Great Southern Mining has reported high-grade gold results from maiden reverse circulation drilling at the Amy Clarke prospect, part of its Duketon gold project near Laverton in Western Australia.
The 18-hole, 2,248-metre programme tested zones identified by earlier aircore drilling along a 4.7-kilometre mineralised corridor. The company said the results had extended mineralisation down-dip by up to 50 metres and confirmed higher-grade areas both along strike and at depth.
The strongest intercept was five metres at 6.71 grams of gold per tonne from 51 metres, including three metres at 10.4 grams per tonne. Another hole returned 11 metres at 1.86 grams per tonne from 45 metres, including a two-metre section grading 8.92 grams per tonne.
A further hole encountered several mineralised zones, with the best interval recording eight metres at 1.44 grams per tonne from 67 metres, including two metres at 4.7 grams per tonne. Other results included five metres at 1.81 grams per tonne from 61 metres and two metres at 1.41 grams per tonne from only seven metres.
The reported intersections are downhole lengths, and their true widths have not yet been established. Drilling was relatively shallow, averaging less than 100 metres below the surface, with gold observed in the weathered zone and continuing into fresh rock.
Great Southern said the mineralisation was associated with quartz veining and disseminated or coarse pyrite within a high-strain structural corridor. The structures are currently interpreted as steeply dipping towards the east and are generally close to contacts between different rock types.
Managing director Matthew Keane said Amy Clarke was an emerging discovery with “immense upside”, adding that gold began at surface and continued to the limit of the drilling in fresh rock.
He said the company’s 2026 reverse circulation campaign had produced strong results at three targets: Amy Clarke, the Golden Boulder discovery and Mon Ami.
Follow-up drilling planned at Amy Clarke
Detailed geological and structural mapping is now under way, alongside multi-element geochemical analysis of selected intervals. The work is intended to improve the understanding of the mineralisation and identify the highest-grade zones.
Great Southern is preparing a further drilling phase, expected to include more reverse circulation work and potentially diamond drilling. Initial follow-up holes are likely to target open lodes in the northern part of Amy Clarke and the central section of the 4.7-kilometre trend.
The system remains open to the south, where little drilling has been completed beyond the company’s southernmost holes. A substantial section of prospective ground therefore remains untested.
Amy Clarke is about 12 kilometres from Regis Resources’ Garden Well processing facility and roughly 3 kilometres south of the Erlistoun open pit mine. Erlistoun contains a 320,000-ounce resource grading 1.9 grams of gold per tonne, while the Garden Well facility has capacity to process five million tonnes a year.
The latest findings add to Great Southern’s activity across the Duketon project, where its nearby Golden Boulder discovery has mineralisation extending along 3.5 kilometres of strike. The company is awaiting assays from a further 6,000 metres of drilling at the southern end of Golden Boulder and along the Golden Boulder East trend.
