title: Quartz and magnetite: oxygen-18-oxygen-16 fractionation in metamorphosed biwabik iron formation.
abstract: Oxygen-18-oxygen-16 fractionation of coexisting quartz and magnetite from the Biwabik iron formation varies as a function of distance of the sample from an intrusive contact. This isotope fractionation is related to observed mineralogic variations and compared with a theoretical heat-flow model.
authors.forename: E C
authors.initials: EC
authors.lastname: Perry
authors.forename: B
authors.initials: B
authors.lastname: Bonnichsen