Östanmossa mine, Röberg ore field, Norberg, Västmanland, Sweden
|Latitude & Longitude (WGS84):||60° 5' North , 15° 56' East|
|Latitude & Longitude (decimal):||60.08333,15.93333|
|Other regions containing this locality:||Scandinavia|
|Köppen climate type:||Dfc : Subarctic climate|
|Name(s) in local language(s):||Östanmossagruvan (Östanmossgruvan), Röbergsfältet , Norberg, Västmanland, Sverige|
The Östanmossa mine produced iron ore from a skarn in the period from 1859 to 1934. The mine is worked to a depth of 114.9m. The Östanmossa mine is a Bastnäs-type REE deposits, belonging to the subtype (2) of Sahlström (Norberg type) in that it is enriched in heavy REE (HREE), Y, Mg, Ca, and F. The REE deposits are hosted in skarns associated with marble horizons in a strongly Na, K, and/or Mg-altered, metavolcanic succession.
Östanmossa deposit is the type locality for dollaseite-(Ce).
21 valid minerals. 2 (TL) - type locality of valid minerals.
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 Macrostrat.org
1600 - 2500 Ma
|Igneous: extrusive; Extrusive: intermediate|
Age: Proterozoic (1600 - 2500 Ma)
Description: Northern Europe, Svecofennian and Lapland-Kola orogens
Comments: Orogen, fold-thrust belt, folded region; Koistinen et al., 2001; Sigmond, 2002; Solli, unpublished compilation, 2007-08; Bergman et al., unpublished revisions, 2007-08
Lithology: Felsic and intermediate volcanic rocks
Reference: J.C. Harrison, M.R. St-Onge, O.V. Petrov, S.I. Strelnikov, B.G. Lopatin, F.H. Wilson, S. Tella, D. Paul, T. Lynds, S.P. Shokalsky, C.K. Hults, S. Bergman, H.F. Jepsen, and A. Solli. Geological map of the Arctic. doi:10.4095/287868. Geological Survey of Canada Map 2159A. 
1800 - 2050 Ma
Geijer, P. (1927): Some mineral associations from the Norberg District. Sveriges Geologiska Undersökning, 20, l-32 [first note on dollaseite-(Ce) as "magnesium orthite" from Östanmoss mine]
Peacor, D. R. & Dunn, P. J.: (1988): Dollaseite-(Ce) (magnesium orthite redefined): Structure refinement and implications for F + M2+ substitutions in epidote-group minerals. American Mineralogist. 73: 838- 842
Grew et al. (1991): Dissakisite-(Ce), a New member of the epidote group and the Mg analogue of allanite-(Ce), from Antarctica. American Mineralogist, 76, 1990-1997.
Holtstam, D., Andersson, U.B. (2007): The REE minerals of the Bastnäs-type deposits, South-Central Sweden. Canadian Mineralogist. 45, 1073-1114
Sahlström, Fredrik (2014): Stable Isotope Systematics of Skarn-hosted REE-silicate Magnetite mineralisations in Central Bergslagen, Sweden, Examensarbete vid Institutionen för geovetenskaper Nr 279, 87 pages