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

Casella, Laura A.; He, Sixin; Griesshaber, Erika; Fernández-Díaz, Lourdes; Greiner, Martina; Harper, Elizabeth M.; Jackson, Daniel J.; Ziegler, Andreas; Mavromatis, Vasileios; Dietzel, Martin; Eisenhauer, Anton; Veintemillas-Verdaguer, Sabino; Brand, Uwe; Schmahl, Wolfgang W.

doi:https://doi.org/10.5194/bg-15-7451-2018

Articles | Volume 15, issue 24

https://doi.org/10.5194/bg-15-7451-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-15-7451-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 15, issue 24

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, Sixin He, Erika Griesshaber, Lourdes Fernández-Díaz, Martina Greiner, Elizabeth M. Harper, Daniel J. Jackson, Andreas Ziegler, Vasileios Mavromatis, Martin Dietzel, Anton Eisenhauer, Sabino Veintemillas-Verdaguer, Uwe Brand, and Wolfgang W. Schmahl

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Final revised paper (published on 21 Dec 2018)
Preprint (discussion started on 10 Jul 2018)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC1: 'Review', Anonymous Referee #1, 25 Jul 2018
- AC1: 'Authors´ comments to RC1', Laura A. Casella, 15 Oct 2018
- AC4: 'Revised manuscript', Laura A. Casella, 15 Oct 2018
- AC5: 'Revised manuscript with changes tracked', Laura A. Casella, 15 Oct 2018
- AC6: 'Letter to the editor', Laura A. Casella, 15 Oct 2018
RC2: 'Comments to bg-2018-249', Anonymous Referee #2, 26 Jul 2018
- AC2: 'Authors´ comments to RC2', Laura A. Casella, 15 Oct 2018
RC3: 'Review of Casella, et al.', Anonymous Referee #3, 01 Aug 2018
- AC3: 'Authors´ comments to RC3', Laura A. Casella, 15 Oct 2018

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 Laura A. Casella on behalf of the Authors (08 Nov 2018)

ED: Publish as is (16 Nov 2018) by Lennart de Nooijer

AR by Laura A. Casella on behalf of the Authors (25 Nov 2018)

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.