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 ('Zinifex Rosery Mine'), with an expected mine life of >2020.
The ore is a volcanic-related (Mt. Read volcanics), sediment-hosted, pyrite-rich massive sulphide, with numerous discrete orebodies, but no gossans.
Ref.:
- www.zinifex.com