Hostname: page-component-78c5997874-g7gxr Total loading time: 0 Render date: 2024-11-08T05:32:37.894Z Has data issue: false hasContentIssue false
  • English
  • Français

Irish osumilite

Published online by Cambridge University Press:  05 July 2018

G. A. Chinner  and
P. D. Dixon
G. A. Chinner
Affiliation:
Department of Mineralogy and Petrology, Cambridge University
P. D. Dixon
Affiliation:
Department of Mineralogy and Petrology, Cambridge University
Get access Rights & Permissions [Opens in a new window]

Summary

Osumilite of composition closely approaching that of the K,Mg end-member occurs as a significant constituent of tridymite-enstatite-feldspar-cordierite-hematite-magnetite buchites at the contact of the Tertiary dolerite plug of Tieveragh, Co. Antrim; it is proposed that the mineral be known as osumilite-(K,Mg). Despite laboratory demonstration of the metastability of osumilite-(K,Mg) over a wide pressure-temperature range, the unaltered character and apparently constant composition of the Tieveragh osumilites raises the possibility of an osumilite stability field within the system K2O-MgO-FeO-Al2O3-SiO2.

Type
Research Article
Information
Mineralogical Magazine , Volume 39 , Issue 302 , June 1973 , pp. 189 - 192
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1973

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Brown, (G. E.) and Gibbs, (G. V.), 1969. Amer. Min., 54, 101.Google Scholar
Bunch, (T. E.) and Fuchs, (L.), 1969. Ibid. 14.Google Scholar
Forbes, (W. C.), Baur, (W. H.), and Khan, (A. A.), 1972. Ibid. 57, 463.Google Scholar
Khan, (A. A.), Baur, (W. H.), and Forbes, (W. C.), 1972. Acta Cryst., 28, 267.CrossRefGoogle Scholar
Miyashiro, (A.), 1956. Amer. Min., 41, 104.Google Scholar
Olsen, (E.) and Bunch, (T. E.), 1970. Ibid. 55, 875.CrossRefGoogle Scholar
Schreyer, (W.) and Schairer, (J. F.), 1962. Ibid. 47, 90.Google Scholar
Schreyer, (W.) and Seifert, (F.), 1967. Contr. Min. Petr., 14, 343.CrossRefGoogle Scholar
Sweatman, (T. E.) and Long (J. V. P.), 1969. Journ. Petrology, 10, 332.CrossRefGoogle Scholar
Tomkeieff, (S. I.), 1940. Geol. Mag., 77, 54.CrossRefGoogle Scholar
Zeck, (H. P.), 1972. Nature, 238, 47.Google Scholar