Tysfjord - Norway

The Tysfjord pegmatite field covers an area of approximately 50x40 km² within the Hamarøy municipality. The pegmatite bodies are of the NYF type and contain, beside the major minerals quartz, K-feldspar, plagioclase and mica, the accessory minerals allanite-(Ce), columbite-(Fe), fergusonite-(Y), fluorite, garnet, and beryl. They are up to 400 m in length and have cigar- and lens-like shapes with commonly concentric, mineralogical zoning with large massive quartz cores. They are most exposed around the village Drag where the district-scale (25x22 km) and prospect-scale (4x2 km) demonstration sites are situated. With 1800 Ma the pegmatites show the same age like their host rock: the Tysfjord granite. They underwent amphibolite facies metamorphosis during Caledonian orogenesis, which resulted in partial re-crystallization and shearing of the pegmatite bodies.