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| Titel |
Confocal Raman microscope mapping as a tool to describe different mineral and organic phases at high spatial resolution within marine biogenic carbonates: case study on Nerita undata (Gastropoda, Neritopsina) |
| VerfasserIn |
G. Nehrke, J. Nouet |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 8, no. 12 ; Nr. 8, no. 12 (2011-12-20), S.3761-3769 |
| Datensatznummer |
250006255
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| Publikation (Nr.) |
 copernicus.org/bg-8-3761-2011.pdf |
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| Zusammenfassung |
| Marine biogenic carbonates formed by invertebrates (e.g. corals and mollusks) represent complex composites of one or more mineral phases and
organic molecules. This complexity ranges from the macroscopic structures
observed with the naked eye down to sub micrometric structures only revealed
by micro analytical techniques. Understanding to what extent and how
organisms can control the formation of these structures requires that the
mineral and organic phases can be identified and their spatial distribution
related. Here we demonstrate the capability of confocal Raman microscopy
applied to cross sections of a shell of Nerita undata to describe the distribution of
calcite and aragonite including their crystallographic orientation with high
lateral resolution (~300 nm). Moreover, spatial distribution of
functional groups of organic compounds can be simultaneously acquired,
allowing to specifically relate them to the observed microstructures. The
data presented in this case study highlights the possible new contributions
of this method to the description of modalities of Nerita undata shell formation, and
what could be expected of its application to other marine biogenic
carbonates. Localization of areas of interest would also allow further
investigations using more localized methods, such as TEM that would provide
complementary information on the relation between organic molecules and
crystal lattice. |
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