Articles | Volume 20, issue 24
https://doi.org/10.5194/bg-20-5177-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-20-5177-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Impact of seawater sulfate concentration on sulfur concentration and isotopic composition in calcite of two cultured benthic foraminifera
Caroline Thaler
CORRESPONDING AUTHOR
CR2P, UMR 7207, MNHN CNRS SU, 75005 Paris, France
MCAM, UMR 7245, MNHN CNRS, 75005 Paris, France
Guillaume Paris
Université de Lorraine-CNRS, CRPG UMR 7358, 54000 Nancy, France
Marc Dellinger
MCAM, UMR 7245, MNHN CNRS, 75005 Paris, France
Delphine Dissard
LOCEAN UMR 7159 IRD SU CNRS MNHN, 75005 Paris, France/Nouméa, New Caledonia
Sophie Berland
BOREA, UMR 8067, MNHN CNRS SU, 75005 Paris, France
Arul Marie
MCAM, UMR 7245, MNHN CNRS, 75005 Paris, France
Amandine Labat
MCAM, UMR 7245, MNHN CNRS, 75005 Paris, France
Annachiara Bartolini
CR2P, UMR 7207, MNHN CNRS SU, 75005 Paris, France
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Guillaume Paris, Caroline Thaler, Marc Dellinger, Jérôme Aléon, Smail Mostefaoui, Alice Aléon-Toppani, Claire Rollion-Bard, David Troadec, Guillaume Yangshu Wang, and Annachiara Bartolini
EGUsphere, https://doi.org/10.5194/egusphere-2026-1505, https://doi.org/10.5194/egusphere-2026-1505, 2026
This preprint is open for discussion and under review for Biogeosciences (BG).
Short summary
Short summary
To understand sulfate incorporation in the calcitic tests of foraminifera, we grew specimens with labeled sulfur. We documented sulfur, magnesium, phosphorus and calcium distribution across the cell, together with the ultrastructure of the test. S, P and Mg often co-occur and are particularly concentrated in organic linings near amorphous blocks. Strong biological control of those three elements play a role in amorphous calcium carbonate formation and its evolution to calcite.
Guillaume Paris, Caroline Thaler, Marc Dellinger, Jérôme Aléon, Smail Mostefaoui, Alice Aléon-Toppani, Claire Rollion-Bard, David Troadec, Guillaume Yangshu Wang, and Annachiara Bartolini
EGUsphere, https://doi.org/10.5194/egusphere-2026-1505, https://doi.org/10.5194/egusphere-2026-1505, 2026
This preprint is open for discussion and under review for Biogeosciences (BG).
Short summary
Short summary
To understand sulfate incorporation in the calcitic tests of foraminifera, we grew specimens with labeled sulfur. We documented sulfur, magnesium, phosphorus and calcium distribution across the cell, together with the ultrastructure of the test. S, P and Mg often co-occur and are particularly concentrated in organic linings near amorphous blocks. Strong biological control of those three elements play a role in amorphous calcium carbonate formation and its evolution to calcite.
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Short summary
Our study focuses on one of the most used microfossils in paleoenvironmental reconstructions: foraminifera. We set up a novel approach of long-term cultures under variable and controlled conditions. Our results highlight that foraminiferal tests can be used as a unique record of both SO42−/CaCO3 and δ34S seawater variation. This establishes geological formations composed of biogenic carbonates as a potential repository of paleoenvironmental seawater sulfate chemical and geochemical variation.
Our study focuses on one of the most used microfossils in paleoenvironmental reconstructions:...
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