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Highlights
Great Boulder Resources reports strong recovery rates from Mulga Bill metallurgical testing
Testwork indicates low cyanide levels have minimal effect on recovery efficiency
Engineering studies continue as work advances across Side Well and Ironbark deposits
Great Boulder Resources Ltd (ASX:GBR), part of the broader gold exploration space on the Australian Securities Exchange, has provided updates from its operations in Western Australia. As part of the ASX-listed mining cohort tracked within indexes such as the all ordinaries and asx 200, the company has highlighted new metallurgical results from its Mulga Bill Project.
The company’s operations fall under the gold exploration and development segment, which has shown notable presence in Western Australia’s resource-rich territories. The metallurgical testwork conducted represents the second phase of analysis at the Mulga Bill Project, with new findings centred on recovery rates at reduced cyanide concentrations.
Cyanide Efficiency and Recovery Outcomes
According to the company, the latest metallurgical assessments have demonstrated that gold recovery remains consistently high even at lower cyanide concentrations. The recovery tests were carried out at various grind sizes, with reports showing that coarser grinds continue to deliver favourable outcomes.
This aspect of coarse grinding contributes to processing efficiency, with the implication of lower operational energy requirements. The findings also showed minimal change in recovery effectiveness despite the reduced reagent concentration, reinforcing previous indications from earlier metallurgical programs.
Processing and Engineering Cost Implications
Managing Director Andrew Paterson noted the fast leaching behaviour of Mulga Bill ore, especially when processed at a coarse grind size. This efficiency, coupled with low cyanide use, is aligned with processing designs aimed at reducing both capital and operational costs.
Such performance characteristics could reduce the need for extensive infrastructure, such as large leach tanks, due to the relatively fast gold leaching kinetics observed. These aspects are being examined further as the company continues evaluating engineering configurations for future development options.
Project Development Across Side Well and Ironbark
Alongside ongoing metallurgical studies, Great Boulder Resources continues advancement activities across multiple other assets. The Eaglehawk deposit is undergoing resource expansion efforts, while exploration drilling is being carried out at the Side Well South area.
Additionally, a Scoping Study at the Ironbark deposit is in progress. The company has outlined that further updates from this study are anticipated shortly. These efforts are part of a broader development strategy across the Side Well Project area, consolidating results and planning pathways for future technical and economic evaluations.
Great Boulder in Context of Broader Mining Landscape
With a presence on the ASX under ticker GBR, Great Boulder Resources joins other companies in the gold and base metals segment operating across key mining jurisdictions in Western Australia. The focus on metallurgy, efficiency, and exploration aligns the company within a competitive landscape influenced by resource demand, processing innovation, and geological potential.
As part of a broader trend in the asx 200 and all ordinaries indexes, gold-focused companies continue to report fieldwork, resource expansion, and technical study outcomes. The Mulga Bill results represent a stage in the development pipeline driven by metallurgical validation and regional geological exploration.
