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ICP-AES Chemical Analysis of Copper Artefacts from the West of France. Is it possible to point out hoard specific chemical signatures as a function of the region and the metallic group?

Abstract : Chemical analyses of Copper-based artefacts are being performed in the Rennes University follow a strict protocol in order to obtain the best representativity and avoid bias. Firstly, the representativity of each hoard is checked by analysing a a large number of its objects. Then, for each object, several analyses are performed in order to check the metal homogeneity. Thus, it is possible to see if the chemical signatures are really representative of the hoard and therefore if they could be used to trace the material provenance. Several hoards have already been analysed corresponding to two geographic limited areas. The first area is located in the Manche (Normandy, France) and the second one in South of Finistère (Brittany, France). Three hoards contain Armorican-type socketed axes, likely dated from the First Iron Age: Two in Normandy (the Trelly and Agneaux hoards) and one in Brittany (the Kergariou hoard). Two other hoards are located in the carp’s tongue sword horizon, a first one in Normandy (the Surtainville hoard) and the second one in Brittany (the Gouesnac’h hoard). The first results reveal that the chemical signature – based on trace element comparison – of Trelly and Agneaux hoards are quite similar but they differ from the Surtainville hoard, which belongs to the same geographic area but not to the same metallic group. Similarly, the signature of these two hoards is different from the Kergariou hoard, which belongs to the same metallic group but not to the same geographic area. Therefore, the trace element comparison appears as a promising tool for characterizing copper-based artefacts. These prelimanary results have however to be confirmed by studying plano-convex ingots from the Gouesnac’h site.
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-02360777
Contributor : Cécile Le Carlier de Veslud <>
Submitted on : Monday, April 27, 2020 - 10:12:55 AM
Last modification on : Monday, April 27, 2020 - 10:12:55 AM

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  • HAL Id : hal-02360777, version 1

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Cécile Le Carlier de Veslud, Jean-Christophe Le Bannier, Cyril Marcigny, Muriel Fily. ICP-AES Chemical Analysis of Copper Artefacts from the West of France. Is it possible to point out hoard specific chemical signatures as a function of the region and the metallic group?. TESME, Meeting in honour of Salvador Rovira, 2009, Madrid, Spain. ⟨hal-02360777⟩

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