Peak

Peak is located in the northern Cobar Basin, south of Cobar in central-west NSW.

It comprises two separate underground mines – Peak South and New Cobar – and a base metals and gold processing plant. The plant is supplied with lead-zinc-gold and copper-gold ores from several active underground mining areas that use open stope mining with backfill. Thickened tailings are pumped for deposition to an engineered tailings storage facility.

The processing facility enables the treatment of different ore types to produce separate copper, lead and zinc concentrates. Ore is processed in campaigns based on the nature of the mineralisation mined.

Our Peak Operation delivered consistent performance in FY25, with strong mine development progress and steady production aligned with mine plans across Peak South and New Cobar. Ore mined totalled 545kt. A dedicated focus on lifting development rates saw a record monthly development advance achieved in June 2025.

Processing performance was strong with 631kt of ore processed and excellent metallurgical results achieved, particularly in lead and zinc recoveries. Zinc and lead grades increased with a higher proportion of ore from Federation, while copper grades from New Cobar improved despite declining volumes. Federation ore also supported processing throughput from Q2 FY25.

In FY26, our Peak Operation is well-positioned for growth. Efficiency projects targeting ongoing delivery of 1,000 development metres per quarter and further ore integration from Federation are key dynamics expected to drive performance.

Regulatory compliance reporting

Follow this link to view Peak’s compliance regulatory reporting.

Production performance

METALUNITFY25 PRODUCTIONFY24 PRODUCTION
GOLDoz41,91229,764
SILVERoz245,674316,020
COPPERt2,6982,159
LEAD t15,74718,671
ZINCt16,80816,847

Site Operations

Peak snapshot

100% Aurelia Metals Limited.

Polymetallic underground mine and processing facility.

Cobar, Central West NSW.

800ktpa.

Mineral Resource and Ore Reserve

Mining

  • South Mine access via shaft access and a boxcut and decline from surface.
  • North Mine access via the New Cobar open pit and decline.
  • Ore sourced from multiple deposits including Chronos, Perseverance Deeps, S400 and Kairos at the South Mine and Jubilee at the North Mine.
  • Open stoping with a combination of loose rock fill and cemented rock fill.
  • 60-70 stopes extracted per year.
  • Core underground mining activities performed by Aurelia with support from specialist contractors.
  • Underground ore crushing and shaft hoisting at South Mine, with ore trucked from up to 1.6km deep to crushing station at 630m depth.

Processing

  • Primary crusher (underground), SAG mill, ball mill, gravity gold and intensive leach, base metals flotation and gold CIL circuits plus three concentrate filtration facilities.
  • Campaign treatment of gold-copper and gold-lead-zinc ores.
  • Significant upgrade completed in February 2020 to allow recovery of separate lead and zinc concentrates by flotation.
  • Grid connections for power and water supply.
  • Products: gold and silver doré, copper concentrate, lead concentrate and zinc concentrate.

Maintenance

  • Progressive structural steel replacement program.
  • Shaft and winder asset improvement projects.
  • Strategic asset management plan implementation to underpin asset reliability improvements.
  • Most fixed and mobile plant maintenance performed by Aurelia with support from specialists in Cobar and regional centres.

Sales and logistics

  • Doré transported and sold to domestic refineries.
  • Concentrates transported 95km by truck to Hermidale rail transfer facility for export through Port Botany (Sydney) and Port of Newcastle.
  • Concentrates are marketed to international traders.