Articles | Volume 15, issue 16
Research article
20 Aug 2018
Research article |  | 20 Aug 2018

A systematic look at chromium isotopes in modern shells – implications for paleo-environmental reconstructions

Robert Frei, Cora Paulukat, Sylvie Bruggmann, and Robert M. Klaebe

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Cited articles

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Belcher, A. M., Wu, X. H., Christensen, R. J., Hansma, P. K., Stucky, G. D., and Morse, D. E.: Control of crystal phase switching and orientation by soluble mollusc-shell proteins, Nature, 381, 56–58, 1996. 
Bonnand, P., Parkinson, I. J., James, R. H., Karjalainen, A.-M., and Fehr, M. A.: Accurate and precise determination fo stable Cr isotope compositions in carbonates by double spike MC-ICP-MS, J. Anal. Atom. Spectrom., 26, 528–536, 2011. 
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Checa, A.: A new model for periostracum and shell formation in Unionidae (Bivalvia, Mollusca), Tissue Cell, 32, 405–416, 2000. 
Short summary
The reconstruction of paleo-redox conditions of seawater has the potential to link to climatic changes on land and therefore to contribute to our understanding of past climate change. The redox-sensitive chromium isotope system is applied to marine calcifiers in order to characterize isotope offsets that result from vital processes during calcification processes and which can be eventually used in fossil equivalents to reconstruct past seawater compositions.
Final-revised paper