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Joma Mines, Røyrvik, Trøndelag, Norwayi
Regional Level Types
Joma MinesGroup of Mines
RøyrvikMunicipality
TrøndelagCounty
NorwayCountry

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Latitude & Longitude (WGS84):
64° 51' 11'' North , 13° 53' 5'' East
Latitude & Longitude (decimal):
64.85311,13.88492
GRN:
N44E05
Type:
Group of Mines
Deposit first discovered:
1911
Age:
485.4 ± 1.9 to 443.8 ± 1.5 Ma
Geologic Time:
Ordovician
Reference for age:
Geological Survey of Norway. The Ore Database. Deposit Area 1739 - 039. Joma
Köppen climate type:
Dfc : Subarctic climate
Nearest Settlements:
PlacePopulationDistance
Røyrvik254 (2018)15.6km
Gäddede312 (2017)41.2km
Mindat Locality ID:
33954
Long-form identifier:
mindat:1:2:33954:3
GUID (UUID V4):
0
Other/historical names associated with this locality:
Nord-Trøndelag
Other Languages:
Norwegian:
Joma gruver, Røyrvik, Trøndelag, Norge


Mines worked on sulphide ores (mainly pyrite) located on the Jomafjellet mountain. Operated by Grong Gruber 1972 to 1998.

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


18 valid minerals.

Rock Types Recorded


Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Actinolite
Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
ⓘ Albite
Formula: Na(AlSi3O8)
ⓘ 'Amphibole Supergroup'
Formula: AB2C5(T8O22)W2
ⓘ Arsenopyrite
Formula: FeAsS
ⓘ Calcite
Formula: CaCO3
ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ 'Chlorite Group'
ⓘ Cobaltite
Formula: CoAsS
ⓘ Cubanite
Formula: CuFe2S3
ⓘ Galena
Formula: PbS
ⓘ Ilmenite
Formula: Fe2+TiO3
ⓘ Mackinawite
Formula: FeS
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
ⓘ Native Copper
Formula: Cu
ⓘ Native Silver
Formula: Ag
ⓘ Pyrite
Formula: FeS2
ⓘ Pyrrhotite
Formula: Fe1-xS
ⓘ Quartz
Formula: SiO2
ⓘ Sphalerite
Formula: ZnS
ⓘ 'Tetrahedrite Subgroup'
Formula: Cu6(Cu4C2+2)Sb4S12S
ⓘ Valleriite
Formula: (Fe2+,Cu)4(Mg,Al)3S4(OH,O)6

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Copper1.AA.05Cu
ⓘNative Silver1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
ⓘSphalerite2.CB.05aZnS
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘCubanite2.CB.55aCuFe2S3
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘMackinawite2.CC.25FeS
ⓘGalena2.CD.10PbS
ⓘPyrite2.EB.05aFeS2
ⓘArsenopyrite2.EB.20FeAsS
ⓘCobaltite2.EB.25CoAsS
ⓘValleriite2.FD.30(Fe2+,Cu)4(Mg,Al)3S4(OH,O)6
ⓘ'Tetrahedrite Subgroup'2.GB.05Cu6(Cu4C2+2)Sb4S12S
Group 4 - Oxides and Hydroxides
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘIlmenite4.CB.05Fe2+TiO3
ⓘQuartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
Group 9 - Silicates
ⓘActinolite9.DE.10◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
ⓘAlbite9.FA.35Na(AlSi3O8)
Unclassified
ⓘ'Amphibole Supergroup'-AB2C5(T8O22)W2
ⓘ'Chlorite Group'-

List of minerals for each chemical element

HHydrogen
Hⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Hⓘ Valleriite(Fe2+,Cu)4(Mg,Al)3S4(OH,O)6
CCarbon
Cⓘ CalciteCaCO3
OOxygen
Oⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ Amphibole SupergroupAB2C5(T8O22)W2
Oⓘ CalciteCaCO3
Oⓘ IlmeniteFe2+TiO3
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ QuartzSiO2
Oⓘ Valleriite(Fe2+,Cu)4(Mg,Al)3S4(OH,O)6
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
MgMagnesium
Mgⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Mgⓘ Valleriite(Fe2+,Cu)4(Mg,Al)3S4(OH,O)6
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ Valleriite(Fe2+,Cu)4(Mg,Al)3S4(OH,O)6
SiSilicon
Siⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ QuartzSiO2
SSulfur
Sⓘ ArsenopyriteFeAsS
Sⓘ ChalcopyriteCuFeS2
Sⓘ CobaltiteCoAsS
Sⓘ CubaniteCuFe2S3
Sⓘ GalenaPbS
Sⓘ MackinawiteFeS
Sⓘ PyriteFeS2
Sⓘ PyrrhotiteFe1-xS
Sⓘ SphaleriteZnS
Sⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
Sⓘ Valleriite(Fe2+,Cu)4(Mg,Al)3S4(OH,O)6
CaCalcium
Caⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Caⓘ CalciteCaCO3
TiTitanium
Tiⓘ IlmeniteFe2+TiO3
FeIron
Feⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Feⓘ ArsenopyriteFeAsS
Feⓘ ChalcopyriteCuFeS2
Feⓘ CubaniteCuFe2S3
Feⓘ IlmeniteFe2+TiO3
Feⓘ MackinawiteFeS
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ PyriteFeS2
Feⓘ PyrrhotiteFe1-xS
Feⓘ Valleriite(Fe2+,Cu)4(Mg,Al)3S4(OH,O)6
CoCobalt
Coⓘ CobaltiteCoAsS
CuCopper
Cuⓘ ChalcopyriteCuFeS2
Cuⓘ CubaniteCuFe2S3
Cuⓘ Native CopperCu
Cuⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
Cuⓘ Valleriite(Fe2+,Cu)4(Mg,Al)3S4(OH,O)6
ZnZinc
Znⓘ SphaleriteZnS
AsArsenic
Asⓘ ArsenopyriteFeAsS
Asⓘ CobaltiteCoAsS
AgSilver
Agⓘ Native SilverAg
SbAntimony
Sbⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
PbLead
Pbⓘ GalenaPbS

Other Databases

Link to Geological Survey of Norway:281

Other Regions, Features and Areas containing this locality

Eurasian PlateTectonic Plate
EuropeContinent
ScandinaviaRegion

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References

Vogt, J. H. L. (1915) Gronggruberne og Nordlandsbanen [The Grong mines and the Nordland Railway]. Norges Geologiske Undersøkelse 72. Norges Geologiske Undersøkelse - In commission of H. Aschehoug & Co. 108 pp.
Logn, Ø, Bølviken, B (1974) Self potentials at the Joma pyrite deposit, Norway. Geoexploration, 12. 11-28 doi:10.1016/0016-7142(74)90003-9
Giles, Alan D., Marshall, Brian (1994) Fluid inclusion studies on a multiply deformed, metamorphosed volcanic-associated massive sulfide deposit, Joma Mine, Norway. Economic Geology, 89 (4) 803-819 doi:10.2113/gsecongeo.89.4.803
(2024) Deposit Area 1739 - 039. Joma. The Ore Database, Geological Survey of Norway.
Malafeevskiy, Nikita; Lode, Stefanie; Røstad, Jostein; Larsen, Rune B.; Aasly, Kurt (2025) An initial characterization for revalorization of the Joma mine tailings, Norway. Minerals Engineering, 228. p.109360. doi:10.1016/j.mineng.2025.109360
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