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Keweenaw Co., Michigan, USA

StandardDetailedBy ChemistryMineral Photos (366)Site Photos (53)Search GoogleMineral Report for Region

Click here to read more about the early days of the Keweenaw Peninsula/County explorations.



References:
Rosemeyer, T. (2009) Copper-bearing fissure veins, Keweenaw County, Michigan, Lake Superior Native Copper District. Rocks & Minerals 84:298-323.
Tschernich, R. (1992): Zeolites of the World, 115.




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

Group 1 - Elements
  		• Copper1.AA.05
    Cu
  		• Silver1.AA.05
    Ag
    Group 2 - Sulphides and Sulfosalts
  		• Acanthite2.BA.35
    Ag
     
    2
    		S
  		• Algodonite2.AA.10a
    (Cu
     
    1-x
    		As
     
    x
    		)
  		• Bornite2.BA.15
    Cu
     
    5
    		FeS
     
    4
  		• Chalcocite2.BA.05
    Cu
     
    2
    		S
  		• Chalcopyrite2.CB.10a
    CuFeS
     
    2
  		• Covellite2.CA.05a
    CuS
  		• Digenite2.BA.10
    Cu
     
    9
    		S
     
    5
  		• Djurleite2.BA.05
    Cu
     
    31
    		S
     
    16
  		• Domeykite2.AA.10b
    Cu
     
    3
    		As
  		• Galena2.CD.10
    PbS
  		• Koutekite2.AA.10d
    Cu
     
    5
    		As
     
    2
  		• Maucherite2.AB.15
    Ni
     
    11
    		As
     
    8
  		• Nickeline2.CC.05
    NiAs
  		• Nickelskutterudite2.EC.05
    NiAs
     
    2-3
      var: Chloanthite2.EC.05
    NiAs
     
    2
    		 - excess As up to As
     
    2.5
  		• Pararammelsbergite2.EB.10e
    NiAs
     
    2
  		• Paxite2.EB.15c
    CuAs
     
    2
  		• Pyrite2.EB.05a
    FeS
     
    2
  		• Rammelsbergite2.EB.15a
    NiAs
     
    2
  		• Skutterudite
    var: Smaltite    		2.EC.05
    (Co,Fe,Ni)As
     
    2
  		• Sphalerite2.CB.05a
    (Zn,Fe
    2+
     
    		)S
    Group 3 - Halides
  		• Atacamite3.DA.10a
    Cu
     
    2
    		[(OH)
     
    3
    		|Cl]
  		• Calumetite3.DA.40
    Cu(OH,Cl)
     
    2
    		 · 2H
     
    2
    		O
  		• Fluorite3.AB.25
    CaF
     
    2
  		• Paratacamite3.DA.10c
    Cu
     
    3
    		(Cu,Zn)[(OH)
     
    3
    		|Cl]
     
    2
    Group 4 - Oxides and Hydroxides
  		• Anatase4.DD.05
    TiO
     
    2
  		• Cuprite4.AA.10
    Cu
     
    2
    		O
  		• Goethite4.FD.10
    α-Fe
    3+
     
    		O(OH)
  		• Hematite4.CB.05
    Fe
     
    2
    		O
     
    3
      var: Martite4.CB.05
    Fe
     
    2
    		O
     
    3
  		• Hollandite4.DK.05
    Ba(Mn
    4+
     
    		,Mn
    2+
     
    		)
     
    8
    		O
     
    16
  		• Ilmenite4.CB.05
    Fe
    2+
     
    		TiO
     
    3
  		• Kamiokite4.CB.40
    Fe
     
    2
    		Mo
     
    3
    		O
     
    8
  		• Magnetite4.BB.05
    Fe
    2+
     
    		Fe
    3+
    2
    		O
     
    4
  		• Manganite4.FD.15
    Mn
    3+
     
    		O(OH)
  		• Pyrolusite4.DB.05
    MnO
     
    2
  		• Quartz4.DA.05
    SiO
     
    2
      var: Amethyst4.DA.05
    SiO
     
    2
      var: Jasper4.DA.05
    SiO
     
    2
      var: Milky Quartz4.DA.05
    SiO
     
    2
      var: Rock Crystal4.DA.05
    SiO
     
    2
      var: Smoky Quartz4.DA.05
    SiO
     
    2
  		• Tenorite4.AB.10
    CuO
    Group 5 - Nitrates and Carbonates
  		• Ankerite5.AB.10
    Ca(Fe
    2+
     
