Alkaline Rocks and Carbonatites of the World

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Ile Cadieux


Occurrence number: 
Montreal area
Longitude: -74.05, Latitude: 45.4

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).

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. 1_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