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Mantle-derived sapphirine

Published online by Cambridge University Press:  05 July 2018

W. L. Griffin  and
S. Y. O'Reilly
W. L. Griffin
Affiliation:
Mineralogisk-Geologisk Museum, Sars Gate 1, 0562, Oslo 5, Norway
S. Y. O'Reilly
Affiliation:
School of Earth Sciences, Macquarie University, North Ryde, NSW 2113, Australia
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Abstract

A xenolith from the Delegate breccia pipe (New South Wales, Australia) contains sapphirine in equilibrium with aluminous clinopyroxene, garnet, and plagioclase (An48). This unusual assemblage probably developed from a clinopyroxene (±spinel ± plagioclase) cumulate during cooling from > 1400°C to c. 1000°C at pressures near 15 kbar. The sapphirine is close to the 7:9:3 composition, suggesting that bulk composition is more important than P-T conditions in determining the stoichiometry of natural sapphirines. A similar occurrence of sapphirine has also been recorded in mantlederived xenoliths from the Stockdale kimberlite in Kansas. Re-examination of sapphirine granulites from Finero suggests that their primary assemblages and origin may have been similar to those of the Delegate xenolith. Sapphirine is clearly stable under upper-mantle conditions in Ca-Al-Mg-rich bulk compositions.

Type
Silicate mineralogy
Information
Mineralogical Magazine , Volume 50 , Issue 358 , December 1986 , pp. 635 - 640
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1986

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References

Ackermand, D., Seifert, F., and Schreyer, W. (1975) Contrib. Mineral. Petrol, 50, 79-92.CrossRefGoogle Scholar
Anastasiou, P., and Seifert, F. (1972. Ibid. 34, 272-87.CrossRefGoogle Scholar
Carswell, D.A. (1975) Phys. Chem. Earth, 9, 417-29.CrossRefGoogle Scholar
Ellis, D.J., and Green, D.H. (1979) Contrib. Mineral. Petrol, 71, 13-22.CrossRefGoogle Scholar
Green, D.H. (1966) Earth Planet. Sci. Lett, 1, 414-20.CrossRefGoogle Scholar
Griffin, W.L., Wass, S.Y., and Hollis, J.D. (1984) J. Petrol, 25, 53-87.CrossRefGoogle Scholar
Hensen, B.J., and Green, D.H. (1973) Contrib. Mineral. Petrol, 38, 151-66.CrossRefGoogle Scholar
Irving, A.J. (1974) J. Petrol, 15, 1-40.CrossRefGoogle Scholar
Irving, A.J. (1980) Am. J. Sci, 280-A, 389-426.Google Scholar
Lensch, G. (1971) Contrib. Mineral. Petrol, 31, 145-53.CrossRefGoogle Scholar
Lovering, J.F., and White, A.J.R. (1969) . Ibid. 21, 9-52.Google Scholar
Meyer, H.O.A., and Brookins, G.D. (1976) Am. Mineral, 61, 1194-202.Google Scholar
Monchoux, P. (1972) Contrib. Mineral. Petrol, 37, 47-64.CrossRefGoogle Scholar
O'Reilly, S.Y., and Griffin, W.L. (1985) Tectonophys, 111, 41-63.CrossRefGoogle Scholar
Ozawa, K. (1984) Geochim. Cosmochim. Ada, 48, 2597-612.CrossRefGoogle Scholar
Sackij, V.S., Sobolev, N.V., and Pavljocenko, V.C. (1983) Dokl. Akad. Nauk SSSR, 272, 187-92.Google Scholar
Schreyer, W., and Abraham, K. (1975) Mineral. Mag, 40, 171-80.CrossRefGoogle Scholar
Schreyer, W., and Abraham, K. and Seifert, F. (1969) Am. J. Sci, 267-A, 407-33.CrossRefGoogle Scholar
Seifert, F. (1974) J. Geology, 82, 173-204.CrossRefGoogle Scholar
Sills, J.D., Ackermand, D., Herd, R.K., and Windley, B.F. (1983). J. Met. Geol, 1, 337-51.CrossRefGoogle Scholar
Spera, F.J. (1985) Contrib. Mineral. Petrol, 88, 217-32.CrossRefGoogle Scholar
Taylor, H.C.J. (1973) Geol. Soc. Am. Bull, 84, 1335-48.2.0.CO;2>CrossRefGoogle Scholar
Wass, S.Y., and Irving, A.J. (1976) XENMEG: A catalogue of occurrences of xenoliths and megacrysts in basic volcanic rocks of eastern Australia. Australian Museum, Sydney.Google Scholar
Wilshire, H.G. (1984) Geology, 12, 395-8.2.0.CO;2>CrossRefGoogle Scholar
Wilshire, H.G. and Pike, J.E.N. (1975. Ibid. 3, 467-70.2.0.CO;2>CrossRefGoogle Scholar
Wood, B.J. (1974) Contrib. Mineral. Petrol, 46, 1-15.CrossRefGoogle Scholar
Wood, B.J. (1976) Am. Mineral, 61, 599-602.Google Scholar