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Brunnsjögruvan, Grythyttan, Hällefors, Örebro, Swedeni
Regional Level Types
Brunnsjögruvan- not defined -
Grythyttan- not defined -
Brunnsjögruvan, Grythyttan, Bergslagen, Sweden

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Name(s) in local language(s):Brunnsjögruvan (Brunsjö jerngrufva), Grythyttan, Hällefors, Västmanland, Sverige
Latitude & Longitude (WGS84): 59° 37' 5'' North , 14° 30' 11'' East
Latitude & Longitude (decimal): 59.61833,14.50333
GeoHash:G#: u6d74j1jb
Köppen climate type:Dfc : Subarctic climate
Nearest Settlements:
Grythyttan859 (2017)9.9km
Nykroppa788 (2017)11.3km
Storfors2,218 (2017)16.2km
Hällefors4,449 (2017)18.4km
Persberg249 (2017)20.4km

Note on the mineral list:
"Asbestos" refers to Asbeferrite, a name introduced by Igelström (1867) for a greyish white asbestos amphibole from Brunnsjögruvan, thought to be a variety of Dannemorite (which was renamed Manganogrunerite by IMA in 1997).
Asbeferrite was discredited by CNMMN and defined as a synonym of asbestos (Leake 1978).
Newer studies are needed to establish the exact amphibole species.

Regions containing this locality

Bergslagen, SwedenMining District
Eurasian PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

10 valid minerals.

Detailed Mineral List:

Formula: {CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Reference: Kjell Gatedal
'Amphibole Supergroup'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Reference: Sundius, N. (1924) Zur Kenntnis der monoklinen Ca-armen Amphibole (Grünerit-Cummingtonit-Reihe). Geologiska Föreningen i Stockholm Förhandlingar, 46: 154-167
Formula: ☐{Mg2}{Mg5}(Si8O22)(OH)2
Description: grunerite-cummingtonite series
Reference: Sundius, N. (1924) Zur Kenntnis der monoklinen Ca-armen Amphibole (Grünerit-Cummingtonit-Reihe). Geologiska Föreningen i Stockholm Förhandlingar, 46: 154-167
Eckermannite ?
Formula: NaNa2(Mg4Al}Si8O22(OH)2
Description: Need to be checked if it can be assigned to eckermannite according to the redefinition by IMA (IMA2013-136).
Reference: Victoria Museum Specimen, Melbourne
'Fayalite-Tephroite Series'
Reference: No reference listed
'Fayalite-Tephroite Series var: Knebelite'
Formula: from (Fe1.5Mn0.5)2SiO4 to (Mn1.5Fe0.5)2SiO4
Reference: No reference listed
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Kjell Gatedal
Formula: ☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2
Description: grunerite-cummingtonite series
Reference: Sundius, N. (1924) Zur Kenntnis der monoklinen Ca-armen Amphibole (Grünerit-Cummingtonit-Reihe). Geologiska Föreningen i Stockholm Förhandlingar, 46: 154-167
Formula: Fe3+2(Si2O5)(OH)4 · 2H2O
Reference: No reference listed
Formula: Fe2+Fe3+2O4
Reference: Kjell Gatedal
Manganogrunerite ?
Formula: ☐{Mn2+2}{Fe2+5}(Si8O22)(OH)2
Description: An asbestos-like amphiboles were named as asbeferrite, later thought to be a variety of Dannemorite (which was renamed Manganogrunerite by IMA in 1997). Samples of this materiale is thus sold as " Manganogrunerite". Asbeferrite was however discredited by CNMMN and defined as a synonym of asbestos (Leake 1978). Newer studies are needed to establish the exact amphibole species of this material
Formula: Mn2+TiO3
Reference: Kjell Gatedal
Formula: Fe7S8
Reference: Kjell Gatedal
Formula: (K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Reference: No reference listed
Stilpnomelane var: Ekmanite
Formula: (K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Reference: Hamberg, A. (1889): Mineralogische Śtudien. Geologiska Föreningen i Stockholm Förhandlingar: 11:25-32; Am Min (1954) 39:946-956

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Group 4 - Oxides and Hydroxides
Group 9 - Silicates
Eckermannite ?9.DE.25NaNa2(Mg4Al}Si8O22(OH)2
Hisingerite9.ED.10Fe3+2(Si2O5)(OH)4 · 2H2O
Stilpnomelane9.EG.40(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
var: Ekmanite9.EG.40(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Unclassified Minerals, Rocks, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Fayalite-Tephroite Series'-
'var: Knebelite'-from (Fe1.5Mn0.5)2SiO4 to (Mn1.5Fe0.5)2SiO4
'Garnet Group'-X3Z2(SiO4)3
Manganogrunerite ?-☐{Mn2+2}{Fe2+5}(Si8O22)(OH)2

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Eckermannite ?66.1.3c.6NaNa2(Mg4Al}Si8O22(OH)2
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 1:1 layers
Hisingerite71.1.5.2Fe3+2(Si2O5)(OH)4 · 2H2O
Group 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined islands
Stilpnomelane74.1.1.1(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Unclassified Minerals, Mixtures, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Fayalite-Tephroite Series'-
'var: Knebelite'-from (Fe1.5Mn0.5)2SiO4 to (Mn1.5Fe0.5)2SiO4
'Garnet Group'-X3Z2(SiO4)3
Manganogrunerite ?-☐{Mn2+2}{Fe2+5}(Si8O22)(OH)2
var: Ekmanite
-(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O

