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Gordon Butte, Meagher Co., Montana, USA

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Nepheline-syenite pegmatite dikes cutting malignites and nepheline microsyenites.
Located in the Crazy Mountains.



References:
-
http://www.cseg.ca/conferences/2000/2000abstracts/376.PDF
- Chakhmouradian, A. R. & Mitchell, R. H. (2002): The mineralogy of Ba- and Zr-rich alkaline pegmatites from Gordon Butte, Crazy Mountains (Montana, USA): comparisons between potassic and sodic agpaitic pegmatites. Contributions to Mineralogy and Petrology 143, 93-114.
- Chakhmouradian A.R. & Zaitsev A.N. (2002) Calcite-amphibole-clinopyroxene rock from the Afrikanda complex, Kola Peninsula, Russia: Mineralogy and a possible link to carbonatites. III. Silicate minerals. Can. Mineral., 40, 1347-1374.




Group 2 - Sulphides and Sulfosalts
  		• Chalcopyrite2.CB.10a
    CuFeS
     
    2
  		• Pyrite2.EB.05a
    FeS
     
    2
  		• Pyrrhotite2.CC.10
    Fe
     
    7
    		S
     
    8
    		, (-4M), also given as Fe
     
    1-x
    		S (x = 0 - 0.2)
    Group 4 - Oxides and Hydroxides
  		• Cafetite ?4.FL.75
    (Ca,Mg)(Fe,Al)
     
    2
    		Ti
     
    4
    		O
     
    12
    		·4H
     
    2
    		O
  		• Henrymeyerite4.DK.05
    BaFe
    2+
     
    		Ti
     
    7
    		O
     
    16
  		• Kassite ?4.DH.10
    CaTi
     
    2
    		O
     
    4
    		(OH)
     
    2
  		• Loparite-(Ce)4.CC.35
    (Na,Ce,Ca,Sr,Th)(Ti,Nb,Fe)O
     
    3
  		• Magnetite4.BB.05
    Fe
    2+
     
    		Fe
    3+
    2
    		O
     
    4
      var: Titaniferous Magnetite4.BB.05
    Fe
    2+
     
    		(Fe
    3+
     
    		,Ti)
     
    2
    		O
     
    4
  		• Pyrophanite4.CB.05
    Mn
    2+
     
    		TiO
     
    3
    Group 5 - Nitrates and Carbonates
  		• Ancylite-(Ce)5.DC.05
    SrCe[OH|(CO
     
    3
    		)
     
    2
    		] · H
     
    2
    		O
  		• Bastnäsite-(Ce)5.BD.20a
    (Ce,La)[F|CO
     
    3
    		]
  		• Calcioancylite-(Ce)5.DC.05
    (Ca,Sr)Ce(CO
     
    3
    		)
     
    2
    		OH·H
     
    2
    		O
  		• Calcite5.AB.05
    CaCO
     
    3
    Group 7 - Sulphates, Chromates, Molybdates and Tungstates
  		• Baryte7.AD.35
    BaSO
     
    4
    Group 8 - Phosphates, Arsenates and Vanadates
  		• Apatite-(CaF)8.BN.05
    Ca
     
    5
    		[F|(PO
     
    4
    		)
     
    3
    		]
  		• Belovite-(Ce)8.BN.05
    NaSr
     
    3
    		(Ce,La)[(F,OH)|(PO
     
    4
    		)
     
    3
    		]
    Group 9 - Silicates
  		• Aegirine9.DA.25
    NaFe
    3+
     
    		[Si
     
    2
    		O
     
    6
    		]
  		• Aegirine-augite9.DA.20
    (Na,Ca)(Fe
    3+
     
    		,Fe
    2+
     
    		,Mg,Al)Si
     
    2
    		O
     
    6
  		• Augite9.DA.15
    (Ca,Na)(Mg,Fe
    2+
     
    		,Al,Fe
    3+
     
    		,Ti)[(Si,Al)
     
    2
    		O
     
    6
    		]
  		• Baotite9.CE.15
    Ba
     
    4
    		(Ti,Nb)
     
    8
    		Si
     
    4
    		O
     
    28
    		Cl
  		• Barytolamprophyllite9.BE.25
    (Ba,Na)
     
    2
    		(Na,Ti,Fe
    3+
     
    		)
     
    4
    		Ti
     
    2
    		[O|(OH,F)|Si
     
    2
    		O
     
    7
    		]
     
