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

Casella, LA and Griesshaber, E and Yin, X and Ziegler, A and Mavromatis, V and Mueller, D and Ritter, A-C and Hippler, D and Harper, E. M. and Dietzel, M and Immenhauser, A and Schoene, BR and Angiolini, L and Schmahl, WW (2017) Experimental diagenesis: insights into aragonite to calcite transformation of Arctica islandica shells by hydrothermal treatment. Biogeosciences, 14. pp. 1461-1492. ISSN 1726-4170, ESSN: 1726-4189 DOI https://doi.org/10.5194/bg-14-1461-2017

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Abstract

Abstract. Biomineralised hard parts form the most important physical fossil record of past environmental conditions. However, living organisms are not in thermodynamic equilibrium with their environment and create local chemical compartments within their bodies where physiologic processes such as biomineralisation take place. In generating their mineralised hard parts, most marine invertebrates produce metastable aragonite rather than the stable polymorph of CaCO3, calcite. After death of the organism the physiological conditions, which were present during biomineralisation, are not sustained any further and the system moves toward inorganic equilibrium with the surrounding inorganic geological system. Thus, during diagenesis the original biogenic structure of aragonitic tissue disappears and is replaced by inorganic structural features.

Item Type: Article
Uncontrolled Keywords: 2017AREP; IA71
Subjects: 04 - Palaeobiology
Divisions: 04 - Palaeobiology
07 - Gold Open Access
Journal or Publication Title: Biogeosciences
Volume: 14
Page Range: pp. 1461-1492
Identification Number: https://doi.org/10.5194/bg-14-1461-2017
Depositing User: Sarah Humbert
Date Deposited: 19 Feb 2018 11:46
Last Modified: 19 Feb 2018 11:46
URI: http://eprints.esc.cam.ac.uk/id/eprint/4103

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