Articles | Volume 11, issue 24
Research article
17 Dec 2014
Research article |  | 17 Dec 2014

Identifying vital effects in Halimeda algae with Ca isotopes

C. L. Blättler, S. M. Stanley, G. M. Henderson, and H. C. Jenkyns


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Latest update: 09 Dec 2023
Short summary
Halimeda algae were used as a test organism to untangle some of the specific factors that influence skeletal composition, in particular Ca-isotope composition. Algae were stimulated to precipitate both calcite and aragonite by growth in artificial Cretaceous seawater. Comparison of the skeletal Ca-isotope ratios with inorganic carbonate forms indicates the effects of mineralogy and Rayleigh distillation of Ca on the geochemistry of their carbonate skeletons.
Final-revised paper