Alkaline Rocks and Carbonatites of the World

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Lac Albanel

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Occurrence number: 
031-00-145
Country: 
Canada
Region: 
Quebec
Location: 
Longitude: -73, Latitude: 50.08

Several areas of peralkaline granite and gneissic nepheline syenite occur southeast of Lake Albanel. Three areas of granite were mapped by Neilson (1953, Map No. 918), the largest nearly 2 km across, but they cross into adjacent map areas so their full extent and development is not known. The rock is described as containing more than 10% quartz, some parts being quartz syenite rather than granite, microline (40%), hastingsite (20%) and a little aegirine. Nepheline syenites form a conformable lens, the rock consisting of microcline and orthoclase, a little albite, some 25% nepheline with intergrown cancrinite, green biotite, hastingsite, aegirine and accessories.

References: 
NEILSON, J.M. 1953. Albanal area, Mistassani Territory. Quebec Department of Mines, Geological Surveys Branch, Geological Report, 53: 1-35
Location: 
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith