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A study of iron-bearing rutiles in the paragenesis TiO2-Al2O3-P2O5-SiO2

Published online by Cambridge University Press:  05 July 2018

A. Putnis  and
M. M. Wilson
A. Putnis
Affiliation:
Department of Mineralogy and Petrology, University of Cambridge, Downing Place, Cambridge CB2 3EW
M. M. Wilson
Affiliation:
Department of Geology and Mineralogy, University of Queensland, St. Lucia, Queensland 4067
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Summary

Hydrothermal ruffles from a suite of rocks at Mount Perry, Queensland, have been studied in thin section, by electron microprobe analysis, and by transmission electron microscopy. The iron-bearing rutiles, while originally singte-phase, are found to exsolve a sequence of iron-rich precipitates on experimental annealing, with hematite being formed as the stable equilibrium precipitate. Experiments at different temperatures and annealing times enable a time-temperature-transformation plot to be drawn for the exsolution process. The kinetics of this process are used to conclude that the rutiles formed below about 450 °C.

Type
Research Article
Information
Mineralogical Magazine , Volume 42 , Issue 322 , June 1978 , pp. 255 - 263
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1978

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