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Bjässhöjden (Kämpetorp), Hjulsjö, Hällefors, Västmanland, Sweden

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Latitude & Longitude (WGS84): 59° 48' 26'' North , 14° 50' 35'' East
Latitude & Longitude (decimal): 59.80749,14.84327
Other regions containing this locality:Scandinavia
Köppen climate type:Dfc : Subarctic climate
Name(s) in local language(s):Bjässhöjden (Kämpetorp), Hjulsjö


The first (Palaeoproterozoic) magnesite deposit found in the Bergslagen area. Occurs in carbonates at the contact between metabasite (gabbro) and acid metavolcanics. The deposit, composed of 5–20 m thick horizons was formed by replacement of a carbonate precursor through hydrothermal alteration, induced by the emplacement of the gabbro intrusion.
Cordierite occurs in metasomatised felsic metavolcanic rock; hornblende and plagioclase at the contact to the metagabbro.
Irregularly shaped iron-oxide mineralizations occur at the contact metagabbro-metavolcanics and consist of massive, fine-grained magnetite with minor chalcopyrite and pyrite and occasional coarse-grained, dark green hornblende.

Situated in the eastern part of the Hjulsjö area between Vasselsjö and Salbosjön; SW of Kopparberg.


Mineral List


12 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 Macrostrat.org

Orosirian
1800 - 2050 Ma



ID: 2631724

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 Macrostrat.org, used under Creative Commons Attribution 4.0 License



This page contains all mineral locality references listed on mindat.org. 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 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.

References

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Hogmalm, K.J., Hellingwerf, R., Cornell, D.H. & Finger, F. (2012): An epigenetic magnesite deposit in the Bergslagen area, central Sweden. GFF, 134, 7-18.

Mineral and/or Locality  
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