The locality is located about 1 km east of the Lake Gjerdingen, and consists as small outcrops/roadcuts beside the dirtroad from Lake Gjerdingen, close to Gjerdingenelva (river), going to Stryken station. It is a part of the "ekerite" (a soda granite) rich in zirconium, titanium and fluorine; locally occuring as an "elpidite-ekerite" and very locally as a "janhaugite-elpidite-ekerite".
Mineral List
61 entries listed. 56 valid minerals. 3 type localities (valid minerals). 1 erroneous literature entry.
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References
- Dietrich, R.V., Heier, K.S. & Taylor, S.R. (1965): Studies on the Igneous rock complex of the Oslo region. 20. Petrology and geochemistry of ekerite. Det Norske Videnskaps-Akademi i Oslo, Skrifter 1. Matematisk-Naturvidenskapelig Klasse. Ny serie, 19, 31s + 1 plate
- Sæbø, P. Chr. (1966): A short comment on some Norwegian mineral deposits within the Igneous Rock Complex of the Oslo Region. Norsk Geologisk Tidsskrift 46, 260-261
- Raade, G. (1972): Mineralogy of the miarolitic cavities in the plutonic rock of the Oslo Region. Mineralogical Record 3, 7-11.
- Raade, G. & Haug, J. (1980): Rare Fluorides from a soda granite in the Oslo Region, Norway. Mineralogical Record, 11, 83-91
- Raade, G. & Haug, J. (1981): Morphology and twinning of sellaite from Gjerdingen, Norway. Mineralogical Record 12, 231-232
- Eldjarn, K. (1981): Drusematerialer (sic!) fra Gjerdingen i Nordmarka. NAGS-nytt 8 (2), 6-10 (in norwegian)
- Eldjarn, K. (1981): Kryolitt fra Gjerdingen i Nordmarka. NAGS-nytt 8 (2), 11-12 (in norwegian)
- Raade, G. & Haug, J. (1982): Gjerdingen. Fundstelle seltener Mineralien in Norwegen. LAPIS 7 (6), 9-15
- Raade, G. & Mladeck, M. H. (1983): Janhaugite Na3Mn3Ti2SiO4O15(OH,F,O)3,a new mineral from Norway. American Mineralogist 68, 1216-1219.
- Ljøstad, O.T. (1988): Doyleitt. NAGS-nytt 15 (1-4), 23
- Raade, G., Ferraris, G., Gula. A. & Ivaldi, G. (2002): Gjerdingenite-Fe from Norway, a new mineral species in the labuntsovite group: description, crystal structure and twinning. Canadian Mineralogist 40, 1629-1639
- Raade, G., Chukanov N.V., Kolitsch U., Möckel S., Zadov, A.E., Pekov I.V. (2004): Gjerdingenite-Mn from Norway - a new mineral species in the labuntsovite group: descriptive data and crystal structure. European Journal of Mineralogy, 16, 979-987.
- Raade, G. (2005): Gjerdingen-ekeritten, en unik mineralforekomst. [The Gjerdingen-ekerite, a unique minerallocality]. Norsk Bergverksmuseum Skrift, 30, 14-18.
- Piscedda, V., Ferraris, G. & Raade, G. (2005): Single crystal x-ray diffraction study on neighborite (NaNgF3) from Gjerdingselva, Norway. Neues Jahrbuch für Mineralogie, Abhandlungen. 182: 23-29
- Raade, G. (2009): Plumbopyrochlore, ceriopyrochlore-(Ce), wulfenite and andradite from the Gjerdingen ekerite. Norsk Bergverksmuseum Skrift, 41, 25-30.
- Raade, G. (2011): A new nomenclature for the pyrochlore supergroup: Consequences for the naming of some Norwegian pyrochlore minerals. Norsk Bergverksmuseum Skrift. 46: 30-32
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