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Titanomagnetites from a differentiation sequence, analcime-olivine theralite to analcime-tinguaite

Published online by Cambridge University Press:  14 March 2018

J. F. G. Wilkinson
J. F. G. Wilkinson*
Affiliation:
Department of Geology, The University of New England, Armidale, New South Wales.
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Summary

Six titanomagnetites from a differentiated alkaline intrusion have been studied using microscopie, chemical, and X-ray techniques. The titanomagnetites are homogeneous; with differentiation their FeO and TiO2 contents decrease, and Fe2O3 increases. The titanomagnetite course of crystallization extends from close to the ulvöspinel-magnetite join, near to ulvöspinel, towards magnetite. The recalculated normative compositions of three titanomagnetites indicate that they are essentially Fe3O4-(γ-FeTiO3)-(γ-Fe2O3)solid solutions. The changing chemistry of the titanomagnetites is ascribed primarily to variations in the chemistry of the magma during differentiation.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 34 , Issue 268 , 1965 , pp. 528 - 541
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1965

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References

Akimoto, (S.), 1954. Journ. Geomagn. Geoelectr., vol. 6, no. 1, p. 1.CrossRefGoogle Scholar
Akimoto, (S.), 1955. Japan Journ. Geophys., vol. 1, no. 2, p. 1.Google Scholar
Akimoto, (S.), Katsura, (T.), and Yoshida, (M.), 1957. Journ. Geomagn. Geoelectr., vol. 9, no. 4, p. 165.CrossRefGoogle Scholar
Basta, (E.Z.), 1957. Min. Mag., vol. 31, p. 43.Google Scholar
Basta, (E.Z.), 1960. Neues Jahrb. Min. Abh., vol. 94, p. 1017. (Festband Ramdohr).Google Scholar
Buddington, (A.F.), Farley, (J.), and Vlisdis, (A.), 1955. Amer. Journ. Sci., vol. 253, p. 497.CrossRefGoogle Scholar
Buddington, (A.F.), 1963. Journ. Petrology, vol. 4, p. 138.CrossRefGoogle Scholar
Hamilton, (I)., 1961. Journ. Geol., vol. 69, p. 321.CrossRefGoogle Scholar
Katsura, (T.) and Kushiro, (I.), 1961. Amer. Min., vol. 46, p. 134.Google Scholar
Kawai, (N.), 1959. 20th Int. Geol. Congr., l l - a , p. 103.Google Scholar
Lindsley, (D.H.), 1962. Carnegie Yearb. 61, p. 100.CrossRefGoogle Scholar
Nagata, (T.), 1962. Proc. Benedum Earth Magn. Syrup., p. 69.Google Scholar
Nicholls, (G.D.), 1955. Phil. Mag., suppl., vol. 4, p. l13 .Google Scholar
Nockolds, (S.R.) and Allen, (R.), 1954. Geochimica Acta, vol. 5, p. 245.CrossRefGoogle Scholar
Smith, (J.V.) and Gay, (P.), 1958. Min. Mag., vol. 31, p. 744.Google Scholar
Taylor, (R.W.), 1963. Journ. Amer. Ceramic Sot., vol. 46, p. 276.CrossRefGoogle Scholar
Thornton, (C.P.) and Tuttle, (O.F.), 1960. Amer. Journ. Sci., vol. 258, p. 664.CrossRefGoogle Scholar
Verroogen, (J.), 1962. Journ. Geol., vol. 70, p. 168.Google Scholar
Vincent, (E.A.), 1960. Neues Jahrb. Min. Abh., vol. 94, p. 993 (Festband Ramdhohr).Google Scholar
Vincent, (E.A.) and Phillips, (R.), 1954. Geoehimiea Acta, vol. 6, p. 1.Google Scholar
Vincent, (E.A.), Wright, (O. B.), Chavallier, (R.), and Mathieu, (S.), 1957. Min. Mag., vol. 31, p. 624.Google Scholar
Wilkinson, (J. F. G.), 1957. Min. Mag., vol. 31, p. 443.Google Scholar