GreenX Metals has put a conceptual copper-silver target at Tannenberg and a major Poland arbitration award at the centre of its next phase. The annual report also shows the cost of that strategy: a $12.34 million loss, a $4.42 million project impairment and continued reliance on equity funding.
- Tannenberg Exploration Target of 144-279Mt at 0.9-1.4% copper
- Year-end cash increased to A$13.42 million after a A$13.6 million placement
- Poland arbitration award remains a contingent asset pending appeals and enforcement
- A$4.42 million Arctic Rift impairment after the joint venture wind-up
- Initial Tannenberg drilling and metallurgical work are the next operating tests
Tannenberg moves from archive work to drilling
GreenX Metals Limited (ASX:GRX) is moving its German copper project from historical reconstruction into the more demanding phase of testing what is actually in the ground. Its Tannenberg Exploration Target covers 144 million to 279 million tonnes at 0.9% to 1.4% copper and 15 to 21 grams per tonne silver, representing a conceptual 1.3 million to 3.9 million tonnes of contained copper and 69.4 million to 188.4 million ounces of silver.
Those figures are not a Mineral Resource. The company says there has been insufficient exploration to estimate one, and that it remains uncertain whether further work will produce a JORC-compliant resource. The target is based on archived drilling, re-logged and re-sampled core, historical mine data and a geological model that extends mineralisation beyond the thin Kupferschiefer shale into surrounding sandstone and limestone.
GreenX completed its acquisition of a 90% interest in Group 11 Exploration, which holds the Tannenberg licences, during the year. The project area has expanded roughly seven-fold since the original 2024 agreement to about 1,900 square kilometres. The next work includes a potential seismic survey, access to historical underground workings for sampling and metallurgical testwork, and an initial drilling programme expected to begin in the coming months.
Metallurgy offers a baseline, not a mine plan
An early-stage mineralogy study found copper sulphides across shale, sandstone and carbonate host rocks, with chalcocite dominant alongside bornite, chalcopyrite and covellite. Independent review by MSA Mining Consulting UK considered conventional flotation an appropriate baseline, drawing comparisons with operating Kupferschiefer mines in Poland.
That comparison is useful but not definitive. Ten historical drill-core samples showed both coarse and very fine copper sulphide grains, a combination that could make grinding and flotation design important to eventual recovery. The study also identified organic carbon and minor deleterious elements that will need to be assessed in further testwork. No economic study or production decision has been reported.
The Poland award remains valuable but unavailable
The company’s largest potential source of value remains outside its mining portfolio. An arbitral tribunal awarded GreenX approximately £252 million in compensation and interest in 2024 after finding Poland had breached its treaty obligations. GreenX has not recognised the award as an asset because set-aside proceedings and appeals remain unresolved, leaving it classified as a contingent asset. The Singapore Court has rejected Poland’s ECT set-aside application, and the resulting appeal has been heard with the decision pending; separate BIT proceedings in England and Wales remain relevant.
That legal overhang matters to the balance sheet. GreenX ended June with A$13.42 million in cash, up from A$6.83 million, after raising about A$13.6 million through a placement. But the group recorded a A$12.34 million net loss, including A$3.29 million in arbitration-related costs, A$2.24 million in exploration and evaluation expenses and a A$4.42 million impairment of the Arctic Rift Copper project, which is being relinquished. The report says further financing will be required for exploration and development.
Eleonore North remains the second exploration leg, with gold, tungsten and antimony targets in East Greenland, including historical estimates that are also not JORC-compliant. Field sampling and bulk samples were collected for assay and metallurgical sighter work, while two new licences added about 1,600 square kilometres of prospective RIRGS tenure after year-end. Those results may broaden the portfolio, but they do not yet change GreenX’s status as a pre-production explorer with no JORC Mineral Resources or Ore Reserves.
Bottom Line?
The next meaningful evidence will come from Tannenberg drilling and metallurgical work, while GreenX’s financial flexibility still depends partly on how quickly, if at all, the Poland award can be enforced.
Questions in the middle?
- Will initial drilling confirm the scale, thickness and continuity assumed in the Tannenberg Exploration Target?
- Can further metallurgical work address the fine-grained sulphides and deleterious elements identified in the early study?
- When will the Singapore appeal and English BIT proceedings clarify whether the Poland award can become cash rather than a contingent asset?