atlantic Ocean
Highlights • Negligible Ba removal observed in the Rainbow hydrothermal system. • Insignificant modification of Ba isotope composition of the vent fluid endmember. • Rainbow vent introduces isotopically light Ba (−0.17) to the deep Atlantic Ocean. • Hydrothermal inputs contribute 4.6 ± 2.2 Gmol/yr B...
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ftoceanrep:oai:oceanrep.geomar.de:59601 2024-01-07T09:44:57+01:00 Introduction of isotopically light barium from the Rainbow hydrothermal system into the deep Atlantic Ocean Zhang, Zhouling Zhou, Linbin Chen, Xue-Gang Achterberg, Eric P. Yu, Yang Hathorne, Ed Steiner, Zvi Siebert, Christopher Frank, Martin 2024-01 text other https://oceanrep.geomar.de/id/eprint/59601/ https://oceanrep.geomar.de/id/eprint/59601/1/1-s2.0-S0012821X23004892-main.pdf https://oceanrep.geomar.de/id/eprint/59601/2/1-s2.0-S0012821X23004892-mmc1.xlsx https://oceanrep.geomar.de/id/eprint/59601/3/1-s2.0-S0012821X23004892-mmc2.docx https://doi.org/10.1016/j.epsl.2023.118476 en eng Elsevier https://oceanrep.geomar.de/id/eprint/59601/1/1-s2.0-S0012821X23004892-main.pdf https://oceanrep.geomar.de/id/eprint/59601/2/1-s2.0-S0012821X23004892-mmc1.xlsx https://oceanrep.geomar.de/id/eprint/59601/3/1-s2.0-S0012821X23004892-mmc2.docx Zhang, Z., Zhou, L., Chen, X. G., Achterberg, E. P. , Yu, Y., Hathorne, E. , Steiner, Z. , Siebert, C. and Frank, M. (2024) Introduction of isotopically light barium from the Rainbow hydrothermal system into the deep Atlantic Ocean. Open Access Earth and Planetary Science Letters, 625 . Art.Nr. 118476. DOI 10.1016/j.epsl.2023.118476 <https://doi.org/10.1016/j.epsl.2023.118476>. doi:10.1016/j.epsl.2023.118476 cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed info:eu-repo/semantics/article 1481 ftoceanrep https://doi.org/10.1016/j.epsl.2023.118476 2023-12-11T00:22:40Z Highlights • Negligible Ba removal observed in the Rainbow hydrothermal system. • Insignificant modification of Ba isotope composition of the vent fluid endmember. • Rainbow vent introduces isotopically light Ba (−0.17) to the deep Atlantic Ocean. • Hydrothermal inputs contribute 4.6 ± 2.2 Gmol/yr Ba to the ocean. Abstract The marine barium (Ba) cycle is closely connected to the short-timescale carbon cycle, and Ba serves as a valuable paleo proxy for export production, ocean alkalinity, and terrestrial inputs. However, the marine Ba budget is poorly constrained, particularly regarding the fluxes of hydrothermally sourced Ba, which hinders our understanding of the Ba cycle and use of Ba-based proxies. Recent studies have suggested a modern source-sink imbalance of Ba isotopes in the global ocean, with sources being overall isotopically heavier than the sinks, and the hydrothermal Ba inputs were considered isotopically heavy sources. In this study, we present the first investigation of Ba and its isotopes in a non-buoyant hydrothermal plume based on dissolved and particulate samples collected from the Rainbow hydrothermal vent field on the Mid-Atlantic Ridge. Our data reveal strong hydrothermal signals at near-field stations, as evidenced by helium isotopes, accompanied by elevated concentrations of dissolved and particulate Ba. Dissolved Ba isotope compositions (δ138Ba) in hydrothermally influenced deep waters (∼0.3 ) are lighter than at similar depths of far-field stations (∼0.45 ) in the Atlantic Ocean. The concentrations and isotopic compositions of dissolved and labile particulate Ba in the non-buoyant hydrothermal plume can be explained by conservative mixing between a Ba-enriched hydrothermal component and North Atlantic Deep Water. By extrapolating the correlations to the vent fluid endmember, our results suggest that there is negligible removal of Ba, and insignificant modification of Ba isotopic signatures, from the vent fluid endmember to the non-buoyant hydrothermal plume. This indicates that the ... Article in Journal/Newspaper North Atlantic Deep Water North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Mid-Atlantic Ridge Earth and Planetary Science Letters 625 118476 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Highlights • Negligible Ba removal observed in the Rainbow hydrothermal system. • Insignificant modification of Ba isotope composition of the vent fluid endmember. • Rainbow vent introduces isotopically light Ba (−0.17) to the deep Atlantic Ocean. • Hydrothermal inputs contribute 4.6 ± 2.2 Gmol/yr Ba to the ocean. Abstract The marine barium (Ba) cycle is closely connected to the short-timescale carbon cycle, and Ba serves as a valuable paleo proxy for export production, ocean alkalinity, and terrestrial inputs. However, the marine Ba budget is poorly constrained, particularly regarding the fluxes of hydrothermally sourced Ba, which hinders our understanding of the Ba cycle and use of Ba-based proxies. Recent studies have suggested a modern source-sink imbalance of Ba isotopes in the global ocean, with sources being overall isotopically heavier than the sinks, and the hydrothermal Ba inputs were considered isotopically heavy sources. In this study, we present the first investigation of Ba and its isotopes in a non-buoyant hydrothermal plume based on dissolved and particulate samples collected from the Rainbow hydrothermal vent field on the Mid-Atlantic Ridge. Our data reveal strong hydrothermal signals at near-field stations, as evidenced by helium isotopes, accompanied by elevated concentrations of dissolved and particulate Ba. Dissolved Ba isotope compositions (δ138Ba) in hydrothermally influenced deep waters (∼0.3 ) are lighter than at similar depths of far-field stations (∼0.45 ) in the Atlantic Ocean. The concentrations and isotopic compositions of dissolved and labile particulate Ba in the non-buoyant hydrothermal plume can be explained by conservative mixing between a Ba-enriched hydrothermal component and North Atlantic Deep Water. By extrapolating the correlations to the vent fluid endmember, our results suggest that there is negligible removal of Ba, and insignificant modification of Ba isotopic signatures, from the vent fluid endmember to the non-buoyant hydrothermal plume. This indicates that the ... |
format |
Article in Journal/Newspaper |
author |
Zhang, Zhouling Zhou, Linbin Chen, Xue-Gang Achterberg, Eric P. Yu, Yang Hathorne, Ed Steiner, Zvi Siebert, Christopher Frank, Martin |
spellingShingle |
Zhang, Zhouling Zhou, Linbin Chen, Xue-Gang Achterberg, Eric P. Yu, Yang Hathorne, Ed Steiner, Zvi Siebert, Christopher Frank, Martin Introduction of isotopically light barium from the Rainbow hydrothermal system into the deep Atlantic Ocean |
author_facet |
Zhang, Zhouling Zhou, Linbin Chen, Xue-Gang Achterberg, Eric P. Yu, Yang Hathorne, Ed Steiner, Zvi Siebert, Christopher Frank, Martin |
author_sort |
Zhang, Zhouling |
title |
Introduction of isotopically light barium from the Rainbow hydrothermal system into the deep Atlantic Ocean |
title_short |
Introduction of isotopically light barium from the Rainbow hydrothermal system into the deep Atlantic Ocean |
title_full |
Introduction of isotopically light barium from the Rainbow hydrothermal system into the deep Atlantic Ocean |
title_fullStr |
Introduction of isotopically light barium from the Rainbow hydrothermal system into the deep Atlantic Ocean |
title_full_unstemmed |
Introduction of isotopically light barium from the Rainbow hydrothermal system into the deep Atlantic Ocean |
title_sort |
introduction of isotopically light barium from the rainbow hydrothermal system into the deep atlantic ocean |
publisher |
Elsevier |
publishDate |
1481 |
url |
https://oceanrep.geomar.de/id/eprint/59601/ https://oceanrep.geomar.de/id/eprint/59601/1/1-s2.0-S0012821X23004892-main.pdf https://oceanrep.geomar.de/id/eprint/59601/2/1-s2.0-S0012821X23004892-mmc1.xlsx https://oceanrep.geomar.de/id/eprint/59601/3/1-s2.0-S0012821X23004892-mmc2.docx https://doi.org/10.1016/j.epsl.2023.118476 |
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_relation |
https://oceanrep.geomar.de/id/eprint/59601/1/1-s2.0-S0012821X23004892-main.pdf https://oceanrep.geomar.de/id/eprint/59601/2/1-s2.0-S0012821X23004892-mmc1.xlsx https://oceanrep.geomar.de/id/eprint/59601/3/1-s2.0-S0012821X23004892-mmc2.docx Zhang, Z., Zhou, L., Chen, X. G., Achterberg, E. P. , Yu, Y., Hathorne, E. , Steiner, Z. , Siebert, C. and Frank, M. (2024) Introduction of isotopically light barium from the Rainbow hydrothermal system into the deep Atlantic Ocean. Open Access Earth and Planetary Science Letters, 625 . Art.Nr. 118476. DOI 10.1016/j.epsl.2023.118476 <https://doi.org/10.1016/j.epsl.2023.118476>. doi:10.1016/j.epsl.2023.118476 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.epsl.2023.118476 |
container_title |
Earth and Planetary Science Letters |
container_volume |
625 |
container_start_page |
118476 |
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1787426392802066432 |