Alkaline Rocks and Carbonatites of the World

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Ste-Anne De Bellvue

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Occurrence number: 
031-00-124
Country: 
Canada
Region: 
Montreal area
Location: 
Longitude: -73.08, Latitude: 45.03

An alnoitic dyke in the river south of Ste-Anne de Bellvue, at the extreme southwest end of the Island of Montreal, is no longer exposed. The rock varies from highly porphyritic varieties with phenocrysts up to 5 cm in diameter of phlogopite, olivine and pyroxene to equigranular varieties of the same minerals together with melilite, magnetite, pyrrhotine, apatite and perovskite; Adams (1896, p. 271) thought that nepheline may also be present.

References: 
ADAMS, F.D. 1892. On a melilite-bearing rock (alnoite) from Ste. Anne de Bellevue near Montreal, Canada. American Journal of Science, 43: 269-79. ADAMS, F.D. 1896. Report on the geology of a portion of the Laurentian area lying in the north of the Island of Montreal. Annual Report, Geological Survey of Canada, 8, part J: 1-160. GOLD, D.P. and MARCHAND, M. 1969. The diatreme breccia pipes and dykes, and the related alnoite, kimberlite and carbonatite intrusions occurring in the Montreal and Oka areas, P.Q. Part 1: The alnoite, kimberlite, and diatreme breccia pipes and dykes. In Geology of the Monteregian Hills (Ed. G. Pouliot). Geological Association of Canada - Mineralogical Association of Canada, Guidebook: 5-42
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