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Store Kufjord, Alta, Troms og Finnmark, Norwayi
| Regional Level Types | |
|---|---|
| Store Kufjord | Group of Prospects |
| Alta | Municipality |
| Troms og Finnmark | County |
| Norway | Country |
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Latitude & Longitude (WGS84):
70° 21' 59'' North , 23° 7' 13'' East
Latitude & Longitude (decimal):
Type:
Group of Prospects
Köppen climate type:
Other/historical names associated with this locality:
Thorfjord; Thurfjord
Other Languages:
Northern Sami:
Stuora Vuođđovuotna, Álttá gielda, Romsa ja Finnmárku, Norga
Norwegian:
Store Kufjord zirkonskjerp, Alta, Troms og 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 its widest. Several prospects are found along this dike; one of them is the locality for the famous "Seiland zircons". This locality has been referred 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 and 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 were taken out and sold at mineral shows worldwide.
Zircon specimens have also been found at other localities at Seiland but not in the same quantity as from this locality.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
5 valid minerals.
Rock Types Recorded
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ 'Amphibole Supergroup' Formula: AB2C5(T8O22)W2 References: |
| ⓘ 'Biotite' Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| ⓘ 'Hornblende Root Name Group' Formula: ◻Ca2(C2+4C3+)(AlSi7O22)W2 |
| ⓘ Ilmenite Formula: Fe2+TiO3 |
| ⓘ Magnetite Formula: Fe2+Fe3+2O4 |
| ⓘ Nepheline Formula: Na3K(Al4Si4O16) |
| ⓘ 'Plagioclase' Formula: (Na,Ca)[(Si,Al)AlSi2]O8 |
| ⓘ Sodalite Formula: Na4(Si3Al3)O12Cl |
| ✪ Zircon Formula: Zr(SiO4) Habit: Dominated by prism {100}, pyramids {101} and {301} Colour: deep red Description: Crystals up to 10 cm across |
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| ⓘ | Ilmenite | 4.CB.05 | Fe2+TiO3 |
| Group 9 - Silicates | |||
| ⓘ | Zircon | 9.AD.30 | Zr(SiO4) |
| ⓘ | Nepheline | 9.FA.05 | Na3K(Al4Si4O16) |
| ⓘ | Sodalite | 9.FB.10 | Na4(Si3Al3)O12Cl |
| Unclassified | |||
| ⓘ | 'Amphibole Supergroup' | - | AB2C5(T8O22)W2 |
| ⓘ | 'Biotite' | - | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| ⓘ | 'Hornblende Root Name Group' | - | ◻Ca2(C2+4C3+)(AlSi7O22)W2 |
| ⓘ | 'Plagioclase' | - | (Na,Ca)[(Si,Al)AlSi2]O8 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| O | Oxygen | |
| O | ⓘ Amphibole Supergroup | AB2C5(T8O22)W2 |
| O | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| O | ⓘ Ilmenite | Fe2+TiO3 |
| O | ⓘ Magnetite | Fe2+Fe23+O4 |
| O | ⓘ Nepheline | Na3K(Al4Si4O16) |
| O | ⓘ Sodalite | Na4(Si3Al3)O12Cl |
| O | ⓘ Zircon | Zr(SiO4) |
| O | ⓘ Hornblende Root Name Group | ◻Ca2(C42+C3+)(AlSi7O22)W2 |
| O | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| F | Fluorine | |
| F | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Na | Sodium | |
| Na | ⓘ Nepheline | Na3K(Al4Si4O16) |
| Na | ⓘ Sodalite | Na4(Si3Al3)O12Cl |
| Na | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Mg | Magnesium | |
| Mg | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Al | Aluminium | |
| Al | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Al | ⓘ Nepheline | Na3K(Al4Si4O16) |
| Al | ⓘ Sodalite | Na4(Si3Al3)O12Cl |
| Al | ⓘ Hornblende Root Name Group | ◻Ca2(C42+C3+)(AlSi7O22)W2 |
| Al | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Si | Silicon | |
| Si | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Si | ⓘ Nepheline | Na3K(Al4Si4O16) |
| Si | ⓘ Sodalite | Na4(Si3Al3)O12Cl |
| Si | ⓘ Zircon | Zr(SiO4) |
| Si | ⓘ Hornblende Root Name Group | ◻Ca2(C42+C3+)(AlSi7O22)W2 |
| Si | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Cl | Chlorine | |
| Cl | ⓘ Sodalite | Na4(Si3Al3)O12Cl |
| K | Potassium | |
| K | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| K | ⓘ Nepheline | Na3K(Al4Si4O16) |
| Ca | Calcium | |
| Ca | ⓘ Hornblende Root Name Group | ◻Ca2(C42+C3+)(AlSi7O22)W2 |
| Ca | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Ti | Titanium | |
| Ti | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Ti | ⓘ Ilmenite | Fe2+TiO3 |
| Fe | Iron | |
| Fe | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Fe | ⓘ Ilmenite | Fe2+TiO3 |
| Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
| Zr | Zirconium | |
| Zr | ⓘ Zircon | Zr(SiO4) |
Other Databases
| Link to Geological Survey of Norway: | 7070 |
|---|
Other Regions, Features and Areas containing this locality
Eurasian PlateTectonic Plate
- CaledonidesOrogenic Belt
EuropeContinent
Norway
- ⭔FinnmarkCounty
- Troms og Finnmark
- Seiland IslandIsland
ScandinaviaRegion
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References
Eldjarn, Knut (1982) Edel zirkon fra Seiland, Finnmark [Gem zircon from Seiland, Finnmark]. NAGS-NYTT, 9 (1) 8-9
Hætta, Odd Mathis (1999) Beinbrudd på Seiland, in Beryllium-mineraler i Norge. STEIN. Nordisk magasin for populær geologi, 26 (2) 51-53 a reportage on a trip made by Vest-Finnmark Geological Society to the locality in 1998
Store Kufjord, Alta, Troms og Finnmark, Norway