Høydalen, Tørdal, Drangedal kommune, Telemark fylke, Norge
The Høydalen locality consists of 2 separate amazonite pegmatite dykes, which is situated a few hundred meters apart. The pegmatites are hosted in a precambrian metamorphosed gabbroic rock. Both pegmatite dykes has been worked as 2 different quarries; the upper and lower quarries. Lepidolite was mined here in the period 1941-43. Occasional blasting during the years has revealed several mineral species. It is the type locality of tveitite-(Y). For a period the quarries were opened as a touristic collecting site with an entrance fee.
The quarries are now abandoned. Collecting at dumps is not allowed without permission from the landowner!
Mineral List
51 entries listed. 42 valid minerals. 1 type locality (valid mineral).
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References
- Oftedal, I. (1942): Lepidolit-og tinnsteinsførende pegmatitt i Tørdal, Telemark. Norske Geologisk Tidsskrift 22: 1-14
- Sverdrup, T.L., Sæbø,P.Chr. & Bryn, K.Ö. (1965): Contribution to the Mineralogy of Norway No. 31. Tysonite (fluocerite), a new mineral for Norway. Norsk Geologisk Tidsskrift 45: 177-188
- Sverdrup, T. L. (1968): Contributions to the Mineralogy of Norway No. 37. Yttrofluorite-yttrocerite-cerfluorite in norwegian pegmatites. Norsk Geologisk Tidsskrift 48: 245-252
- Bergstøl, S.; Jensen, B.B. & Neumann, H. (1977): Tveitite, a new calcium yttrium fluoride. LITHOS 10: 81-87
- Ash, L.A., Evans, S. & Hiorns, A.G. (1987): Cation ordering in lepidolite and biotite studied by x-ray photoelectron diffraction. Clay Minerals (1987) 22, 375-386 [material from Høydalen used in the study]
- Raade, Sæbø, Austrheim & Kristiansen (1993): Kuliokite-(Y) and its alteration products kainosite-(Y) and kamphaugite-(Y) from granite pegmatite in Tørdal, Norway, European Journal of Mineralogy: 5: 691-698
- Ljøstad, O.T. (1994): Kamphaugitt-(Y)- det nyest beskrevne mineralet fra Norge. STEIN 21 (2), 143-144
- Kristiansen, R. (1998a): Høydalen Litium-pegmatitt-Tørdal i Telemark. Bergverksmuseets Skrift 14, 17-28
- Kristiansen, R. (1998b): Høydalen Litium-pegmatitt-Tørdal i Telemark. STEIN 25 (4), 21-30
- Kristiansen, R. (2008): Nye mineralfunn i Norge. STEIN 35 (1): 17-21 [on the find of bazzite]
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