KEY HIGHLIGHTS

  • OCT shares fell 25% to $0.033 on 29 April 2026, with Market Capitalisation declining to approximately $5.25 million on Volume of 1,564,213 shares.
  • The company reported significant intercepts from its inaugural drilling campaign at the Federation Project in western Tasmania, the first program in nearly 50 years, including 6m at 0.79% Cu, 336.7ppm In, 93.9ppm Ag and 0.59% Sn in hole OFD005.
  • A new antimony-zinc lode was discovered during the campaign, remaining open in all directions, adding to a polymetallic system that includes copper, indium, silver, tin, bismuth, and zinc — several of which are classified as critical minerals globally.

Octava Minerals Limited (ASX:OCT) declined $0.010 or 25% to close at $0.033 on April 29, 2026, against a bid-offer spread of $0.033 to $0.037. Trading Volume of 1,564,213 shares was notably elevated for a stock of this Capitalisation, suggesting a deliberate repositioning by holders in response to the drilling results released on the day. Market Capitalisation fell to approximately $5.25 million. The decline occurred simultaneously with the release of drilling results from the Federation Project in western Tasmania — results that, on Face Value, demonstrated meaningful polymetallic mineralisation including critical mineral species. The apparent disconnect between a constructive exploration update and a 25% share price decline is a characteristic feature of early-stage micro-cap explorers, where investor expectations, funding concerns, and the quality of results relative to prior speculation all interact to drive short-term price behaviour.

 

The Federation Project: First Drilling in Nearly Five Decades

The Federation Project is located 12 kilometres west of the town of Zeehan in western Tasmania, a region with a long and well-documented history of polymetallic mineralisation. The project covers approximately 121 square kilometres across two granted exploration licences, EL 16/2023 and EL 1/2023, and is well positioned in proximity to Mining centres, processing facilities, and Hydro Power Stations — infrastructure characteristics that are of material relevance when assessing the eventual logistics of any potential development scenario.

The drilling programme completed by Octava represents the first systematic exploration campaign at Federation in approximately 50 years. The eight-hole diamond drilling programme totalled 1,460.9 metres, with the majority of holes focused on the Sweeney's Prospect, and one hole testing the Anomaly 1 target located 750 metres east-northeast of Sweeney's. Assay results had been received for the first six holes (OFD001 through OFD006) at the time of the announcement, with results pending for OFD007 and OFD008.

 

Drill Results: Critical Mineral Intercepts of Note

The headline intercepts from the campaign include several results of genuine geological interest. Hole OFD005 returned 15.6 metres at 0.53% copper, 204.7 parts per million (ppm) indium, 59.6ppm silver, 400.2ppm bismuth, 0.41% zinc, and 0.40% tin from 126.4 metres, including a higher-grade interval of 6 metres at 0.79% copper, 336.7ppm indium, 93.9ppm silver, and 0.59% tin from 130 metres. Indium — a rare critical mineral used extensively in transparent conductive coatings including LCD screens and solar panels — is notable both for its Scarcity and for the significant concentration achieved in this interval.

Hole OFD003 intersected a newly discovered antimony-zinc lode below the main polymetallic zone, returning 2 metres at 1.85% antimony, 2.38% lead, and 7.95% zinc from 137 metres. This new lode remains open in all directions, representing a distinct and previously unrecognised mineralised target within the Federation system. Antimony has received significant recent policy attention as a critical mineral given its applications in flame retardants, lead-acid batteries, and increasingly in military and semiconductor applications.

 

Geological Model: Three Mineralisation Styles and a Feeder Target

Octava's geological interpretation from the initial programme has identified three main mineralisation styles at the Sweeney's Prospect. Near-surface planar vein-hosted mineralisation exists within a broader disseminated tin halo. Below this, a sulphide breccia pipe — interpreted as a feeder system — plunges steeply to the south-southeast within an alteration halo of manganosiderite and silicification. The newly discovered antimony-zinc lode lies to the west of this breccia pipe feeder. This three-component geometric model suggests a structurally coherent polymetallic system with potential for significant mineralised volumes if the feeder target proves to have the dimensions and continuity that current Geophysical surveys suggest.

A critical finding from OFD005 was the confirmation of feeder-style mineralisation in a modern drill hole with excellent location control, which supports the company's intention to pursue targeted deeper drilling of the feeder. Downhole electromagnetic (DHEM) surveys completed at the conclusion of multiple holes have refined the geometric interpretation of the feeder target, suggesting a pipe-like geometry with relatively small but highly conductive modelled plates. OFD007, the deepest hole of the campaign, deviated away from its planned target and represents an interpreted near-miss of the feeder system rather than a negative result. Both OFD007 and OFD008 are cased and ready for additional DHEM testing.

 

Next Steps: Growth Targets Across a Prospective System

Octava has outlined several near-term exploration objectives that could maintain geological momentum at Federation. The sulphide breccia feeder remains open down plunge, the newly discovered antimony-zinc lode is open in all directions, potential parallel lodes blind at surface represent prospective targets outside the immediate drilling area, and the approximately 750-metre strike zone between the Sweeney's and Anomaly 1 prospects remains essentially untested. The scope of potential exploration activity across this 2-kilometre target corridor — and across a project that covers 121 square kilometres — is substantial.

 

Conclusion

Octava Minerals' 25% share price decline on April 29, 2026 occurred despite drilling results that demonstrated genuine polymetallic mineralisation — including the discovery of a new antimony-zinc lode and significant copper-indium intercepts at the Sweeney's Prospect. The market's reaction likely reflects the early-stage nature of the project, the small Capitalisation and limited Liquidity of the stock, and the gap between initial exploration results and the long development pathway to production. The Federation Project retains geological merit, with multiple open targets and a feeder-style system that remains incompletely tested.

Disclaimer: This article is for informational purposes only and does not constitute financial or Investment advice