Quartz and Magnetite: Oxygen-18-Oxygen-16 Fractionation in Metamorphosed Biwabik Iron Formation

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Science  29 Jul 1966:
Vol. 153, Issue 3735, pp. 528-529
DOI: 10.1126/science.153.3735.528


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.

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