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Subcalcic, Fe-rich amphiboles in meta-dolerites, Glenrock Station, NSW, Australia

Published online by Cambridge University Press:  05 July 2018

R. Offler
R. Offler*
Affiliation:
Department of Geology, University of Newcastle, NSW, Australia 2308
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Abstract

Sub-greenschist facies metamorphism has produced unusual subcalcic, Fe-rich actinolitic amphiboles in meta-dolerites from the Glenrock Station area, NSW. They show edenite, riebeckite, ferri-tschermakite and Ti-tschermakite coupled substitutions. Their high Fe content is attributed to high aFe2+ and aFe3+ in the fluid phase produced during the breakdown of clinopyroxene, hornblende, magnetite, and ilmenite. The high aFe2+ led to Fe led to Fe2- occupying the B site, resulting in the formation of subcalcic amphiboles. Variation in aFe2+, aFe3+, aMg, aSi, aAl, and aCa, in different domains resulted in the crystallization of chemically inhomogeneous amphiboles.

Type
Research Article
Information
Mineralogical Magazine , Volume 48 , Issue 346 , March 1984 , pp. 47 - 52
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1984

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References

Bayliss, P. (1975) Can. Mineral. 13, 178–80.Google Scholar
Coombs, D. S., Nakamura, Y., and Vuagnat, M. (1976) J. Petrol. 17, 440–71.CrossRefGoogle Scholar
Crook, K. A. W. (1961) J. Proc. R. Soc. New South Wales. 94, 173–88.Google Scholar
Evarts, R. C. (1979) Geol. Soc. Am. Ann. Meet. San Diego, Progr. Abstr., 422.Google Scholar
Floran, R. J., and Papike, J. J. (1978) J. Petrol. 19, 215–88.CrossRefGoogle Scholar
Hawthorne, F. C. (1981) Mineral. Soc. Am. Rev. in Mineralogy, 9–A, 1–95.Google Scholar
Hynes, A. (1982) Contrib. Mineral. Petrol. 81, 119–25.CrossRefGoogle Scholar
Kawachi, Y. (1975) N.Z. J. Geol. Geophys. 18, 401–41.CrossRefGoogle Scholar
Leake, B. E. (1968) Geol. Soc. Am. Bull. Spec. Paper 98.Google Scholar
Leake, B. E. (1978) Can. Mineral. 16, 501–20.Google Scholar
Offler, R. (1979) Mineral. Mag. 43, 497–503.CrossRefGoogle Scholar
Offler, R. (1982) J. Geol. Soc. Aust. 29, 443–55.CrossRefGoogle Scholar
Offler, R., Baker, C. K., and Gamble, J. (1981) Contrib. Mineral. Petrol. 76, 171–6.CrossRefGoogle Scholar
Reed, S. J. B., and Ware, N. G. (1975) J. Petrol. 16, 499–519.CrossRefGoogle Scholar
Spear, F. S. (1981) Am. J. Sci. 281, 697–734.CrossRefGoogle Scholar
Watanabe, T. (1977) J. Fac. Sci. Hokkaido Univ. ser. iv, 17, 629–94.Google Scholar