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Sjö Mine, Grythyttan, Hällefors, Västmanland, Sweden

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(Sjögruvan, Grythyttan, Hällefors, Västmanland, Sverige)

Sjögruvan, which translates in English to the "Lake Mine" has been mined on a minor deposit. The paragenesis is of the Långban type. Operations began as early as 1643, and it was mentioned in official records in 1673 and 1698. It was stated in 1697 that the mine was 4.5 meters deep, "but the mineralisation is flooded by the lake so it is not possible to use." The mine was mentioned once more during the 18th century, but was abandoned completely until it was reopened by L. J. Igelström in the 1860´s, who operated it mainly due to the rare minerals he discovered there.

During the years 1886-1889, the mine produced 303,000 kg of manganese ore and 85,000 kg of iron ore. The mine was 16 meters deep when it was abandoned. The ores where found in a dolomitic carbonate rock, the iron ore was mainly hematite, and the manganese ore was composed of hausmannite, braunite and rhodonite.



References:
- Sundius, N (1923) Grythyttefältets geologi. SGU ser C 312.

- Tegengren, F.R. (1924) Sveriges ädlare malmer och bergverk. SGU ser Ca 17.

- Geijer, P. and Magnusson, N.H. (1944) De mellansvenska järnmalmernas geologi. SGU ser Ca 35.

- Palache, C., Berman, H. & Frondel, C. (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, 7th. edition, Volume I: 640.

- Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 844, 845, 857, 1025, 1030, 1041.

- Moore, P.B. (1970) Mineralogy and Chemistry of Långban-type Deposits in Bergslagen, Sweden. Mineralogical Record: 1: 4.

- Moore, P. B. (1972) Contributions to the mineralogy of Sweden. III. On Igelström's manganese arsenates and antimonates from the Sjö Mine, Grythyttan, Örebro County, Sweden. GFF 94 (3), 423-434.

- Wilke, H-J (1976) Mineralfundstellen in Skandinavien. München.

- Mineralium Deposita: 36(7): 641-657.

- http://www.geonord.org/langban/sjo_eng.htm





 Map Reference: 59°50'N , 15°32'E

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:
  		•  Allactite
    Mn
    2+
    7
    		(AsO
     
    4
    		)
     
    2
    		(OH)
     
    8
    Reference: [No reference listed]
  		•  Andradite
    Ca
     
    3
    		Fe
    3+
    2
    		[SiO
     
    4
    		]
     
    3
    Reference: []
  		•  Arseniopleite (TL)
    NaCaMn
    2+
     
    		(Mn
    2+
     
    		,Mg)
     
    2
    		(AsO
     
    4
    		)
     
    3
    Type Locality: Sjö Mine, Grythyttan, Hällefors, Västmanland, Sweden
    Reference: [Neues Jahrb. Min. (1888): 2, 117; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 844.]
    Site Photo
    Sjö Mine, Grythyttan, Hällefors, Västmanland, Sweden
    © Pavel M. Kartashov
  		•  Baryte
    BaSO
     
    4
    Reference: [Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 1030.]
  		•  Basiliite
    Reference: [Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 1025.]
  		•  Berzeliite
    NaCa
     
    2
    		(Mg,Mn
    2+
     
    		)
     
    2
    		[AsO
     
    4
    		]
     
    3
    Reference: [Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 683.]
  		•  Biotite
    var: Manganophyllite
    K(Mn,Mg,Al)
     
    2-3
    		(Al,Si)
     
    4
    		O
     
    10
    		(OH)
     
    2
    Reference: [No reference listed]
  		•  Braunite
    Mn
    2+
     
    		Mn
    3+
    6
    		[O
     
    8
    		|SiO
     
    4
    		]
    Reference: [No reference listed]
  		•  Bustamite
    (Mn
    2+
     
    		,Ca)[SiO
     
    3
    		]
    Reference: [No reference listed]
  		•  Calcite
    CaCO
     
    3
    Reference: [Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 1025; Anthony, Bideaux, Bladh, Nichols: Handbook of Mineralogy, Vol. IV.]
  		•  Caryinite
    (Na,Pb)(Ca,Na)(Ca,Mn
    2+
     
