Radiocarbon Dating of Charcoals from Historical Mortars from Týřov and Pyšolec Castles

0568393 - ÚJF 2023 RIV GB eng C - Conference Paper (international conference)
Pachnerová Brabcová, Kateřina - Krofta, Tomáš - Valášek, Vojtěch - Suchý, Václav - Kundrát, Pavel - Šimek, Pavel - Kozlovcev, Petr - Kotková, Kristýna - Fialová, Anna - Povinec, P. P. - Válek, Jan - Světlík, Ivo
Radiocarbon Dating of Charcoals from Historical Mortars from Týřov and Pyšolec Castles.
Radiation Protection Dosimetry. Vol. 9-11. Oxford: Oxford University Press, 2022, s. 681-686. ISSN 0144-8420.
[Conference Days of Radiation Protection /42./. online (CZ), 08.11.2021-11.11.2021]
R&D Projects: GA MK(CZ) DG20P02OVV028; GA MŠMT EF16_019/0000728
Keywords : radiocarbon dating * charcoals * mass spectrometry
OECD category: Analytical chemistry; Materials engineering (UTAM-F)
https://doi.org/10.1093/rpd/ncac119

Organic inclusions in lime binders provide useful samples for radiocarbon dating in historical objects. Two Czech castles Týřov and Pyšolec from Late Middle Ages were explored, and tens of charcoals were found in their walls. The radiocarbon content of the charcoals was measured with accelerator mass spectrometry. The dating results showed that none of the charcoals were younger than the known historical ages (Týřov: 1260 - 1270, Pyšolec: 1300 - 1340), but some were considerably older. Two charcoals from Pyšolec castle dated to Palaeolithic, likely originating from fluvial sediments added as an aggregate to the mortar. When excluding these two charcoals, the others indicated most likely dates being 50 - 100 y older than the building dates of the castles. This systemic effect corresponds to the age of wood used for lime burning and shall be accounted for when dating mortars using charcoals.
Permanent Link: https://hdl.handle.net/11104/0339700