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Lillebukt Alkaline Complex, Stjernøya Island, Alta, Troms og Finnmark, Norwayi
Regional Level Types
Lillebukt Alkaline ComplexComplex
Stjernøya IslandIsland
AltaMunicipality
Troms og FinnmarkCounty
NorwayCountry

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Latitude & Longitude (WGS84):
70° 17' 32'' North , 22° 34' 27'' East
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Mindat Locality ID:
467896
Long-form identifier:
mindat:1:2:467896:3
GUID (UUID V4):
0


It is the largest of the alkaline complexes within the SIP and is hosted by layered metagabbros belonging to the intermediate stage of plutonic activity in the province. The development of the complex started with the emplacement of hornblende clinopyroxenite dykes followed by intrusions of monzonites, syenites, nepheline syenites, carbonatites and late nepheline syenite pegmatites. Mafic fenites derived from the layered gabbros and felsic fenites formed by metasomatism of early syenites and monzonites in the south constitute together a 500–1000 m wide zone around the central carbonatite intrusion.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

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

20 valid minerals.

Rock Types Recorded


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

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Aegirine
Formula: NaFe3+Si2O6
Albite
Formula: Na(AlSi3O8)
Albite var. Andesine
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
'Alkali Feldspar'
Anorthite
Formula: Ca(Al2Si2O8)
Anorthite var. Labradorite
Formula: (Ca,Na)[Al(Al,Si)Si2O8]
'Apatite'
Formula: Ca5(PO4)3A
'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Calcite
Formula: CaCO3
'Calcium Amphibole Subgroup'
Formula: AnCa2(C2+5-mC3+m)(Si8-(n+m)Al(n+m))W2
'Calcium Amphibole Subgroup var. Hornblende'
Formula: AnCa2(Z2+5-mZ3+m)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
'Clinopyroxene Subgroup'
Corundum
Formula: Al2O3
Diopside
Formula: CaMgSi2O6
Diopside var. Salite
Formula: CaMgSi2O6
Hastingsite
Formula: NaCa2(Fe2+4Fe3+)(Si6Al2)O22(OH)2
Hercynite
Formula: Fe2+Al2O4
'Hornblende Root Name Group'
Formula: ◻Ca2(C2+4C3+)(AlSi7O22)W2
Ilmenite
Formula: Fe2+TiO3
'K Feldspar'
'Magnesian hastingsite'
Magnetite
Formula: Fe2+Fe3+2O4
Magnetite var. Titanium-bearing Magnetite
Formula: Fe2+(Fe3+,Ti)2O4
Montmorillonite
Formula: (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Description: an alteration of nepheline consist of a mixture of montmorillonite and illite
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Description: an alteration of nepheline consist of a mixture of montmorillonite and illite
Muscovite var. Illite
Formula: K0.65Al2.0[Al0.65Si3.35O10](OH)2
Description: an alteration of nepheline consist of a mixture of montmorillonite and illite
Nepheline
Formula: Na3K(Al4Si4O16)
Palygorskite
Formula: ◻Al2Mg22Si8O20(OH)2(H2O)4 · 4H2O
Description: As mountain leatherlike aggregates together with montmorillonitic clay in fractures cutting the nepheline syenite
Pargasite
Formula: NaCa2(Mg4Al)(Si6Al2)O22(OH)2
Spinel
Formula: MgAl2O4
Stilpnomelane
Formula: K4Fe2+48[Si64Al8]O164(OH)52 · nH2O
Strontianite
Formula: SrCO3
Titanite
Formula: CaTiO(SiO4)
Zircon
Formula: Zr(SiO4)

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Hercynite4.BB.05Fe2+Al2O4
Magnetite4.BB.05Fe2+Fe3+2O4
Spinel4.BB.05MgAl2O4
Magnetite
var. Titanium-bearing Magnetite
4.BB.05Fe2+(Fe3+,Ti)2O4
Corundum4.CB.05Al2O3
Ilmenite4.CB.05Fe2+TiO3
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Strontianite5.AB.15SrCO3
Group 9 - Silicates
Zircon9.AD.30Zr(SiO4)
Titanite9.AG.15CaTiO(SiO4)
Diopside9.DA.15CaMgSi2O6
var. Salite9.DA.15CaMgSi2O6
Aegirine9.DA.25NaFe3+Si2O6
Hastingsite9.DE.15NaCa2(Fe2+4Fe3+)(Si6Al2)O22(OH)2
Pargasite9.DE.15NaCa2(Mg4Al)(Si6Al2)O22(OH)2
Muscovite
var. Illite
9.EC.15K0.65Al2.0[Al0.65Si3.35O10](OH)2
9.EC.15KAl2(AlSi3O10)(OH)2
Montmorillonite9.EC.40(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Palygorskite9.EE.20◻Al2Mg22Si8O20(OH)2(H2O)4 · 4H2O
Stilpnomelane9.EG.40K4Fe2+48[Si64Al8]O164(OH)52 · nH2O
Nepheline9.FA.05Na3K(Al4Si4O16)
Albite9.FA.35Na(AlSi3O8)
var. Andesine9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
Anorthite9.FA.35Ca(Al2Si2O8)
var. Labradorite9.FA.35(Ca,Na)[Al(Al,Si)Si2O8]
Unclassified
'Alkali Feldspar'-
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
'Calcium Amphibole Subgroup
var. Hornblende'
-AnCa2(Z2+5-mZ3+m)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
'Clinopyroxene Subgroup'-
'Hornblende Root Name Group'-◻Ca2(C2+4C3+)(AlSi7O22)W2
'K Feldspar'-
'Magnesian hastingsite'-
'Apatite'-Ca5(PO4)3A
'Calcium Amphibole Subgroup'-AnCa2(C2+5-mC3+m)(Si8-(n+m)Al(n+m))W2

List of minerals for each chemical element

HHydrogen
H BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
H HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
H Calcium Amphibole Subgroup var. HornblendeAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
H Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
H MuscoviteKAl2(AlSi3O10)(OH)2
H Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
H Palygorskite◻Al2Mg22Si8O20(OH)2(H2O)4 · 4H2O
H PargasiteNaCa2(Mg4Al)(Si6Al2)O22(OH)2
H StilpnomelaneK4Fe482+[Si64Al8]O164(OH)52 · nH2O
CCarbon
C CalciteCaCO3
C StrontianiteSrCO3
OOxygen
O AegirineNaFe3+Si2O6
O AlbiteNa(AlSi3O8)
O Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
O AnorthiteCa(Al2Si2O8)
O BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
O CalciteCaCO3
O CorundumAl2O3
O DiopsideCaMgSi2O6
O HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
O HercyniteFe2+Al2O4
O Calcium Amphibole Subgroup var. HornblendeAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
O Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
O IlmeniteFe2+TiO3
O Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
O MagnetiteFe2+Fe23+O4
O MuscoviteKAl2(AlSi3O10)(OH)2
O Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
O NephelineNa3K(Al4Si4O16)
O Palygorskite◻Al2Mg22Si8O20(OH)2(H2O)4 · 4H2O
O PargasiteNaCa2(Mg4Al)(Si6Al2)O22(OH)2
O SpinelMgAl2O4
O StilpnomelaneK4Fe482+[Si64Al8]O164(OH)52 · nH2O
O StrontianiteSrCO3
O TitaniteCaTiO(SiO4)
O Magnetite var. Titanium-bearing MagnetiteFe2+(Fe3+,Ti)2O4
O ZirconZr(SiO4)
O Hornblende Root Name Group◻Ca2(C42+C3+)(AlSi7O22)W2
O Diopside var. SaliteCaMgSi2O6
O ApatiteCa5(PO4)3A
FFluorine
F BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
F Calcium Amphibole Subgroup var. HornblendeAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
NaSodium
Na AegirineNaFe3+Si2O6
Na AlbiteNa(AlSi3O8)
Na Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Na HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
Na Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Na Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Na NephelineNa3K(Al4Si4O16)
Na PargasiteNaCa2(Mg4Al)(Si6Al2)O22(OH)2
MgMagnesium
Mg BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mg DiopsideCaMgSi2O6
Mg Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Mg Palygorskite◻Al2Mg22Si8O20(OH)2(H2O)4 · 4H2O
Mg PargasiteNaCa2(Mg4Al)(Si6Al2)O22(OH)2
Mg SpinelMgAl2O4
Mg Diopside var. SaliteCaMgSi2O6
AlAluminium
Al AlbiteNa(AlSi3O8)
Al Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Al AnorthiteCa(Al2Si2O8)
Al BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Al CorundumAl2O3
Al HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
Al HercyniteFe2+Al2O4
Al Calcium Amphibole Subgroup var. HornblendeAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
Al Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Al Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Al NephelineNa3K(Al4Si4O16)
Al Palygorskite◻Al2Mg22Si8O20(OH)2(H2O)4 · 4H2O
Al PargasiteNaCa2(Mg4Al)(Si6Al2)O22(OH)2
Al SpinelMgAl2O4
Al StilpnomelaneK4Fe482+[Si64Al8]O164(OH)52 · nH2O
Al Hornblende Root Name Group◻Ca2(C42+C3+)(AlSi7O22)W2
Al Calcium Amphibole SubgroupAnCa2(C2+5-mCm3+)(Si8-(n+m)Al(n+m))W2
SiSilicon
Si AegirineNaFe3+Si2O6
Si AlbiteNa(AlSi3O8)
Si Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Si AnorthiteCa(Al2Si2O8)
Si BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Si DiopsideCaMgSi2O6
Si HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
Si Calcium Amphibole Subgroup var. HornblendeAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
Si Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Si Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Si NephelineNa3K(Al4Si4O16)
Si Palygorskite◻Al2Mg22Si8O20(OH)2(H2O)4 · 4H2O
Si PargasiteNaCa2(Mg4Al)(Si6Al2)O22(OH)2
Si StilpnomelaneK4Fe482+[Si64Al8]O164(OH)52 · nH2O
Si TitaniteCaTiO(SiO4)
Si ZirconZr(SiO4)
Si Hornblende Root Name Group◻Ca2(C42+C3+)(AlSi7O22)W2
Si Diopside var. SaliteCaMgSi2O6
Si Calcium Amphibole SubgroupAnCa2(C2+5-mCm3+)(Si8-(n+m)Al(n+m))W2
PPhosphorus
P ApatiteCa5(PO4)3A
ClChlorine
Cl Calcium Amphibole Subgroup var. HornblendeAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
KPotassium
K BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
K Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
K MuscoviteKAl2(AlSi3O10)(OH)2
K NephelineNa3K(Al4Si4O16)
K StilpnomelaneK4Fe482+[Si64Al8]O164(OH)52 · nH2O
CaCalcium
Ca Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Ca AnorthiteCa(Al2Si2O8)
Ca CalciteCaCO3
Ca DiopsideCaMgSi2O6
Ca HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
Ca Calcium Amphibole Subgroup var. HornblendeAnCa2(Z2+5-mZm3+)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
Ca Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Ca Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Ca PargasiteNaCa2(Mg4Al)(Si6Al2)O22(OH)2
Ca TitaniteCaTiO(SiO4)
Ca Hornblende Root Name Group◻Ca2(C42+C3+)(AlSi7O22)W2
Ca Diopside var. SaliteCaMgSi2O6
Ca ApatiteCa5(PO4)3A
Ca Calcium Amphibole SubgroupAnCa2(C2+5-mCm3+)(Si8-(n+m)Al(n+m))W2
TiTitanium
Ti BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Ti IlmeniteFe2+TiO3
Ti TitaniteCaTiO(SiO4)
Ti Magnetite var. Titanium-bearing MagnetiteFe2+(Fe3+,Ti)2O4
FeIron
Fe AegirineNaFe3+Si2O6
Fe BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Fe HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
Fe HercyniteFe2+Al2O4
Fe IlmeniteFe2+TiO3
Fe MagnetiteFe2+Fe23+O4
Fe StilpnomelaneK4Fe482+[Si64Al8]O164(OH)52 · nH2O
Fe Magnetite var. Titanium-bearing MagnetiteFe2+(Fe3+,Ti)2O4
SrStrontium
Sr StrontianiteSrCO3
ZrZirconium
Zr ZirconZr(SiO4)