    		)(Mn
    2+
     
    		,Mg,Fe
    3+
     
    		)
     
    2
    		[AsO
     
    4
    		]
     
    3
    Reference: [No reference listed]
  		•  'Chloroarsenian'
    Reference: [Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 684.]
  		•  Chondrostibian
    Reference: [Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 1030.]
  		•  Diopside
    CaMg[Si
     
    2
    		O
     
    6
    		]
    Reference: [No reference listed]
  		•  Diopside
    var: Schefferite
    (Ca,Mn)(Mg,Fe,Mn)Si
     
    2
    		O
     
    6
    Reference: [No reference listed]
  		•  Dolomite
    CaMg(CO
     
    3
    		)
     
    2
    Reference: [Anthony, Bideaux, Bladh, Nichols: Handbook of Mineralogy, Vol. IV]
  		•  Feitknechtite
    Mn
    3+
     
    		O(OH)
    Reference: [No reference listed]
  		•  Friedelite
    (Mn,Fe)
     
    8
    		Si
     
    6
    		O
     
    15
    		(OH,Cl)
     
    10
    Reference: [No reference listed]
  		•  Ganophyllite
    (K,Na,Ca)
     
    2
    		Mn
     
    8
    		(Si,Al)
     
    12
    		(O,OH)
     
    32
    		·8H
     
    2
    		O
    Reference: [No reference listed]
  		•  Hausmannite
    MnMn
     
    2
    		O
     
    4
    Reference: [No reference listed]
  		•  Hedyphane
    Pb
     
    3
    		Ca
     
    2
    		[Cl|(AsO
     
    4
    		)
     
    3
    		]
    Reference: [No reference listed]
  		•  Hematite
    Fe
     
    2
    		O
     
    3
    Reference: []
  		•  Hyalophane
    (K,Ba)[Al(Si,Al)Si
     
    2
    		O
     
    8
    		]
    Reference: [No reference listed]
  		•  Inesite
    Ca
     
    2
    		(Mn,Fe)
     
    7
    		Si
     
    10
    		O
     
    28
    		(OH)
     
    2
    		·5H
     
    2
    		O
    Reference: [No reference listed]
  		•  Jacobsite
    Mn
    2+
     
    		Fe
    3+
    2
    		O
     
    4
    Reference: [Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 857.]
  		•  Katoptrite
    (Mn
    2+
     
    		,Mg)
     
    13
    		(Al,Fe
    3+
     
    		)
     
    4
    		Sb
    5+
    2
    		[O
     
    10
    		|SiO
     
    4
    		]
     
    2
    Reference: [Igelström (1885) Bulletin de la Société française de Minéralogie: 8: 143 (as Hematostibite).]
    Site Photo
    Sjö Mine, Grythyttan, Hällefors, Västmanland, Sweden
    © luigi chiappino
  		•  Kutnohorite
    Ca(Mn,Mg,Fe)(CO
     
    3
    		)
     
    2
    Reference: [No reference listed]
  		•  Lamprostibian
    Reference: [Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 1030.]
  		•  Långbanite
    (Mn
    2+
     
    		,Ca)
     
    4
    		(Mn
    3+
     
    		,Fe
    3+
     
    		)
     
    9
    		Sb
    5+
     
    		[O
     
    8
    		|SiO
     
    4
    		]
     
    2
    Reference: [No reference listed]
  		•  Lead
    Pb
    Reference: [No reference listed]
  		•  Magnetite
    Fe
    2+
     
    		Fe
    3+
    2
    		O
     
    4
    Reference: [Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 857; Kjell Gatedal]
  		•  Magnetostibian
    Habit: Grains
    Colour: Black
    Fluorescence: None
    Reference: [Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 1025.]
  		•  Malachite
    Cu
     
    2
    		[(OH)
     
    2
    		|CO
     
    3
    		]
    Reference: []
  		•  Manganberzeliite
    (Ca,Na)
     
    3
    		(Mn
    2+
     
    		,Mg)
     
    2
    		[AsO
     
    4
    		]
     
    3
    Reference: [Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 683.]
  		•  Melanostibian
    (Mn,Fe)
     
    6
    		(SbO
     
    3
    		)
     
    2
    		O
     
    3
    Habit: Tiny, prismatic
    Colour: Black
    Description: Occurs in veinlets in dolomite.
    Reference: [Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 1041.]
  		•  Melanostibite (TL)
    Mn
    2+
     
    		(Sb
    5+
     
    		,Fe
    3+
     
    		)O
     
    3
    Type Locality: Sjö Mine, Grythyttan, Hällefors, Västmanland, Sweden
    Reference: [Zeits.Kryst.Min.(1893) 21, 246-248; J.W. Anthony, R.A. Bideaux, K.W. Bladh, M.C. Nichols: Handbook of Mineralogy, Vol. III (1997)]
  		•  Neotocite
    (Mn,Fe,Mg)SiO
     
    3
    		·H
     
    2
    		O
    Reference: [No reference listed]
  		•  Örebroite (TL)
    Mn
    2+
    3
    		(Fe
    3+
     
    		,Sb
    5+
     
    		)[(O,OH)
     
    3
    		|SiO
     
    4
    		]
    Type Locality: Sjö Mine, Grythyttan, Hällefors, Västmanland, Sweden
    Reference: [Amer.Min.(1986) 71, 1522-1526; Clark, 1993 - "Hey's Mineral Index"]
    Site Photo
    Sjö Mine, Grythyttan, Hällefors, Västmanland, Sweden
    © Pavel M. Kartashov
  		•  Piemontite
    {Ca
     
    2
    		}{Al
     
    2
    		Mn
    3+
     
    		}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    Reference: [No reference listed]
  		•  Pleurasite
    Mn, Fe, AsO
     
    4
    Reference: [Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 845.]
  		•  Plumboferrite ?
    Pb
     
    2
    		Fe
    3+
    11-x
    		Mn
    2+
    x
    		O
     
    19-2x
    		, x = 1/3
    Reference: [http://rruff.geo.arizona.edu/doclib/hom/plumboferrite.pdf.]
  		•  Pyrochroite
    Mn(OH)
     
    2
    Reference: [No reference listed]
  		•  Pyroxmangite
    MnSiO
     
    3
    Reference: [No reference listed]
  		•  Rhodonite
    MnSiO
     
    3
    Reference: [Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 844.]
  		•  Richterite
    Na[CaNa][Mg
     
    5
    		][(OH)
     
    2
    		|Si
     
    8
    		O
     
    22
    		]
    Reference: [No reference listed]
  		•  Roméite
    (Ca,Fe,Mn,Na)
     
    2
    		(Sb,Ti)
     
    2
    		O
     
    6
    		(O,OH,F)
    Reference: [Kjell Gatedal]
  		•  Sarkinite
    Mn
    2+
    2
    		[OH|AsO
     
    4
    		]
    Reference: [Palache, C., Berman, H. & Frondel, C. (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, 7th. edition, Volume I: 640; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 857.]
  		•  Sarkinite
    var: Xanthoarsénite
    Mn
     
    2
    		(As,Sb)O
     
    4
    		OH
    Reference: [Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 858.]
  		•  Scheelite
    Ca[WO
     
    4
    		]
    Reference: [Kjell Gatedal]
  		•  Sillimanite
    Al
     
    2
    		[O|SiO
     
    4
    		]
    Reference: []
  		•  Sjogruvite
    Reference: [Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 845.]
  		•  Spessartine
    Mn
    2+
    3
    		Al
     
    2
    		[SiO
     
    4
    		]
     
    3
    Reference: []
  		•  Sphalerite
    (Zn,Fe
    2+
     
    		)S
    Reference: []
  		•  Stibiatil
    Reference: [Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 1030.]
  		•  Talc
    Mg
     
    3
    		Si
     
    4
    		O
     
    10
    		(OH)
     
    2
    Reference: []
  		•  Tephroite
    Mn
    2+
    2
    		[SiO
     
    4
    		]
    Reference: [Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 857, 1025, 1030.]


    56 entries listed. 43 valid minerals. 3 type localities (valid minerals).

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