(Høydalen, Tørdal)
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!
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): Yttrofluorite-yttrocerite-cerfluorite in Norwegian pegmatites. Contributions to the mineralogy of Norway, No 37. Norsk Geologsk Tidskrift 48: 245-252
- Bergstøl, S.; Jensen, B.B. & Neumann, H. (1977): Tveitite, a new calcium yttrium fluoride. LITHOS 10: 81-87
- 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]
Mineral List:49 entries listed. 40 valid minerals. 1 type locality (valid mineral).
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