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Ross Mine (Highland lode; John Ross Mine), Berne, Custer District, Custer Co., South Dakota, USA

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Ref.: Rocks & Min.: 60: 113; Rocks & Min.: 75(3): 156-169; Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur. Mines Info. Circ. 8298: 32 (Table A-1).

A pegmatite mine located in the NE¼ sec. 30, T.3S., R.4E., near Berne, near Custer. A mine on the "Highland lode."

Mineralization is an oval, zoned pegmatite body concordant in quartz-mica schist.

Workings include a large open pit, an incline with raise, a tunnel, and small pits.





 Map Reference: 43°46'0"N , 103°40'41"W

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Group 1 - Elements
  		• Bismuth1.CA.05
    Bi
    Group 2 - Sulphides and Sulfosalts
  		• Arsenopyrite2.EB.20
    FeAsS - (Fe
     
    0.90
    		Co
     
    0.10
    		)AsS
  		• Löllingite2.EB.15a
    FeAs
     
    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
  		• Cassiterite4.DB.05
    SnO
     
    2
  		• Quartz4.DA.05
    SiO
     
    2
  		• Uraninite4.DL.05
    UO
     
    2
    Group 8 - Phosphates, Arsenates and Vanadates
  		• Alluaudite8.AC.10
    (Na,Ca)Mn
    2+
     
    		(Fe
    3+
     
    		,Mn
    2+
     
    		,Fe
    2+
     
    		,Mg)
     
    2
    		(PO
     
    4
    		)
     
    3
  		• Apatite-(CaF)8.BN.05
    Ca
     
    5
    		[F|(PO
     
    4
    		)
     
    3
    		]
  		• Autunite8.EB.05
    Ca(UO
     
    2
    		)
     
    2
    		(PO
     
    4
    		)
     
    2
    		·11H
     
    2
    		O
  		• Graftonite8.AB.20
    (Fe
    2+
     
    		,Mn
    2+
     
    		,Ca)
     
    3
    		[PO
     
    4
    		]
     
    2
  		• Hureaulite8.CB.10
    (Mn,Fe)
     
    5
    		(PO
     
    3
    		OH)
     
    2
    		(PO
     
    4
    		)
     
    2
    		·4H
     
    2
    		O
  		• Lithiophilite8.AB.10
    LiMn
    2+
     
    		[PO
     
    4
    		]
  		• Montebrasite8.BB.05
    LiAl[(OH,F)|PO
     
    4
    		]
  		• Phosphosiderite8.CD.05
    FePO
     
    4
    		·2H
     
    2
    		O
  		• Purpurite8.AB.10
    (Mn
    3+
     
    		,Fe
    3+
     
    		)[PO
     
    4
    		]
  		• Sicklerite8.AB.10
    (LiMn
    2+
     
    		,Fe
    3+
     
    		)[PO
     
    4
    		]
  		• Torbernite8.EB.05
    Cu(UO
     
    2
    		)
     
    2
    		(PO
     
    4
    		)
     
    2
    		·12H
     
    2
    		O
  		• Triphylite8.AB.10
    LiFe
    2+
     
    		[PO
     
    4
    		]
  		• Triploidite8.BB.15
    (Mn
    2+
     
    		,Fe
    2+
     
    		)
     
    2
    		[OH|PO
     
    4
    		]
  		• Vivianite8.CE.40
    Fe
    2+
    3
    		(PO
     
    4
    		)
     
    2
    		·8H
     
    2
    		O
    Group 9 - Silicates
  		• Albite9.FA.35
    Na[AlSi
     
    3
    		O
     
    8
    		]
  		• Beryl9.CJ.05
    Be
     
    3
    		Al
     
    2
    		Si
     
    6
    		O
     
    18
  		• Microcline9.FA.30
    K[AlSi
     
    3
    		O
     
    8
    		]
  		• Muscovite9.EC.15
    KAl
     
    2
    		[(OH)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
  		• Schorl9.CK.05
    [Na][Fe
    2+
    3
    		][Al
     
    6
    		][(OH)
     
    3
    		|OH|(BO
     
    3
    		)
     
    3
    		|Si
     
    6
    		O
     
    18
    		]
  		• Spessartine9.AD.25
    Mn
    2+
    3
    		Al
     
    2
    		[SiO
     
    4
    		]
     
    3
  		• Uranophane9.AK.15
    Ca(UO
     
    2
    		)
     
    2
    		[HSiO
     
    4
    		]
     
    2
    		 · 5H
     
    2
    		O
  		• Zircon9.AD.30
    Zr[SiO
     
    4
    		]
    Unclassified Minerals
  		• 'Allanite'-
  		• 'Columbite-Tantalite'-
  		• 'Davidite'-
  		• 'Garnet Group'-
    X
     
    3
    		Z
     
    2
    		(TO
     
    4
    		)
     
    3
    		 (X = Ca, Fe, etc·, Z = Al, Cr, etc·, T = Si, As, V)
  		• 'Gummite'-


    35 entries listed. 30 valid minerals.

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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Jobs in South Dakota, 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 03:52:25