PIXE analyses over a long period: The case of Neolithic variscite jewels from Western Europe (5th-3th millennium BC)

Guirec Querré (1, 2) , Thomas Calligaro (3) , Salvador Domínguez-Bella (4) , Serge Cassen (1, 5)

1 CReAAH - Centre de Recherche en Archéologie, Archéosciences, Histoire
2 MC - Ministère de la Culture
3 C2RMF - Centre de recherche et de restauration des musées de France
4 Departamento de Ciencias de la Tierra de la UCA
5 LARA - Laboratoire de recherche ARchéologie et Architecture

PIXE analysis of archeological variscite beads and pendants from the Neolithic period that were excavated in Spain, Portugal and France and of variscite geological references samples from European occurrences were carried out from 1999 to 2013 in order to trace back the circulation of this precious gemstone over three millennia. Transformations of the AGLAE external beam system and progress in spectrum processing have induced some apparent compositional variation, affecting in particular the phosphorus/aluminum ratio. This long term evolution has been taken into account with the help of geostandards to build a large and coherent geochemical database of minor and trace elements in variscite. This database allowed us to determine the provenance of the raw material and thus of the circulation of the jewels.

Mots clés: PIXE; Variscite; Calibration; Provenance; Prehistory

Domaines: Archéologie et Préhistoire

Guirec Querré, Thomas Calligaro, Salvador Domínguez-Bella, Serge Cassen. PIXE analyses over a long period: The case of Neolithic variscite jewels from Western Europe (5th-3th millennium BC): The case of Neolithic variscite jewels from Western Europe (5th-3th millennium BC). Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2014, 318 (Part A), pp.149-156. ⟨10.1016/j.nimb.2013.07.033⟩. ⟨hal-00932616⟩