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Rosebery Mine, Rosebery, Rosebery district, Tasmania, Australia

Alstonite
Rosebery Mine, Rosebery, Rosebery district, Tasmania, Australia

Photo: crocoite.com

Latitude: 41°46'59"S
Longitude: 145°31'0"E

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A Zn-Pb-Cu-Ag-Au VMS-type deposit on the slopes of Mt Black in western Tasmania. The deposit was discovered in 1893 but not worked on a large scale until 1936 due to the very fine grain size of the intimately combined sulphides. The underground mine is still in operation today ('MMG Rosebery Mine'), with an expected mine life of >2020. It has previously been operated by several other companies, initially EZ (Electrolytic Zinc), later Pasminco, Oz Minerals and Zinifex, recently taken over by MMG.
The ore is a volcanic-related (Mt. Read volcanics), sediment-hosted, pyrite-rich massive sulphide, with numerous discrete orebodies, but no gossans. There has been some overprinting by Devonian mineralisation, related to an underlying granite intrusion.
Mineralogically, it is best known for its vein minerals, mostly barite and other barium minerals, plus rhodochrosite and boulangerite.

Mineral List

47 entries listed. 44 valid minerals.

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References

- Large, RR and Allen, RL and Blake, MD and Herrmann, W (2001): Hydrothermal Alteration and Volatile Element Halos for the Rosebery K Lens Volcanic-Hosted Massive Sulfide Deposit, Western Tasmania. Economic Geology, 96, 1055-1072.

- Bottrill, R. S. & Baker, W. E. (2008): A Catalogue of the Minerals of Tasmania. Geological Survey Bulletin 73, Mineral Resources Tasmania

- www.zinifex.com

Khin Zaw, 1992. The effect of Devonian metamorphism and metasomatism on the Cambrian VMS deposits in the Rosebery - Hercules district, W. Tasmania. PhD Thesis [unpub.], Univ. Tasm.

Khin Zaw, R.R. Large and D.L. Huston, 1997. Petrological and geochemical significance of a Devonian replacement zone in the Cambrian Rosebery massive sulfide deposit, western Tasmania. Canad. Mineral. 35, p. 1325-1349

Huston, D. L. and R. R. Large, 1988. Distribution, mineralogy and geochemistry of gold and silver in the north end orebody, Rosebery, Tasmania. Economic Geology 83: 1181-1192.

Lees, T.C., Khin Zaw, Large, R.R. and Huston, D.L., 1990: Rosebery and Hercules copper-lead-zinc deposits. In: Geology of the mineral deposits of Australia and Papua New Guinea. Australasian Institute of Mining and Metallurgy, Melbourne. 1241-1247.

Berry, M.V., Edwards, P.W., Georgi, H.T., Graves. C.C., Carnie, C.W.A., Fare, R.J., Hale, C.T., Helm, S.W., Hobby, D.J. and Willis, R.D., 1998: Rosebery lead-zinc-gold-silver-copper deposit. In: Berkman, D.A., and Mackenzie, D.H., (eds.): Geology of Australian and Papua New Guinean Mineral Deposits. Monograph 22. Australasian Institute of Mining and Metallurgy, Melbourne. 481-486.

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Copyright © Jolyon Ralph and Ida Chau 1993-2013. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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