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Östanmossa mine, Röberg ore field, Norberg, Västmanland County, Swedeni
Regional Level Types
Östanmossa mineMine
Röberg ore fieldOre Field
NorbergMunicipality
Västmanland CountyCounty
SwedenCountry
Östanmossa mine, Röberg ore field, Bergslagen mining district, Sweden

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PhotosMapsSearch
Latitude & Longitude (WGS84):
60° 4' 59'' North , 15° 55' 59'' East
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Norberg4,653 (2017)2.1km
Annelund503 (2018)10.8km
Fagersta11,936 (2017)11.7km
Avesta11,949 (2017)14.3km
Hedkärra201 (2017)16.0km
Mindat Locality ID:
14533
Long-form identifier:
mindat:1:2:14533:3
GUID (UUID V4):
4a46c937-747a-4ab0-9046-102b63efda9f
Name(s) in local language(s):
Östanmossagruvan (Östanmossgruvan), Röbergsfältet , Norberg, Västmanland, Sverige


The Östanmossa mine produced iron ore from a skarn in the period from 1859 to 1934. The mine is worked to a depth of 114.9m. The Östanmossa mine is a Bastnäs-type REE deposit, belonging to the subtype (2) of Sahlström (Norberg type) in that it is enriched in heavy REE (HREE), Y, Mg, Ca, and F. The REE deposits are hosted in skarns associated with marble horizons in a strongly Na, K, and/or Mg-altered, metavolcanic succession.

The Östanmossa deposit is the type locality for dollaseite-(Ce), arrheniusite-(Ce), and norbergite.

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


21 valid minerals. 3 (TL) - type locality of valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Actinolite
Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
'Allanite Group'
Formula: (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
Description: The composition of the various grains and crystals of allanite group minerals are of an intermediate composition between dissakisite-(Ce), dollaseite-(Ce) and allanite-(Ce). Jansson (2001) distinguishes between dissakisite-(Ce) and dollaseite-(Ce) based on paragenesis. Small, anhedral grains and masses embedded in tremolite and larger tabular crystals embedded in calcite lenses within the tremolite are considered to be dissakisite-(Ce), whereas the material embedded in the dolomite marble associated with norbergite and magnetite is considered to be dollaseite-(Ce). The analytical basis for this distinction is quite slim.
'Amphibole Supergroup'
Formula: AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Arrheniusite-(Ce) (TL)
Formula: CaMg[(Ce7Y3)Ca5](SiO4)4(Si2B3AsO18)(BO3)F11
Type Locality:
Bastnäsite-(Ce)
Formula: Ce(CO3)F
Colour: Yellowgreen
Description: See photo
Bismuthinite
Formula: Bi2S3
Calcite
Formula: CaCO3
Cerite-(CeCa) ?
Formula: (Ce7Ca2)◻Mg(SiO4)3(SiO3OH)4(OH)3
'Chlorite Group'
Chondrodite
Formula: Mg5(SiO4)2F2
Description: Chondrodite is found in an association with allanite-(Ce), tremolite and magnetite.
Clinohumite
Formula: Mg9(SiO4)4F2
Colour: orange
Description: Clinohumite (and chondrodite?) is quite common in the ophicalcite where it occurs as small orange aggregates together with calcite and serpentine, sometimes also together with fluorite.
Dissakisite-(Ce)
Formula: (CaCe)(AlAlMg)O[Si2O7][SiO4](OH)
Habit: massive
Colour: red-brown, chocolate brown to black
Description: Both subaluminous, ferroan dissakisite-(Ce) and Fe-poor dollaseite-(Ce) occurs at Östanmossa Mine (Grew et al. 1991). The composition of the various grains and crystals of allanite group minerals are of an intermediate composition between dissakisite-(Ce), dollaseite-(Ce) and allanite-(Ce). Jansson (2001) distinguishes between dissakisite-(Ce) and dollaseite-(Ce) based on paragenesis. Small, anhedral grains and masses embedded in tremolite and larger tabular crystals embedded in calcite lenses within the tremolite are considered to be dissakisite-(Ce), whereas the material embedded in the dolomite marble associated with norbergite and magnetite is considered to be dollaseite-(Ce). The analytical basis for this distinction is quite slim. The individual grains embedded in tremolite are rarely visible to the naked eye, whereas the tabular crystals found embedded in calcite lenses in tremolite can be up to up to 4-10 mm.
Dollaseite-(Ce) (TL)
Formula: (CaCe)(MgAlMg)F[Si2O7][SiO4](OH)
Type Locality:
Habit: massive
Colour: Brown
Description: The composition of the various grains and crystals of allanite group minerals are of an intermediate composition between dissakisite-(Ce), dollaseite-(Ce) and allanite-(Ce). Jansson (2001) distinguishes between dissakisite-(Ce) and dollaseite-(Ce) based on paragenesis. Small, anhedral grains and masses embedded in tremolite and larger tabular crystals embedded in calcite lenses within the tremolite are considered to be dissakisite-(Ce), whereas the material embedded in the dolomite marble associated with norbergite and magnetite is considered to be dollaseite-(Ce). The analytical basis for this distinction is quite slim.
Dolomite
Formula: CaMg(CO3)2
Fluorbritholite-(Y)
Formula: (Y,Ca)5(SiO4)3F
Gadolinite-(Ce)
Formula: (Ce,La,Nd,Y)2Fe2+Be2Si2O10
Habit: microscopic granular
Colour: green
Gadolinite-(Y)
Formula: Y2Fe2+Be2Si2O10
Magnetite
Formula: Fe2+Fe3+2O4
Molybdenite
Formula: MoS2
Norbergite (TL)
Formula: Mg3(SiO4)F2
Type Locality:
Colour: pink, white, purplish
Description: NOrbergite occurs as massive occurs in massive pink (purplish) to white aggregates and is associated with tremolite and an epidote group minerals. Only massive aggregates have been found Östanmossa iron mine
Parisite-(Ce)
Formula: CaCe2(CO3)3F2
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Pyrite
Formula: FeS2
Tremolite
Formula: ◻Ca2Mg5(Si8O22)(OH)2

Gallery:

(CaCe)(MgAlMg)F[Si2O7][SiO4](OH) Dollaseite-(Ce) (TL)

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Bismuthinite2.DB.05Bi2S3
Molybdenite2.EA.30MoS2
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Magnetite4.BB.05Fe2+Fe3+2O4
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Dolomite5.AB.10CaMg(CO3)2
Bastnäsite-(Ce)5.BD.20aCe(CO3)F
Parisite-(Ce)5.BD.20bCaCe2(CO3)3F2
Group 9 - Silicates
Norbergite (TL)9.AF.40Mg3(SiO4)F2
Chondrodite9.AF.45Mg5(SiO4)2F2
Clinohumite9.AF.55Mg9(SiO4)4F2
Cerite-(CeCa) ?9.AG.20(Ce7Ca2)◻Mg(SiO4)3(SiO3OH)4(OH)3
Fluorbritholite-(Y)9.AH.25(Y,Ca)5(SiO4)3F
Arrheniusite-(Ce) (TL)9.AJ.CaMg[(Ce7Y3)Ca5](SiO4)4(Si2B3AsO18)(BO3)F11
Gadolinite-(Ce)9.AJ.20(Ce,La,Nd,Y)2Fe2+Be2Si2O10
Gadolinite-(Y)9.AJ.20Y2Fe2+Be2Si2O10
Dollaseite-(Ce) (TL)9.BG.05(CaCe)(MgAlMg)F[Si2O7][SiO4](OH)
Dissakisite-(Ce)9.BG.05b(CaCe)(AlAlMg)O[Si2O7][SiO4](OH)
Tremolite9.DE.10◻Ca2Mg5(Si8O22)(OH)2
Actinolite9.DE.10◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Unclassified
'Amphibole Supergroup'-AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Chlorite Group'-
'Allanite Group'-(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)

