title: Redistribution of uranium by physical processes during weathering and implications for radon production.
abstract: Erosion of the Edale shales of Derbyshire during the Tertiary and Quaternary has resulted in sediment deposits in and on the underlying karstified limestones. Sorting during sedimentation has generated clay-rich sediments which are uranium enriched due to a clay association of uranium in the shales. Radon production in these sediments is at or close to equilibrium with their uranium content, and their fine grain-size ensures efficient radon release. Such sediments are therefore potent local sources of environmental radon.
authors.affiliation: Department of Earth Sciences, University of Leeds, LS2 9JT, Leeds, England.
authors.forename: S H
authors.initials: SH
authors.lastname: Bottrell