Encyclopedia of Scientific Dating Methods

Living Edition
| Editors: W. Jack Rink, Jeroen Thompson

Radiocarbon Dating of Marine Carbonates

Living reference work entry
DOI: https://doi.org/10.1007/978-94-007-6326-5_151-1

Definition

Contaminant: Carbon-containing materials that do not originally belong to the sample.

Pretreatment: A process applying physical and chemical treatments to remove contaminants.

Contamination and Sample Pretreatment

Marine carbonates such as shells and corals mainly consist of aragonite. Before samples are processed for radiocarbon dating, all contaminants must be removed; otherwise the determination of correct radiocarbon ages may not be achieved. Contaminants are derived from the surrounding environment if samples were buried in soils or sediments (e.g., secondary carbonates derived from groundwater and recrystallization of sample carbonate due to chemical exchange between the sample and the surrounding environment). These carbonate contaminants are mostly in the form of calcite. Contaminants can also be conservation materials in the case of museum specimens. Contamination cannot always be seen by naked eye. In such cases, samples should be screened for secondary carbonates...

Keywords

Dissolve Inorganic Carbon Surface Ocean Reef Flat Accelerator Mass Spectrometry Marine Carbonate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  1. 1.Australian Nuclear Science and Technology OrganisationKirrawee DCAustralia