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Geothermometry and oxygen barometry using coexisting iron-titanium oxides: a reappraisal

Published online by Cambridge University Press:  05 July 2018

Roger Powell  and
Marjorie Powell
Roger Powell
Affiliation:
Department of Earth Sciences, University of Leeds, Leeds LS2 9JT
Marjorie Powell
Affiliation:
Department of Earth Sciences, University of Leeds, Leeds LS2 9JT
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Summary

Equilibrium thermodynamic methods are used to develop an independent iron-titanium oxide geothermometer and oxygen barometer from the experimental data of Buddington and Lindsley (1964). The geothermometer and oxygen barometer are presented graphically for coexisting ilmenite solid solution and magnetite solid solution in the system FeO-Fe2O3-TiO2. Equations are also given for calculating temperature and oxygen activity for natural coexisting iron-titanium oxides containing other components. Large departures in composition from the system FeO-Fe2O3-TiO3 result in large uncertainties in the calculated temperature and activity of oxygen.

Type
Research Article
Information
Mineralogical Magazine , Volume 41 , Issue 318 , June 1977 , pp. 257 - 263
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1977

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