Hostname: page-component-cd9895bd7-gxg78 Total loading time: 0 Render date: 2024-12-19T02:52:17.107Z Has data issue: false hasContentIssue false
  • English
  • Français

Rare-earth minerals yttrian zirconolite and allanite-(Ce)* and associated minerals from Koberg mine, Bergslagen, Sweden

Published online by Cambridge University Press:  05 July 2018

M. A. Zakrzewski ,
W. J. Lustenhouwer ,
H. J. Nugteren  and
C. T. Williams
M. A. Zakrzewski
Affiliation:
Institute of Earth Sciences, Free University, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
W. J. Lustenhouwer
Affiliation:
Institute of Earth Sciences, Free University, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
H. J. Nugteren
Affiliation:
Institute of Earth Sciences, Free University, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
C. T. Williams
Affiliation:
Department of Mineralogy, The Natural History Museum, Cromwell Road, London SW7 5BD, U.K.
Get access Rights & Permissions [Opens in a new window]

Abstract

A study of mine dump material from Koberg, Bergslagen, Sweden has revealed a varied mineral assemblage, including Zr-, REE-, Th- and U-bearing minerals associated with the sulphide ore deposit. Detailed descriptions and microprobe analyses are presented of the rare earth minerals yttrian zirconolite and allanite-(Ce), and the zirconium oxide baddeleyite. Yttrian zirconolite is patchily zoned in the actinide elements Th and U, and the low analytical totals suggest the presence of several weight per cent of H2O. The implications of these features with respect to synthetic zirconolite in SYNROC and to radioactive waste management are briefly discussed. Chemical zoning of individual REE in yttrian zirconolite is described and the REE distribution compared with those of zirconolites from other localities. Allanite-(Ce) is generally unzoned, but contains REE-rich rims which are considered to be sub-micron intergrowths of allanite plus a bastnäisite-type mineral phase. The MgO content of allanite-(Ce) is unusually high and appears to be a characteristic feature of allanite from other cerium and mineral occurrences of Central Sweden. The rare earth minerals at Koberg are interpretated as having been formed as a result of localized remobilization of elements including Ti and Zr with H2O- and CO2-rich fluids.

Keywords

zirconoliteallanite-(Ce)dissakisite-(Ce)baddeleyiteKoberg mineBergslagenSwedenrare earth mineralszincian spineltitanian clinohumitemetacarbonatesskarn
Type
Research Article
Information
Mineralogical Magazine , Volume 56 , Issue 382 , March 1992 , pp. 27 - 35
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2014

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.)

Footnotes

*

Similar to new mineral dissakisite-(Ce); See Addendum, p. 35.

References

Baker, J. H., Hellingwerf, R. H., and Oen, I. S. (1988) Geol. Mijnb., 67, 121–38.Google Scholar
Bayliss, P., Mazzi, F., Munno, R., and White, T. J. (1989) Mineral. Mag., 53, 565-9.CrossRefGoogle Scholar
Borodin, L. S., Bykova, A. B., Kapitonova, T. A., and Pyatenko, Yu. A. (1960) Dokl. Acad. Sci. USSR, Earth Sci. Sect., 134, 1022–4.Google Scholar
Deer, W. A., Howie, R. A., and Zussmam, J. (1986) Rock-forming Minerals, 2nd ed., Vol. IB, 151-79. Longman Scientific & Technical.Google Scholar
Fowler, M. B. and Williams, C. T. (1986) Mineral. Mag., 50, 326–8.CrossRefGoogle Scholar
Frondel, J. W. (1975) Lunar Mineralogy, 323. New York, Wiley Interscience.Google Scholar
Gavelin, S. (1989) Geol. FOren. Stockh. Förh. 111, 213–27.CrossRefGoogle Scholar
Geijer, P. (1927) Sver. Geol. Unders., Ser. C, no. 343.Google Scholar
Geijer, P. (1961). Arkiv. Mineral. Geol., 3, 99–105.Google Scholar
Gieré, R. (1986) Contrib. Mineral. Petrol., 93, 459–70.CrossRefGoogle Scholar
Gieré, R. (1990). Terra Nova, 2, 60-7.CrossRefGoogle Scholar
Gieré, R. and Williams, C. T. (1991) Gac-MAC-SEG 16, Abstracts, May 1991, A44.Google Scholar
Igelström, L. J. (1871) Mineralogisk Vägvisare i Werm-land. Filipstad.Google Scholar
Platt, R. G., Wall, F., Williams, C. T., and Woolley, A. R. (1987) Mineral. Mag., 51, 253–63.CrossRefGoogle Scholar
Purtscheller, F. and Tessardi, R. (1985) Ibid., 49. 523-9.Google Scholar
Ringwood, A. E. (1985) Ibid., 49, 159-76.Google Scholar
Rickard, D. T. (1988) Geol. Mijub., 67, 13–55.Google Scholar
Tegengren, F. R. (1924) Sveriges ädlare maimer och bergwerk. Sver, Geol, Unders., Ser. Ca, 17.Google Scholar
Williams, C. T. and Gieré, R. (1988) Schweiz. Mineral. Petr. Mitt., 68, 133–40.Google Scholar

An addendum has been issued for this article:

Addendum