Australian-listed Neu Horizon Uranium has identified a uranium exploration target extending more than two kilometres at its Storvallflon prospect in central Sweden, preparing a 4,000-metre diamond drilling programme for early 2027. The development follows Sweden’s decision to reopen uranium exploration and mining opportunities, creating renewed interest in the country’s domestic mineral resources.
Storvallflon forms part of Neu Horizon’s Krokom Black Shale Uranium Project. Integrated geophysical surveys, surface sampling and geological modelling have identified a large conductive structure that the company believes could host uranium-bearing black shale beneath the surface.
The latest results represent a transition from regional exploration to more detailed drill-target definition. However, the prospect remains at an early stage, with no declared mineral resource, established uranium reserve or economic assessment.
Multiple Exploration Methods Identify a Two-Kilometre Target
Neu Horizon combined five exploration techniques to investigate the geological structure and identify potential uranium mineralisation. These included airborne electromagnetic surveys, drone-based magnetic measurements, ground radiometric investigations, radon sampling and rock-chip geochemistry.
The datasets identified overlapping anomalies associated with a conductive geological structure extending more than two kilometres. The airborne electromagnetic programme used SkyTEM technology, with survey lines approximately 150 metres apart. Ground investigations also identified elevated uranium-equivalent readings, commonly exceeding 500 parts per million (ppm) and reaching approximately 1,800 ppm in selected measurements.
Laboratory analysis of 36 rock-chip samples by ALS returned uranium oxide concentrations ranging from 4 ppm to 243 ppm U₃O₈, averaging 67 ppm. Eight samples exceeded 100 ppm.
The difference between field radiometric readings and laboratory results is important. Spectrometer measurements estimate uranium-equivalent concentrations based on radioactive emissions, while laboratory assays directly measure uranium content in collected samples. Neu Horizon believes weathering and groundwater movement may have depleted uranium in exposed rocks, potentially leaving stronger mineralisation at depth. This remains a geological interpretation that must be tested through drilling.
Geological Modelling Points to Potential Mineralisation at Depth
Three-dimensional modelling of electromagnetic data suggests that the conductive black-shale sequence could form an antiform, an upward-arching geological structure created by deformation. Under this interpretation, the exposed surface represents only the crest of a folded sequence, with geological units potentially extending downwards along both sides.
The company considers the structure prospective because deformation and fluid movement can sometimes redistribute and concentrate metals within sedimentary formations. Neu Horizon is investigating similarities with the Ronneburg uranium district in Germany, where structural geological processes contributed to uranium mineralisation. Historical grades exceeding 900 ppm U₃O₈ have been cited as an example of the potential for geological structures to concentrate uranium.
Ronneburg is a geological comparison, not evidence of equivalent mineralisation at Storvallflon. The grade, thickness, depth and continuity of any uranium-bearing zones remain unknown.
4,000-Metre Drilling Programme Planned for 2027
Neu Horizon intends to begin a 4,000-metre diamond drilling campaign in the first quarter of 2027, subject to permitting and approval of the proposed programme by the Swedish Mining Inspectorate. Drilling will target the interpreted conductive structure through east-west sections, with proposed drill fences spaced approximately 200 metres apart.
The programme will investigate geological continuity, uranium concentrations beneath weathered surface material and the relationship between potential mineralisation and structural deformation. Results will help determine whether Storvallflon contains extensive low-grade shale mineralisation or more concentrated uranium-bearing zones.
These outcomes would have different implications for future development. Large volumes of low-grade material could require substantial processing infrastructure, while a more concentrated deposit could offer alternative development possibilities. Neither scenario has yet been demonstrated.
Sweden’s Uranium Mining Reforms Reopen Exploration Opportunities
Neu Horizon’s exploration activities follow significant changes to Sweden’s mining legislation.
The country introduced a prohibition on uranium extraction in 2018, restricting the development of dedicated uranium mining operations. The ban was repealed effective, restoring uranium’s status as a concession mineral under Swedish mining legislation.
Further legislative amendments took effect, changing the regulatory treatment of uranium extraction and processing and removing the specific municipal veto previously applicable under the nuclear-facility approval framework.
Local authorities and communities retain roles under other planning and environmental procedures. Sweden is also reviewing municipal influence over concession decisions involving alum shale, with a government review scheduled to report. The reforms allow companies to pursue uranium exploration and potentially apply for mining concessions, but individual projects must still satisfy environmental, radiation-protection and other regulatory requirements.
€5.4 Million Cash Position Supports Exploration
Neu Horizon reported approximately A$8.6 million in cash, equivalent to around €5.4 million. The company considers its available funds sufficient to support the planned Storvallflon drilling programme and broader Swedish exploration activities over the following two years.
The cash position reduces the immediate need for additional equity financing during the initial exploration phase. It should not be interpreted as funding for mine construction, which would require substantially greater investment.
Neu Horizon listed on the Australian Securities Exchange in July 2026 and holds five Swedish exploration projects covering more than 110,000 hectares. It also controls approximately 35,000 hectares of exploration interests along the northern margin of Canada’s Athabasca Basin.
Processing Costs and Environmental Requirements Remain Important
The commercial potential of Storvallflon will depend on more than uranium grades. Black-shale deposits can present processing challenges because relatively low uranium concentrations may require large volumes of material to be extracted and treated.
Mineralogy, uranium recovery rates, reagent consumption, energy requirements and waste management will all influence future project economics.
Black shales can also contain sulphide minerals and organic material, creating additional challenges for water management and processing residues. Environmental assessments will need to address potential uranium mobilisation in groundwater and surface water.
No recoverable by-product opportunity or commercially viable processing route has yet been established at Storvallflon.
European Uranium Supply Gains Strategic Attention
Sweden’s renewed interest in uranium exploration comes as European countries reassess nuclear energy’s role in electricity generation and industrial decarbonisation.
Developing domestic uranium resources could eventually contribute to supply diversification, although mining represents only the first stage of the nuclear fuel chain. Conversion, enrichment and fuel fabrication require additional specialised infrastructure and commercial arrangements.
Neu Horizon has not announced a production target, construction budget or uranium offtake agreement for Storvallflon. The immediate priority is to establish whether the two-kilometre geological anomaly contains uranium mineralisation with sufficient grade and continuity to justify further investment. The planned 2027 drilling campaign will provide the first direct test of the company’s geological interpretation and determine whether the prospect can advance towards resource definition.
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