Lindvikskollen-Kalstadgangen pegmatite, Kragerø, Telemark, Norway

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A large granite pegmatite body hosted in amphibolites and albitites ("kragerødite"). The main part of the pegmatite forms a dike about 500 m in length and 3o m wide.

Situated about 2 km W of the town Kragerø.

The pegmatite is a Ca-Ti-B-Y rich pegmatite and can be classified as a NYF pegmatite. It has been quarried extensively along its length. 2 of the most famous prospects/quarries are the Lindvikskollen quarry and Kalstadgangen. These are famous for their rare minerals. Mineral samples from these two are frequently just labelled "Lindvikskollen". The pegmatite with its quarries and prospects will now be included in Gea Norvegica, a Geopark.

References

- Andersen, O.(1931): Feltspat II. Forekomster i fylkene Buskerud og Telemark, i flere herreder i Aust-Agder og i Hidra i Vest-Agder. Norges Geologiske undersøkelse 128b, 1-109

- Bjørlykke, H. (1937): Mineral parageneses of some granite pegmatites near Kragerø, Southern Norway. Norsk Geologisk Tidsskrift 17, 1-16.

- Green, J. C. (1956): Geology of the Storkollen-Blankenberg area, Kragerø, Norway. Norsk Geologisk Tidsskrift 36, 89-140 + plate I.

- Larsen, K. E. (2008): Lindvikskollen-Kalstadgangen, Kragerø - en klassisk norsk granittpegmatitt. Norsk Bergverksmuseums Skrift 38, 37-44.

- Kolitsch, U., Husdal, T. A., Brandstätter, F. & Ertl, A. (2011) : New crystal-chemical data for members of the tourmaline group from Norway: occurences of fluor-schorl and luinaite-(OH). Norsk Bergverksmuseum Skrift. 46: 17- 24 [with an analysis of schorl from this pegmatite]

Mineral List

Mineral list contains entries from the region specified including sub-localities

Aeschynite-(Y) Albite 'Albite-Anorthite Series' 'Allanite' Anatase 'Apatite' Biotite Calcite Caysichite-(Y)

Chernovite-(Y) Euxenite-(Y) 'Fergusonite' Fluorapatite 'Gadolinite' Hellandite-(Y) (TL) Hellandite-(Yb) ? Hingganite-(Y) 'Hornblende'

Ilmenite Kainosite-(Y) Magnetite Microcline Muscovite Phenakite Pyrite 'Pyroxene Group' Quartz

'Scapolite' Schorl Tengerite-(Y) ? Thorite var: Orangite Titanite var: Yttrian Titanite Zircon var: Alvite

44 entries listed. 21 valid minerals. 1 type locality (valid mineral).

Localities in this Region

Norway Telemark Kragerø Lindvikskollen-Kalstadgangen pegmatite Kalstadgangen Lindvikskollen quarry