Great Southern Mining Delivers Exceptional High-Grade Gold Results at Amy Clarke
Great Southern Mining (ASX: GSN) has delivered exceptional drilling results from its Amy Clarke prospect, with the Great Southern Mining gold discovery showcasing high-grade gold intercepts up to 23.9 g/t extending the known mineralisation across an impressive 4.5 kilometre strike length. Furthermore, the latest 8,000-metre air-core drilling programme has confirmed shallow gold mineralisation in semi-fresh rock, positioning Amy Clarke as a significant discovery within the company's 100% owned Duketon Gold Project in Western Australia.
Management Commentary
"GSN has methodically worked up the Amy Clarke prospect and these results confirm shallow gold over 4.5km of strike… Given the extensive strike length of the Amy Clarke surface gold anomaly and the prospect's location on known gold bearing structures, GSN sees significant gold potential at Amy Clarke."
– Matthew Keane, Managing Director
The standout 23.9 g/t gold intercept was drilled on the southernmost line of the mineralised shear zone with no drilling immediately south, suggesting strong potential for further extensions. Additionally, with assays still pending for 4,500 metres of additional drilling, GSN is well-positioned for continued discovery success.
Outstanding Recent Drilling Results Confirm Discovery Scale
GSN's October 2025 drilling programme at Amy Clarke has returned exceptional results from just 3,500 metres of the total 8,000-metre programme. Consequently, this represents only a portion of the total drilling completed, with significant additional results pending.
Key Intercepts – Amy Clarke 2025 Programme
| Drill Hole | Intercept | Grade | Depth |
|---|---|---|---|
| 25ACAC0007 | 2m | 23.9 g/t Au | from 10m |
| 25ACAC0057 | 11m | 1.2 g/t Au | from 25m |
| 25ACAC0057 | 6m | 1.7 g/t Au | within above |
| 25ACAC0067 | 2m | 1.5 g/t Au | from 30m |
These results build upon GSN's impressive 2021 drilling campaign, which established the initial Amy Clarke discovery. In addition, the consistent high-grade results demonstrate the robustness of this Great Southern Mining gold discovery.
Historic High-Grade Intercepts – 2021 Programme
| Drill Hole | Intercept | Grade | Depth |
|---|---|---|---|
| 21ACAC147 | 8m | 6.73 g/t Au | from 32m |
| 21ACAC147 | 4m | 12.5 g/t Au | within above |
| 21ACAC038 | 4m | 2.13 g/t Au | from surface |
The drilling has now defined gold intercepts over 1 g/t extending across a 4.5 kilometre strike. Moreover, zones of higher-grade gold anomalism are becoming evident for follow-up reverse circulation drilling scheduled for Q1 2026.
Understanding Orogenic Gold Systems: The Amy Clarke Advantage
Orogenic gold deposits represent some of the world's most significant gold resources, formed through complex geological processes involving structural deformation, fluid flow, and mineralisation. These systems are characterised by gold-bearing quartz veins and altered host rocks within major shear zones and fault systems.
At Amy Clarke, GSN has identified a structurally complex, multi-phase orogenic gold system with four distinct mineralisation styles:
- Quartz-vein hosted gold within shear zones featuring fine sulphide mineralisation
- Shear-related gold concentrated along lithological contacts between rock types
- Intrusive-contact gold associated with deformed intrusive margins
- Syn-deformational gold in axial-planar crack-seal quartz veins
This geological complexity is significant for investors because orogenic gold systems often contain multiple mineralised zones. Consequently, these systems can support large-scale, long-life mining operations. Furthermore, the presence of semi-fresh rock from surface indicates primary geological structures are preserved, enhancing the potential for high-grade mineralisation.
Why This Matters to Investors: Orogenic gold systems like Amy Clarke can host multi-million ounce deposits. The 4.5 kilometre strike length and multiple mineralisation styles suggest significant scale potential comparable to major regional producers.
Strategic Location Within Proven Gold District
Amy Clarke's location within the Duketon Greenstone Belt provides exceptional strategic advantages. For instance, the prospect sits 8-10 kilometres from Regis Resources' Garden Well processing facility, offering potential processing solutions and infrastructure synergies.
Regional Context & Infrastructure
| Nearby Operations | Distance | Resource/Production |
|---|---|---|
| Regis – Erlistoun Mine | 3.5km north | 320,000 oz gold |
| Regis – Garden Well Plant | 8-10km | Processing facility |
| Regis – Rosemont | Regional trend | >2 million oz |
| Regis – Baneygo | Regional trend | ~380,000 oz |
| Regis – Ben Hur | Regional trend | ~390,000 oz |
Amy Clarke is interpreted to lie on the same structural trend that hosts Regis Resources' Erlistoun open pit mine. This mine has produced 320,000 ounces of gold, demonstrating the productive nature of the regional geology. Additionally, the extensive gold-bismuth-lithium-tungsten surface geochemical anomaly extends five kilometres from the northern tenement boundary, indicating large-scale mineralising systems.
