Articles | Volume 15, issue 24
Biogeosciences, 15, 7451–7484, 2018
Biogeosciences, 15, 7451–7484, 2018

Research article 21 Dec 2018

Research article | 21 Dec 2018

Hydrothermal alteration of aragonitic biocarbonates: assessment of micro- and nanostructural dissolution–reprecipitation and constraints of diagenetic overprint from quantitative statistical grain-area analysis

Laura A. Casella et al.


Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish subject to minor revisions (review by editor) (31 Oct 2018) by Lennart de Nooijer
AR by Anna Wenzel on behalf of the Authors (15 Nov 2018)  Author's response    Manuscript
ED: Publish as is (16 Nov 2018) by Lennart de Nooijer
Short summary
Biogenic carbonates record past environmental conditions. Fossil shell chemistry and microstructure change as metastable biogenic carbonates are replaced by inorganic calcite. Simulated diagenetic alteration at 175 °C of different shell microstructures showed that (nacreous) shell aragonite and calcite were partially replaced by coarse inorganic calcite crystals due to dissolution–reprecipitation reactions. EBSD maps allowed for qualitative assessment of the degree of diagenetic overprint.
Final-revised paper