Alto Metals (ASX: AME) has intersected multiple broad, shallow zones of gold mineralisation from step‐out RC drilling at the Indomitable prospect within its Sandstone Gold Project in Western Australia.
The company reports that results from the 22-hole program have extended gold mineralisation outside of the current 74,000oz @ 1.5g/t resource, with key hits including:
- Hole SRC 574:
- 21m @ 2.0 g/t Au from 46m; including
- 1m @ 14.9 g/t Au from 61m
- 1m @ 6.3 g/t Au from 66m,
- 11m @ 2.5 g/t Au from 92m; including
- 2m @ 7.0 g/t Au from 93m
- 21m @ 2.0 g/t Au from 46m; including
- Hole SRC 571:
- 15m @ 2.2 g/t Au from 44m; including
- 2m @ 13.2 g/t Au from 45m;
- 25m @ 1.2 g/t Au from 65m; including
- 1m @ 11.5 g/t Au from 71m
- 15m @ 2.2 g/t Au from 44m; including
- Hole SRC 557:
- 16m @ 1.1 g/t Au from 76m; including
- 2m @ 5.3 g/t Au from 83m
- 16m @ 1.1 g/t Au from 76m; including
- Hole SRC 566:
- 21m @ 1.1 g/t Au from 136m; including
- 6m @ 1.8 g/t Au from 136m
- 11m @ 1.0 g/t Au from 146m
- 21m @ 1.1 g/t Au from 136m; including
- Hole SRC564:
- 24m @ 0.7 g/t Au from 82m; including
- 4m @ 2.2 g/t Au from 95m,
- 29m @ 1.0 g/t Au from 113m;
- 15m @ 0.6 g/t Au from 154m
- 24m @ 0.7 g/t Au from 82m; including
The drilling also encountered a number of wide zones of lower grade ‘halo’ mineralisation along strike of the main structural trend, including 21m @ 0.8g/t Au from 125m in hole SRC561.
Speaking on the results, Alto Metals Managing Director Matthew Bowles said: “At Indomitable we have now defined mineralisation over a strike length of 500m, with numerous broad intersections of strong gold mineralisation, encountered from shallow depths, which remain open at depth and along strike.
“we have now defined mineralisation over a strike length of 500m, with numerous broad intersections of strong gold mineralisation, encountered from shallow depths”
Such an unusually deep weathering profile suggests the mineralisation structures at the Indomitable deposit are long‐lived and extensive, which is encouraging as it indicates the potential for a much larger system.
RC drilling is planned to commence in the next few weeks, we are looking forward to the results of the IP and gravity surveys and our mineral resource update remains on track for this quarter. Our systematic approach to exploration is continuing to deliver and we are excited about what the year ahead can deliver for Alto shareholders.”
The program, which totalled 3,074m across 22 holes, was tasked with testing strike extensions of the ‘high‐grade’ plunging shoot at the prospect. 21 of these holes encountered mineralisation 15m from surface to up to 154m below surface, indicating the potential for a ‘much larger’ mineralised system.

The company reports that it will recommence a further ~10,000m of RC drilling in the coming weeks, targeting depth and strike extensions of known mineralisation along the contact at the Lords granodiorite and Juno Lode.
In addition, resource-growth and extensional RC drilling are also planned for Vanguard, Indomitable, and a number of regional prospects within the Alpha Domain and the broader Sandstone Gold Project area.
Images: Alto Metals Limited


