Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (2 online) Mindat Auctions

Minneapolis adit, J-M Reef (Howland Reef), Stillwater Complex, Stillwater Co., Montana, USA

StandardDetailedBy ChemistrySearch Google

References:
Barnes, S.J. and Naldrett, A.J. (1985) Geochemistry of the J-M (Howland) Reef of the Stillwater complex, Minneapolis Adit area. I. Sulfide chemistry and sulfide-olivine equilibrium. Economic Geology: 80: 627-645.
Econ Geol (1986) 81:1187-1195




Group 1 - Elements
  		• Atokite1.AG.10
    (Pd,Pt)
     
    3
    		Sn
  		• Gold
    var: Palladian Gold    		1.AA.05
    (Au,Pd)
  		• Plumbopalladinite1.AG.25
    Pd
     
    3
    		Pb
     
    2
  		• Potarite1.AD.25
    PdHg
  		• Zvyagintsevite1.AG.10
    (Pd,Pt,Au)
     
    3
    		(Pb,Sn)
    Group 2 - Sulphides and Sulfosalts
  		• Arsenopalladinite2.AC.10c
    Pd
     
    8
    		(As,Sb)
     
    3
  		• Braggite2.CC.35a
    (Pt,Pd,Ni)S
  		• Chalcopyrite2.CB.10a
    CuFeS
     
    2
  		• Cooperite2.CC.35b
    (Pt,Pd,Ni)S
  		• Keithconnite2.BC.20
    Pd
     
    3-x
    		Te (x = 0.14 - 0.43)
  		• Moncheite2.EA.20
    (Pt,Pd)(Te,Bi)
     
    2
  		• Palarstanide2.AC.20b
    Pd
     
    8
    		(As,Sn)
     
    3
  		• Pentlandite2.BB.15
    (Fe,Ni)
     
    9
    		S
     
    8
  		• Pyrite2.EB.05a
    FeS
     
    2
  		• Pyrrhotite2.CC.10
    Fe
     
    7
    		S
     
    8
    		, (-4M), also given as Fe
     
    1-x
    		S (x = 0 - 0.2)
  		• Telluropalladinite2.BC.30
    Pd
     
    9
    		Te
     
    4
  		• Vysotskite2.CC.35a
    (Pd,Ni)S
    Group 4 - Oxides and Hydroxides
  		• Magnetite4.BB.05
    Fe
    2+
     
    		Fe
    3+
    2
    		O
     
    4
    Group 9 - Silicates
  		• Phlogopite9.EC.20
    KMg
     
    3
    		[(OH,F)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
  		• Talc9.EC.05
    Mg
     
    3
    		Si
     
    4
    		O
     
    10
    		(OH)
     
    2
  		• Tremolite9.DE.10
    ☐[Ca
     
    2
    		][Mg
     
    5
    		][(OH)
     
    2
    		|Si
     
    8
    		O
     
    22
    		]
    Unclassified Minerals
  		• 'Albite-Anorthite Series'-
  		• 'Apatite'-
  		• 'Chlorite Group'-
  		• 'Hornblende'-
  		• 'Olivine'-
    (Mg,Fe
    2+
     
    		)
     
    2
    		[SiO
     
    4
    		]
  		• 'Serpentine Group'-
    D
     
    2
    		[Si
     
    2
    		O
     
    5
    		](OH)4 + or - nH
     
    2
    		O


    27 entries listed. 21 valid minerals.

    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!
    This page is currently not sponsored. Click here to find out how you can sponsor this page.

    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    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: 28th Nov 2009 13:26:53