Geochronology

Mineralization age: Paleozoic : 539 ± 39 Ma to 402 ± 8 Ma

Important note: This table is based only on rock and mineral ages recorded on mindat.org for this locality and is not necessarily a complete representation of the geochronology, but does give an indication of possible mineralization events relevant to this locality. As more age information is added this table may expand in the future. A break in the table simply indicates a lack of data entered here, not necessarily a break in the geologic sequence. Grey background entries are from different, related, localities.

Geologic TimeRocks, Minerals and Events
Phanerozoic
 Paleozoic
  Devonian
   Early/Lower Devonian
ⓘ Nepheline-syenite (youngest age)402 ± 8 MaLillebukt Nepheline Mine, Lillebukt Alkaline Complex, Stjernøya Island, Alta, Troms og Finnmark, Norway
ⓘ Nepheline-syenite (oldest age)404 ± 9 MaLillebukt Nepheline Mine, Lillebukt Alkaline Complex, Stjernøya Island, Alta, Troms og Finnmark, Norway
    
   
  Cambrian
   Cambrian Series 2
ⓘ Metagabbro (youngest age)517 ± 61 MaLillebukt Nepheline Mine, Lillebukt Alkaline Complex, Stjernøya Island, Alta, Troms og Finnmark, Norway
ⓘ Clinopyroxenite (youngest age)521 ± 22 MaLillebukt Nepheline Mine, Lillebukt Alkaline Complex, Stjernøya Island, Alta, Troms og Finnmark, Norway
   Terreneuvian
ⓘ Zircon523 ± 2 MaLillebukt Nepheline Mine, Lillebukt Alkaline Complex, Stjernøya Island, Alta, Troms og Finnmark, Norway
ⓘ Metagabbro (oldest age)534 ± 8 MaLillebukt Nepheline Mine, Lillebukt Alkaline Complex, Stjernøya Island, Alta, Troms og Finnmark, Norway
ⓘ Clinopyroxenite (oldest age)539 ± 39 MaLillebukt Nepheline Mine, Lillebukt Alkaline Complex, Stjernøya Island, Alta, Troms og Finnmark, Norway

Localities in this Region

Other Regions, Features and Areas containing this locality

Eurasian PlateTectonic Plate
EuropeContinent
Norway

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References

 
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