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Electron petrography of high-temperature oxidation in olivine from the Rhum Layered Intrusion

Published online by Cambridge University Press:  05 July 2018

A. Putnis
A. Putnis*
Affiliation:
Department of Mineralogy and Petrology, Downing PlaceCambridge CB2 3EW
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Summary

Electron-microscope observations of the oxidation products of olivine suggest that oxidation results in the formation ofplatelets of an ‘oxidized olivine’ phase, which has a superstructure of the olivine structure. Subsequently this intermediate phase breaks down by a cellular decomposition process to a eutectoidal intergrowth of magnetite and pyroxene. This intergrowth is responsible for the dendritic magnetite inclusions commonly observed in some olivines from Rhum.

Type
Research Article
Information
Mineralogical Magazine , Volume 43 , Issue 326 , June 1979 , pp. 293 - 296
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1979

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