List of minerals for each chemical element

HHydrogen
H Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
H Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
H Cerite-(CeCa)(Ce7Ca2)◻Mg(SiO4)3(SiO3OH)4(OH)3
H Dissakisite-(Ce)(CaCe)(AlAlMg)O[Si2O7][SiO4](OH)
H Dollaseite-(Ce)(CaCe)(MgAlMg)F[Si2O7][SiO4](OH)
H PhlogopiteKMg3(AlSi3O10)(OH)2
H Tremolite◻Ca2Mg5(Si8O22)(OH)2
H Allanite Group(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
BeBeryllium
Be Gadolinite-(Ce)(Ce,La,Nd,Y)2Fe2+Be2Si2O10
Be Gadolinite-(Y)Y2Fe2+Be2Si2O10
BBoron
B Arrheniusite-(Ce)CaMg[(Ce7Y3)Ca5](SiO4)4(Si2B3AsO18)(BO3)F11
CCarbon
C Bastnäsite-(Ce)Ce(CO3)F
C CalciteCaCO3
C DolomiteCaMg(CO3)2
C Parisite-(Ce)CaCe2(CO3)3F2
OOxygen
O Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
O Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
O Bastnäsite-(Ce)Ce(CO3)F
O CalciteCaCO3
O Cerite-(CeCa)(Ce7Ca2)◻Mg(SiO4)3(SiO3OH)4(OH)3
O ChondroditeMg5(SiO4)2F2
O ClinohumiteMg9(SiO4)4F2
O Dissakisite-(Ce)(CaCe)(AlAlMg)O[Si2O7][SiO4](OH)
O Dollaseite-(Ce)(CaCe)(MgAlMg)F[Si2O7][SiO4](OH)
O DolomiteCaMg(CO3)2
O Gadolinite-(Ce)(Ce,La,Nd,Y)2Fe2+Be2Si2O10
O Gadolinite-(Y)Y2Fe2+Be2Si2O10
O MagnetiteFe2+Fe23+O4
O NorbergiteMg3(SiO4)F2
O Parisite-(Ce)CaCe2(CO3)3F2
O PhlogopiteKMg3(AlSi3O10)(OH)2
O Tremolite◻Ca2Mg5(Si8O22)(OH)2
O Fluorbritholite-(Y)(Y,Ca)5(SiO4)3F
O Allanite Group(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
O Arrheniusite-(Ce)CaMg[(Ce7Y3)Ca5](SiO4)4(Si2B3AsO18)(BO3)F11
FFluorine
F Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
F Bastnäsite-(Ce)Ce(CO3)F
F ChondroditeMg5(SiO4)2F2
F ClinohumiteMg9(SiO4)4F2
F Dollaseite-(Ce)(CaCe)(MgAlMg)F[Si2O7][SiO4](OH)
F NorbergiteMg3(SiO4)F2
F Parisite-(Ce)CaCe2(CO3)3F2
F Fluorbritholite-(Y)(Y,Ca)5(SiO4)3F
F Arrheniusite-(Ce)CaMg[(Ce7Y3)Ca5](SiO4)4(Si2B3AsO18)(BO3)F11
MgMagnesium
Mg Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Mg Cerite-(CeCa)(Ce7Ca2)◻Mg(SiO4)3(SiO3OH)4(OH)3
Mg ChondroditeMg5(SiO4)2F2
Mg ClinohumiteMg9(SiO4)4F2
Mg Dissakisite-(Ce)(CaCe)(AlAlMg)O[Si2O7][SiO4](OH)
Mg Dollaseite-(Ce)(CaCe)(MgAlMg)F[Si2O7][SiO4](OH)
Mg DolomiteCaMg(CO3)2
Mg NorbergiteMg3(SiO4)F2
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
Mg Tremolite◻Ca2Mg5(Si8O22)(OH)2
Mg Arrheniusite-(Ce)CaMg[(Ce7Y3)Ca5](SiO4)4(Si2B3AsO18)(BO3)F11
AlAluminium
Al Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Al Dissakisite-(Ce)(CaCe)(AlAlMg)O[Si2O7][SiO4](OH)
Al Dollaseite-(Ce)(CaCe)(MgAlMg)F[Si2O7][SiO4](OH)
Al PhlogopiteKMg3(AlSi3O10)(OH)2
