Post-mortem recrystallization of biogenic amorphous calcium carbonate guided by the inherited macromolecular framework

Author:

Stolarski Jarosław,Coronado Ismael,Potocka Marta,Janiszewska Katarzyna,Mazur Maciej,Baronnet Alain,Cruz Juncal A.,Grauby Olivier,Meibom Anders

Abstract

AbstractIn contrast to abiotically formed carbonates, biogenetic carbonates have been observed to be nanocomposite, organo-mineral structures, the basic build-blocks of which are particles of quasi-uniform size (10–100 nm) organized into complex higher-order hierarchical structures, typically with highly controlled crystal-axis alignments. Some of these characteristics serve as criteria for inferring a biological origin and the state of preservation of fossil carbonate materials, and to determine whether the biomineralization process was biologically induced or controlled. Here we show that a calcium storage structure formed by the American lobster, a gastrolith initially consisting of amorphous calcium carbonate (ACC) and amorphous calcium phosphate (ACP), post-mortem can crystallize into (thus secondary) calcite with structural properties strongly influenced by the inherited organic matrix. This secondary calcite meets many structural criteria for biominerals (thus called the biomorphic calcite), but differs in trace element distributions (e.g., P and Mg). Such observations refine the capability to determine whether a fossil carbonates can be attributed to biogenic processes, with implications for the record of life on Earth and other terrestrial planets.

Funder

Narodowe Centrum Nauki

Ministerio de Ciencia, Innovación y Universidades

European Research Council

Publisher

Springer Science and Business Media LLC

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