Great Southern extends Mon Ami gold mineralisation with 16m intercept

17 August 2026 | Mon Ami Gold Project, Laverton, Western Australia

Great Southern Mining has reported a 16-metre gold intersection from reverse-circulation drilling at its Mon Ami project, 12 kilometres south of Laverton in Western Australia.

The result came from the first six holes of a 16-hole, 3,089-metre program. The standout hole intersected 16m at 3.37g/t gold from 178m, including 4m at 8.54g/t and 2m at 6.86g/t. A separate interval in the same hole returned 4m at 1.45g/t from 202m.

Mineralisation extended

• 6m at 1.83g/t gold, including 1m at 7.28g/t
• 19m at 1.12g/t gold, including 1m at 4.0g/t and 1m at 5.0g/t

Great Southern said the first batch of results extended known mineralisation by up to 70 metres down dip and 55 metres down plunge. The drilling was designed to test extensions around the existing resource and improve the company’s understanding of higher-grade shoots.

Mon Ami has a JORC Mineral Resource of 1.56 million tonnes at 1.11g/t gold for 55,500 ounces. The deposit is on a granted mining lease and is within about 50 kilometres trucking distance of several processing plants, including the Granny Smith facility around 12 kilometres to the west.

Why it matters

The intercept provides evidence that the mineralised system continues beyond parts of the current drilling envelope. Further continuity could support an updated resource and improve the technical basis for development studies.

Great Southern said a number of studies and approvals are already complete and a haulage-route licence has been secured. These factors may shorten the path to evaluating a development option, but the project remains subject to additional drilling, resource work, commercial assessment and any remaining approvals.

Next steps

Assays from ten holes at the Blanc Platt target are pending and were expected within one to two weeks of the announcement. Results are also pending from the Golden Boulder program, while drilling and exploration are continuing at Amy Clarke and Mt Dillon.

For Mon Ami, the immediate focus is on integrating the remaining results, assessing the scale of the down-plunge extension and determining whether an updated resource or additional drilling is warranted.

Source: Great Southern Mining Limited, “Significant 16m at 3.37 g/t gold intercepted at Mon Ami”, 17 August 2026.