Sjögruvan, Grythyttan, Hällefors, Västmanland, Sweden
|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.
56 valid minerals. 3 (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
1800 - 2050 Ma