| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Yttrium and rare earth element partitioning in seawaters from the Bay of Bengal
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| Autores: |
Yu, Zhaojie
Colin, Christophe
Douville, Eric
Meynadier, Laure
Duchamp-alphonse, Stephanie
Sepulcre, Sophie
Wan, Shiming
Song, Lina
Wu, Qiong
Xu, Zhaokai
Bassinot, Frank
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| Data: |
2017-04
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| Ano: |
2017
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| Resumo: |
The dissolved Yttrium (Y) and Rare Earth Element (REE) concentrations of seawater samples collected along a north-south hydrological transect within the Bay of Bengal (BoB) have been analyzed to estimate contributions of the Ganges and Brahmaputra (G-B) river inputs to the dissolved REE distribution of the Northern Indian Ocean. Surface water masses of the BoB are characterized by Y/Ho ratios (84) intermediate between the G-B river suspended sediment (41) and water mass from the South Indian Ocean (93). Co-variation of MREE (Middle REE, Sm) and LREE (Light REE, La) concentrations suggests that the dissolved REEs in surface waters (upper 100 m depth) of the BoB (Sm/La = 0.21) appear to derive mainly from the freshwater discharge of the G-B river system. In contrast, values obtained in the intermediate and deep-waters (Sm/La = 0.14) suggest a mixing of dissolved REEs deriving from the release of G-B river suspended particles (Sm/La = 0.16) and the contribution of Antarctic Bottom Water (AABW) (Sm/La = 0.12). Consequently, we propose that MREE/MREE* ratios in the BoB waters could be an accurate proxy to trace lithogenic inputs from the G-B river system. The dissolved and particle re-mineralization Nd fluxes from G-B river system are calculated to constitute about 9% and 4% of the global dissolved river discharge and ‘Boundary inputs' flux. Our estimation indicates that the massive G-B river system inputs could greatly alter the dissolved REEs distribution in the BoB and contribute to the dissolved REEs budget in the ocean
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
https://archimer.ifremer.fr/doc/00377/48845/49277.pdf
https://archimer.ifremer.fr/doc/00377/48845/49279.pdf
DOI:10.1002/2016GC006749
https://archimer.ifremer.fr/doc/00377/48845/
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| Editor: |
Amer Geophysical Union
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| Formato: |
application/pdf
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| Fonte: |
Geochemistry Geophysics Geosystems (1525-2027) (Amer Geophysical Union), 2017-04 , Vol. 18 , N. 4 , P. 1388-1403
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| Direitos: |
2017. American Geophysical Union. All Rights Reserved.
info:eu-repo/semantics/openAccess
restricted use
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