How Did Gorilla Gold Triple Mulwarrie’s Gold Resource in Six Months?
Gorilla Gold has unveiled a major Mineral Resource upgrade at its Mulwarrie Gold Project in Western Australia, boosting contained gold ounces by 340% to 350,000 at a higher grade of 3.6 grams per tonne. This pivotal update sets the stage for further growth and development in a prolific gold region.
- Mulwarrie Mineral Resource Estimate increased to 350koz at 3.6g/t Au
- 340% rise in contained ounces and 29% improvement in grade
- 32% of resource classified as Indicated, supporting project confidence
- Resource spans both open pit and underground mining shapes
- Further drilling and engineering studies planned to expand resource
Significant Resource Growth at Mulwarrie
Gorilla Gold Mines Ltd has announced a transformative update to its Mulwarrie Gold Project, located 100 kilometres north of Kalgoorlie in Western Australia. The newly completed Mineral Resource Estimate (MRE) now stands at 3.0 million tonnes grading 3.6 grams per tonne gold, containing 350,000 ounces of gold. This represents a staggering 340% increase in contained ounces and a 29% uplift in grade compared to the previous resource estimate.
The upgrade is particularly notable given it was achieved with some extensional drill results pending, which are expected to contribute to the next resource update. The discovery cost remains impressively low at approximately A$15 per ounce, underscoring the efficiency of Gorilla Gold's exploration program.
Resource Classification and Mining Potential
Of the total resource, 32% is classified as Indicated, amounting to 110,000 ounces at 2.8 g/t gold, which provides a solid foundation for advancing the project towards feasibility studies. The resource is delineated within both open pit and underground mining domains. Open pit resources, reported at a 0.5 g/t cut-off, total 1.2 million tonnes at 2.7 g/t for 110,000 ounces, while underground resources, constrained within mineable shapes at a 1.1 g/t cut-off, comprise 0.9 million tonnes at 4.3 g/t for 130,000 ounces.
These classifications and cut-offs reflect realistic economic parameters, including a conservative gold price assumption of A$4,000 per ounce, which is approximately 25% below current spot prices. This conservative approach lends credibility to the resource's economic viability.
Advancing Towards Development
Gorilla Gold is moving swiftly to capitalise on this resource growth, with engineering studies set to commence at Mulwarrie. Concurrently, comprehensive metallurgical testwork is underway, building on previous results that demonstrated gold recoveries of up to 96% using conventional processing methods. These encouraging metallurgical outcomes support the project's potential for efficient gold extraction.
Looking ahead, the company plans to resume growth drilling in the September 2025 quarter, targeting a doubling of the Mulwarrie resource. This aggressive exploration strategy aligns with Gorilla Gold's broader ambition to expand its West Australian gold portfolio, which now totals 720,000 ounces at 3.9 g/t gold across its projects, pushing the group’s total resource base beyond one million ounces.
Regional Context and Strategic Positioning
Mulwarrie sits within a prolific gold region, adjacent to established haul roads and within reach of multiple operational mills, enhancing its logistical appeal. The project benefits from granted mining leases and a well-understood geological setting characterized by structurally controlled gold mineralisation in quartz reefs and shear zones. This geological clarity, combined with the recent resource expansion, positions Mulwarrie as a compelling development opportunity in the Eastern Goldfields.
Meanwhile, drilling continues at Gorilla Gold’s Comet Vale Project, with five rigs active and a major resource update anticipated in the fourth quarter of 2025, signaling ongoing momentum across the company’s asset base.
Bottom Line?
With a major resource upgrade now in hand, Gorilla Gold is poised to unlock further value at Mulwarrie as it advances towards development and expands its footprint in Western Australia’s goldfields.
Questions in the middle?
- How will the pending extensional drill results impact the next Mulwarrie resource update?
- What timeline is Gorilla Gold targeting for feasibility and potential production at Mulwarrie?
- How might metallurgical and engineering study outcomes influence project economics and scale?