|Latitude & Longitude (WGS84):||59° 39' 9'' North , 6° 28' 2'' East|
|Latitude & Longitude (decimal):||59.65242,6.46716|
|Name(s) in local language(s):||Birkeland sinkgruver (Sauda Sinkgruver, Sinkgruvene i Almannajuvet), Sauda kommune, Rogaland fylke, Norge|
|Other regions containing this locality:||Scandinavia|
Old Zn-mines located in Allmannajuvet, along the RV 520 between Sauda og Hellandsbygd. The zinc deposit was discovered by Gregorius Birkeland in 1881, and mining started the same year by Sauda Grubecompani. In 1887 the mine was sold to the english firm The Norwegian Zink Co. Ltd. Later it was worked by a certain C. D. Gilbert. The mines was closed in 1889. The adits and workings listed as sub-localities are probably not complete
Old reports (Horneman, 1919) state that during this period 12 000 t ore was mined with 36.6 % Zn, and ore left in 1919 contains on average 32.5 % Zn and 1 % Cu. The ore is hosted by fine-grained grey gneisses, which most likely represent altered felsic volcanic rocks. The ore consists of three parallel lenses, which is up to 3 m thick. The richest part of the ore zone consists of sphalerite with chlorite, quartz and amphibole as gangue, surrounded by a zone of amphibole-quartz-chlorite-biotite rock, partly garnet-bearing and with disseminated pyrite, chalcopyrite and sphalerite. This zone is surrounded by cherty quartzite, which in the footwall is very rich in garnet.
Today it is a tourist attraction owned by the Ryfylkemuseet. For information on the museum: see http://www.ryfylkemuseet.no
Mineral ListMineral list contains entries from the region specified including sub-localities
19 valid minerals.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
1000 - 1600 Ma
|Mesoproterozoic plutonic rocks|
Age: Mesoproterozoic (1000 - 1600 Ma)
Comments: Deep-seated to high-level intrusions are included. Many charnockites, anorthosites, and large ophiolites, classified as plutons, are distinguished in the database using the SIGNIF item. Ophiolites were classified as plutons, even where remnants may be extrusive and/or sedimentary.
Lithology: Plutonic rocks
Reference: Geological Survey of Canada. Generalized geological map of the world and linked databases. doi:10.4095/195142. Open File 2915d. 
Localities in this Region
Bryn, E. :(1918): Rapport og overslag vedrørende Saude zinkgrube. ;Norges geologiske undersøkelse; Bergarkivet; No.BA 4521;12 pages
Horneman, C.H.S.:(1919): Rapport over Saude zinkforekomster.;Norges geologiske undersøkelse; Bergarkivet; No.BA 4522;20 pages
Carstens, C.W. (1919): Cummingtonite from Sauda. Norsk Geologisk Tidsskrift 5: 351-357
Nordrum, F.S.; van der Wel, D. , (1981): Mineral-, stein- og ertsforekomster innen kartblad Sauda M 1:250 000. Mineral, rock and ore deposits within the map-sheet Sauda (1:250 000).;Norges geologiske undersøkelse; NGU; Skrifter; No.366; 34;1-58 + map pages
Kristiansen, H. (1989): Birkeland sinkgruver i Sauda- en ny turistattraksjon. NAGS-nytt 16 (4), 18-19
Andersson, M.; Cook, N. J.; Korneliussen , A. & Ottesen, R. T.( 2004): Saudaprosjektet -Tipp Raundalen. Mulige miljøkonsekvenser ved deponering av sinkholdig malm. Norges Geologiske Undersøkelse. Rapport 2004-029