Impact of seawater sulfate concentration on sulfur concentration and isotopic composition in calcite of two cultured benthic foraminifera

Thaler, Caroline; Paris, Guillaume; Dellinger, Marc; Dissard, Delphine; Berland, Sophie; Marie, Arul; Labat, Amandine; Bartolini, Annachiara

doi:https://doi.org/10.5194/bg-20-5177-2023

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.

https://doi.org/10.5194/bg-20-5177-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 20, issue 24

Research article

|

21 Dec 2023

Research article |

| 21 Dec 2023

Impact of seawater sulfate concentration on sulfur concentration and isotopic composition in calcite of two cultured benthic foraminifera

Caroline Thaler, Guillaume Paris, Marc Dellinger, Delphine Dissard, Sophie Berland, Arul Marie, Amandine Labat, and Annachiara Bartolini

Supplement

https://doi.org/10.5194/bg-20-5177-2023-supplement

Model code and software

Thermodynamic and mathematical concepts of CHESS, Technical Report Nr. LHM/RD/98/39 CIG – Ecole des Mines de Paris, Fontainebleau, France J. van der Lee https://chess.geosciences.mines-paristech.fr/presentation-1

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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.