    		 ,Mg,Mn
    2+
     
    		)(CO
     
    3
    		)
     
    2
  		• Azurite5.BA.05
    Cu
     
    3
    		[OH|CO
     
    3
    		]
     
    2
  		• Calcite5.AB.05
    CaCO
     
    3
  		• Dolomite5.AB.10
    CaMg(CO
     
    3
    		)
     
    2
  		• Malachite5.BA.10
    Cu
     
    2
    		[(OH)
     
    2
    		|CO
     
    3
    		]
  		• Rhodochrosite ?5.AB.05
    MnCO
     
    3
    Group 6 - Borates
  		• Vonsenite6.AB.30
    Fe
    2+
    2
    		Fe
    3+
     
    		[O
     
    2
    		|BO
     
    3
    		]
    Group 7 - Sulphates, Chromates, Molybdates and Tungstates
  		• Anhydrite7.AD.30
    CaSO
     
    4
  		• Baryte7.AD.35
    BaSO
     
    4
  		• Brochantite7.BB.25
    Cu
     
    4
    		[(OH)
     
    6
    		|SO
     
    4
    		]
  		• Carbonatecyanotrichite7.DE.10
    Cu
     
    4
    		Al
     
    2
    		[(OH)
     
    12
    		|(CO
     
    3
    		,SO
     
    4
    		)] · 2H
     
    2
    		O
  		• Gypsum7.CD.40
    Ca[SO
     
    4
    		] · 2H
     
    2
    		O
  		• Langite7.DD.10
    Cu
     
    4
    		[(OH)
     
    6
    		|SO
     
    4
    		] · 2H
     
    2
    		O
  		• Posnjakite7.DD.10
    Cu
     
    4
    		[(OH)
     
    6
    		|SO
     
    4
    		] · H
     
    2
    		O
    Group 8 - Phosphates, Arsenates and Vanadates
  		• Annabergite8.CE.40
    Ni
     
    3
    		(AsO
     
    4
    		)
     
    2
    		·8H
     
    2
    		O
  		• Apatite-(CaF)8.BN.05
    Ca
     
    5
    		[F|(PO
     
    4
    		)
     
    3
    		]
  		• Conichalcite8.BH.35
    CaCu[OH|AsO
     
    4
    		]
  		• Erythrite8.CE.40
    Co
     
    3
    		(AsO
     
    4
    		)
     
    2
    		·8H
     
    2
    		O
  		• Guérinite8.CJ.75
    Ca
     
    5
    		[(HAsO
     
    4
    		)
     
    2
    		|(AsO
     
    4
    		)
     
    2
    		] · 9H
     
    2
    		O
  		• Lavendulan8.DG.05
    NaCaCu
     
    5
    		[Cl|(AsO
     
    4
    		)
     
    4
    		] · 5H
     
    2
    		O
  		• Olivenite8.BB.30
    Cu
     
    2
    		[OH|AsO
     
    4
    		]
  		• Pharmacolite8.CJ.50
    CaHAsO
     
    4
    		·2H
     
    2
    		O
  		• Picropharmacolite8.CH.15
    Ca
     
    4
    		Mg[(HAsO
     
    4
    		)
     
    2
    		|(AsO
     
    4
    		)
     
    2
    		] · 11H
     
    2
    		O
  		• Rauenthalite8.CJ.40
    Ca
     
    3
    		[AsO
     
    4
    		]
     
    2
    		 · 10H
     
    2
    		O
  		• Sainfeldite8.CB.10
    CaCa
     
    2
    		Ca
     
    2
    		(AsO
     
    3
    		OH)
     
    2
    		(AsO
     
    4
    		)
     
    2
    		·4H
     
    2
    		O
  		• Tangeite8.BH.35
    CaCu[OH|VO
     
    4
    		]
  		• Tyrolite8.DM.10
    Ca
     
    2
    		Cu
     
    9
    		[(OH)
     
    4
    		|(H
     
    2
    		O)
     
    11
    		|CO
     
    3
    		|(AsO
     
    4
    		)
     
    4
    		] · 0-1H
     
    2
    		O
  		• Veszelyite8.DA.30
    (Cu,Zn)
     
    2
    		Zn(PO
     
    4
    		)
     
    2
    		·2H
     
    2
    		O
  		• Vladimirite8.CJ.25
    Ca
     
    5
    		[(HAsO
     
    4
    		)
     
