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Sompujärvi Reef, Penikat complex, Lapland, Finlandi
Regional Level Types
Sompujärvi ReefReef
Penikat complexComplex
LaplandRegion
FinlandCountry

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06072710017272040096159.jpg
Actinolite

Sompujärvi Reef, Penikat complex, Lapland, Finland
06072710017272040096159.jpg
Actinolite

Sompujärvi Reef, Penikat complex, Lapland, Finland
06072710017272040096159.jpg
Actinolite

Sompujärvi Reef, Penikat complex, Lapland, Finland
Latitude & Longitude (WGS84):
65° 58' 18'' North , 25° 13' 45'' East (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~0km
GRN:
N44E08
Type:
Reef
Köppen climate type:
Dfc : Subarctic climate
Mindat Locality ID:
33300
Long-form identifier:
mindat:1:2:33300:8
GUID (UUID V4):
0


PGE deposit in the Penikat ultramafic complex.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

38 valid minerals. 1 (TL) - type locality of valid minerals.

Detailed Mineral List:

ⓘ Actinolite
Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
ⓘ Anorthite
Formula: Ca(Al2Si2O8)
ⓘ Anorthite var. Bytownite
Formula: (Ca,Na)[Al(Al,Si)Si2O8]
ⓘ Anorthite var. Labradorite
Formula: (Ca,Na)[Al(Al,Si)Si2O8]
ⓘ Baddeleyite
Formula: ZrO2
ⓘ Baryte
Formula: BaSO4
ⓘ Bornite
Formula: Cu5FeS4
ⓘ Braggite
Formula: PdPt3S4
ⓘ Chalcocite
Formula: Cu2S
ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ Chromite
Formula: Fe2+Cr3+2O4
ⓘ Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
ⓘ Cuprorhodsite
Formula: (Cu1+0.5Fe3+0.5)Rh3+2S4
ⓘ Digenite
Formula: Cu9S5
ⓘ Enstatite
Formula: Mg2Si2O6
ⓘ Enstatite var. Bronzite
Formula: (Mg,Fe2+)2[SiO3]2
ⓘ Erlichmanite
Formula: OsS2
ⓘ 'Fayalite-Forsterite Series'
ⓘ Hollingworthite
Formula: (Rh,Pt,Pd)AsS
ⓘ Irarsite
Formula: (Ir,Ru,Rh,Pt)AsS
ⓘ Isomertieite
Formula: Pd11Sb2As2
ⓘ Keithconnite
Formula: Pd20Te7
ⓘ Keithconnite var. Lead-bearing Keithconnite
Formula: (Pd,Pb)20Te7
ⓘ Konderite
Formula: Cu3Pb(Rh,Pt,Ir)8S16
ⓘ Kotulskite
Formula: Pd(Te,Bi)2-x (x ≈ 0.4)
ⓘ Laflammeite (TL)
Formula: Pd3Pb2S2
Type Locality:
ⓘ Laurite
Formula: RuS2
ⓘ Malanite
Formula: Cu1+(Ir3+Pt4+)S4
ⓘ Mertieite
Formula: Pd8Sb2.5As0.5
ⓘ Millerite
Formula: NiS
ⓘ Native Copper
Formula: Cu
ⓘ Native Gold
Formula: Au
ⓘ Native Gold var. Electrum
Formula: (Au,Ag)
ⓘ Native Gold var. Palladium-bearing Gold
Formula: (Au,Pd)
ⓘ Native Silver
Formula: Ag
ⓘ 'Orthopyroxene Subgroup'
ⓘ Pentlandite
Formula: (NixFey)Σ9S8
ⓘ Pyrite
Formula: FeS2
ⓘ Roxbyite
Formula: Cu58S32
ⓘ Skaergaardite
Formula: PdCu
ⓘ Sperrylite
Formula: PtAs2
ⓘ Thorite
Formula: Th(SiO4)
ⓘ Titanite
Formula: CaTi(SiO4)O
ⓘ 'UM1999-16-O:PbPd'
Formula: Pd9PbO10
ⓘ 'UM1999-17:O:PbV'
Formula: Pb4V2O9 or Pb4(VO4)2O
ⓘ 'UM2005-01-As:PbPdSnTe'
Formula: Pd5(As,Te,Sn,Pb)2
ⓘ 'UM2005-35-VO:CaFePSiTh'
Formula: (Th,Ca)(VO4,SiO4,PO4)
ⓘ 'UM2005-//-E:CuPbPdPt'
Formula: (Pd,Pt)3(Pb,Cu)
ⓘ 'Unnamed (Fe-analogue of Konderite)'
Formula: (Cu,Ni,Fe)3+x(Fe,Pb)(Rh,Ir,Pd)8-xS16, where x < 0.5
ⓘ 'Unnamed (Rh-Ni Sulphide)'
Formula: Rh1-x(Ni,Fe,Cu)2+xS3
ⓘ Vysotskite
Formula: PdS
ⓘ Zircon
Formula: Zr(SiO4)
ⓘ Zvyagintsevite
Formula: Pd3Pb

