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Fen Complex, Nome, Telemark, Norway
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Name(s) in local language(s): Fensfeltet, Nome kommune, Telemark fylke, Norge
 
Famous for its rare volcanic/meta-volcanic rocks:

Carbonatites: søvite (coarse-grained calcite carbonatite), rødberg (altered carbonatite with hematite stained granular calcite, dolomite and sometimes ankerite), rauhaugite (dolomite carbonatite), ringite (coars-grained carbonatite containing aegirine and alkali-feldspar).
Lamprophyres: damkjernite (melanocratic nepheline lamprophyre).
Ijolites: melteigite (melanocratic nepheline ijolite), hollaite (calcite-melteigite, consisting of pyroxene (55%), calcite and nepheline).
Other rocks: fenite (metasomatic rock composed of alkali feldspar, sodic pyroxene and/or alkali amphibole, sometimes monomineralic alkali feldspar rock), vibetoite (pyroxenite containing aboundant Ti-augite and hornblende with biotite, primary calcite, and occasional albite and nepheline).

Many of the rocks were first described by W. C. Brøgger in 1921.
Most areas of the complex are now protected because of its value to science, and collecting is prohibited!

Mineral List

Mineral list contains entries from the region specified including sub-localities
Amphibole Supergroup
Anatase
Andradite
var: Melanite
Ankerite
'Apatite'
Aragonite
Baryte
'Bastnäsite'
Bazzite
'Biotite'
Brucite
Calcite
Cancrinite
Chalcopyrite
'Chlorite Group'
'Clinopyroxene Subgroup'
'Columbite'
Corundum
Diaoyudaoite
Dolomite
Fergusonite-(Y) ?
Ferro-pargasite
Fersmite
Fluorapatite
Goethite
Hematite
Hercynite
var: Picotite

Hibonite
Ilmenite
Isokite
Kobeite-(Y)
Loparite-(Ce)
Maghemite
Magnetite
'Monazite'
Nepheline
Pargasite
'Parisite'
Parisite-(Ce)
Periclase ?
Perovskite ?
Perrierite-(Ce)
Phlogopite
'Psilomelane'
Pyrite
Pyrochlore Group
Pyrolusite
'Pyroxene Group'
Pyrrhotite
Quartz
Quartz
var: Smoky Quartz

Romanèchite
Rutile
Spinel
Synchysite-(Ce)
Tetraferriphlogopite
Thorianite
Thorite
Thortveitite
Titanite
Topaz
'Uranpyrochlore (of Hogarth 1977)' ?
Villiaumite
Zircon


78 entries listed. 51 valid minerals.

Localities in this Region

Norway
Norway

The above list 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

- Brøgger, W.C. (1921) Die Eruptivgesteine des Kristianiagebietes. IV. Das Fengebiet in Telemark, Norwegen. Skrifter udgit av Videnskabsselskabet i Kristiania. I. Math. Nat. Klasse. No.9, p. 1-408.

- Aubert, F.(1947): Identifisering av de Nb-Ta-førende mineraler i søvitt, og forsøk på deres magnetiske separasjon. Tidsskrift for kjemi, Bergvesen og Metallurgi. 7, 169-171

- Bjørlykke, (1953): Utnytting av Søvemalm. Tidsskrift for Kjemi, Bergvesen og Metallurgi. 13, 47-48.

- Sørum, H.(1955): Contribution to the mineralogy of Søve deposit. I. X-ray identification of accessory minerals. Det Konglige Norske Videnskabsselskap Forhandlinger, B 28, 112-119.

- Sørum, H.(1955): Contribution to the Mineralogy of the Søve Deposit. II. X-ray and thermal studies of the niobium minerals. Det Konglige Norske Videnskabsselskap Forhandlinger, B 28, 120-127

- Sæther, E.(1957): The alkaline rock province of the Fen area in southern Norway. Det Konglige Norske Videnskabsselskaps Skrifter 1957, 1, 150p.

- Barth,, T.F.W. & Ramberg, I.B. (1966): The Fen circular complex. In Tuttle, O.F. & Gittins, J.(eds). Carbonatites. Interscience, New York, USA. 225-257

- Åmli, R. (1977): Carbonatites, a possible source of Scandium as indicated by Sc-mineralization in the Fen peralkaline complex, Southern Norway. Economic Geology 72: 855-859

- Andersen, T. (1984) Secondary processes in carbonatites: petrology of "rødberg" (hematite-calcite-dolomite carbonatite) in the Fen central complex, Telemark (south Norway). Lithos: 17: 227-245.

- Andersen, T. (1986) Compositional variation of some rare earth minerals from the Fen complex (Telemark, SE Norway): implications for the mobility of rare earths in a carbonatite system. Mineralogical Magazine: 50: 503-509.

- Andersen, T. (1988) Evolution of peralkaline calcite carbonatite magmas. Experimentally determined trace and minor element partitioning in the Fen complex, southeast Norway. Lithos: 22: 99-112.

- Andersen, T. (1989): Carbonatite-related contact metasomatism in the Fen complex, Norway: effects and petrogenetic implications. Mineralogical Magazine. 53: 395-414

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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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