Platina Resources Drills 53 Holes to Test If Granite Well East Gold System Is Bigger
Key Takeaways
- Platina has started Phase 4 aircore drilling at Granite Well East, a 53-hole, roughly 3,200m program aimed at testing strike continuity and lateral extent of Phase 3 gold mineralisation.
- Phase 3's best result was 1m @ 7.10g/t Au from 40m in MMKAC0239, with wider zones including 7m @ 0.61g/t Au and 4m @ 1.11g/t Au in MMKAC0240.
- Several Phase 3 intercepts ended at or near bottom of hole, indicating mineralisation remains open at depth beneath the weathered profile.
- The project sits 13km east of Laverton, next to Genesis Minerals' 3.9Moz Laverton Project, but no mineral resource has been stated at Mt McKenna.
- No timeline for Phase 4 results has been disclosed, and outcomes could lead to reverse circulation drilling or induced polarisation surveys.
Phase 4 aircore drilling commences at Granite Well East
Drilling is back underway at a prospect where early results hinted at something bigger. Platina Resources (ASX: PGM) has commenced Phase 4 aircore (AC) drilling at the Mt McKenna Gold Project in Western Australia, its second program at the Granite Well East Prospect.
The program comprises 53 AC holes for approximately 3,200m. It is designed to follow up Phase 3 mineralisation that, according to the company, provided “strong evidence for a potentially much larger gold system.”
For you as an investor, the key question is scale and continuity. Results will help show how far the mineralisation extends, which shapes what the company does next.
Dr Paul Polito, Managing Director and CEO
“This aircore drilling program is designed to test the potential strike continuity and lateral extent of the gold mineralisation identified in Phase 3 and to provide vectors towards higher-grade zones…”
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Phase 3 results driving the follow-up
Standout intercepts
Phase 3 drilling identified multiple mineralised zones at Granite Well East. The intercepts below were reported in the company’s 29 June 2026 release and are not new results.
| Hole | Intercept | Note |
|---|---|---|
| MMKAC0239 | 1m @ 7.10g/t Au from 40m | Ending 1m above bottom of hole (BOH) |
| MMKAC0240 | 4m @ 1.11g/t Au from 12m | Associated with a strong arsenic anomaly |
| MMKAC0240 | 7m @ 0.61g/t Au from 36m, including 2m @ 1.41g/t Au from 40m | Mineralisation continuing to BOH |
| MMKAC0194 | 4m @ 0.93g/t Au from 52m, including 3m @ 1.13g/t Au from 52m | Ending at BOH |
Grams per tonne (g/t) measures gold grade, meaning grams of gold per tonne of rock. The 7.10g/t Au intercept is the highest grade of the group, though it is only 1m wide.
Open at depth
Several Phase 3 intercepts extended to or finished near the bottom of hole. That indicates the mineralisation remains open at depth beneath the weathered profile, meaning it has not yet been traced to its limit.
Why aircore drilling and geology matter
Aircore drilling is a shallow drilling method used to test large areas and point towards targets. It is typically used ahead of follow-up work such as reverse circulation drilling or induced polarisation surveys, both named in the announcement as possible next steps.
The geological setting is what makes the target interesting. The area lies where two major structural corridors are interpreted to intersect, and it spans three broad lithological (rock type) domains: mafic (basalt and gabbro), ultramafic and granitoid.
According to the company, this juxtaposition provides a favourable setting for focusing and trapping gold-bearing fluids. It is also consistent with the geological settings of major gold deposits in the Leonora-Laverton region.
The Granite Well East target sits within an observed mineralised corridor selected using several exploration datasets:
- Geological mapping
- Surface geochemical sampling
- Reinterpretation of historical geophysical data
- A detailed ground gravity survey
The announcement does not state a mineral resource for the project. Treat these results as early-stage exploration data.
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Location and what comes next
The Mt McKenna Project lies 13km east of Laverton. It is adjacent to Genesis Minerals’ (ASX:GMD) 3.9Moz Laverton Project and 20km north-east of Goldfields’ (ASX:GFI) 3.9Moz Granny Smith Gold Mine.
These are neighbouring projects owned by other companies. They give geographic context, not an indication of any resource at Mt McKenna.
Phase 4 results will assist in determining the scale, continuity and significance of mineralisation. They will also guide subsequent exploration, such as reverse circulation drilling or induced polarisation surveys. The announcement does not disclose a timeline for results.
Platina controls a 100% interest in a portfolio of gold projects in the Yilgarn Craton in Western Australia. Its stated model is to create shareholder value by monetising projects through sale, joint venture or development.
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