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Copper1.AA.05Cu
ⓘNative Gold
var. Electrum		1.AA.05(Au,Ag)
ⓘ1.AA.05Au
ⓘNative Silver1.AA.05Ag
ⓘNative Gold
var. Palladium-bearing Gold		1.AA.05(Au,Pd)
ⓘZvyagintsevite1.AG.10Pd3Pb
ⓘSkaergaardite1.AG.45PdCu
Group 2 - Sulphides and Sulfosalts
ⓘMertieite2.AC.10bPd8Sb2.5As0.5
ⓘIsomertieite2.AC.15aPd11Sb2As2
ⓘChalcocite2.BA.05Cu2S
ⓘRoxbyite2.BA.05Cu58S32
ⓘDigenite2.BA.10Cu9S5
ⓘBornite2.BA.15Cu5FeS4
ⓘPentlandite2.BB.15(NixFey)Σ9S8
ⓘKeithconnite2.BC.20Pd20Te7
ⓘvar. Lead-bearing Keithconnite2.BC.20(Pd,Pb)20Te7
ⓘLaflammeite (TL)2.BC.60Pd3Pb2S2
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘKotulskite2.CC.05Pd(Te,Bi)2-x (x ≈ 0.4)
ⓘMillerite2.CC.20NiS
ⓘBraggite2.CC.35aPdPt3S4
ⓘVysotskite2.CC.35aPdS
ⓘCuprorhodsite2.DA.05(Cu1+0.5Fe3+0.5)Rh3+2S4
ⓘMalanite2.DA.05Cu1+(Ir3+Pt4+)S4
ⓘKonderite2.DA.20Cu3Pb(Rh,Pt,Ir)8S16
ⓘErlichmanite2.EB.05aOsS2
ⓘLaurite2.EB.05aRuS2
ⓘPyrite2.EB.05aFeS2
ⓘSperrylite2.EB.05aPtAs2
ⓘHollingworthite2.EB.25(Rh,Pt,Pd)AsS
ⓘIrarsite2.EB.25(Ir,Ru,Rh,Pt)AsS
Group 4 - Oxides and Hydroxides
ⓘChromite4.BB.05Fe2+Cr3+2O4
ⓘBaddeleyite4.DE.35ZrO2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘBaryte7.AD.35BaSO4
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ'UM2005-35-VO:CaFePSiTh'8.AD.50(Th,Ca)(VO4,SiO4,PO4)
ⓘ'UM1999-17:O:PbV'8.FA.15Pb4V2O9 or Pb4(VO4)2O
Group 9 - Silicates
ⓘThorite9.AD.30Th(SiO4)
ⓘZircon9.AD.30Zr(SiO4)
ⓘTitanite9.AG.15CaTi(SiO4)O
ⓘEnstatite9.DA.05Mg2Si2O6
ⓘvar. Bronzite9.DA.05(Mg,Fe2+)2[SiO3]2
ⓘActinolite9.DE.10◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
ⓘClinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
ⓘAnorthite9.FA.35Ca(Al2Si2O8)
ⓘvar. Bytownite9.FA.35(Ca,Na)[Al(Al,Si)Si2O8]
ⓘvar. Labradorite9.FA.35(Ca,Na)[Al(Al,Si)Si2O8]
Unclassified
ⓘ'UM1999-16-O:PbPd'-Pd9PbO10
ⓘ'Fayalite-Forsterite Series'-
ⓘ'Orthopyroxene Subgroup'-
ⓘ'UM2005-//-E:CuPbPdPt'-(Pd,Pt)3(Pb,Cu)
ⓘ'Unnamed (Rh-Ni Sulphide)'-Rh1-x(Ni,Fe,Cu)2+xS3
ⓘ'Unnamed (Fe-analogue of Konderite)'-(Cu,Ni,Fe)3+x(Fe,Pb)(Rh,Ir,Pd)8-xS16, where x < 0.5
ⓘ'UM2005-01-As:PbPdSnTe'-Pd5(As,Te,Sn,Pb)2

