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TitleThe role of gamma-ray spectrometry in radon risk evaluation: a case history from Oka, Quebec
AuthorFord, K L; Savard, M; Dessau, J -C; Pellerin, E; Charbonneau, B W; Shives, R B K
SourceGeoscience Canada vol. 28, no. 2, 2001 p. 59-64
LinksAbstract - Résumé
Alt SeriesGeological Survey of Canada, Contribution Series 2000248
ProvinceOntario; Quebec
NTS21E; 21L; 21M; 30; 31; 40; 41
Lat/Long WENS -88.0000 -70.0000 48.0000 42.0000
Subjectsgeophysics; igneous and metamorphic petrology; gamma-ray spectrometers; gamma-ray surveying; gamma-ray surveys, airborne; radon; radioactivity; potassium; uranium; mineral exploration
Illustrationssketches; location maps; geological sketch maps; tables; bar graphs
AbstractIncreasing eU concentrations, as measured by an airborne gamma-ray spectrometry survey, show a progressive and clear association with increasing indoor radon concentrations for an area near Oka, Quebec. The lowest average indoor radon concentrations (106 Bq/m3) are associated with the lowest average eU concentrations (1 ppm), and the highest average indoor radon concentrations (1075 Bq/m3) are associated with the highest eU concentrations (6 ppm). The results of the airborne gamma-ray spectrometry survey were used by public health officials to identify specific areas within and near a carbonatite intrusion where there is a risk of overexposure to indoor radon. The clear association between high eU concentrations and high radon in homes provided invaluable information for a number of land use and public health initiatives. The irrefutable association between high eU concentrations measured by airborne gamma-ray spectrometry and high radon concentrations makes airborne gamma-ray spectrometry a very effective predictive tool for the identification of areas with potential risk of overexposure to indoor radon, including areas without residential development.