    2
    		|(AsO
     
    4
    		)
     
    2
    		] · 5H
     
    2
    		O
    Group 9 - Silicates
  		• 'Adularia'9.FA.30
    KAlSi
     
    3
    		O
     
    8
  		• Albite9.FA.35
    Na[AlSi
     
    3
    		O
     
    8
    		]
      var: Oligoclase9.FA.35
    (Na,Ca)[Al(Si,Al)Si
     
    2
    		O
     
    8
    		]
      var: Peristerite9.FA.35
    Na[AlSi
     
    3
    		O
     
    8
    		]
  		• Almandine9.AD.25
    Fe
    2+
    3
    		Al
     
    2
    		[SiO
     
    4
    		]
     
    3
  		• Aluminoceladonite9.EC.15
    K(Mg,Fe
    2+
     
    		)(Al,Fe
    3+
     
    		)[(OH)
     
    2
    		|Si
     
    4
    		O
     
    10
    		]
  		• 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
  		• Anorthite
    var: Labradorite    		9.FA.35
    (Ca,Na)[Al(Al,Si)Si
     
    2
    		O
     
    8
    		]
  		• Apophyllite-(KF)9.EA.15
    KCa
     
    4
    		[(F,OH)|Si
     
    8
    		O
     
    20
    		] · 8H
     
    2
    		O
  		• Augite9.DA.15
    (Ca,Na)(Mg,Fe
    2+
     
    		,Al,Fe
    3+
     
    		,Ti)[(Si,Al)
     
    2
    		O
     
    6
    		]
  		• Babingtonite9.DK.05
    Ca
     
    2
    		(Fe,Mn)FeSi
     
    5
    		O
     
    14
    		(OH)
  		• Biotite9..
  		• Braunite9.AG.05
    Mn
    2+
     
    		Mn
    3+
    6
    		[O
     
    8
    		|SiO
     
    4
    		]
  		• Celadonite9.EC.15
    K(Mg,Fe
    2+
     
    		)(Fe
    3+
     
    		,Al)[(OH)
     
    2
    		|Si
     
    4
    		O
     
    10
    		]
  		• Chamosite9.EC.55
    (Fe
    2+
     
    		,Mg)
     
    5
    		Al[(OH)
     
    8
    		|AlSi
     
    3
    		O
     
    10
    		]
  		• Chloritoid9.AF.85
    (Fe
    2+
     
    		,Mg,Mn
    2+
     
    		)Al
     
    2
    		[O|(OH)
     
    2
    		|SiO
     
    4
    		]
  		• Chrysocolla9.ED.20
    (Cu,Al)
     
    2
    		H
     
    2
    		Si
     
    2
    		O
     
    5
    		(OH)
     
    4
    		·nH
     
    2
    		O
  		• Clinochlore9.EC.55
    (Mg,Fe
    2+
     
    		)
     
    5
    		Al[(OH)
     
    8
    		|AlSi
     
    3
    		O
     
    10
    		]
      var: Delessite9.EC.55
    (Mg,Fe,Fe,Al)(Si,Al)
     
    4
    		O
     
    10
    		(O,OH)
     
    8
  		• Clinozoisite9.BG.05
    {Ca
     
    2
    		}{Al
     
    3
    		}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
  		• Corrensite9.EC.60
    (Mg,Fe)
     
    9
    		(Si,Al)
     
    8
    		O
     
    20
    		(OH)
     
    10
    		·nH
     
    2
    		O
  		• Datolite9.AJ.20
    CaB[OH|SiO
     
    4
    		]
  		• Diopside9.DA.15
    CaMg[Si
     
    2
    		O
     
    6
    		]
  		• Epidote9.BG.05
    {Ca
     
    2
    		}{Al
     
    2
    		Fe
    3+
     
    		}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
  		• Forsterite9.AC.05
    Mg
     
    2
    		[SiO
     
    4
    		]
  		• Kaolinite9.ED.05
    Al
     
    2
    		Si
     
    2
    		O
     
    5
    		(OH)
     
    4
  		• Kinoite9.BH.10
    Ca
     
    2
    		Cu
     
    2
    		(H
     
    2
    		O)
     
    2
    		[Si
     
    3
    		O
     
    10
    		]
  		• Laumontite9.GB.10
    CaAl
     
    2
    		Si
     
    4
    		O
     
    12
    		·4H
     
    2
    		O
  		• Macfallite (TL)9.BG.15
    Ca
     
    2
    		(Mn
    3+
     
    		,Al)
     
