Multi-proxy assessment of brachiopod shell calcite as a potential archive of seawater temperature and oxygen isotope composition

Letulle, Thomas; Gaspard, Danièle; Daëron, Mathieu; Arnaud-Godet, Florent; Vinçon-Laugier, Arnauld; Suan, Guillaume; Lécuyer, Christophe

doi:https://doi.org/10.5194/bg-20-1381-2023

Articles | Volume 20, issue 7

https://doi.org/10.5194/bg-20-1381-2023

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

https://doi.org/10.5194/bg-20-1381-2023

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

Articles | Volume 20, issue 7

Research article

|

12 Apr 2023

Research article |

| 12 Apr 2023

Multi-proxy assessment of brachiopod shell calcite as a potential archive of seawater temperature and oxygen isotope composition

Thomas Letulle, Danièle Gaspard, Mathieu Daëron, Florent Arnaud-Godet, Arnauld Vinçon-Laugier, Guillaume Suan, and Christophe Lécuyer

Supplement

https://doi.org/10.5194/bg-20-1381-2023-supplement

Data sets

World Ocean Atlas 2018 Ocean Data View https://odv.awi.de/data/ocean/world-ocean-atlas-2018/

Model code and software

mdaeron/D47crunch: D47crunch v2.0.1 (v2.0.3) M. Daëron https://doi.org/10.5281/zenodo.6300900

IsoplotR P. Vermeesch https://github.com/pvermees/IsoplotR

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Short summary

This paper studies the chemistry of modern marine shells called brachiopods. We investigate the relationship of the chemistry of these shells with sea temperatures to test and develop tools for estimating sea temperatures in the distant past. Our results confirm that two of the investigated chemical markers could be useful thermometers despite some second-order variability independent of temperature. The other chemical markers investigated, however, should not be used as a thermometer.