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Glomsrudkollen Zinc Mines, Åmot, Modum, Buskerud, Norway

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Latitude & Longitude (WGS84): 59° 52' 55'' North , 9° 58' 46'' East
Latitude & Longitude (decimal): 59.88222,9.97972
Other regions containing this locality:Scandinavia
Köppen climate type:Dfc : Subarctic climate
Name(s) in local language(s):Glomsrudkollen gruver, Åmot, Modum kommune, Buskerud fylke, Norge

Old mine run on chalcopyrite-pyrrhotite-sphalerite ore. In contact with metamorphic garnet-amphibole-epidote skarn.

In 1870 they started test-mining on sphalerite at Glomsrudkollen on Øståsen in southern Modum. Four or five men started this year the mining, and during one month they got 110 tons of black ore, but despite that they stopped the mining.
In 1899 a Belgian company started test-mining with 20 men. They mined 286 tons ore with 30-50% zinc, the mining ended by the end of the year. In 1907 once again they started mining, and the year after 56 persons worked in the mines.
In 1909 the rights was given to a German company.
The mining at Glomsrudkollen ended in 1921 and in 1928 the mines where sold to an other company, but the mining never started again.

The dumps outside the lower adit (Bunnstollen, see the map) is unfortunately nearly totally removed today used in road constructions. These dumps produced several interesting specimens in the 1970s-1980s.

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.

Mineral List

52 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

443.8 - 541 Ma

ID: 1383320
Cambrian-Ordovician sedimentary rocks

Age: Paleozoic (443.8 - 541 Ma)

Lithology: Sedimentary rocks

Reference: Geological Survey of Canada. Generalized geological map of the world and linked databases. doi:10.4095/195142. Open File 2915d. [18]

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.


Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Goldschmidt, V.M. (1911): Die Kontaktmetamorphose im Kristianiagebiet . Videnskapsselskapets Skrifter. 1.Mat.-Naturv. Klasse 1911. No 1. Kristiania. 483p
Dalane, J. (1973): Ktenasitt. NAGS-nytt, 1 (1), 3
Pedersen, F.(1976): En geologisk undersøkelse af den kontakt metasomatiske zinkmineralsering i Glomsrud- miner, Buskerud fylke, Norge. Unpublished thesis, Geolgisk Institut,University of Århus, Denmark. 73 s.
Mathisen, C.O., Olerud, S. & Eidsvig, P. (1976): Undersøkelser av Statens bergrettigheter 1976. NGU -rapport nr 1430/17A. Geologiske og geofysiske undersøkelser ved Glomsrudkollen, Modum, Buskerud
Raade, G.; Elliott, C.J. & Fejer, E.E. (1977): New data on Ktenasite. Mineralogical Magazine 41, 65-70 [on ktenasite from Glomsrudkollen]
Berg,H.-J. (1990): Etter Neumann. Cosalitt. STEIN 17(2),37
Berg,H.-J. (1990): Etter Neumann. Devillin. STEIN 17(2),37
Berg,H.-J.(1990): Etter Neumann. Anatas. STEIN 17(3),40
Pettersen, B.(1990): En mineral-analyse. STEIN 17(3),39
Raade,G.(1995): Secondary Zn and Cu minerals from contact deposits of the Oslo region, Norway. Bergverksmuseet Skrift nr 9, 18-26
Raade, G. (1997): Secondary Zn and Cu minerals from the Oslo region, Norway: Addendum. Bergverksmuseets Skrift nr 12, 12-13
Nordrum, F.S. (2002): Nyfunn av mineraler i Norge 2001-2002. Norsk Bergverksmuseum Skrift. 20: 78-83
Larsen, K. E. (2003): Mineralspalta. STEIN 30 (1): 20-21 [notice on the find of ktenasite]
Kolitsch, U. & Raade, G. (2011): Uric acid dihydrate: occurrences in Austria and Norway. Norsk Bergverksmuseum Skrift. 46: 25-29

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