    2
  		• Benitoite9.CA.05
    BaTi[Si
     
    3
    		O
     
    9
    		]
  		• Biotite9..
  		• Calciocatapleiite9.CA.15
    CaZrSi
     
    3
    		O
     
    9
    		·2H
     
    2
    		O
  		• Catapleiite9.CA.15
    Na
     
    2
    		Zr[Si
     
    3
    		O
     
    9
    		]·2H
     
    2
    		O
  		• Chamosite9.EC.55
    (Fe
    2+
     
    		,Mg)
     
    5
    		Al[(OH)
     
    8
    		|AlSi
     
    3
    		O
     
    10
    		]
  		• Dalyite9.EA.25
    K
     
    2
    		ZrSi
     
    6
    		O
     
    15
  		• Diopside9.DA.15
    CaMg[Si
     
    2
    		O
     
    6
    		]
  		• Eudialyte9.CO.10
    Na
     
    15
    		Ca
     
    6
    		(Fe
    2+
     
    		,Mn
    2+
     
    		)
     
    3
    		Zr
     
    3
    		[Si
     
    25
    		O
     
    73
    		](O,OH,H
     
    2
    		O)
     
    3
    		(OH,Cl)
     
    2
  		• Giuseppettite ?9.FB.05
    (Na,K,Ca)
     
    7-8
    		[(SO
     
    4
    		,Cl)
     
    1-2
    		|Al
     
    6
    		Si
     
    6
    		O
     
    24
    		]
  		• Hyalophane9.FA.30
    (K,Ba)[Al(Si,Al)Si
     
    2
    		O
     
    8
    		]
  		• Lamprophyllite9.BE.25
    (Sr,K,Ba)
     
    2
    		(Na,Ti,Mn
    2+
     
    		,Fe
    3+
     
    		)
     
    4
    		Ti
     
    2
    		[O|(O,OH,F)|Si
     
    2
    		O
     
    7
    		]
     
    2
  		• Magnesio-arfvedsonite9.DE.25
    [Na][Na
     
    2
    		][Mg
     
    4
    		Fe
    3+
     
    		][(OH)
     
    2
    		|Si
     
    8
    		O
     
    22
    		]
  		• Manganoneptunite9.EH.05
    Na
     
    2
    		KLi(Mn
    2+
     
    		,Fe
    2+
     
    		)
     
    2
    		Ti
     
    2
    		[Si
     
    8
    		O
     
    24
    		]
  		• Microcline9.FA.30
    K[AlSi
     
    3
    		O
     
    8
    		]
  		• Muscovite9.EC.15
    KAl
     
    2
    		[(OH)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
  		• Natrolite9.GA.05
    Na
     
    2
    		[Al
     
    2
    		Si
     
    3
    		O
     
    10
    		] · 2H
     
    2
    		O
  		• Nepheline9.FA.05
    (Na,K)[AlSiO
     
    4
    		]
  		• Neptunite9.EH.05
    Na
     
    2
    		KLi(Fe
    2+
     
    		,Mn
    2+
     
    		)
     
    2
    		Ti
     
    2
    		[Si
     
    8
    		O
     
    24
    		]
  		• Phillipsite-Ca9.GC.10
    (Ca
     
    0.5
    		,K,Na,Ba
     
    0.5
    		)
     
    4-7
    		[Al
     
    4-7
    		Si
     
    12-9
    		O
     
    32
    .
     
    		 12H2O
  		• 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
    		]
  		• Rinkite9..20
    Na(Na,Ca)
     
    2
    		(Ca,Ce)
     
    4
    		Ti[F
     
    2
    		|(O,F)
     
    2
    		|(Si
     
    2
    		O
     
    7
    		)
     
    2
    		]
  		• Sanidine9.FA.30
    K[AlSi
     
    3
    		O
     
    8
    		]
  		• Thomsonite-Ca9.GA.10
    NaCa
     
    2
    		[Al
     
    5
    		Si
     
    5
    		O
     
    20
    		] · 6H
     
    2
    		O
  		• Thorite9.AD.30
    (Th,U)[SiO
     
    4
    		]
  		• Titanite9.AG.15
    CaTi[O|SiO
     
    4
    		]
  		• Wadeite9.CA.10
    K
     
    2
    		Zr[Si
     
    3
    		O
     
    9
    		]
  		• Zircon9.AD.30
    Zr[SiO
     
    4
    		]
    Unclassified Minerals
  		• 'Ancylite'-
  		• 'Bastnäsite'-
  		• 'Calcioancylite'-
  		• 'K Feldspar'-
  		• 'Olivine'-
    (Mg,Fe
    2+
     
    		)
     
    2
    		[SiO
     
    4
    		]
  		• 'Parisite'-
  		• 'Zeolite Group'-


    57 entries listed. 47 valid minerals.

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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Jobs in Montana, USA 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: 17th Nov 2009 14:26:26