Rubix Resources Confirms Robust Zinc and Copper Hits at Paperbark

• Strong zinc and lead intervals at Paperbark with up to 20.6% Zn
• Notable increase in copper mineralisation at depth in JB Zone
• Ongoing geochronological studies at Curtin University
• Active exploration across Etheridge, Redbeds, Ceiling, and Lake Johnston projects
• Due diligence progressing on new Central African bauxite acquisition

Quarterly Exploration Highlights

Rubix Resources Limited (ASX – RB6) has delivered a comprehensive update for the quarter ending 31 December 2025, spotlighting encouraging assay results from its Paperbark Project in Queensland. The results, co-funded through the Collaborative Exploration Initiative (CEI), confirm the presence of broad mineralised zones consistent with earlier visual logging and expectations.

At the JB Zone within Paperbark, drilling intercepted a substantial 70.5-metre interval averaging 1.35% zinc and 0.38% lead, punctuated by high-grade sections reaching 20.6% zinc. Particularly noteworthy is the observed increase in copper mineralisation below approximately 370 metres downhole, aligning with historic data that suggested copper sulphide presence at depth. This spatial relationship between copper and zinc mineralisation could enhance the project's economic potential.

Broader Project Activity and Research

Beyond Paperbark, Rubix is advancing geochronological analyses at Curtin University to better understand the timing and context of mineralisation events. These studies will inform future exploration strategies across the Mount Isa Inlier region. The company also reaffirmed the prospectivity of the Grunter North area for copper, with vein textures and alteration patterns indicating hydrothermal fluid activity despite sub-economic copper grades to date.

Exploration efforts continue across Rubix’s diversified portfolio, including the Etheridge gold project in northern Queensland, where structural continuity of mineralised lodes is being assessed, and the Redbeds copper-cobalt project, where fieldwork and planning focus on the Fiery Creek target area. In Canada, the Ceiling lithium project saw renewal of key tenements, with desktop studies confirming the presence of lithium-bearing pegmatites within a prospective greenstone belt.

Financial Position and Corporate Developments

Rubix reported exploration expenditure of $48,000 for the quarter and maintained a cash balance of $173,000 at period end. The company continues to benefit from government funding, including a $250,000 CEI grant supporting Paperbark drilling activities. No mining production or development activities were recorded during the quarter.

On the corporate front, Rubix is actively pursuing new opportunities, with due diligence nearing completion on a Central African bauxite project. While early stage, this potential acquisition could diversify the company’s portfolio and add value for shareholders. The company remains cautious about other acquisition prospects, indicating a selective approach focused on strategic fit and development potential.

Outlook

Rubix Resources is positioning itself to leverage its growing knowledge base and diversified asset base. The integration of assay results, geochronological insights, and ongoing exploration across multiple commodities and jurisdictions underscores a methodical approach to value creation. Investors will be watching closely as further assay data and acquisition outcomes unfold in the coming quarters.

Bottom Line?

Rubix’s latest results reinforce its exploration credentials, but the path to commercialisation remains a work in progress.

Questions in the middle?

• How will the increasing copper grades at depth influence Paperbark’s development plans?
• What insights will the Curtin University geochronology studies provide for exploration targeting?
• What is the timeline and strategic rationale behind the Central African bauxite acquisition?