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Biogeosciences An interactive open-access journal of the European Geosciences Union
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Volume 14, issue 6
Biogeosciences, 14, 1461–1492, 2017
https://doi.org/10.5194/bg-14-1461-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Biogeosciences, 14, 1461–1492, 2017
https://doi.org/10.5194/bg-14-1461-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 24 Mar 2017

Research article | 24 Mar 2017

Experimental diagenesis: insights into aragonite to calcite transformation of Arctica islandica shells by hydrothermal treatment

Laura A. Casella et al.
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ED: Publish subject to minor revisions (Editor review) (26 Jan 2017) by Lennart de Nooijer
AR by Laura A. Casella on behalf of the Authors (02 Feb 2017)  Author's response
ED: Publish as is (23 Feb 2017) by Lennart de Nooijer
Publications Copernicus
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Short summary
Mollusc shells record past environments. Fossil shell chemistry and microstructure change as metastable biogenic aragonite transforms to stable geogenic calcite. We simulated this alteration of Arctica islandica shells by hydrothermal treatments. Below 175 °C the shell aragonite survived for weeks. At 175 °C the replacement of the original material starts after 4 days and yields submillimetre-sized calcites preserving the macroscopic morphology as well as the original internal micromorphology.
Mollusc shells record past environments. Fossil shell chemistry and microstructure change as...
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