SiSilicon
Si Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Si Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Si Cerite-(CeCa)(Ce7Ca2)◻Mg(SiO4)3(SiO3OH)4(OH)3
Si ChondroditeMg5(SiO4)2F2
Si ClinohumiteMg9(SiO4)4F2
Si Dissakisite-(Ce)(CaCe)(AlAlMg)O[Si2O7][SiO4](OH)
Si Dollaseite-(Ce)(CaCe)(MgAlMg)F[Si2O7][SiO4](OH)
Si Gadolinite-(Ce)(Ce,La,Nd,Y)2Fe2+Be2Si2O10
Si Gadolinite-(Y)Y2Fe2+Be2Si2O10
Si NorbergiteMg3(SiO4)F2
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si Tremolite◻Ca2Mg5(Si8O22)(OH)2
Si Fluorbritholite-(Y)(Y,Ca)5(SiO4)3F
Si Allanite Group(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
Si Arrheniusite-(Ce)CaMg[(Ce7Y3)Ca5](SiO4)4(Si2B3AsO18)(BO3)F11
SSulfur
S BismuthiniteBi2S3
S MolybdeniteMoS2
S PyriteFeS2
ClChlorine
Cl Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
KPotassium
K PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Ca Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Ca CalciteCaCO3
Ca Cerite-(CeCa)(Ce7Ca2)◻Mg(SiO4)3(SiO3OH)4(OH)3
Ca Dissakisite-(Ce)(CaCe)(AlAlMg)O[Si2O7][SiO4](OH)
Ca Dollaseite-(Ce)(CaCe)(MgAlMg)F[Si2O7][SiO4](OH)
Ca DolomiteCaMg(CO3)2
Ca Parisite-(Ce)CaCe2(CO3)3F2
Ca Tremolite◻Ca2Mg5(Si8O22)(OH)2
Ca Fluorbritholite-(Y)(Y,Ca)5(SiO4)3F
Ca Arrheniusite-(Ce)CaMg[(Ce7Y3)Ca5](SiO4)4(Si2B3AsO18)(BO3)F11
TiTitanium
Ti Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
FeIron
Fe Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Fe Gadolinite-(Ce)(Ce,La,Nd,Y)2Fe2+Be2Si2O10
Fe Gadolinite-(Y)Y2Fe2+Be2Si2O10
Fe MagnetiteFe2+Fe23+O4
Fe PyriteFeS2
AsArsenic
As Arrheniusite-(Ce)CaMg[(Ce7Y3)Ca5](SiO4)4(Si2B3AsO18)(BO3)F11
YYttrium
Y Gadolinite-(Ce)(Ce,La,Nd,Y)2Fe2+Be2Si2O10
Y Gadolinite-(Y)Y2Fe2+Be2Si2O10
Y Fluorbritholite-(Y)(Y,Ca)5(SiO4)3F
Y Arrheniusite-(Ce)CaMg[(Ce7Y3)Ca5](SiO4)4(Si2B3AsO18)(BO3)F11
MoMolybdenum
Mo MolybdeniteMoS2
LaLanthanum
La Gadolinite-(Ce)(Ce,La,Nd,Y)2Fe2+Be2Si2O10
CeCerium
Ce Bastnäsite-(Ce)Ce(CO3)F
Ce Cerite-(CeCa)(Ce7Ca2)◻Mg(SiO4)3(SiO3OH)4(OH)3
Ce Dissakisite-(Ce)(CaCe)(AlAlMg)O[Si2O7][SiO4](OH)
Ce Dollaseite-(Ce)(CaCe)(MgAlMg)F[Si2O7][SiO4](OH)
Ce Gadolinite-(Ce)(Ce,La,Nd,Y)2Fe2+Be2Si2O10
Ce Parisite-(Ce)CaCe2(CO3)3F2
Ce Arrheniusite-(Ce)CaMg[(Ce7Y3)Ca5](SiO4)4(Si2B3AsO18)(BO3)F11
NdNeodymium
Nd Gadolinite-(Ce)(Ce,La,Nd,Y)2Fe2+Be2Si2O10
BiBismuth
Bi BismuthiniteBi2S3

Other Regions, Features and Areas containing this locality


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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