Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Grängsbo Copper Mines, Bollnäs, Gävleborg County, Swedeni
Regional Level Types
Grängsbo Copper MinesGroup of Mines
BollnäsMunicipality
Gävleborg CountyCounty
SwedenCountry

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Type:
Group of Mines
Mindat Locality ID:
10733
Long-form identifier:
mindat:1:2:10733:3
GUID (UUID V4):
0


According to Tegengren (1924) the mines where in production in 17th century. Other sources claim that they where mined already in the 14th. During exploration work in the -80ies selected sampling in the waste dumps gave 1,92 %Cu and 9,6 ppm Au. One sample from a ditch gave 1,37 % Zn.
In all there are 13 mines along a 350 stretch- to mention a few; Höggruvan, Nygruvan, Försöket, Grängsbo gruva, Forngruvan, Bångagruvan.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

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


Mineral List


6 valid minerals.

Detailed Mineral List:

ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ Native Copper
Formula: Cu
ⓘ Native Gold
Formula: Au
ⓘ Pyrite
Formula: FeS2
References:
rapp 130(2009)
ⓘ Pyrrhotite
Formula: Fe1-xS
ⓘ Sphalerite
Formula: ZnS
References:
rapp 130(2009)

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Copper1.AA.05Cu
ⓘNative Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
ⓘSphalerite2.CB.05aZnS
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘPyrite2.EB.05aFeS2

List of minerals for each chemical element

SSulfur
Sⓘ ChalcopyriteCuFeS2
Sⓘ PyriteFeS2
Sⓘ PyrrhotiteFe1-xS
Sⓘ SphaleriteZnS
FeIron
Feⓘ ChalcopyriteCuFeS2
Feⓘ PyriteFeS2
Feⓘ PyrrhotiteFe1-xS
CuCopper
Cuⓘ ChalcopyriteCuFeS2
Cuⓘ Native CopperCu
ZnZinc
Znⓘ SphaleriteZnS
AuGold
Auⓘ Native GoldAu

Fossils

This region is too big or complex to display the fossil list, try looking at smaller subregions.

Other Regions, Features and Areas that Intersect

Baltic Shield (Fennoscandian Shield)Shield
Eurasian Plate

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

Wik, Nils-Gunnar, Albrecht, Lena, Bergman, Stefan, Kübler, Lutz, Sundberg, Arne (2009) Malmer, industriella mineral och bergarter i Gävleborgs län [Ores, industrial minerals and rocks in Gävleborg County]. Sveriges Geologiska Undersökning. Rapporter och Meddelanden 130 310 pp.
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