<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>In the last years the mortar dating through Optically Stimulated Luminescence (OSL) techniques has become a viable support for chronological estimations (date of construction or restoration episodes) of historical buildings. However, the dating of mortar has still open issues mainly regarding the assessment of the bleaching degree of quartz, the analysis of the OSL processes for this type of samples and the need to do appropriate tests for the most correct evaluation of the equivalent dose. This paper discusses the results obtained by OSL dating (blue diode stimulation) on the polymineral fine grain phase, enriched in quartz, extracted from lime mortar samples collected from different sites. Thermal transfer effects, through the behaviour of Equivalent Dose (ED) and recovery tests, degree and time of bleaching were studied. For each mortar sample the adjacent brick was collected; in some cases, sampling of the bricks bracketing a mortar layer was a possibility, thus obtaining a direct comparison with the standard thermoluminescence (TL) dating on the bricks.</p><p>The results obtained show, for this set of samples, the possibility of dating the mortars through the use of the fine grain fraction provided of a suitable chemical-physical preparation procedure and the verification of the bleaching conditions.</p></abstract>

In the last years the mortar dating through Optically Stimulated Luminescence (OSL) techniques has become a viable support for chronological estimations (date of construction or restoration episodes) of historical buildings. However, the dating of mortar has still open issues mainly regarding the assessment of the bleaching degree of quartz, the analysis of the OSL processes for this type of samples and the need to do appropriate tests for the most correct evaluation of the equivalent dose. This paper discusses the results obtained by OSL dating (blue diode stimulation) on the polymineral fine grain phase, enriched in quartz, extracted from lime mortar samples collected from different sites. Thermal transfer effects, through the behaviour of Equivalent Dose (ED) and recovery tests, degree and time of bleaching were studied. For each mortar sample the adjacent brick was collected; in some cases, sampling of the bricks bracketing a mortar layer was a possibility, thus obtaining a direct comparison with the standard thermoluminescence (TL) dating on the bricks.The results obtained show, for this set of samples, the possibility of dating the mortars through the use of the fine grain fraction provided of a suitable chemical-physical preparation procedure and the verification of the bleaching conditions.

Historical mortars dating from OSL signals of fine grain fraction enriched in quartz

PH3DRA Laboratories (Physics for Dating Diagnostic Dosimetry Research and Applications), Dipartimento di Fisica e Astronomia, Università di Catania & INFN Sezione di Catania, Via Santa Sofia 64, 95123, Catania, Italy

Earth Sciences Dep., Faculty of Science and Technology, University of Coimbra, IMAR-CMA, Rua Sílvio Lima, 3030-790, Coimbra, Portugal

Laboratorio di Fisica e Tecnologie relative — UniNetLab, Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Viale delle Scienze, Edificio 18, 90128, Palermo, Italy

Geochronometria

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

In the last years the mortar dating through Optically Stimulated Luminescence (OSL) techniques has become a viable support for chronological estimations (date...

Historical mortars dating from OSL signals of fine grain fraction enriched in quartz

Pubblicato online: 19 giu 2013

Pagine: 153 - 164

DOI: https://doi.org/10.2478/s13386-013-0107-8

Parole chiave
historical mortars, luminescence dating, partial bleaching test, preheating test, age model

© 2012 Silesian University of Technology, Gliwice, Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Historical mortars dating from OSL signals of fine grain fraction enriched in quartz

Pubblicato online: 19 giu 2013

Pagine: 153 - 164

DOI: https://doi.org/10.2478/s13386-013-0107-8

Parole chiavehistorical mortars, luminescence dating, partial bleaching test, preheating test, age model

© 2012 Silesian University of Technology, Gliwice, Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Parole chiave
historical mortars, luminescence dating, partial bleaching test, preheating test, age model