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The nature and significance of exsolved phases in some chrome spinels from the Rhum layered intrusion

Published online by Cambridge University Press:  05 July 2018

A. Putnis  and
G. D. Price
A. Putnis
Affiliation:
Mineral Sciences Group, Department of Mineralogy and Petrology, Downing Place Cambridge CB2 3EW
G. D. Price
Affiliation:
Mineral Sciences Group, Department of Mineralogy and Petrology, Downing Place Cambridge CB2 3EW
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Summary

Chrome spinels from seams in the Rhum layered intrusion, Inner Hebrides, generally contain very fine platelets of exsolved phases. Despite the low bulk Ti content (< 1%) of the spinel grains, analytical electron microscopy shows these platelets to be highly enriched in titanium. Electron diffraction indicates the presence of platelets of two different phases, one a magnesian ilmenite, the other a defect spinel intermediate phase. The platelets are the result of oxidation of the spinel at moderate (c. 600 °C) temperatures and their distribution suggests that oxygen fugacity gradients existed across some of the seams.

Type
Research Article
Information
Mineralogical Magazine , Volume 43 , Issue 328 , December 1979 , pp. 519 - 526
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1979

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References

Bøe, (P.), 1978. Can. Mineral. 16, 597-600.Google Scholar
Brown, (G. M.), 1956. Phil. Trans. Roy. Soc. B, 240, 1-53.Google Scholar
Buddington, (A. F.) and Lindsley, (D. H.), 1964. J. Petrol. 5, 310-57.CrossRefGoogle Scholar
Dekker, (E. H. L.) and Rieck, (G. D.), 1974. Rev. lnt. Hautes Temp. Refract. 11, 187-92.Google Scholar
Greskovitch, (C.) and Stubican, (V. S.), 1968. J. Am. Ceram. Soc. 51, 42-6.CrossRefGoogle Scholar
Henderson, (P.), 1975. Geochim. Cosmochim. Acta,. 39, 1035-44.CrossRefGoogle Scholar
Henderson, (P.) and Suddaby, (P.), 1971. Contrib. Mineral. Petrol. 33, 21-31.CrossRefGoogle Scholar
Katsura, (T.) and Muan, (A.), 1964. Trans. Am. Inst. Min. Metal. Eng. 230, 77-84.Google Scholar
Lewis, (M. H.), 1969. Phil. Mag. 20, 985-98.CrossRefGoogle Scholar
Lindsley, (D. H.), 1962. Carnegie Inst. Washington Yearb. 61, 100-6.Google Scholar
Lindsley, (D. H.) 1976. In: Oxide Minerals Short Course Notes. Min. Soc. Am.Google Scholar
Lorimer, (G. W.) and Cliff, (G.), 1976. In: Wenk, (H. U.), ed. Electron Microscopy in Mineralogy. Ch. 7.3. Springer-Verlag, Heidelberg.Google Scholar
Price, (G. D.) and Putnis, (A.), 1979. Contrib. Mineral. Petrol. 69, 355 9.CrossRefGoogle Scholar
Putnis, (A.), 1978. Phys. Chem. Minerals,. 3, 183-97.CrossRefGoogle Scholar
Putnis, (A.) 1979. Mineral. Mag. 43, 293-6.CrossRefGoogle Scholar
Turnock, (A. C.) and Eugster, (H. P.), 1962. J. Petrol. 3, 533-65.CrossRefGoogle Scholar
Verhoogen, (J.), 1962. J. Geol. 70, 168-81.CrossRefGoogle Scholar