Regional Report: Oka complex, Oka, Deux-Montagnes RCM, Laurentides, Québec, Canada

Formerly: Oka, Oka complex, Deux-Montagnes Co., Québec, Canada Carbonatite complex. The Oka complex is an elongated oval, double-ring structure 8 km long and 2-3 km wide, trending NW-SE. It is one of the larger intrusions (approx. age 117-120 Ma) of the Monteregian alkaline province which includes such well known intrusions as Mont Saint-Hilaire. An oval-shaped carbonatite core is enclosed by ring-dykes of ultramafic rocks. It intrudes Precambrian rocks of the Grenville structural province. The complex was intensely explored in the 1950s and significant deposits of niobium were found. There are a number of individual localities within the complex, which were explored by a number of mining interests, but only one mine, the St. Lawrence Columbium mine, has gone into production.

For full locality listing click here. Alternatively: Click here for heirarchical list of localities in Oka complex, Oka, Deux-Montagnes RCM, Laurentides, Québec, Canada

Aegirine - 6, 8, 7

Åkermanite - 7

'Al-pyroxene' - 6

Albite - 6

Analcime - 6

Ancylite-(Ce) - 6

Andradite - 7

'Apatite' - 6, 1

Apatite-(CaF) - 8, 7, 5, 4

Arfvedsonite - 6

Augite - 6, 7, 4

Baryte - 8

Betafite - 8, 7

Biotite - 6, 8, 7, 5, 4

Britholite-(Ce) - 6, 5

Calcite - 6, 8, 7, 4, 1

Cancrinite - 6

Cebollite - 6

Ceriopyrochlore-(Ce) - 8, 7

Chalcopyrite - 6

Diopside - 6

Dolomite - 6

Fluorite - 6

Forsterite - 6, 7

Galena - 6

Grossular - 6

Haüyne - 6

Hematite - 6

Ilmenite - 6

Jarosite - 6

Kaolinite - 6

Kimzeyite - 6

Latrappite - 6, 8, 7, 2, 1

Maghemite - 6

Magnesite - 6

Magnetite - 6, 8, 7, 5, 4

Melilite - 6, 7, 4

Microcline - 6, 5

Monazite-(Ce) - 6

Monticellite - 6, 8, 7, 4

Natrolite - 6

Nepheline - 6, 4

'Niobian Perovskite' - 8

Niocalite - 6, 7, 2, 1

Parisite-(Ce) - 6

Periclase - 6

Perovskite - 6, 7, 4, 2, 1

Phlogopite - 6

Pyrite - 6, 8, 7

Pyrochlore - 6, 8, 7, 5

'Pyroxene Group' - 6

Pyrrhotite - 6

Quartz - 6, 5

Richterite - 6, 8

Siderite - 6

'Smectite Group' - 6

Sphalerite - 6

Strontianite - 6

Synchysite-(Ce) - 6

Thomsonite-Ca - 6

Titanite - 6

Tremolite - 6

Uranpyrochlore - 8, 7

Vesuvianite - 6

Wairakite - 6

Wöhlerite - 6

Wollastonite - 6

67 minerals listed.

Locality Key

1	Bond Zone, Columbium Mining Products, Oka complex, Oka, Deux-Montagnes RCM, Laurentides, Québec, Canada
2	Bond Zone, Quebec Columbium Ltd. Property, Oka complex, Oka, Deux-Montagnes RCM, Laurentides, Québec, Canada
3	Columbium Mining Products, Oka complex, Oka, Deux-Montagnes RCM, Laurentides, Québec, Canada
4	Husereau Hill (Husereau farm), Oka complex, Oka, Deux-Montagnes RCM, Laurentides, Québec, Canada

5	Manny zone (Dufresne property), Oka complex, Oka, Deux-Montagnes RCM, Laurentides, Québec, Canada
6	Oka complex, Oka, Deux-Montagnes RCM, Laurentides, Québec, Canada
7	Quebec Columbium Ltd. Property, Oka complex, Oka, Deux-Montagnes RCM, Laurentides, Québec, Canada
8	St Lawrence Columbium Mine, Oka complex, Oka, Deux-Montagnes RCM, Laurentides, Québec, Canada

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database!