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Oka complex, Oka, Deux-Montagnes RCM, Laurentides, Québec, Canada

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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.



References:
GOLD, D.P. (1963) The relationship between the limestones and the alkaline igneous rocks of Oka and St. Hilaire, Quebec. Ph.D. Thesis, McGill University, Montreal. 354 p.
GOLD, D.P. (1967) Alkaline ultrabasic rocks in the Montreal area, Quebec. In: Ultramafic and Related Rocks, edited by P.J. Wyllie, 288-302. Robert E. Krieger Publ.Co. 464 p.
GOLD, D.P. (1969) The Oka carbonatite and alkaline complex. Guidebook GAC/MAC Annual meeting 1969, 43-62.
SABINA, A.P. (1968), revised (1983) Rocks and Minerals for the collector. Kingston, Ontario to Lac St-Jean, Quebec. Geological Survey of Canada paper 67-51 (1968), Misc. Report No. 32 (1983), 46-49.
Mariano, A. N., 1985. The paragenesis of the Bond Zone of the Oka Carbonatite Complex, Oka, Quebec. Senior Thesis, Bucknell Univ., Lewisburg, Pennsylvania.
Mariano, A. N., Roeder, P. L., 1989. Wöhlerite: chemical composition, cathodoluminescence and environment of crystallization. Canadian Mineralogist, 27: 709-720.
Villeneuve, E.M. (1990) Kimzeyite from alnoites at Ile Bizard and Oka, Quebec. Abstracts with Program GAC-MC Annual Meeting, Vancouver.





Map Reference: 45°30'N , 74°3'W

This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Mineral list contains entries from the region specified including sub-localities

Group 2 - Sulphides and Sulfosalts
  		• Chalcopyrite2.CB.10a
    CuFeS
     
    2
  		• Galena2.CD.10
    PbS
  		• Pyrite2.EB.05a
    FeS
     
    2
  		• Pyrrhotite2.CC.10
    Fe
     
    7
    		S
     
    8
    		, (-4M), also given as Fe
     
    1-x
    		S (x = 0 - 0.2)
  		• Sphalerite2.CB.05a
    (Zn,Fe
    2+
     
    		)S
    Group 3 - Halides
  		• Fluorite3.AB.25
    CaF
     
    2
    Group 4 - Oxides and Hydroxides
  		• Betafite4.DH.15
    (Ca,U)
     
    2
    		(Ti,Nb)
     
    2
    		O
     
    6
    		(OH)
  		• Ceriopyrochlore-(Ce)4.DH.15
    (Ce,Ca,Y)
     
    2
    		(Nb,Ta)
     
    2
    		O
     
    6
    		(OH,F)
  		• Hematite4.CB.05
    Fe
     
    2
    		O
     
    3
  		• Ilmenite4.CB.05
    Fe
    2+
     
    		TiO
     
    3
  		• Latrappite (TL)4.CC.30
    (Ca,Na)(Nb,Ti,Fe)O
     
    3
  		• Maghemite4.BB.15
    Fe
     
    2
    		O
     
    3
  		• Magnetite4.BB.05
    Fe
    2+
     
    		Fe
    3+
    2
    		O
     
    4
  		• Periclase4.AB.25
    MgO
  		• Perovskite4.CC.30
    CaTiO
     
    3
  		• Pyrochlore4.DH.15
    (Ca,Na)
     
    2
    		Nb
     
    2
    		O
     
    6
    		(OH,F)
  		• Quartz4.DA.05
    SiO
     
    2
  		• Uranpyrochlore4.DH.15
    (U,Ca,Ce)
     
    2
    		(Nb,Ta)
     
    2
    		O
     
    6
    		(OH,F)
    Group 5 - Nitrates and Carbonates
  		• Ancylite-(Ce)5.DC.05
    SrCe[OH|(CO
     
    3
    		)
     
    2
    		] · H
     
    2
    		O
  		• Calcite5.AB.05
    CaCO
     
    3
  		• Dolomite5.AB.10
    CaMg(CO
     
    3
    		)
     
    2
  		• Magnesite5.AB.05
    MgCO
     
    3
  		• Parisite-(Ce)5.BD.20b
    Ca(Ce,La)
     
    2
    		[F
     
    2
    		|(CO
     
    3
    		)
     
    3
    		]
  		• Siderite5.AB.05
    FeCO
     
    3
  		• Strontianite5.AB.15
    SrCO
     
    3
  		• Synchysite-(Ce)5.BD.20c
    Ca(Ce,La)[F|(CO
     
    3
    		)
     
    2
    		]
    Group 7 - Sulphates, Chromates, Molybdates and Tungstates
  		• Baryte7.AD.35
    BaSO
     
    4
  		• Jarosite7.BC.10
    KFe
    3+
     
     
    3
    		[(OH)
     
    3
    		|SO
     
    4
    		]
     
    2
    Group 8 - Phosphates, Arsenates and Vanadates
  		• Apatite-(CaF)8.BN.05
    Ca
     
    5
    		[F|(PO
     
    4
    		)
     
    3
    		]
  		• Monazite-(Ce)8.AD.50
    (Ce,La,Nd,Th)PO
     
    4
    Group 9 - Silicates
  		• Aegirine9.DA.25
    NaFe
    3+
     
    		[Si
     
    2
    		O
     
    6
    		]
  		• Albite9.FA.35
    Na[AlSi
     
    3
    		O
     
    8
    		]
  		• Analcime9.GB.05
    Na
     
    2
    		[Al
     
    2
    		Si
     
    4
    		O
     
    12
    		] · 2H
     
    2
    		O
  		• Andradite9.AD.25
    Ca
     
    3
    		Fe
    3+
    2
    		[SiO
     
    4
    		]
     
