Rosebery: a zinc operation in Australia

Rosebery is an underground mine producing zinc in Tasmania's west coast, Australia, operated by MMG. The sources report 48,597 tonnes of zinc in zinc concentrate for CY2025; the basis is whole mine, as reported by MMG. In zinc content, whole-operation output for CY2025 is 48,597 tonnes: about 0.4% of world zinc output in 2025 and about 4.4% of Australia's; it is one of 22 operations on this site whose output can be stated in zinc content.

Who owns and operates it?

Owners of Rosebery
Owner	Interest	As of
MMG (operator) The table groups MMG's Australian operations (Dugald River and Rosebery) under 100% interest assets.	100%	31 December 2025

Interests are as stated in the sources below on the date shown. Ownership changes with deals, so a stake may have changed since the date shown.

How much does it produce?

Reported output of Rosebery
Period	Output	Basis	Where in the source
CY2025	48,597 tonnes of zinc in zinc concentrate Rosebery is described by MMG as an underground polymetallic base metal mining operation; MMG also reports lead, copper, gold and silver.	whole mine, as reported by MMG	PDF p.19, table "Rosebery - Production", row "Zinc in zinc concentrate (tonnes)", column 2025; narrative PDF p.20 · MMG Limited
CY2024	56,313 tonnes of zinc in zinc concentrate	whole mine, as reported by MMG	PDF p.19, same row, column 2024 · MMG Limited

Between CY2024 and CY2025 the reported figure fell by 13.7%, in the same unit and on the same basis.

How the zinc-content figure is worked out. MMG prints 48,597 tonnes of zinc in zinc concentrate produced at Rosebery in 2025. MMG reports the Australian operations under assets in which it holds a 100% interest, so the figure covers the whole mine. World mine production of zinc in 2025 was 13,000,000 tonnes (USGS Mineral Commodity Summaries 2026); Australia produced 1,100,000 tonnes.

Status: operating, as of 31 December 2025.

MMG reports payable zinc in product sold separately (38,722 tonnes in 2025). Only zinc in zinc concentrate is used.

How does it compare?

Other zinc operations on this site: Red Dog, Antamina (zinc), Mount Isa (zinc), McArthur River (zinc), Rampura Agucha, Sindesar Khurd, Zawar mines, Rajpura Dariba, Kayad, Garpenberg, Tara, Neves-Corvo (Somincor). In Australia: Mount Isa (zinc), McArthur River (zinc), Dugald River. See where zinc comes from for the country totals, the country page for Australia, and MMG for its other operations here.

Sources

MMG Limited: 2025 Annual Results announcement (3 March 2026) (stock-exchange filing (HKEX results announcement), CY2025). Opened 4 November 2026; used: PDF pp.1, 9, 18, 19, 20, 52.
U.S. Geological Survey: Mineral Commodity Summaries 2026: Zinc (government statistical summary, 2025 (world and country mine production)). Opened 3 November 2026; used: world and country mine production table.

Method and limits

Reported, not estimated. Output is the figure the operator or owner published, in the unit it used. This site does not estimate output where none is published.
Shares. A share divides output in zinc content by the USGS world or country total for 2025. Where the operator's year is a fiscal year or the unit is a concentrate or a carbonate equivalent, the share is approximate or not given.
Whole operation or owner's share. The basis column says which. A joint venture's output is never counted twice.
Partial list. Only operations with a published figure are listed, so the rank is among those on this site, not among every zinc mine. Shares of a country's output mix periods and bases, so treat them as indicative.
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