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Composition changes in a basalt melt contained in a wire loop of Pt80Rh20: effects of temperature, time, and oxygen fugacity

Published online by Cambridge University Press:  05 July 2018

Colin H. Donaldson*
Affiliation:
Department of Geology, University of St. Andrews, Fife KY16 9ST, Scotland

Summary

Losses of FeO, Na2O, and K2O from an alkali olivine basalt melted above the liquidus temperature in Pt80Rh20 wire loops are reported as a function of temperature, time, and PO2. Increasing temperature and decreasing PO2 increase the losses. Compared to open capsules the wire-loop container reduces FeO loss to a minimum but may exacerbate Na2O loss. Nonetheless for most types of experiment involving melt these losses are acceptable.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1979

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