List of minerals for each chemical element

HHydrogen
Hⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Hⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
OOxygen
Oⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Oⓘ AnorthiteCa(Al2Si2O8)
Oⓘ BaddeleyiteZrO2
Oⓘ BaryteBaSO4
Oⓘ Anorthite var. Bytownite(Ca,Na)[Al(Al,Si)Si2O8]
Oⓘ ChromiteFe2+Cr23+O4
Oⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Oⓘ EnstatiteMg2Si2O6
Oⓘ Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Oⓘ ThoriteTh(SiO4)
Oⓘ TitaniteCaTi(SiO4)O
Oⓘ ZirconZr(SiO4)
Oⓘ Enstatite var. Bronzite(Mg,Fe2+)2[SiO3]2
Oⓘ UM1999-16-O:PbPdPd9PbO10
Oⓘ UM1999-17:O:PbVPb4V2O9 or Pb4(VO4)2O
Oⓘ Fayalite-Forsterite Series
Oⓘ UM2005-35-VO:CaFePSiTh(Th,Ca)(VO4,SiO4,PO4)
NaSodium
Naⓘ Anorthite var. Bytownite(Ca,Na)[Al(Al,Si)Si2O8]
Naⓘ Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
MgMagnesium
Mgⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Mgⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Mgⓘ EnstatiteMg2Si2O6
Mgⓘ Enstatite var. Bronzite(Mg,Fe2+)2[SiO3]2
Mgⓘ Fayalite-Forsterite Series
AlAluminium
Alⓘ AnorthiteCa(Al2Si2O8)
Alⓘ Anorthite var. Bytownite(Ca,Na)[Al(Al,Si)Si2O8]
Alⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Alⓘ Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
SiSilicon
Siⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Siⓘ AnorthiteCa(Al2Si2O8)
Siⓘ Anorthite var. Bytownite(Ca,Na)[Al(Al,Si)Si2O8]
Siⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Siⓘ EnstatiteMg2Si2O6
Siⓘ Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Siⓘ ThoriteTh(SiO4)
Siⓘ TitaniteCaTi(SiO4)O
Siⓘ ZirconZr(SiO4)
Siⓘ Enstatite var. Bronzite(Mg,Fe2+)2[SiO3]2
Siⓘ Fayalite-Forsterite Series
Siⓘ UM2005-35-VO:CaFePSiTh(Th,Ca)(VO4,SiO4,PO4)
PPhosphorus
Pⓘ UM2005-35-VO:CaFePSiTh(Th,Ca)(VO4,SiO4,PO4)
SSulfur
Sⓘ BaryteBaSO4
Sⓘ BorniteCu5FeS4
Sⓘ BraggitePdPt3S4
Sⓘ ChalcopyriteCuFeS2
Sⓘ ChalcociteCu2S
Sⓘ Cuprorhodsite(Cu1+0.5Fe3+0.5)Rh23+S4
Sⓘ DigeniteCu9S5
Sⓘ ErlichmaniteOsS2
Sⓘ Hollingworthite(Rh,Pt,Pd)AsS
Sⓘ Irarsite(Ir,Ru,Rh,Pt)AsS
Sⓘ KonderiteCu3Pb(Rh,Pt,Ir)8S16
Sⓘ LauriteRuS2
Sⓘ MalaniteCu1+(Ir3+Pt4+)S4
Sⓘ MilleriteNiS
Sⓘ Pentlandite(NixFey)Σ9S8
