Great Southern Mining Gold Discovery Delivers Exceptional High-Grade Results

Great Southern Mining Limited (ASX: GSN) has delivered another impressive set of drilling results from its 100% owned Golden Boulder discovery at the Duketon Gold Project in Western Australia. The latest assays confirm the continuity of shallow, high-grade gold mineralisation across the northern portion of this 3.7km prospective trend. This Great Southern Mining gold discovery represents a significant development in one of Western Australia's most proven gold regions.

The latest results from the first 27 holes (1,944m) of a comprehensive 56-hole program have returned standout intercepts including 6m at 6.7 g/t Au from 48m in hole 25GBRC054, featuring a spectacular 1m at 34.5 g/t Au. Furthermore, additional highlights include 5m at 5.1 g/t Au from 25m and multiple intersections exceeding 9m in width with grades ranging from 1.1 g/t to 1.8 g/t Au.

Strategic Location in Proven Gold Territory

Golden Boulder occupies a highly strategic position between two major gold operations: Regis Resources' (ASX: RRL) multi-million-ounce Duketon Project and Genesis Minerals' (ASX: GMD) newly acquired Laverton tenure. This prime real estate sits on a prominent north-south structural trend that hosts multiple established gold deposits.

Consequently, the location provides exceptional advantages for future development and resource expansion opportunities.

The Golden Boulder area contains over 50 historical workings spanning the 3.7km strike length. Moreover, historical production records from 1900-1955 show 1,915 tonnes at 28.6 g/t Au for 1,761 ounces of gold. This demonstrates the long-standing recognition of the area's mineralisation potential.

Latest Drilling Results Confirm Discovery Potential

The 2025 drilling campaign has delivered exceptional results that validate the Great Southern Mining gold discovery potential. In addition to the headline intercepts, the consistency of mineralisation across multiple holes demonstrates robust geological continuity.

Key Intercepts from 2025 RC Program:

Previous Results Demonstrate Consistency:

The latest results build on previous exceptional intercepts, including:

• 5m at 14.57 g/t Au from 41m (including 1m at 70.94 g/t Au)
• 8m at 3.90 g/t Au from 44m (including 4m at 6.80 g/t Au)
• 4m at 5.64 g/t Au from 63m (including 2m at 9.89 g/t Au)

These results underscore the significance of mining news regarding this substantial discovery. However, the true scale of mineralisation remains to be fully defined through ongoing exploration activities.

Understanding Gold Grade: What These Numbers Mean

Gold grade is measured in grams per tonne (g/t), representing the amount of gold contained within a tonne of ore. To put GSN's results in perspective, understanding these benchmarks is crucial for evaluating the discovery's commercial potential.

For instance, different grade ranges indicate varying economic viability:

• 0.5-1.0 g/t Au: Typically considered low-grade but potentially economic in large deposits
• 2-5 g/t Au: Medium to high-grade, often economic for open-pit mining
• 5+ g/t Au: High-grade, particularly attractive for mining operations
• 10+ g/t Au: Very high-grade, indicating exceptional mineralisation

Golden Boulder's intercepts of 34.5 g/t Au and 23.9 g/t Au represent exceptional high-grade gold mineralisation. Furthermore, the consistent 1-6 g/t Au grades across multiple holes demonstrate the robust nature of the discovery.

The asx mining stocks sector has shown considerable interest in such high-grade discoveries, particularly when positioned in established gold regions.

Upcoming Catalysts and Expansion Plans

The company has outlined several key milestones that will drive value creation throughout 2026. These catalysts represent significant opportunities for the Great Southern Mining gold discovery to expand in both scale and resource confidence.

Immediate Milestones:

• Mid-February 2026: Remaining 29 hole assays expected from southern portion
• February-March 2026: Drilling program recommencement

Strategic Drilling Objectives:

1. Deep Diamond Drilling: Testing mineralisation at depth (co-funded by Western Australian Government EIS)
2. RC Drilling Extensions: Focused on strike and depth extensions
3. Resource Definition: Working towards maiden JORC Mineral Resource in northern prospect area

The company has strategically focused initial drilling on the northern 650m of the 3.7km trend. Consequently, the southern 2km+ remaining largely untested represents significant exploration upside potential.

