Alkaline Rocks and Carbonatites of the World

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Ile Cadieux

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Occurrence number: 
031-00-123
Country: 
Canada
Region: 
Montreal area
Location: 
Longitude: -74, Latitude: 45.03

The Ile Cadieux pipe is exposed on a low hill 180 m in diameter, but contacts cannot be seen. The rock is alnoitic consisting of phlogopite, forsterite, monticellite, titansalite and melilite with accessory apatite, magnetite, perovskite, calcite, scapolite and zeolite. Phlogopite-melilite rocks form streaks and patches within the main rock and there are some ultramafic nodules. Petrography, rock analyses and experimental work are described by Bowen (1922).

References: 
BOWEN, N.L. 1922. Genetic features of alnoitic rocks at Isle Cadieux, Quebec. American Journal of Science, 3: 1-34. GOLD, D.P. 1972. The Monteregian Hills: ultra-alkaline rocks and the Oka carbonatite complex. 24th International Geological Congress, Excursion Guide, B-11: 1-47
Fig. 61 Distribution of alkaline rocks in the area of Montreal.
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith