Journal article

Towards the use of the coccolith vital effects in palaeoceanography: A field investigation during the middle Miocene in the SW Pacific Ocean

Michael Hermoso, Harry-Luke O Mcclelland, James S Hirst, Fabrice Minoletti, Magali Bonifacie, Rosalind EM Rickaby



Recent culture studies of living coccolithophores have established a biogeochemical framework for the use of the geochemical compositions of their calcite biominerals as proxies in palaeoceanography. Yet, questions remain regarding the transferability of such experimental data to fossil coccoliths. Here we analysed the carbon and oxygen isotopic composition of Miocene coccoliths to assess the suitability of such data for reconstructing the past environment. We found that the oxygen isotopic compositions of the relatively small Noelaerhabdaceae coccoliths gathered in the 3–5 μm fractions appear to be a suitable material to derive temperatures after a correction for a constant vital offset of ..

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Awarded by Fonds National de la Recherche (Luxembourg)

Awarded by French Agence Nationale de la Recherche (ANR)

Awarded by ERC

Funding Acknowledgements

This work used samples provided by the Deep-Sea Drilling Project (DSDP). The authors are very grateful to Liselotte Diester-Haass for providing these samples. M.H. acknowledges funding from the Fonds National de la Recherche (Luxembourg) under grant agreement PDR-08-002 and from the French Agence Nationale de la Recherche (ANR) for grant ANR-17-CE01-0004-01 (project CARCLIM). F.M. and M.H. both acknowledge the Mission pour l'Interdisciplinarit.e of the French Centre National de la Recherche Scientifique (CNRS) for financial support within the D.efi ISOTOP Scheme (project COCCOTOPE). R.R. is grateful to the ERC (Grant SP2-GA-2008-200915) for funding and to the Royal Society for a Wolfson Research Merit Award. We thank Jerry Dickens and two anonymous reviewers for comments that greatly improved our original manuscript. All the numerical data used in this study are available from the PANGEAE website ( searching for the dataset "Isotopic values of seawater and sediment microfractions between 17.4 and 10.9 Ma at DSDP Site 588".