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Some aspects of the silver mineralization in the Hällefors region (Bergslagen, Sweden)

Published online by Cambridge University Press:  05 July 2018

A. W. Jasinski
A. W. Jasinski*
Affiliation:
Institute of Earth Sciences, Free University, De Boelelaan 1085, 1007 MC Amsterdam, The Netherlands
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Abstract

Sulphide and sulphosalt mineralization in the Hällefors silver mining district occurs as stratabound bodies in skarn-like black carbonates and other carbonates in the eastern part of the district, and as epigenetic, tectonically controlled vein mineralization in tuffaceous metavolcanics and, to a lesser extent in slates, in the western part.

Previous work has suggested that the Ag-bearing Hällefors deposits were formed by the action of metamorphic solutions on sediments of volcano-sedimentary origin. At the stages of sulphosalt and sulphide formation, temperature and pressure conditions were probably in the ranges 500–440 K and 4.5–3.5 kbar. Examination of a log aS2-1/T diagram and of Ag-Sb phase relations combined with study of the ores suggest the paragenesis of the Ag-bearing minerals is as follows: allargentum and dyscrasite as exsolution bodies in silver bearing galena; Ag-containing tetrahedrite → freibergite → miargyrite → pyrargyrite → stephanite (from hydrothermal solutions).

Type
Research Article
Information
Mineralogical Magazine , Volume 47 , Issue 345 , December 1983 , pp. 507 - 514
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1983

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References

Amcoff, O. (1976) Neues Jahrb. Mineral. Mh. 247–61.Google Scholar
Craig, J. R., and Barton, P. B. (1973) Econ. Geol. 68, 493–506.CrossRefGoogle Scholar
Craig, J. R., and Lees, W. R. (1972) Ibid. 67, 373–7.Google Scholar
Hall, W. E., and Czamanske, G. K. (1972) Econ. Geol. 67, 350–61.CrossRefGoogle Scholar
Hoda, S. N., and Chang, L. L. Y. (1975) Am. Mineral. 60, 621–33.Google Scholar
Jasinski, A. W. (in prep.) Selected problems of the copper mineralization in the Hallefors region (Bergslagen, Sweden). Kostov, I., and Minceva-Stefanova, J. (1981) Sulphide minerals: crystal chemistry, paragenesis and systematics. Sofia, 212 pp.Google Scholar
Moorman, A. C. Andriessen, P. A. M., Boelrijk, N. A. I. M., Hebeda, E. H., Oen, I. S., Priem, H. N. A., Verdurmen, E. A. T., Verschure, R. H., and Wiklander, U. (1982) Geol. For. Fork (in press).Google Scholar
Nugteren, H. W. (1978) The silver mines of Hallefors, Central Sweden. M.Sc. thesis, Free University of Amsterdam.Google Scholar
Nugteren, H. W. and Zakrzewski, M. A. (in prep.) The origin and mineralogy of distal volcanosedimentary deposit of Hallefors mine, Bergslagen, Central Sweden.Google Scholar
Oen, I. S., Helmers, H., Verschure, R. H., and Wiklander, U. (1982) Geol. Rund. 71, 182–94.CrossRefGoogle Scholar
Petruk, W., Harris, D. C. Cabri, L. J., and Stewart, J. M. (1971) Can. Mineral. 11, 187–96.Google Scholar
Powell, R. (1978) Equilibrium thermodynamics in petrology, Harper and Row, 284 pp.Google Scholar
Robie, R. A., Hemingway, B. S., and Fisher, J. R. (1978) V.S. Geol. Survey Bull. 1452, 456 pp.Google Scholar
Sundius, N. (1923) Soeriges Geol. Undersokning, ser. C, 312.Google Scholar
Parwel, A., and Rajandi, B. (1966) Ibid. no. 614.Google Scholar
Tegengren, F. (1924) Ibid. ser. Ca, no. 17.Google Scholar
Welin, E., Wiklander, U., and Kahr, A. M. (1980) Geol. For. Fork 102, 269–72.Google Scholar
Zakrzewski, M. A. (1982) Geol. Rund. 71, 195–205.CrossRefGoogle Scholar