Naslov
Results and findings from an international mortar dating intercomparison MODIS2

Autori
Scott, M. ; Lindroos, A. ; Barrett, G. ; Boudin, M. ; Hajdas, I. ; Olsen, J. ; Maspero, F. ; Marzaioli, F. ; Michalska, D. ; Moreau, C. Sironić, A. ; Pawelczyk, F.

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Skup
24th Radiocarbon Conference, 10th 14C & Archaeology Conference

Mjesto i datum
Zürich, Švicarska, 11.09.2022. - 16.09.2022

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
MODIS2, radiocarbon dating, mortar intercomparison

Sažetak
Dating of mortars remains an undertaking which a relatively small number of laboratories are engaged in. At the same there have been developments of different pre‐treatment methods, dating of different fractions etc., all of which have the potential to contribute to variability observed in dating results. It is in this context that a further mortar dating intercomparison has been undertaken. Three samples from the “International mortar dating” (www.mortardating.com) projects´ sample collection were selected for this inter‐comparison study. The consensus was that the samples should represent different chronologies and typologies and come from geographically different regions and have known ages. Because of the large number of laboratories participating in the inter‐ comparison, the main sample selection criterion turned out to be the size of the samples available. The age of the youngest sample is well known and the age of the two others is known from earlier 14C dating of mortar, and their context. Before distribution, the samples were split into pieces and each laboratory received one piece of each sample for characterization of the mortar. The remainder of each sample was crushed further with plastic covered pliers and sieved in a mechanically vibrated sieve series for 15 min where after the <150 micrometer (µm) grain‐size fraction was collected and homogenized by shaking. Each laboratory received approximately 1000 mg of the fraction in a small glass vial. The results from the intercomparison and their analysis will be presented, focusing on the variations observed and their potential attribution.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Interdisciplinarne prirodne znanosti, Arheologija

POVEZANOST RADA