AnorTech has confirmed favourable deep-water conditions near its Gronne Bjerg anorthosite project in Greenland, potentially reducing infrastructure costs and simplifying export logistics for the proposed mineral and alumina development.
A bathymetric survey identified at least 15 metres of water depth at low tide within 20 metres of shore, potentially accommodating Panamax-class bulk carriers with drafts of approximately 12–14 metres and capacities of up to 80,000 deadweight tonnes. The survey covered around 1.98 kilometres of coastline.
Shorter Export Route Could Reduce Costs
The anorthosite deposit extends towards the proposed port location, creating the possibility of a short mine-to-ship transport route. This could reduce the need for expensive infrastructure, including long jetties, extensive access roads, dredging and specialised trans-shipment systems, which can significantly increase costs for remote Arctic mining projects.
The survey results will support Gronne Bjerg’s Terms of Reference, environmental baseline studies and technical documentation for an exploitation-licence application.
Anorthosite Processing Targets Lower-Emission Alumina
Located approximately 80 kilometres northeast of Nuuk, Gronne Bjerg is being evaluated as a potential source of anorthosite for producing smelter-grade alumina and high-purity alumina, as well as materials for other advanced industrial applications.
AnorTech has already shipped approximately 15 tonnes of anorthosite for pilot-scale processing tests. Its technology aims to produce alumina with lower emissions than conventional bauxite-based processes, although commercial-scale performance has yet to be demonstrated.
Processing Results Remain Key to Project Viability
The confirmed water depth reduces uncertainty surrounding export infrastructure but does not establish the project’s overall economics, processing recoveries or financing requirements. Commercial viability will depend on processing performance, energy consumption, product quality and development costs. The next major milestone is demonstrating competitive alumina processing results. If the technology proves commercially viable, combining a potentially lower-emission production route with deep-water access close to the deposit could strengthen Gronne Bjerg’s development prospects and competitiveness in the alumina market.
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