Great Southern Mining looks to be turning its Golden Boulder prospect from a promising gold prospect into something far more substantial, with new assays confirming high-grade mineralisation from surface and continuity across the first 1.1km of a 3.5km mineralised trend in Western Australia’s Duketon Belt.
asserted
Mining → look → Belt
The results come from the company’s ongoing 14,000-metre reverse-circulation (RC) drilling program at Golden Boulder, a discovery within its 100 per cent-owned Duketon gold project.
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results → come → project
The 549-square-kilometre holding sits in the Laverton–Duketon district and captures some serious gold-bearing real estate.
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holding → sit → estate
It includes 7km of the Garden Well trend, 11km of the Rosemont trend and 8km of the Erlistoun trend - key structural corridors that host major gold deposits elsewhere in the belt.
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that → include → belt
The latest 18 holes have delivered a standout 4m at 11.38 grams per tonne (g/t) gold from 45m, including 1m at 29.71g/t.
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holes → deliver → /
Another hole returned 9m at 3.36g/t from 127m, including 4m at 6.77g/t, while other notable hits featured 2m at 7.27g/t from 70m and 3m at 3.88g/t from 60m.
All reported intervals are downhole lengths, with true widths yet to be confirmed.
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widths → return → m.
The assays have extended known mineralisation by up to 50m down-dip and identified high-grade mineralisation in previously undrilled sections.
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assays → extend → sections
‘The company firmly believes that both Golden Boulder and the wider Duketon gold project has potential for a substantial gold endowment.’Great Southern Mining managing director Matthew Keane
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Boulder → believe → Keane
Across Golden Boulder, mineralisation has been traced along three parallel trends called the Main Line, Eastern Line and Ogilvies.
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mineralisation → trace → trends
Drilling has intersected multiple stacked quartz-vein lodes with disseminated sulphides, including pyrite and arsenopyrite, hosted in basalt and minor dolerite.
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Drilling → intersect → basalt
The company is testing whether this network of steep gold-bearing structures continues below and between the shallow workings.
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network → test → workings
The results also reinforce the prospect’s continuity.
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results → reinforce → continuity
All but four of the 38 holes reported to date from the current RC program have returned mineralised intercepts grading above 0.7g/t gold, a pattern management says points to a prolific gold-bearing structural trend rather than a collection of isolated hits.
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management → report → hits
Great Southern Mining managing director Matthew Keane said: “These latest high-grade intercepts, in conjunction with previous results from 2025 and 2026 drilling, show that Golden Boulder is a high-grade gold discovery, mineralised from surface with continuity of mineralisation along ~1.1km of the 3.5km trend.
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Boulder → manage → trend
The company expects to complete the current campaign by mid-to-late October before immediately rolling into another phase of drilling.
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company → expect → drilling
Material step-outs at depth will be the focus, targeting extensions below an area that remains virtually untested, with few holes extending beyond 150m below surface.
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that → target → surface
Assays are pending for another 3425m from 39 holes at Golden Boulder, covering much of the remaining 2.5km of the Main Line trend.
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Assays → pende → trend
A further 2248m from 18 RC holes is awaiting results at Amy Clarke, an emerging discovery 3km north-east of Golden Boulder where shallow mineralisation has been traced across 4.7km.
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mineralisation → await → km
The Golden Boulder area is steeped in history, with more than 50 mine shafts left by old-timers dotted across a 3.7km strike length.
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area → leave → length
Old-timers reportedly pulled out 1761 ounces of gold from 1915 tonnes of ore between 1900 and 1955 at a remarkable average grade of 28.6g/t.
Golden Boulder is one of several Duketon targets Great Southern is testing as it builds a broader gold inventory.
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it → pull → inventory
Amy Clarke is another emerging discovery, while Goldfinger is an additional target within the company’s 100 per cent-owned holding.
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Goldfinger → emerge → holding
Nearby, Regis Resources has defined more than 7.5 million ounces just north of Great Southern’s tenure, including the two-million-ounce Rosemont deposit and the five-million-ounce Garden Well mine.
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Resources → define → deposit
Golden Boulder sits 26km from Rosemont and 14km from Regis’ Garden Well mine and processing facility.
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Boulder → sit → mine
With gold commanding around US$4142 (A$5943) an ounce, a sizeable system near established roads and processing infrastructure could carry real strategic weight if drilling confirms its scale.
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drilling → command → scale
With high-grade gold consistently being hit from surface and a 3.5km mineralised corridor wide open at depth, Golden Boulder has plenty of room to grow.
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Boulder → hit → room
Upcoming assays and the next phase of drilling could now determine whether it can earn its place as a genuine Duketon gold system.
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it → determine → system
Is your ASX-listed company doing something interesting?
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company → list → something
The Aporia
