title: Radon in groundwaters from Guarany aquifer, South America: environmental and exploration implications.
abstract: Groundwater and sandstone samples were analyzed for radon in Guarany aquifer, Paraná sedimentary basin, South America. The dissolved radon ranged between 3 and 3303pCi/l, being lognormally distributed, with a modal value of 1315pCi/l, and a median value of 330pCi/l. 222Rn leakage experiments for sandstones yielded a theoretical value of 1390pCi/l for 222Rn in water, showing that theoretical modeling can reliably be used to interpret laboratory and field data.
authors.affiliation: Departamento de Petrologia e Metalogenia, Universidade Estadual Paulista (UNESP), Campus de Rio Claro, Av 24-A, No 1515-CP 178, CEP 13506-900, Rio Claro, São Paulo, Brazil. dbonotto@rc.unesp.br
authors.forename: D M
authors.initials: DM
authors.lastname: Bonotto
authors.forename: L
authors.initials: L
authors.lastname: Caprioglio