Octava Minerals Defines Massive Byro Exploration Target with Strong Bioleaching Potential
Octava Minerals has outlined a colossal exploration target of up to 7.4 billion tonnes of mineralised black shale at its Byro Project, featuring rare earths, lithium, and vanadium grades that align with promising bioleaching recoveries. First drilling in nearly 50 years at the Federation Project in Tasmania yielded significant polymetallic intercepts.
- Byro exploration target between 4.9 and 7.4 billion tonnes
- Significant polymetallic intercepts at Federation drilling
- Bioleaching tests show 70-80% recoveries in 21 days
- Byro acquisition completed, advancing toward maiden resource
- Cash at $356K with capital raising options underway
Byro Project Unveils Gigantic Critical Minerals Target
Octava Minerals (ASX:OCT) has reported a staggering exploration target at its Byro Critical Minerals Project in Western Australia, estimating between 4.9 billion and 7.4 billion tonnes of mineralised black shale. This vast tonnage hosts critical commodities including rare earth oxides (TREO), lithium oxide (Li2O), and vanadium oxide (V2O5) with grades ranging from 207 to 431ppm TREO, 159 to 331ppm Li2O, and 173 to 359ppm V2O5 respectively. The mineralisation extends over a 12km by 14km area and lies within 50 metres of surface across a 35km known strike length.
The company’s maiden aircore drilling program completed in February 2026 delivered 16 holes totalling 870 metres, delineating a significant footprint of mineralised black shale within the Coyrie formation. Notably, individual 3-metre intervals returned grades as high as 628ppm TREO, 368ppm Li2O, and 507ppm V2O5, underscoring the potential scale and quality of the deposit.
Bioleaching Advances Offer Sustainable Processing Edge
The next phase involves laboratory and continuous column scale heap bioleaching trials to optimise operating parameters and assess technical risks, with site-based heap trials planned upon successful outcomes. Concurrently, further drilling is slated to advance towards a maiden mineral resource estimate.
Federation Project Drilling Reveals Polymetallic Mineralisation
In Tasmania, Octava completed its first drilling program in nearly 50 years at the Federation Cu-Zn-Ag-Sn Project. Eight diamond drill holes totalling 1,460.9 metres targeted the Sweeney’s and Anomaly 1 prospects, returning significant intercepts including 6 metres at 0.79% copper, 336.7ppm indium, 93.9ppm silver, and 0.59% tin, as well as a 2-metre intercept grading 1.85% antimony, 2.38% lead, and 7.95% zinc. These results confirm multiple mineralisation styles including vein, disseminated, and sulphide breccia pipe (feeder) mineralisation, with targets remaining open at depth and along strike.
Downhole electromagnetic surveys suggest the sulphide breccia pipe has a pipe-like geometry, enhancing the prospectivity of this polymetallic system. The company plans to test the 750-metre gap between Sweeney’s and Anomaly 1, alongside further down-plunge and parallel lode targets.
East Kimberley JV and Corporate Position
The East Kimberley Project, under joint venture with Future Metals NL, saw no exploration activity this quarter as Octava focuses on its flagship projects. Financially, the company ended the quarter with $356,000 in cash and no debt, having spent $422,000 on exploration and evaluation. Director payments totalled $119,000, with an additional $50,000 paid as part of the Byro acquisition.
With less than two quarters of cash runway, Octava is actively considering capital raising options including placements and entitlement offers to fund ongoing exploration, metallurgical testwork, and geophysical surveys planned for the next quarter.
Strategic Implications and Upcoming Catalysts
Octava’s massive exploration target at Byro, combined with encouraging bioleaching recoveries, positions the company at the forefront of sustainable critical minerals extraction in Western Australia. Meanwhile, the Federation Project’s polymetallic intercepts revive interest in a historically underexplored Tasmanian district with diverse base and precious metals.
Investors will be watching how Octava manages its funding needs to sustain momentum, particularly as it moves towards a maiden resource at Byro and expands drilling at Federation. The success of heap bioleaching trials could be a game-changer, potentially lowering costs and environmental impact in a sector under increasing scrutiny for sustainability.
Bottom Line?
Octava’s scale at Byro and promising bioleaching advances could redefine critical minerals extraction economics, but funding constraints loom as the company pushes toward resource definition.
Questions in the middle?
- Will Octava’s bioleaching trials translate into viable commercial-scale processing?
- How will the company bridge its funding gap to sustain exploration momentum?
- Can Federation’s polymetallic system deliver a new Tasmanian base and critical metals hub?