This systematic approach to exploration follows mining investment strategies that prioritise methodical resource definition whilst maintaining substantial upside potential.

What Makes Golden Boulder Unique?

Several factors distinguish this discovery from typical early-stage gold projects. The shallow mineralisation profile suggests potential for low-cost extraction methods, whilst the high-grade zones indicate robust economic potential.

The proximity to established operations provides access to existing infrastructure and processing capabilities. In addition, the geological setting within proven gold-bearing structures enhances confidence in resource continuity.

These characteristics align with successful mining company profiles that have developed significant gold resources in Western Australia.

Amy Clarke Prospect Adds Regional Scale

Complementing Golden Boulder, GSN's Amy Clarke prospect has defined gold mineralisation over a 4.5km strike length through recent aircore drilling. This additional prospect significantly expands the company's resource potential across the broader project area.

Key intercepts from Amy Clarke include:

• 17m at 1.4 g/t Au from 20m (including 1m at 11.2 g/t Au)
• 2m at 23.9 g/t Au from 10m
• 11m at 1.2 g/t Au from 25m

Amy Clarke is scheduled for RC drilling in 2026, potentially adding significant scale to GSN's Duketon Gold Project. However, the primary focus remains on advancing the Great Southern Mining gold discovery at Golden Boulder.

Investment Thesis: Why Golden Boulder Matters

The investment case for GSN centres on multiple compelling factors that distinguish it from other exploration opportunities. These strategic advantages position the company for potential value creation through resource expansion and development pathways.

Strategic Advantages:

1. Prime Location: Positioned between proven multi-million-ounce deposits in a prolific gold region
2. Shallow Mineralisation: Gold intercepts from surface to moderate depths, suggesting potential for low-cost open-pit mining
3. High-Grade Zones: Consistent high-grade intercepts indicate robust mineralisation system
4. Exploration Upside: Only northern third of 3.7km trend systematically drilled
5. Government Support: EIS co-funding for deeper diamond drilling validates project potential

Key Differentiators:

These factors combine to create a compelling investment proposition that balances discovery potential with development feasibility.

Why Investors Should Follow Great Southern Mining

Great Southern Mining has systematically built a compelling gold discovery at Golden Boulder through methodical exploration in one of Western Australia's most proven gold regions. The company's strategic position between established multi-million-ounce operations, combined with consistent high-grade results and significant untested strike potential, positions GSN as a compelling exploration story.

With government co-funding secured for deeper drilling and remaining assays pending from the southern portion of the trend, the coming months could deliver significant value catalysts. Furthermore, the proximity to existing infrastructure and processing facilities provides a clear pathway to potential development.

The Great Southern Mining gold discovery represents more than just another exploration project. For instance, the combination of proven geology, exceptional grades, and strategic location creates multiple pathways for value creation.

Key Takeaway:
"Great Southern Mining has established Golden Boulder as a significant gold discovery in the heart of Western Australia's premier gold region. With over 2km of prospective strike length still to be systematically tested and exceptional grades confirmed to date, GSN represents a compelling exploration opportunity with near-term catalysts and clear development pathways."

Managing Director Matthew Keane's Commentary:
"Early drilling results from the late-2025 RC program at Golden Boulder have delivered a very strong start, reinforcing our confidence in the continuity of shallow, high-grade mineralisation in the northern portion of the 3.7km prospective trend. Golden Boulder is located between the multi-million-ounce gold deposits of Regis Resources' Duketon Project and Genesis Minerals' newly acquired Laverton tenure. It is shaping up to be a very exciting gold discovery in a prolific gold producing region."

Ready to Discover Great Southern Mining's Golden Boulder Opportunity?

Great Southern Mining's exceptional drilling results at Golden Boulder represent a compelling investment opportunity in one of Western Australia's most proven gold regions. With high-grade mineralisation confirmed, significant untested strike length remaining, and government co-funding secured for deeper drilling, GSN is positioned for substantial value creation in 2025. Don't miss the opportunity to learn more about this strategic gold discovery positioned between multi-million-ounce operations. Visit Great Southern Mining's website to explore the full investment thesis and discover why Golden Boulder could be your next strategic investment opportunity.