Preparation and Dating of Mortar Samples—Mortar Dating Inter-Comparison Study (MODIS)

Irka Hajdas , Alf Lindroos , Jan Heinemeier , Åsa Ringbom , Filippo Terrasi , Isabella Passariello , Manuela Capano (1) , Gilberto Artioli , Anna Addis , Michele Secco , Danuta Michalska , Fabio Marzaioli , Justyna Czernik , Tomasz Goslar (2) , Roald Hayen , Mark van Strydonck , Laurent Fontaine (3) , Mathieu Boudin , Francesco Maspero , Laura Panzeri , Anna Galli (4) , Petra Urbanová (5) , Pierre Guibert (5)

1 CEREGE - Centre européen de recherche et d'enseignement des géosciences de l'environnement
2 Faculty of Physics
3 KIK-IRPA - Institut Royal du Patrimoine Artistique | Royal Institute for Cultural Heritage
4 IFN - CNR Institute for Photonics and Nanotechnologies
5 IRAMAT-CRP2A - IRAMAT-Centre de recherche en physique appliquée à l’archéologie

Seven radiocarbon laboratories: Åbo/Aarhus, CIRCE, CIRCe, ETHZ, Poznań, RICH, and Milano-Bicocca performed separation of carbonaceous fractions suitable for 14C dating of four mortar samples selected for the MOrtar Dating Inter-comparison Study (MODIS). In addition, optically stimulated luminescence (OSL) analyses were completed by Milano-Bicocca and IRAMAT-CRP2A Bordeaux. Each laboratory performed separation according to laboratory protocol. Results of this first intercomparison show that even though consistent 14C ages were obtained by different laboratories, two mortars yielded ages different than expected from the archaeological context.

Mots clés: 14 C; intercomparison; MODIS; mortar; OSL

Domaines: Matériaux; Archéologie et Préhistoire

Irka Hajdas, Alf Lindroos, Jan Heinemeier, Åsa Ringbom, Filippo Terrasi, et al.. Preparation and Dating of Mortar Samples—Mortar Dating Inter-Comparison Study (MODIS). Radiocarbon, 2017, 8th International Symposium, Edinburgh, 27 June – 1 July, 2016, 59 (6), pp.1845-1858. ⟨10.1017/RDC.2017.112⟩. ⟨hal-01683994⟩