High-grade uranium deposit in Paleoproterozoic basement window
The main economic mineral potential in the Orrefjell prospect is associated with Rössing-type pegmatite-hosted high-grade uranium mineralisation.
The Paleoproterozoic Orrefjell basement window is situated in an under-explored terrain in northern Norway. The location of the Orrefjell uranium deposit is controlled by a combination of structure and lithology. The contact zone between alaskite-type pegmatites and graphite-bearing schists rocks represents the favourable condition for mineralisation.
The Orrefjell mineralisation is located on- or close to a crustal scale structure running across the Fennoscandian shield. The style of the mineralisation as well as the equivalent age suggest relationship to highly significant IOCG deposits located along the same structures e.g. in the Kiruna district.
The inferred resource calculation based on the NGU core data is estimated to 155,000 tons with 0.0725 % U3O8.
This conservative estimate is only extrapolated to a 50 m depth along the thrust zone with a horizontal strike of 1100 m. Our investigations show the mineralised thrust zone is likely to reach at least 400 m depth with a horizontal strike of at least 2000 m.
Investor presenation and Project description for PDAC 2010 is available for download in PDF format:
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