Estimating the Age of Lime Mortars by Luminescence to Measure Pollution Rates

Abstract:

Lime mortars can suffer alterations when subjected to gaseous pollutants. Particulate air pollutants can also be deposited and incorporated to the mortar surfaces. Thus, they can be used as pollution tracers allowing us to measure deposition rates of pollutants to compare pollution loads. To calculate deposition rates the absolute age of the studied mortars must be known. Luminescence dating allows estimating the age of lime mortars but involves some partially unsolved problems. Luminescence yields the age of an object from the ratio between paleodose or cumulative radiation dose in the minerals of that object and the annual dose rate of ionizing radiation. The development of optically stimulated luminescence (OSL) in the last years and the application of statistical tools have resulted in the first dating of lime mortars. In this work mortars from old buildings and have been collected from two urban sites (A Coruña, Spain, and Braga, Portugal) to estimate their ages by luminescence. Thus, the mortars could be used as passive samplers to calculate deposition rates and relate these to different pollution loads. Results show partial successful estimates and some related problems in younger mortars are discussed.

• Periodical: Materials Science Forum (Volumes 730-732)
• Pages: 598-603
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.730-732.598
• Online since: November 2012
• Authors: Jorge Sanjurjo-Sánchez, Carlos Alves, D. Lobarinhas
• Keywords: Air Pollution, Built Environment, Lime Mortar, Luminescence Dating

References

[1] J. Sanjurjo-Sánchez, J.R. Vidal-Romani, C.A.S. Alves, D. Fernández-Mosquera Origin of gypsum-rich coatings on Historic Buildings. Water, Air Soil Pollut. 204 (2009) 53-68.

DOI: 10.1007/s11270-009-0025-9

[2] J. Heinemeier, H. Jungner, A. Lindroos, A. Ringbom, T. von Konow, N. Rud, AMS 14C dating of lime mortar, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 123 (1997) 487-495.

DOI: 10.1016/s0168-583x(96)00705-7

[3] C. Goedicke, Dating historical calcite mortar by blue OSL: results from known age samples, Radiation Measurements 37 (2003) 409-415

DOI: 10.1016/s1350-4487(03)00010-6

[4] M.J. Aitken, Thermoluminescence dating, Academic Press, London, 1985.

[5] P. Guibert, F. Bechtel, M. Shvoerer, P. Müller, S. Balescu, A new method for gamma dose-rate estimation of heterogeneous media in TL dating. Radiation Measurements 29 (1998) 561-572.

DOI: 10.1016/s1350-4487(98)00069-9

[6] J.K. Feathers, J. Johnson, S.R. Kembei, Luminescence Dating of Monumental Stone Architecture at Chavín De Huántar, Perú, J. Archaeol. Method Theory 15 (2008) 266–296.

DOI: 10.1007/s10816-008-9053-9

[7] L. Boetter-Jensen, S. Solongo, A.S. Murray, D. Banerjee, H. Jungner, Using the OSL single-aliquot regenerative-dose protocol with quartz extracted from building materials in retrospective dosimetry, Radiation Measurements 32 (2000) 841–845.

DOI: 10.1016/s1350-4487(99)00278-4

[8] J. Ollerhead, Light transmittance through dry, sieved sand: some test results, Ancient TL 19 (2001) 13–16.

[9] A.S. Murray, A.G. Wintle, Luminescence dating of quartz using an improved single-aliquot regenerative-dose protocol, Radiation Measurements 32 (2000) 57-73.

DOI: 10.1016/s1350-4487(99)00253-x

[10] J. Wallinga, On The Detection Of OSL Age Overestimation Using Single-Aliquot Techniques, Geochronometria 21 (2002) 17-26

[11] H.M. Roberts, A. Wintle, Equivalent dose determinations for polymineralic fine-grains using the SAR protocol: application to a Holocene sequence of Chinese Loess Plateau, Quaternary Science Reviews 20 (2001) 859-863

DOI: 10.1016/s0277-3791(00)00051-2

[12] G. Adamiec, M. Aitken, Dose-rate conversion factors: update, Ancient TL 16 (1998) 37-50.

[13] B.J. Brennan, R.G. Lyons, S.W. Phillips, Attenuation of alpha particle track dose for spherical grains, Nuclear Tracks and Radiation Measurements 18 (1991) 249-253

DOI: 10.1016/1359-0189(91)90119-3

[14] V. Mejdahl, Internal radioactiviy in quartz and feldspar grains, Ancient TL 5 (1987) 10-17.

[15] V. Mejdahl, Feldspar inclusion dating of ceramics and burnt stones, PACT 9 (1983) 351-364.