List of minerals for each chemical element

H Cummingtonite☐{Mg2}{Mg5}(Si8O22)(OH)2
H Grunerite☐{Fe22+}{Fe52+}(Si8O22)(OH)2
H HisingeriteFe23+(Si2O5)(OH)4 · 2H2O
H Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
H Stilpnomelane (var: Ekmanite)(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
H Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
H Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
H Manganogrunerite☐{Mn22+}{Fe52+}(Si8O22)(OH)2
H EckermanniteNaNa2(Mg4Al}Si8O22(OH)2
O Cummingtonite☐{Mg2}{Mg5}(Si8O22)(OH)2
O Grunerite☐{Fe22+}{Fe52+}(Si8O22)(OH)2
O HisingeriteFe23+(Si2O5)(OH)4 · 2H2O
O Fayalite-Tephroite Series (var: Knebelite)from (Fe1.5Mn0.5)2SiO4 to (Mn1.5Fe0.5)2SiO4
O Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
O MagnetiteFe2+Fe23+O4
O Garnet GroupX3Z2(SiO4)3
O Stilpnomelane (var: Ekmanite)(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
O Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
O PyrophaniteMn2+TiO3
O Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
O Manganogrunerite☐{Mn22+}{Fe52+}(Si8O22)(OH)2
O EckermanniteNaNa2(Mg4Al}Si8O22(OH)2
F Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Na Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Na Stilpnomelane (var: Ekmanite)(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Na EckermanniteNaNa2(Mg4Al}Si8O22(OH)2
Mg Cummingtonite☐{Mg2}{Mg5}(Si8O22)(OH)2
Mg Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Mg Stilpnomelane (var: Ekmanite)(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Mg EckermanniteNaNa2(Mg4Al}Si8O22(OH)2
Al Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Al Stilpnomelane (var: Ekmanite)(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Al Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Al Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Al EckermanniteNaNa2(Mg4Al}Si8O22(OH)2
Si Cummingtonite☐{Mg2}{Mg5}(Si8O22)(OH)2
Si Grunerite☐{Fe22+}{Fe52+}(Si8O22)(OH)2
Si HisingeriteFe23+(Si2O5)(OH)4 · 2H2O
Si Fayalite-Tephroite Series (var: Knebelite)from (Fe1.5Mn0.5)2SiO4 to (Mn1.5Fe0.5)2SiO4
Si Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Si Garnet GroupX3Z2(SiO4)3
Si Stilpnomelane (var: Ekmanite)(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Si Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Si Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Si Manganogrunerite☐{Mn22+}{Fe52+}(Si8O22)(OH)2
Si EckermanniteNaNa2(Mg4Al}Si8O22(OH)2
S PyrrhotiteFe7S8
Cl Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
K Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
K Stilpnomelane (var: Ekmanite)(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Ca Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Ca Stilpnomelane (var: Ekmanite)(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Ca Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Ti PyrophaniteMn2+TiO3
Ti Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Mn Fayalite-Tephroite Series (var: Knebelite)from (Fe1.5Mn0.5)2SiO4 to (Mn1.5Fe0.5)2SiO4
Mn PyrophaniteMn2+TiO3
Mn Manganogrunerite☐{Mn22+}{Fe52+}(Si8O22)(OH)2
Fe Grunerite☐{Fe22+}{Fe52+}(Si8O22)(OH)2
Fe HisingeriteFe23+(Si2O5)(OH)4 · 2H2O
Fe Fayalite-Tephroite Series (var: Knebelite)from (Fe1.5Mn0.5)2SiO4 to (Mn1.5Fe0.5)2SiO4
Fe Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Fe MagnetiteFe2+Fe23+O4
Fe PyrrhotiteFe7S8
Fe Stilpnomelane (var: Ekmanite)(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Fe Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Fe Manganogrunerite☐{Mn22+}{Fe52+}(Si8O22)(OH)2
Ce Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)

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

1600 - 2500 Ma

ID: 3184907
Paleoproterozoic sedimentary rocks

Age: Proterozoic (1600 - 2500 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

1600 - 2500 Ma

ID: 3131099
Proterozoic I meta-sandstone

Age: Proterozoic (1600 - 2500 Ma)

Description: undifferentiated metamorphic

Lithology: Major:{meta-sandstone}, Minor{mica schist,gneiss,amphibolite}

Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3. [147]

1800 - 2050 Ma

ID: 2630574

Age: Orosirian (1800 - 2050 Ma)

Description: Sveconorwegian orogen; Eastern Segment, upper unit

Lithology: Sandstone, mudstone, conglomerate, volcanic rock, 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, used under Creative Commons Attribution 4.0 License


Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Hamberg, A. (1889) Mineralogische Śtudien. Geologiska Föreningens i Stockholm Förhandlingar, 11, 25-32.
Wilke, H.-J. (1976) Mineral-Fundstellen Band 4: Skandinavien. Chr. Weise Verlag, München, 370 pp. (pp. 217-219).

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