Alkaline Rocks and Carbonatites of the World

Setup during HiTech AlkCarb: an online database of alkaline rock and carbonatite occurrences

Ile Cadieux

stripes

Occurrence number: 
031-00-123
Country: 
Canada
Region: 
Montreal area
Location: 
Longitude: -74.05, Latitude: 45.4
Carbonatite: 
No

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.

Map: 
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