Mount Isa (zinc): a zinc operation in Australia

Mount Isa (zinc) is a mine producing zinc in Australia, operated by Glencore. The sources report 288.2 kt of zinc in concentrates for CY2025; the basis is 100% (Glencore reports controlled industrial assets on a 100% basis). In zinc content, whole-operation output for CY2025 is 288,200 tonnes: about 2.2% of world zinc output in 2025 and about 26% 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?

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?

Between CY2024 and CY2025 the reported figure fell by 0.2%, in the same unit and on the same basis.

How the zinc-content figure is worked out. Glencore prints 288.2 kt of zinc in concentrates for Mount Isa in 2025. Glencore reports controlled industrial assets on a 100% basis and owns 100% of Mount Isa Mines Limited, so the figure covers the whole operation. 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 29 January 2026.

• The report's narrative for Australia says the Lady Loretta mine contributed approximately 110,000 tonnes of zinc in 2025 and reached end of life in December 2025 (PDF p.6). The report does not split this between the Mount Isa and McArthur River rows.
• The Australia total in the report is 562.8 kt of zinc in concentrates, the sum of the Mount Isa row (288.2 kt) and the McArthur River row (274.6 kt).

How does it compare?

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

Sources

• Glencore plc: 2025 Annual Report (annual report, CY2025). Opened 4 November 2026; used: PDF pp.93, 230 (Note 35), 247.
• Glencore plc: Full Year 2025 Production Report (Baar, 29 January 2026) (company production report, CY2025 and CY2024). Opened 4 November 2026; used: PDF pp.4, 5, 6, 11.
• 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.
• Made with AI assistance, checked against sources. The facts were gathered from the documents above by AI-assisted research and re-checked against those documents by a second, independent pass; the page text is generated from the data. No professional review took place. How the site is made. To report an error, contact us; fixes are logged on the corrections page.