Strategic Positioning
Amy Clarke benefits from established regional infrastructure whilst sitting on proven gold-bearing structures. The proximity to existing processing facilities could significantly reduce future development costs and timeline to production.
Multiple Growth Catalysts Driving Near-Term Value
GSN has established a robust pipeline of exploration catalysts designed to create value across its Duketon Gold Project portfolio. The Great Southern Mining gold discovery at Amy Clarke represents just one component of this broader strategy.
Immediate Catalysts (Q4 2025 – Q1 2026)
November 2025:
- 4,500 metres of outstanding Amy Clarke assay results
- 7,000-metre RC drilling programme results from Golden Boulder discovery
- Diamond drilling results from Edinburgh Park JV (Queensland)
Q1 2026:
- Targeted reverse circulation drilling at Amy Clarke focusing on high-grade zones
- Maiden JORC Resource estimate potential at Golden Boulder
- Follow-up drilling along Amy Clarke's 4.5 kilometre strike
Golden Boulder Discovery Momentum
GSN's 7,000-metre RC programme at Golden Boulder targets three core objectives:
- Maiden JORC Resource definition across 650 metres of semi-contiguous mineralisation
- Extension drilling along 1.7 kilometres of prospective structural trend
- First-pass exploration across 1.3 kilometres of untested structural targets
Golden Boulder's location on the north-south structural trend hosting Regis Resources' major deposits provides additional validation of GSN's targeting approach. However, it's important to note that each prospect presents unique geological characteristics and exploration challenges.
Investment Thesis: Emerging Mid-Tier Gold Developer
Great Southern Mining is positioning itself as a significant gold discovery story within one of Australia's premier gold districts. The combination of high-grade results, extensive strike potential, and strategic location creates a compelling investment proposition for those interested in this Great Southern Mining gold discovery.
Key Investment Highlights
| Factor | Value Proposition |
|---|---|
| High-Grade Gold | 23.9 g/t intercepts with 4.5km strike |
| Strategic Location | 8-10km from processing plant |
| Proven District | Multi-million ounce regional endowment |
| 100% Ownership | No joint venture dilution |
| Multiple Projects | Diversified discovery pipeline |
Scale Potential Comparison
Amy Clarke's 4.5 kilometre strike length compares favourably with regional deposits. For example, Erlistoun Mine (3.5km away) hosts a 320,000 oz resource. Furthermore, the surface geochemistry shows a 5km continuous anomaly, whilst multiple mineralisation styles demonstrate orogenic gold system complexity.
The prospect's shallow mineralisation in semi-fresh rock provides excellent potential for open-pit mining scenarios. These typically offer superior economics compared to underground operations, enhancing the overall project value proposition.
Why Investors Should Monitor Great Southern Mining
GSN has demonstrated the ability to make significant gold discoveries within world-class mining districts. The company's systematic approach to exploration, combined with strategic asset positioning, creates multiple pathways to value creation.
Competitive Advantages
Geological Expertise: GSN's technical team has successfully identified and advanced multiple high-potential gold projects within proven mining districts. This expertise is clearly demonstrated through the Great Southern Mining gold discovery at Amy Clarke.
Strategic Positioning: All projects are located within 40 kilometres of operating mills and major operations. This provides infrastructure advantages and potential processing partnerships, reducing future development costs.
Discovery Pipeline: Multiple active drilling programmes across diverse geological settings reduce single-asset risk whilst maximising discovery potential. This diversified approach provides multiple opportunities for value creation.
Near-Term Catalysts Timeline
| Timeframe | Expected Catalysts |
|---|---|
| November 2025 | Outstanding assay results from 4,500m Amy Clarke drilling |
| December 2025 | Golden Boulder RC results and Edinburgh Park diamond drilling |
| Q1 2026 | Amy Clarke RC drilling and potential resource estimates |
Key Investment Takeaway
GSN has established itself as a systematic gold discoverer within Australia's premier mining districts. With high-grade results across 4.5 kilometres at Amy Clarke, multiple active drilling programmes, and strategic infrastructure proximity, the company offers compelling upside potential as exploration results continue to flow.
The combination of exceptional drill results, extensive strike potential, and strategic district positioning makes Great Southern Mining a compelling story for investors seeking exposure to Australian gold discovery plays. With multiple catalysts expected through Q1 2026, GSN warrants close monitoring as the company continues to create value across its diversified project portfolio through discoveries like the Great Southern Mining gold discovery at Amy Clarke.
Want to Capitalise on GSN's Gold Discovery Momentum?
Great Southern Mining's exceptional drilling results at Amy Clarke represent just the beginning of what could be a transformative period for the company. With outstanding assays still pending from 4,500 metres of additional drilling, multiple active programmes across world-class districts, and strategic proximity to existing processing infrastructure, GSN offers compelling exposure to Australian gold discovery potential. Don't miss the opportunity to evaluate this emerging gold story before the next wave of results arrive. Discover more about Great Southern Mining's complete project portfolio and upcoming catalysts.