    3
    		[(OH)
     
    3
    		|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
  		• Mesolite9.GA.05
    Na
     
    2
    		Ca
     
    2
    		[Al
     
    2
    		Si
     
    3
    		O
     
    10
    		]
     
    3
    		 · 8H
     
    2
    		O
  		• 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
  		• Neltnerite9.AG.05
    CaMn
    3+
    6
    		[O
     
    8
    		|SiO
     
    4
    		]
  		• Orientite9.BJ.05
    Ca
     
    2
    		MnMn
     
    2
    		Si
     
    3
    		O
     
    10
    		(OH)
     
    4
  		• Orthoclase9.FA.30
    K[AlSi
     
    3
    		O
     
    8
    		]
  		• Pigeonite9.DA.10
    (Mg,Fe
    2+
     
    		,Ca)(Mg,Fe
    2+
     
    		)[Si
     
    2
    		O
     
    6
    		]
  		• Prehnite9.DP.20
    Ca
     
    2
    		Al
     
    2
    		Si
     
    3
    		O
     
    12
    		(OH)
  		• Pumpellyite-(Fe2+)9.BG.20
    Ca
     
    2
    		Fe
    2+
     
    		Al
     
    2
    		[(OH)
     
    2
    		|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		] · H
     
    2
    		O
  		• Pumpellyite-(Mg) (TL)9.BG.20
    Ca
     
    2
    		MgAl
     
    2
    		[(OH)
     
    2
    		|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		] · H
     
    2
    		O
      var: Chlorastrolite9.BG.20
    Ca
     
    2
    		MgAl
     
    2
    		[(OH)
     
    2
    		|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		] · H
     
    2
    		O
  		• Saponite9.EC.45
    Ca
     
    0.25
    		(Mg,Fe)
     
    3
    		(Si,Al)
     
    4
    		O
     
    10
    		(OH)
     
    2
    		·nH
     
    2
    		O
  		• Stilbite-Ca9.GE.10
    NaCa
     
    4
    		[Al
     
    9
    		Si
     
    27
    		O
     
    72
    		] · nH
     
    2
    		O
  		• Thomsonite-Ca9.GA.10
    NaCa
     
    2
    		[Al
     
    5
    		Si
     
    5
    		O
     
    20
    		] · 6H
     
    2
    		O
  		• Vermiculite9.EC.50
    (Mg,Fe,Al)
     
    3
    		(Al,Si)
     
    4
    		O
     
    10
    		(OH)
     
    2
    		·4H
     
    2
    		O
  		• Wairakite9.GB.05
    Ca[Al
     
    2
    		Si
     
    4
    		O
     
    12
    		] · 2H
     
    2
    		O
  		• Wollastonite9.DG.05
    Ca[SiO
     
    3
    		]
  		• Xonotlite9.DG.35
    Ca
     
    6
    		Si
     
    6
    		O
     
    17
    		(OH)
     
    2
  		• Zircon9.AD.30
    Zr[SiO
     
    4
    		]
    Group 10 - Organic Compounds
  		• Humboldtine10.AB.05
    Fe[C
     
    2
    		O
     
    4
    		] · 2H
     
    2
    		O
  		• Moolooite10.AB.15
    Cu[C
     
    2
    		O
     
    4
    		]·0.4H
     
    2
    		O
  		• Whewellite10.AB.45
    Ca[C
     
    2
    		O
     
    4
    		] · H
     
    2
    		O
    Unclassified Minerals
  		• 'Apophyllite'-
  		• 'Chabazite'-
  		• 'Chalcedony
    var: Agate'    		-
    SiO
     
    2
      'var: Carnelian'-
      'var: Lake Superior Agate'-
    SiO
     
    2
  		• 'Chlorite Group'-
  		• 'Faujasite' ?-
  		• 'Halfbreed'-
  		• 'Heulandite'-
  		• 'Mohawkite'-
  		• 'Olivine'-
    (Mg,Fe
    2+
     
    		)
     
    2
    		[SiO
     
    4
    		]
  		• 'Pumpellyite'-
  		• 'Sericite'-
  		• 'Stilbite'-
  		• 'Thomsonite'-


    142 entries listed. 125 valid minerals.

    Localities in this Region:
    USA
     
    • Michigan
      • Keweenaw Co.
        • Bete Gries
        • Gay
        • Kearsarge
        • Superior

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