Alkaline Rocks and Carbonatites of the World

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Nachicapau Lake

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Occurrence number: 
031-00-149
Country: 
Canada
Region: 
Labrador
Location: 
Longitude: -68.25, Latitude: 56.8

A cancrinite-arfvedsonite pegmatite occurs on two small islands in a narrow arm along the north side of Nachicapau Lake. Arfvedsonite crystals up to 2x0.2 cm lie in a groundmass of cancrinite and very fine grained magnetite. Analyses of the rock, cancrinite and arfvedsonite are available (Dressler, 1981, p. 1761). Possibly related to the Castignon Lake occurrence (031-00-150) which is some 40 km further west.

References: 
DRESSLER, B. 1981. Post-tectonic igneous rocks: north-central Labrador geosyncline. Canadian Journal of Earth Sciences, 18: 1758-62.
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith