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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/32744
Alteration and Contamination of Archaeological Ceramics: the Perturbation Problem
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Alteration and contamination processes modify the chemical composition of ceramic artefacts. This is not restricted solely to the affected elements, but also affects general concentrations. This is due to the compositional nature of chemical data, enclosed by the restriction of unit sum. Since it is impossible to know prior to data treatment whether the original compositions have been changed by such processes, the methodological approach used in provenance studies must be robust enough to handle materials that might have been altered or contaminated. The ability of the logratio transformation proposed by Aitchison to handle compositional data is studied and compared with that of present data treatments. The logaratio transformation appears to offer the most robust approach
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BUXEDA I GARRIGÓS, Jaume. Alteration and Contamination of Archaeological Ceramics: the Perturbation Problem. Journal of Archaeological Science. 1999. Vol. 26, num. 295-313. ISSN 0305-4403. [consulted: 13 of October of 2026]. Available at: https://hdl.handle.net/2445/32744