The world-class Hellyer zinc-lead-silver-gold-copper deposit of western Tasmania (see map) is a well preserved example of a volcanic-hosted massive sulphide. The deposit is hosted by intermediate-basic lavas and volcaniclastics of the Que-Hellyer Volcanics, the uppermost volcanic unit of the Cambrian Mt.Read Volcanics. The complete deposit, including the footwall alteration stringer zone, is preserved. The complex morphology of the massive sulphide is due to the combination of primary depositional irregularities, ductile Devonian folding and brittle Mesozoic faulting (see cross-section looking north through the centre of the deposit, grid squares are 50m). Discovered in mid-1983 by drilling coincident geophysical and geological anomalies, the 16 million tonne deposit (averaging 14%Zn, 7%Pb, 170g/t Ag, 2.5g/t Au and 0.4%Cu) was developed as a medium-sized underground mine 1986-1989 and was in full production until mid-2000. The mine closed when all reserves were recovered.
Welcome to our extensive microtexture gallery.
Use the drop down menu to see the Hellyer minerals currently available.
Reference: McArthur, G.J. (1996) Textural Evolution of the Hellyer Massive Sulphide Deposit, unpublished PhD thesis,
Univ.of Tas., 3 vols.
resolution images are available by contacting MODA firstname.lastname@example.org
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