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Store Kufjord, Seiland Island, Alta, Finnmark, Norwayi
Regional Level Types
Store KufjordGroup of Prospects
Seiland IslandIsland
AltaMunicipality
FinnmarkCounty
NorwayCountry

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Key
Latitude & Longitude (WGS84):
70° 21' 59'' North , 23° 7' 13'' East
Latitude & Longitude (decimal):
Locality type:
Group of Prospects
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Rafsbotn370 (2013)41.7km
Alta12,077 (2017)44.6km
Other/historical names associated with this locality:
Thorfjord; Thurfjord
Other Languages:
Northern Sami:
Stuora Vuođđovuotna, Álttá gielda, Finnmárku
Norwegian:
Store Kufjord zirkonskjerp, Alta, Finnmark, Norge


A large nepheline syenite dike at the eastern side of Store Kufjord, going east from the sea. It can be followed in its length for a couple of kms and is about 8-10 m wide when at the widest. Several prospects are found along this dike, one of them is the locality for the famous "Seiland zircons". This locality has been refered to as "close to Stjernsund" which geographically is located further SW.
The names Thorfjord (or Thurfjord) are misnomers.


The locality was first discovered by the english geologist David Roberts in 1973.
Between 1980-1988 a zircon bearing part of the dike was claimed for ilmenite (by Andreas Corneliusen and others). A large number of specimens with well developed, deep red zircon crystals was taken out and sold on mineral shows worldwide.
Zircon specimens have also been found at other localities at Seiland but not in the same quantity as from this locality.

Regions containing this locality

Eurasian PlateTectonic Plate
EuropeContinent
ScandinaviaRegion

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


5 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and 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:

'Albite-Anorthite Series'
Reference: Norges Geologiske Undersøkelse.(NGU)- industridatabase. Kufjorden Forekomst nr.320 i Alta (2012) kommune.
'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Reference: Weiss, S. (2011): Seiland, Norwegen- eine legendäre Zirkonfundstelle am Alta-Fjord, Finnmark. Lapis. 36 (11), 15-19
Ilmenite
Formula: Fe2+TiO3
Reference: Augsten, R. & Weiss, S. (2011). Mineralientouren nach Skandinavien (IV)."Seiland-Diamanten". Abentauer 423 km nördlich des Polarkreises. Lapis 36 (11), 20-25
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Augsten, R. & Weiss, S. (2011). Mineralientouren nach Skandinavien (IV)."Seiland-Diamanten". Abentauer 423 km nördlich des Polarkreises. Lapis 36 (11), 20-25
Nepheline
Formula: Na3K(Al4Si4O16)
Reference: Norges Geologiske Undersøkelse.(NGU)- industridatabase. Kufjorden Forekomst nr.320 i Alta (2012) kommune.
Sodalite
Formula: Na8(Al6Si6O24)Cl2
Reference: Augsten, R. & Weiss, S. (2011). Mineralientouren nach Skandinavien (IV)."Seiland-Diamanten". Abentauer 423 km nördlich des Polarkreises. Lapis 36 (11), 20-25
Zircon
Formula: Zr(SiO4)
Habit: Dominated by prism {100}, pyramids {101} and {301}
Colour: deep red
Description: Crystals up to 10 cm across
Reference: Eldjarn, K.(1982): Edel Zirkon fra Seiland, Finnmark. NAGS-nytt 9 (1),8-9; Weiss, S. (2011): Seiland, Norwegen- eine legendäre Zirkonfundstelle am Alta-Fjord, Finnmark. Lapis. 36 (11), 15-19

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Ilmenite4.CB.05Fe2+TiO3
Magnetite4.BB.05Fe2+Fe3+2O4
Group 9 - Silicates
Nepheline9.FA.05Na3K(Al4Si4O16)
Sodalite9.FB.10Na8(Al6Si6O24)Cl2
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
A2X3
Ilmenite4.3.5.1Fe2+TiO3
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework Feldspathoids and related species
Nepheline76.2.1.2Na3K(Al4Si4O16)
Sodalite76.2.3.1Na8(Al6Si6O24)Cl2
Unclassified Minerals, Mixtures, etc.
'Albite-Anorthite Series'-
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2

List of minerals for each chemical element

HHydrogen
H BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
OOxygen
O ZirconZr(SiO4)
O NephelineNa3K(Al4Si4O16)
O BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
O MagnetiteFe2+Fe23+O4
O IlmeniteFe2+TiO3
O SodaliteNa8(Al6Si6O24)Cl2
FFluorine
F BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
NaSodium
Na NephelineNa3K(Al4Si4O16)
Na SodaliteNa8(Al6Si6O24)Cl2
MgMagnesium
Mg BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
AlAluminium
Al NephelineNa3K(Al4Si4O16)
Al BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Al SodaliteNa8(Al6Si6O24)Cl2
SiSilicon
Si ZirconZr(SiO4)
Si NephelineNa3K(Al4Si4O16)
Si BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Si SodaliteNa8(Al6Si6O24)Cl2
ClChlorine
Cl SodaliteNa8(Al6Si6O24)Cl2
KPotassium
K NephelineNa3K(Al4Si4O16)
K BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
TiTitanium
Ti IlmeniteFe2+TiO3
FeIron
Fe BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Fe MagnetiteFe2+Fe23+O4
Fe IlmeniteFe2+TiO3
ZrZirconium
Zr ZirconZr(SiO4)

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Eldjarn, K. (1982): Edel Zirkon fra Seiland, Finnmark. NAGS-nytt: 9 (1): 8-9 (in norwegian)
Hætta, O.M. (1999): Beinbrudd på Seiland. Stein 26 (2): 51-53 [a reportage on a trip made by Vest-Finnmark Geological Society to the locality in 1998]
Weiss, S. (2011): Seiland, Norwegen- eine legendäre Zirkonfundstelle am Alta-Fjord, Finnmark. Lapis. 36 (11), 15-19
Augsten, R. & Weiss, S. (2011). Mineralientouren nach Skandinavien (IV)."Seiland-Diamanten". Abentauer 423 km nördlich des Polarkreises. Lapis 36 (11): 20-25
Geological Survey of Norway. The Industrial Mineral Database. Deposit Area 2012 - 320. Kufjorden. (Last updated 22. apr.2004)

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