Aeris Resources Ltd (ASX:AIS, OTC:ARSRF) has more than quadrupled Ore Reserves at its Tritton Operations in central New South Wales, strengthening the foundation for a long-life, multi-mine copper hub centred on the project’s existing processing infrastructure.
Tritton’s Ore Reserve now stands at 10 million tonnes grading 1.7% copper, 0.38 g/t gold and 10 g/t silver, containing around 180,000 tonnes of copper, 130,000 ounces of gold and 3.2 million ounces of silver.
This compares with just 37,000 tonnes of contained copper in the previous reserve estimate and represents more than five years of mill feed at the operation’s current processing capacity.
Mineral Resources have also increased by 70% to 33 million tonnes at 1.7% copper, 0.32 g/t gold and 9 g/t silver, containing approximately 540,000 tonnes of copper.
Constellation and Mallee Bull drive reserve growth
Maiden underground Ore Reserves led the reserve expansion at the Constellation and Mallee Bull deposits.
Constellation contributed 3.8 million tonnes containing about 62,000 tonnes of copper, complementing its existing open-pit reserve and supporting the potential for a longer-life mining operation.
Mallee Bull added a maiden reserve of 2.7 million tonnes at 2.4% copper, containing around 66,000 tonnes of copper. The deposit was added to Aeris’ portfolio through the acquisition of Peel Mining Ltd (ASX:PEX), alongside the Wirlong deposit.
Together, Mallee Bull and Wirlong contributed about 200,000 tonnes of contained copper to Tritton’s Mineral Resource inventory, including roughly 160,000 tonnes classified in the higher-confidence indicated category.
Aeris executive chair André Labuschagne said the enlarged inventory had established “a strong foundation for a long-life, multi-mine copper operation” centred on the Tritton processing plant.
Exploration delivers organic growth
Aeris also recorded material resource growth at Avoca Tank and Budgerygar after tripling underground diamond drilling during FY26.
The Avoca Tank Mineral Resource increased by 180% as drilling extended high-grade mineralisation at depth and along strike.
Budgerygar’s Ore Reserve increased by 317% after mining depletion compared with December 2024, reflecting successful resource conversion drilling and mine planning.
Nine of Tritton’s 10 known deposits remain open down-dip, supporting further exploration potential. Aeris plans around 85,000 metres of underground drilling across the operation during FY27.
Updated mine plan ahead
The revised Mineral Resources and Ore Reserves will feed into an updated life-of-mine plan and production target for Tritton, expected in the first half of FY27.
At Mallee Bull, Aeris will continue optimising the mine plan and production schedule while advancing feasibility studies, ore transport assessments, permitting work and planning for an exploration decline.
Further drilling at Constellation will target conversion of inferred resources, while metallurgical test work will examine opportunities to improve oxide recoveries and potentially bring production forward.
About Aeris Resources
Aeris Resources is an Australian mid-tier copper and gold producer operating the Tritton Copper Operations in New South Wales and the Cracow Gold Operations in Queensland.
The company also holds a pipeline of development and exploration assets and is pursuing a hub-and-spoke strategy at Tritton, using established processing infrastructure to support multiple surrounding ore sources.