    3
  		• Arfvedsonite9.DE.25
    [Na][Na
     
    2
    		][Fe
    2+
    4
    		Fe
    3+
     
    		][(OH)
     
    2
    		|Si
     
    8
    		O
     
    22
    		]
  		• Augite9.DA.15
    (Ca,Na)(Mg,Fe
    2+
     
    		,Al,Fe
    3+
     
    		,Ti)[(Si,Al)
     
    2
    		O
     
    6
    		]
  		• Biotite9..
  		• Britholite-(Ce)9.AH.25
    Ca
     
    2
    		(Ce,Ca)
     
    3
    		[(OH,F)|(SiO
     
    4
    		,PO
     
    4
    		)
     
    3
    		]
  		• Cancrinite9.FB.05
    Na
     
    6
    		Ca
     
    2
    		[(CO
     
    3
    		)
     
    2
    		|Al
     
    6
    		Si
     
    6
    		O
     
    24
    		] · 2H
     
    2
    		O
  		• Cebollite9.BB.10
    Ca
     
    5
    		Al
     
    2
    		Si
     
    3
    		O
     
    12
    		(OH)
     
    4
    		 or near
  		• Diopside9.DA.15
    CaMg[Si
     
    2
    		O
     
    6
    		]
  		• Forsterite9.AC.05
    Mg
     
    2
    		[SiO
     
    4
    		]
  		• Grossular9.AD.25
    Ca
     
    3
    		Al
     
    2
    		[SiO
     
    4
    		]
     
    3
  		• Haüyne9.FB.10
    (Na,Ca)
     
    4-8
    		[Al
     
    6
    		Si
     
    6
    		(O,S)
     
    24
    		](SO
     
    4
    		,Cl)
     
    1-2
  		• Kaolinite9.ED.05
    Al
     
    2
    		Si
     
    2
    		O
     
    5
    		(OH)
     
    4
  		• Kimzeyite9.AD.25
    Ca
     
    3
    		(Zr,Ti)
     
    2
    		[(Si,Al,Fe
    3+
     
    		)O
     
    4
    		]
     
    3
  		• Microcline9.FA.30
    K[AlSi
     
    3
    		O
     
    8
    		]
  		• Monticellite9.AC.10
    CaMg[SiO
     
    4
    		]
  		• Natrolite9.GA.05
    Na
     
    2
    		[Al
     
    2
    		Si
     
    3
    		O
     
    10
    		] · 2H
     
    2
    		O
  		• Nepheline9.FA.05
    (Na,K)[AlSiO
     
    4
    		]
  		• Niocalite (TL)9.BE.17
    (Ca,Nb)
     
    4
    		[(O,OH,F)
     
    2
    		|Si
     
    2
    		O
     
    7
    		]
  		• Phlogopite9.EC.20
    KMg
     
    3
    		[(OH,F)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
  		• Richterite9.DE.20
    Na[CaNa][Mg
     
    5
    		][(OH)
     
    2
    		|Si
     
    8
    		O
     
    22
    		]
  		• Thomsonite-Ca9.GA.10
    NaCa
     
    2
    		[Al
     
    5
    		Si
     
    5
    		O
     
    20
    		] · 6H
     
    2
    		O
  		• Titanite9.AG.15
    CaTi[O|SiO
     
    4
    		]
  		• Tremolite9.DE.10
    ☐[Ca
     
    2
    		][Mg
     
    5
    		][(OH)
     
    2
    		|Si
     
    8
    		O
     
    22
    		]
  		• Vesuvianite9.BG.35
    Ca
     
    10
    		(Mg,Fe)
     
    2
    		Al
     
    4
    		Si
     
    9
    		O
     
    34
    		(OH)
     
    4
  		• Wairakite9.GB.05
    Ca[Al
     
    2
    		Si
     
    4
    		O
     
    12
    		] · 2H
     
    2
    		O
  		• Wollastonite9.DG.05
    Ca[SiO
     
    3
    		]
  		• Wöhlerite9.BE.17
    NaCa
     
    2
    		(Zr,Nb)[(O,OH,F)
     
    2
    		|Si
     
    2
    		O
     
    7
    		]
  		• Åkermanite9.BB.10
    Ca
     
    2
    		Mg[Si
     
    2
    		O
     
    7
    		]
    Unclassified Minerals
  		• 'Apatite'-
  		• Melilite-
    (Ca,Na)
     
    2
    		(Al,Mg,Fe
    2+
     
    		)[(Al,Si)SiO
     
    7
    		]
  		• 'Niobian Perovskite'-
  		• 'Pyroxene Group'-
      'var: Al-pyroxene'-
  		• 'Smectite Group'-
    A
     
    0.3
    		D
     
    2-3
    		[T
     
    4
    		O
     
    10
    		]Z
     
    2
    		·nH
     
    2
    		O


    67 entries listed. 59 valid minerals.

    Localities in this Region:
    Canada
     
    • Québec
      • Laurentides
        • Deux-Montagnes RCM
          • Oka
            • Oka complex

    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!
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Jobs in Quebec, Canada Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 29th Nov 2009 16:48:33