Sⓘ PyriteFeS2
Sⓘ RoxbyiteCu58S32
Sⓘ VysotskitePdS
Sⓘ LaflammeitePd3Pb2S2
Sⓘ Unnamed (Rh-Ni Sulphide)Rh1-x(Ni,Fe,Cu)2+xS3
Sⓘ Unnamed (Fe-analogue of Konderite)(Cu,Ni,Fe)3+x(Fe,Pb)(Rh,Ir,Pd)8-xS16, where x < 0.5
CaCalcium
Caⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Caⓘ AnorthiteCa(Al2Si2O8)
Caⓘ Anorthite var. Bytownite(Ca,Na)[Al(Al,Si)Si2O8]
Caⓘ Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Caⓘ TitaniteCaTi(SiO4)O
Caⓘ UM2005-35-VO:CaFePSiTh(Th,Ca)(VO4,SiO4,PO4)
TiTitanium
Tiⓘ TitaniteCaTi(SiO4)O
VVanadium
Vⓘ UM1999-17:O:PbVPb4V2O9 or Pb4(VO4)2O
Vⓘ UM2005-35-VO:CaFePSiTh(Th,Ca)(VO4,SiO4,PO4)
CrChromium
Crⓘ ChromiteFe2+Cr23+O4
FeIron
Feⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Feⓘ BorniteCu5FeS4
Feⓘ ChalcopyriteCuFeS2
Feⓘ ChromiteFe2+Cr23+O4
Feⓘ Cuprorhodsite(Cu1+0.5Fe3+0.5)Rh23+S4
Feⓘ Pentlandite(NixFey)Σ9S8
Feⓘ PyriteFeS2
Feⓘ Enstatite var. Bronzite(Mg,Fe2+)2[SiO3]2
Feⓘ Fayalite-Forsterite Series
Feⓘ Unnamed (Rh-Ni Sulphide)Rh1-x(Ni,Fe,Cu)2+xS3
Feⓘ Unnamed (Fe-analogue of Konderite)(Cu,Ni,Fe)3+x(Fe,Pb)(Rh,Ir,Pd)8-xS16, where x < 0.5
NiNickel
Niⓘ MilleriteNiS
Niⓘ Pentlandite(NixFey)Σ9S8
Niⓘ Unnamed (Rh-Ni Sulphide)Rh1-x(Ni,Fe,Cu)2+xS3
Niⓘ Unnamed (Fe-analogue of Konderite)(Cu,Ni,Fe)3+x(Fe,Pb)(Rh,Ir,Pd)8-xS16, where x < 0.5
CuCopper
Cuⓘ BorniteCu5FeS4
Cuⓘ ChalcopyriteCuFeS2
Cuⓘ ChalcociteCu2S
Cuⓘ Cuprorhodsite(Cu1+0.5Fe3+0.5)Rh23+S4
Cuⓘ Native CopperCu
Cuⓘ DigeniteCu9S5
Cuⓘ KonderiteCu3Pb(Rh,Pt,Ir)8S16
Cuⓘ MalaniteCu1+(Ir3+Pt4+)S4
Cuⓘ RoxbyiteCu58S32
Cuⓘ SkaergaarditePdCu
Cuⓘ UM2005-//-E:CuPbPdPt(Pd,Pt)3(Pb,Cu)
Cuⓘ Unnamed (Rh-Ni Sulphide)Rh1-x(Ni,Fe,Cu)2+xS3
Cuⓘ Unnamed (Fe-analogue of Konderite)(Cu,Ni,Fe)3+x(Fe,Pb)(Rh,Ir,Pd)8-xS16, where x < 0.5
AsArsenic
Asⓘ Hollingworthite(Rh,Pt,Pd)AsS
Asⓘ Irarsite(Ir,Ru,Rh,Pt)AsS
Asⓘ IsomertieitePd11Sb2As2
Asⓘ MertieitePd8Sb2.5As0.5
Asⓘ SperrylitePtAs2
Asⓘ UM2005-01-As:PbPdSnTePd5(As,Te,Sn,Pb)2
ZrZirconium
Zrⓘ BaddeleyiteZrO2
Zrⓘ ZirconZr(SiO4)
RuRuthenium
Ruⓘ Irarsite(Ir,Ru,Rh,Pt)AsS
Ruⓘ LauriteRuS2
RhRhodium
Rhⓘ Cuprorhodsite(Cu1+0.5Fe3+0.5)Rh23+S4
Rhⓘ Hollingworthite(Rh,Pt,Pd)AsS
Rhⓘ Irarsite(Ir,Ru,Rh,Pt)AsS
Rhⓘ KonderiteCu3Pb(Rh,Pt,Ir)8S16
