Quartz and magnetite: oxygen-18-oxygen-16 fractionation in metamorphosed biwabik iron formation.
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.
Perry
E C
EC
Bonnichsen
B
B