Article Dans Une Revue Chemometrics and Intelligent Laboratory Systems Année : 2025

Supervised laser induced breakdown spectroscopy classification for prehistoric chert provenance: A methodological framework

Résumé

The sourcing of lithic artefacts, and in particular chert, is a key proxy for archaeologist to better understand hunter-gatherer populations. The heterogeneous structure of chert samples, low trace element content, and variability of outcrops make the geochemical characterisation a methodological challenge. Laser Induced Breakdown Spectroscopy (LIBS) can overcome the issues of variability by enabling fast and low-cost and nearly non-destructive analysis of samples. This paper presents a protocol for chert sourcing using LIBS, by comparing several supervised classification models and signal pre-processing with two different approaches: a selection of features or the use of broadband spectra, with an example application on marine flysch cherts from the central Pyrenes (France) presenting similar micropaleontological and textural features.

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hal-05073654 , version 1 (19-05-2025)

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Julien Le Guirriec, Jonàs Alcaina-Mateos, Bruno Bousquet, François-Xavier Le Bourdonnec, Marta Sánchez de la Torre. Supervised laser induced breakdown spectroscopy classification for prehistoric chert provenance: A methodological framework. Chemometrics and Intelligent Laboratory Systems, 2025, 263, pp.105411. ⟨10.1016/j.chemolab.2025.105411⟩. ⟨hal-05073654⟩
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