Australia's zinc mine supply landscape is undergoing a significant structural shift, as the closure of mature operations intersects with the ramp-up of newly commissioned projects, with direct implications for China's concentrate imports and spot treatment charges (TCs). According to a comprehensive analysis published by Shanghai Metals Market (SMM) on July 31, 2026, the country's supply base is moving away from dependence on a small number of large, established mines toward a more complex mix of assets at different stages of their lifecycle. The defining event of 2026 has been the closure of Glencore's Lady Loretta mine in Queensland, which reached the end of its mine life in late 2025.
SMM data show that Glencore's Australian zinc operations produced 218 kt of zinc in concentrate in H1 2026, down 54 kt year on year, with approximately 51 kt of that reduction directly attributable to Lady Loretta's exit. Separately, zinc concentrate production across Australia fell 20% year on year in H1 2026, with SMM noting that most of the decline was driven by this single mine closure rather than by simultaneous cutbacks at other core operations. Dugald River, operated by MMG, remains one of the most resilient assets in the country.
The mine produced 87.2 kt of zinc in concentrate in H1 2026 and delivered a record annual result of 183.5 kt in 2025, representing a 12% increase year on year. MMG's Rosebery mine produced approximately 48.6 kt in 2025. Sibanye-Stillwater's Century tailings reprocessing operation contributed approximately 101 kt of payable zinc in concentrate in 2025, though the project is approaching a mine-life milestone around 2027 as its tailings resource nears depletion.
South32's Cannington produced approximately 44.5 kt of payable zinc in FY2025, with guidance of approximately 40 kt for FY2026 and 43 kt for FY2027, pointing to a stable but lower production profile amid more complex underground mining conditions. Offsetting these pressures are several newly commissioned or restarted projects. Federation continues to ramp up, Woodlawn has returned to stable production, and Endeavor's restart is adding incremental supply.
At Golden Grove, operated by 29Metals, the Gossan Valley mining front is expected to deliver first ore in H2 2026. SMM characterises Australia's medium-term outlook not as a one-way contraction, but as a handover period in which retiring mines progressively cede ground to new sources of output. The wet season in northern Australia compounds the supply picture through its impact on logistics rather than mine capacity itself.
The 2025-2026 northern wet season was the seventh-wettest on record, with average rainfall of approximately 684 mm, some 44% above the long-term average, accompanied by eleven tropical cyclones in the surrounding region. Key transport infrastructure, including the rail link from Mount Isa to the Port of Townsville, the Bing Bong loading facility serving McArthur River and the slurry pipeline connecting Century to the Port of Karumba, is vulnerable to flooding and cyclone disruption. SMM notes that in Q1 2026, Dugald River produced 41.1 kt of zinc concentrate despite flooding and rail disruptions, but logistics constraints caused concentrate sales to fall short of production, leaving inventory temporarily stockpiled at the mine.
Once rail and port operations resume, accumulated material tends to be shipped in concentrated waves, causing China's monthly import data to spike, a pattern that SMM cautions should not be misread as a lasting production recovery. China's imports of zinc concentrate from Australia are described by SMM as highly seasonal and sensitive to shipment scheduling. Monthly fluctuations can reflect not only mine output changes but also rail disruptions, delayed port loading, ocean transit times, customs-clearance timing and shifts in smelter procurement strategies.
The analytical firm advises that cumulative import data over extended periods provides a more reliable signal than individual monthly readings. For treatment charges, SMM explains that TCs reflect the balance between concentrate supply and smelter processing demand at any given time. When Australian shipments are delayed and arrivals in China decline while domestic smelter demand remains strong, competition for spot concentrate can intensify and push spot TCs lower.
If delayed cargoes subsequently arrive in a concentrated wave or alternative supply becomes available, the pressure may dissipate relatively quickly. In parallel with the Australian developments, SMM highlights that Kipushi, located in the Democratic Republic of the Congo and operated by Ivanhoe Mines, produced 70.2 kt of contained zinc in concentrate in Q2 2026, marking a seventh consecutive quarter-on-quarter increase. On the other side of the global balance, SMM identifies several headwinds beyond Lady Loretta's closure.
Antamina in Peru has shifted to a copper-rich, zinc-poor ore sequence, reducing its zinc concentrate output. Kazzinc in Kazakhstan is facing feedstock-blending constraints. Century's approaching tailings depletion around 2027 represents another confirmed future loss.
SMM concludes that whether pressure on TCs proves temporary or structural depends on whether annual net mine-supply additions globally are sufficient to offset cumulative losses, and on the trajectory of smelter operating rates in China and overseas. All data cited in this article are sourced from SMM's analysis published on July 31, 2026, based on publicly available information, market communication and SMM's internal database models.
Source: news.metal.com