Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-11-27T19:34:04.789Z Has data issue: false hasContentIssue false
  • English
  • Français

On the poikilitic nature of Jabal Al Hasawinah eudialyte

Published online by Cambridge University Press:  05 July 2018

Khaled M. Oun
Khaled M. Oun*
Affiliation:
University of Al Fatah, Department of Geology, P.O. Box 13258, Tripoli, Libya
Get access Rights & Permissions [Opens in a new window]

Abstract

Poikilitic eudialyte outcrops in a strongly peralkaline phonolithic cumulo-dome in Jabal Al Hasawinah, Libya. Textural relationships reveal that the eudialyte has formed at a very late stage of the rock petrogenesis. Electron microprobe analyses confirm its volatile (hydrous) nature and low REE content.

Keywords

eudialytephonoliteJabal Al HasawinahLibya
Type
Mineralogy
Information
Mineralogical Magazine , Volume 55 , Issue 381 , December 1991 , pp. 543 - 547
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1991

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

Bordet, P., Freulon, J. M., and Le Franc, J. P.(1955) Phonolite a eudialyte du Jebel Fezzan. Bull. Soc. Franc. Min. Crist., 78, 425–31.Google Scholar
Busrewil, M. T. and Oun, K. M. (in press) Geo-chemistry of the Tertiary alkaline volcanic rocks of Jabal Al Hasawinah, Libya. In Third Symposium on the geology of Libya. Google Scholar
Carr, G. R., Phillips, E. R., and Williams, P. R. (1976) An occurrence of eudialyte and manganoan pectolite in a phonolite dyke from south-eastern Queensland. Mineral. Mag., 40, 853–6.CrossRefGoogle Scholar
Dawson, J. B. and Frisch, T. (1971) Eucolite from Oldoinyo Lengal, Tanzania, Lithos, 4, 297–303.CrossRefGoogle Scholar
Deer, W. A., Howie, R. A. and Zussman, J. (1986) Rock-forming minerals, IB. Disilicates and ring Silicates (2nd ed.). Longman, London, 348-63.Google Scholar
Fryer, B. J. and Edgar, A. D. (1977) Significance of rare earth distribution in coexisting minerals of peralka-line undersaturated rocks. Contrib. Mineral. Petrol., 61, 35–8.CrossRefGoogle Scholar
Harris, C., Cressey, G., Bell, J. D., Atkins, F. B., and Beswetherick, S. (1982) An occurrence of rare-earth-rich eudialyte from Ascension Island, South Atlantic. Mineral. Mag., 46, 421–5.CrossRefGoogle Scholar
Jurak, L. L. (1978a) Geological map of Libya 1:250,000 sheet Jabal Al Hasawanh NH 33-14, Explanatory booklet. Industrial Research Centre, Tripoli, Libya. 85 pp.Google Scholar
Jurak, L. L. (1978b) Geological map of Libya 1:250,000 sheet Jabal Al Hasawanh NH 33-14, General report. Industrial Research Centre, Tripoli, Libya. 159 pp.Google Scholar
Potts, P. J., Webb, P. C., and Watson, J. S. (1984) Energy-dispersive X-ray analysis of silicate rocks for major and trace elements. X-ray Spectrometry, 13, 2–15.CrossRefGoogle Scholar
Sweatman, T. R. and Long, J. V. P. (1969) Quantitative electron-probe analysis of rock-forming minerals. Petrol, 10, 332–79.CrossRefGoogle Scholar