title: A case study of the ambient oxidation of two zinc-lead (sulphide) reference ores.
abstract: The history of two lead-zinc (sulphide) reference ores is presented to show quantitatively the serious effects of ambient oxidation on unprotected samples. This study should serve as a warning to the users and producers of sulphide-bearing reference ores and concentrates. Suggestions are given for overcoming or diminishing the oxidation problem.
authors.affiliation: Canada Centre for Mineral and Energy Technology, Mineral Sciences Laboratories, Department of Energy, Mines and Resources, Ottawa, Canada K1A 0G1.
authors.forename: G H
authors.initials: GH
authors.lastname: Faye
authors.forename: H F
authors.initials: HF
authors.lastname: Steger