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.
Location: