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Sjögruvan, Grythyttan, Hällefors, Västmanland, Sweden

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Latitude & Longitude (WGS84): 59° 50' North , 15° 32' East
Latitude & Longitude (decimal): 59.83333,15.53333
Other regions containing this locality:Scandinavia
Köppen climate type:Dfc : Subarctic climate
Name(s) in local language(s):Sjögruvan (Sjögrufvan), Grythyttan, Hällefors, Västmanland, Sverige

Note on the name: the name Sjögruvan is the proper name of this locality and should not be translated into the English "Sjö mine", even though the name Sjögruvan means when translated "Sjö mine".

The Sjögruvan Mine was worked on a minor deposit. The paragenesis is of the Långban type. The mine is located on the southern shore of the lake Halvtron about 5 km southeast of the small village Grythyttan.

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 1860s, 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.

Formerly in the Örebro County.

Mineral List

56 valid minerals. 3 (TL) - type locality of valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on

1800 - 2050 Ma

ID: 2631869

Age: Orosirian (1800 - 2050 Ma)

Description: Svecokarelian orogen; Bergslagen lithotectonic unit

Lithology: Rhyolite, dacite, metamorphic

Reference: Bergman, S., M.B. Sephens, J. Andersson, B. Kathol, T. Bergman. Sveriges berggrund, skala 1:1 miljon. Sveriges geologiska undersökning K 423. [95]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License

This page contains all mineral locality references listed on 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 locality information is for reference purposes only. You should never attempt to visit any sites listed in 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.


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Igelström, L.J. (1886): Polyarsenit och hæmatostibiit. Geologiska Föreningen i Stockholm Förhandlingar 8: 179-181 [on sarkinite and katoprite from Sjögruvan]
Igelström, L.J. (1886): Mineralogiska meddelanden. 4. Braunit från Sjögrufvan, Grythytte socken, Örebro län. Geologiska Föreningens i Stockholm Förhandlingar 8: 477
Igelström, L. J. (1888): Arseniopleit, ein neues mineral von der hausmannit- und braunitgrube Sjögrufvan, Kirchspiel Grythyttan, Gouvernement Oerebro, Schweden. Neues Jahrbuch für Mineralogie, Geologie und Palaontologie. 2, 117-122
Igelström, L. J. (1893): Melanostibian, ein neues mineral von der Manganerzgrube Sjögrufvan, Kirchspiel Grythyttan, Gouvernement Örebro, Schweden. Zeitschrift für Krystallographie und Mineralogie. 21, 246-248
Igelström, L.J. (1893): Mineralogiska meddelanden. 20. Nya mineral från Sjögrufvan. Geologiska Föreningens i Stockholm. Förhandlinger. 15: 471-472.
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.
Dunn, P. J., Peacor, D. R., Erd, R. C. & Ramik, R. A. (1986): Franciscanite and örebroite, two new minerals from California and Sweden, related to redefined welinite. American Mineralogist. 71, 1522-1526
Holtstam, D. (2001): W and V mineralization in Långban- type Fe-Mn deposits: Epigenetic or Syngenetic? Geologiske Föreningen i Stockholm Förhandlingar 123, 29-33.
Fontan, F.; Holtstam, D.; de Parseval, P.; Permingeat, F. and Mason, B. (2004): Elfstorpite synonymy with allactite; mineral and name discredited. Mineralogical Magazine 68, 523-526.
Mineralium Deposita: 36(7): 641-657.

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