Tangen bruddet
Feldspar and quartz mine located 20 m north of Tangen farm, on the east side of the Kammerfosselven about 3-4 km west of the Kragerø town. The pegmatite which is hosted in amphibolites on the western slope of Mt. Sjåen was a irregular body about 40 m in length and 10-15 m wide.
Especially known for its large crystals of
phenakite.
Collecting at the site is prohibited by the owner.
Note to minerallist:
Sharp, crystals, often twinned, of columbites found in the cleavelandite zone has been known as columbite-(Mn) for nearly a century. However newer SEM/EDS analysis done on these has showed them to be columbite-(Fe). (Selbekk et al 2008)
Mineral List
30 entries listed. 20 valid minerals. 1 erroneous literature entry.
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
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References
- Hintze, C. (1897): Ueber krystallisirten Phenakit aus Schlesien. Zeitschrift für Kristallographie und Mineralogie. 28, 174-176. [p. 176 on phenakite from Tangen]
- Bäckstrom, H. (1898): Fenakit från Kragerø. Geologiska Föreningen i Stockholm Förhandlingar. 20, 295-303
- Andersen, O. (1924) Statsgeologenes innberetninger for 1923. I. Kragerø omegn. Norges Geologiske Undersøkelse 122. Årbok for 1923, p. 9- 18
- Bjørlykke, H. (1937): Mineral parageneses of some granite pegmatites near Kragerø, Southern Norway. Norsk Geologisk Tidsskrift, 17,1-16.
- Oftedal, I. (1963): Contributions to the mineralogy of Norway No 16. Danburite from the Kragerø District. Norsk Geologisk Tidsskrift 43, 73-74
- Green, J.C. (1956): Geology of the Storkollen-Blankenberg area, Kragerø, Norway. Norsk Geologisk Tidsskrift 36, 89-140
- Kristiansen, R. (1978): Lokkaitt, (Y,Ca)2(CO3)3 x 2H2O, ett nytt mineral for Norge. NAGS-nytt 5(4), 26-27 (in norwegian)
- Kristiansen, R. (1994): To nye mineraler for Norge- manganokolumbitt og hingganitt-(Yb). STEIN 21 (2), 88-93
- Ljøstad, O.T. (1994): Kamphaugitt-(Y)- det nyest beskrevne mineralet fra Norge. STEIN 21 (2), 143-144
- Rocks & Minerals: 15:77.
- Selbekk, R.S., Berg, H.-J.,Folvik, H. & Ellingsen, H.V. (2008): Mineraler i columbitt-tantalittgruppen fra Norge. Norsk Bergverksmuseum Skrift. 38, 33-36.
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