Rhⓘ Unnamed (Rh-Ni Sulphide)Rh1-x(Ni,Fe,Cu)2+xS3
Rhⓘ Unnamed (Fe-analogue of Konderite)(Cu,Ni,Fe)3+x(Fe,Pb)(Rh,Ir,Pd)8-xS16, where x < 0.5
PdPalladium
Pdⓘ BraggitePdPt3S4
Pdⓘ Hollingworthite(Rh,Pt,Pd)AsS
Pdⓘ IsomertieitePd11Sb2As2
Pdⓘ KeithconnitePd20Te7
Pdⓘ KotulskitePd(Te,Bi)2-x (x ≈ 0.4)
Pdⓘ MertieitePd8Sb2.5As0.5
Pdⓘ VysotskitePdS
Pdⓘ ZvyagintsevitePd3Pb
Pdⓘ UM1999-16-O:PbPdPd9PbO10
Pdⓘ LaflammeitePd3Pb2S2
Pdⓘ Native Gold var. Palladium-bearing Gold(Au,Pd)
Pdⓘ SkaergaarditePdCu
Pdⓘ UM2005-//-E:CuPbPdPt(Pd,Pt)3(Pb,Cu)
Pdⓘ Keithconnite var. Lead-bearing Keithconnite(Pd,Pb)20Te7
Pdⓘ Unnamed (Fe-analogue of Konderite)(Cu,Ni,Fe)3+x(Fe,Pb)(Rh,Ir,Pd)8-xS16, where x < 0.5
Pdⓘ UM2005-01-As:PbPdSnTePd5(As,Te,Sn,Pb)2
AgSilver
Agⓘ Native Gold var. Electrum(Au,Ag)
Agⓘ Native SilverAg
SnTin
Snⓘ UM2005-01-As:PbPdSnTePd5(As,Te,Sn,Pb)2
SbAntimony
Sbⓘ IsomertieitePd11Sb2As2
Sbⓘ MertieitePd8Sb2.5As0.5
TeTellurium
Teⓘ KeithconnitePd20Te7
Teⓘ KotulskitePd(Te,Bi)2-x (x ≈ 0.4)
Teⓘ Keithconnite var. Lead-bearing Keithconnite(Pd,Pb)20Te7
Teⓘ UM2005-01-As:PbPdSnTePd5(As,Te,Sn,Pb)2
BaBarium
Baⓘ BaryteBaSO4
OsOsmium
Osⓘ ErlichmaniteOsS2
IrIridium
Irⓘ Irarsite(Ir,Ru,Rh,Pt)AsS
Irⓘ KonderiteCu3Pb(Rh,Pt,Ir)8S16
Irⓘ MalaniteCu1+(Ir3+Pt4+)S4
Irⓘ Unnamed (Fe-analogue of Konderite)(Cu,Ni,Fe)3+x(Fe,Pb)(Rh,Ir,Pd)8-xS16, where x < 0.5
PtPlatinum
Ptⓘ BraggitePdPt3S4
Ptⓘ Hollingworthite(Rh,Pt,Pd)AsS
Ptⓘ Irarsite(Ir,Ru,Rh,Pt)AsS
Ptⓘ KonderiteCu3Pb(Rh,Pt,Ir)8S16
Ptⓘ MalaniteCu1+(Ir3+Pt4+)S4
Ptⓘ SperrylitePtAs2
Ptⓘ UM2005-//-E:CuPbPdPt(Pd,Pt)3(Pb,Cu)
AuGold
Auⓘ Native Gold var. Electrum(Au,Ag)
Auⓘ Native GoldAu
Auⓘ Native Gold var. Palladium-bearing Gold(Au,Pd)
PbLead
Pbⓘ KonderiteCu3Pb(Rh,Pt,Ir)8S16
Pbⓘ ZvyagintsevitePd3Pb
Pbⓘ UM1999-16-O:PbPdPd9PbO10
Pbⓘ UM1999-17:O:PbVPb4V2O9 or Pb4(VO4)2O
Pbⓘ LaflammeitePd3Pb2S2
Pbⓘ UM2005-//-E:CuPbPdPt(Pd,Pt)3(Pb,Cu)
Pbⓘ Keithconnite var. Lead-bearing Keithconnite(Pd,Pb)20Te7
Pbⓘ Unnamed (Fe-analogue of Konderite)(Cu,Ni,Fe)3+x(Fe,Pb)(Rh,Ir,Pd)8-xS16, where x < 0.5
Pbⓘ UM2005-01-As:PbPdSnTePd5(As,Te,Sn,Pb)2
BiBismuth
Biⓘ KotulskitePd(Te,Bi)2-x (x ≈ 0.4)
ThThorium
Thⓘ ThoriteTh(SiO4)
Thⓘ UM2005-35-VO:CaFePSiTh(Th,Ca)(VO4,SiO4,PO4)

