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Ula pegmatite, Ula, Tjølling, Larvik, Vestfold, Norway
Ula pegmatitten, Ula, Tjølling, Larvik kommune, Vestfold fylke, Norge
The syenite pegmatite locality at Ula became known in the late 1880s because of its occurrence of beautifully schillerising feldspar. The Ula locality includes two pegmatite dikes, one of which is the classic "moonstone" locality. The main pegmatite dike is about 1 m thick. The main mineral in the syenite pegmatites at Ula is a grey cryptoperthite which occurs in individuals up to 20 cm long and often shows sky-blue to greenish yellow schillerising colours. The main locality was protected by law 16.11.1984 as a Geological heritage site (Naturminne)
Mineral List
| Bastnäsite-(Ce) Fluorapatite Magnetite | Microcline 'Moonstone' | 'Perthite var: Cryptoperthite' Pyrochlore Group Zircon |
9 entries listed. 6 valid minerals. 1 erroneous literature entry.
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References
- Brøgger, W.C. (1890): Die Mineralien der Syenitpegmatitgänge der südnorwegischen Augit-und Nephelinsyenite. Zeitschrift für Kristallographie und Mineralogie 16. 663 pp [p. 543]
- Oftedahl, C. (1948): Studies on the igneous rock complex of the Oslo region. IX. The Feldspars. Skrifter utgitt av Det Norske Videnskaps-. Akademi i Oslo, I. Mat.-Naturv. Klasse 1948, no.3. 71s. [with a note on the Ula feldspar]
- Berge, S. A. (1991): Ula månesteinsforekomst, Tjølling, Larvik, Vestfold. Unpublished guide. Mai 1991
- Oftedahl, C. (1948): Studies on the igneous rock complex of the Oslo region. IX. The Feldspars. Skrifter utgitt av Det Norske Videnskaps-. Akademi i Oslo, I. Mat.-Naturv. Klasse 1948, no.3. 71s. [with a note on the Ula feldspar]
- Berge, S. A. (1991): Ula månesteinsforekomst, Tjølling, Larvik, Vestfold. Unpublished guide. Mai 1991
External Links
http://home.c2i.net/aolarsen/Pegmatites.htm
http://dnweb12.dirnat.no/nbinnsyn/asp/faktaark.asp?iid=VV00001137
http://dnweb12.dirnat.no/nbinnsyn/asp/faktaark.asp?iid=VV00001137
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