17 August 2026 | Rasp Mine, Broken Hill, New South Wales
Broken Hill Mines has confirmed a substantial new zone of high-grade silver-lead-zinc mineralisation at the Centenary deposit, about 250 metres from the existing Rasp Mine workings in Broken Hill.
The latest drilling connects the northern and southern portions of Centenary across an interpreted strike length of about 1,600 metres. The company said parts of the newly defined mineralisation sit outside the existing Mineral Resource estimate, strengthening the case for further drilling and an updated resource later this year.
High-grade results
- 17.8m at 10.1% zinc equivalent, or 280g/t silver equivalent, from 420m, including 5.4m at 19.5% zinc equivalent, or 540g/t silver equivalent, from 432.4m
- 14.1m at 9.4% zinc equivalent, or 261g/t silver equivalent, from 394.8m
- 11.1m at 9.0% zinc equivalent, or 248g/t silver equivalent, from 420m
The strongest included interval contained 173g/t silver, 7.9% lead, 6.5% zinc and 0.3% copper. Broken Hill Mines also referred to an earlier reported intersection of 25.8m at 11.7% zinc equivalent, or 323g/t silver equivalent.
A more recent hole intersected a visually mineralised zone up to 35 metres wide. Assays for that hole are pending, so no grade should be inferred from the visual observation.
Why it matters
Centenary has a historic Inferred Mineral Resource of 4.8 million tonnes at 9.2% zinc equivalent, or 255g/t silver equivalent. The latest drilling improves continuity between previously separated areas and may add higher-grade material close to established underground access and processing infrastructure.
Rasp is an operating mine with a 750,000-tonne-a-year concentrator and a residential workforce of about 118 employees and contractors. Broken Hill Mines said Centenary could provide high-grade feed for the existing operation and may support a medium-term plant expansion, subject to further drilling, resource work and development studies.
Next steps
The company plans additional drilling to define an exploration target and support a Mineral Resource update targeted for the fourth quarter of 2026. The pending assay results and the scale of further continuity will be important inputs to any mine-planning or processing decision.
The discovery is likely to sustain demand for underground drilling, geology, resource modelling and technical studies as the company assesses how Centenary could be incorporated into the Rasp operating plan.
Source: Broken Hill Mines Limited, “Confirmation of Major New Discovery at Centenary: Thick, High Grade Intercepts Expand Resource Zone”, 17 August 2026.