Alkaline Rocks and Carbonatites of the World

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Occurrence number: 
Montreal area
Longitude: -74, Latitude: 45.58

The Brilund pipe, which underlies a low, wooded hill, is about 150x100 m and cuts Potsdam sandstone. It has been extensively drilled (Gold and Marchand, 1969, Fig. 5.). The rock consists of poikilitic monticellite, with variable amounts of phlogopite, forsterite, melilite and calcite with accesory magnetite, garnet, apatite and perovskite.

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