AnorTech has identified water depths of at least 15 metres at low tide within 20 metres of the shoreline near its Gronne Bjerg anorthosite project in Greenland, establishing a potential route for exporting bulk minerals and alumina without extensive port infrastructure. The findings come from a bathymetric survey of the preferred port area, which covered approximately 1.98 kilometres of shoreline. The measured depths could accommodate Panamax-class bulk carriers, which typically require drafts of around 12–14 metres and can transport up to approximately 80,000 deadweight tonnes.
The survey also found that the anorthosite body extends towards the proposed port location, raising the possibility of a short transportation route between the deposit and a future ship-loading facility.
Deep-Water Access and Project Infrastructure
Natural deep water close to the mineral deposit could reduce the infrastructure required to establish an export route. Remote Arctic mining projects can require substantial investment in access roads, extended jetties, dredging or specialised trans-shipment systems to move bulk materials to international markets. For Gronne Bjerg, the proximity of suitable water depths to the shoreline could limit construction requirements and simplify the movement of material from the proposed mining operation to ships.
The survey results will be incorporated into the project’s Terms of Reference, environmental baseline studies and technical documentation supporting an application for an exploitation licence. 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, alongside other advanced-material applications.
Alumina Processing and Pilot-Scale Testing
AnorTech has already shipped approximately 15 tonnes of anorthosite for pilot-scale processing tests. The company is developing processing methods intended to convert the rock into alumina with lower emissions than conventional production based on bauxite. Commercial-scale performance has yet to be demonstrated. The processing programme will need to establish alumina recovery rates, energy consumption and product quality to determine the viability of the proposed production route.
The bathymetric results address one element of the project’s infrastructure requirements but do not establish its overall economics, processing recoveries or financing needs.
Technical and Commercial Assessments Remain Ahead
The availability of deep water near the deposit could reduce the capital and construction requirements associated with exporting large volumes of material. These factors will be relevant as AnorTech advances the technical studies and documentation required for the project’s potential development. The next key assessment concerns the processing technology. Pilot-scale results will need to demonstrate whether anorthosite can be converted into alumina with competitive recoveries, energy requirements and product specifications. The combination of a potential processing route for alumina and direct access to deep-water shipping forms part of the technical basis being evaluated for the development of Gronne Bjerg.
