Articles | Volume 14, issue 1
Biogeosciences, 14, 89–97, 2017
Biogeosciences, 14, 89–97, 2017

Research article 09 Jan 2017

Research article | 09 Jan 2017

The effect of shell secretion rate on Mg / Ca and Sr / Ca ratios in biogenic calcite as observed in a belemnite rostrum

Clemens Vinzenz Ullmann and Philip A. E. Pogge von Strandmann

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Cited articles

Bailey, T. R., Rosenthal, Y., McArthur, J. M., van de Schootbrugge, B., and Thirlwall, M. F.: Paleoceanographic changes of the Late Pliensbachian-Early Toarcian interval: a possible link to the genesis of an Oceanic Anoxic Event, Earth Planet. Sc. Lett., 212, 307–320,, 2003.
Blainville, M. H. D. de.: Mémoire sur les Bélemnites considerées zoologiquement et géologiquement, 136 pp., Paris, 1827.
Brand, U., Azmy, K., Bitner, M. A., Logan, A., Zuschin, M., Came, R., and Ruggiero, E.: Oxygen isotopes and MgCO3 in brachiopod calcite and a new paleotemperature equation, Chem. Geol., 359, 23–31,, 2013.
Butler, S., Bailey, T. R., Lear, C. H., Curry, G. B., Cherns, L., and McDonald, I.: The Mg ∕ Ca-temperature relationship in brachiopod shells: Calibrating a potential palaeoseasonality proxy, Chem. Geol., 397, 106–117,, 2015.
Chivas, A. R., De Dekker, P., and Shelley, J. M. G.: Magnesium content of non-marine ostracod shells: a new palaeosalinometer and palaeothermometer, Palaeogeogr. Palaeocl., 54, 43–61, 1986.
Short summary
This study documents how much control growth rate has on the chemical composition of fossil shell material. Using a series of chemical analyses of the fossil hard part of a belemnite, an extinct marine predator, a clear connection between the rate of calcite formation and its magnesium and strontium contents was found. These findings provide further insight into biomineralization processes and help better understand chemical signatures of fossils as proxies for palaeoenvironmental conditions.
Final-revised paper