Mindat Logo

Ula pegmatite, Ula, Tjølling, Larvik, Vestfold, Norway

Photo: ØT
Latitude: 59°1'26"N
Longitude: 10°10'58"E
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'
Orthoclase
'Perthite
var: Cryptoperthite'

Pyrochlore Group
Zircon


9 entries listed. 6 valid minerals. 1 erroneous literature entry.

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

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 Unpublished guide.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

External Links


This page is currently not sponsored. To sponsor this page click here.


Mineral and/or Locality
Search Google
 
Copyright © Jolyon Ralph and Ida Chau 1993-2012. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
Current server date and time: 11th May 2012 18:55:33
Mineral and Locality Search
Mineral:
and/or Locality:
Options
Fade toolbar when not in focusFix toolbar to bottom of page
Hide Social Media Links
Slideshow frame delay seconds