Localities in this Region

Finland

Other Regions, Features and Areas containing this locality

Baltic Shield (Fennoscandian Shield)Shield
Eurasian PlateTectonic Plate
EuropeContinent

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

Halkoaho, T.A.A., Alapaieti, T.T., and Lahtinen, J.J. (1989a) The Sompujärvi PGE mineralization in the Penikat layered intrusion, Northern Finland. In Early Proterozoic layered intrusions in the northeastern part of the Fennoscandian Shield (T. Alapieti, Editor). Fifth International Platinum Symposium, Guide to the Post-Symposium Field Trip, Geol. Survey of Finland, Guide 29: 71-92.
Halkoaho, T.A.A., Alapaieti, T.T., and Lahtinen, J.J. (1989b) The Sompujärvi PGE mineralization in the Kirakkajuppura area. Descriptions of Post-Symposium Field Excursion Sites. Site 6. In Early Proterozoic Layered Intrusions in the Northeastern Part of the Fennoscandian Shield (T Alapieti, Editor). Fifth International Platinum Symposium, Guide to the Post-Smposium Field Trip, Geol. Survey of Finland, Guide 29: 212-216.
Halkoaho, T. A. A., Alapieti, T. T., Lahtinen, J. J. (1990) The Sompujärvi PGE reef in the Penikat layered intrusion, northern Finland. Mineralogy and Petrology, 42 (1). 39-55 doi:10.1007/bf01162683
Halkoaho, T.A.A. (1993) The Sompujärvi and Ala-Penikka PGE reefs in the Penikat layered intrusion, northern Finland: implications for PGE reef-forming processes. Acta Univ. Oul. A249, University of Oulu, Oulu, Finland.
www.gsf.fi (n.d.) http://www.gsf.fi/explor/pgeweb/penikat/sompuj_pge_reef.htm
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To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
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