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Tunaberg Cu-Co Ore Field, Tunaberg, Nyköping, Södermanland, Sweden

Cobaltite
Tunaberg Cu-Co Ore Field, Tunaberg, Nyköping, Södermanland, Sweden

Photo: 2003 John H. Betts
Copper and cobalt mines 14 km SSW of Nyköping. Producing only copper from around the year 1420 when the Swedish King "Erik av Pommern" gave the miners the mining privileges. The Mine "Storgruvan" was abandoned during the 16th century because a pegmatite lens cut the ore and miners lost trace of it.
Reopened successfully first in the 1750ies, the cobalt content was discovered around 1790 and produced as a valuable secondary product.
Mines finally closed~ 1890. Copper and cobalt occur disseminated as sulphides in skarn ores.
By far the richest and largest Mine was Storgruvan (de Besche'ska, Stor Mine)- two wellknown parts were called; Görans Shaft and Lovisins Shaft. Lesser production from Adolfsbergsgruvan, Kabbelgruvan and Österbergsgruvan. Among the other mines were Sofia Magdalena gruvan, Näsmansgruvan and Kattgruvan.

According to Tegengren (1924) the total copper production from 1613 until 1905 was 1354 tons and 61,970 tons of cobalt.


NOTE:

1. According to the type description of both Kieftite and Oenite, the typematerial were collected "from the dumps at the abandoned mine in Cu-Co sulfide skarns of the central zone". (Dobbe et al. 1994 and Dobbe and Zakrewski 1998). They did not reveal the name of the "abandoned mine".

Mineral List

Mineral list contains entries from the region specified including sub-localities
Acanthite
Aikinite
Alabandite
Allargentum
Antimony
Arsenopyrite
Bismuth
Bismuthinite
Bornite
Boulangerite
Breithauptite
Carrollite
Chalcopyrite
Clausthalite
Cobaltite
Cobaltpentlandite
Covellite
Cubanite
Dyscrasite
Emplectite
Erythrite
Galena
Gersdorffite
Gold
var: Electrum

Graphite
Greenockite
Gudmundite
Gustavite
Hauchecornite
Hessite
Joséite-B
Kawazulite
Kieftite (TL)
Linnaeite
Löllingite
Mackinawite
Magnetite
Matildite
Mawsonite
Meneghinite
Miargyrite
Millerite
Molybdenite
Nickeline
Nisbite
Oenite (TL)
Parkerite
Pyroxmangite
Pyrrhotite
Safflorite
Silver
Sphalerite
Stannoidite
Tellurium
Tellurobismuthite
Tetradymite
Tetrahedrite
Tsumoite
Ullmannite
'Unnamed (Fe-Ni Antimonide Arsenide)'
Uraninite
Westerveldite
Wittichenite


63 entries listed. 60 valid minerals. 2 type localities (valid minerals).

Localities in this Region

Sweden

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References

- Klaproth, M.H. (1797): Untersuchung des Glanzkobalts von Tunaberg , Beiträge zur chemischen Kenntniss der Mineralkörper, Zweiter Band, Rottmann Berlin, 302-307

- Johansson, H.E. (1909): Om Tunabergs kopparmalmsfält. Sveriges Geologiska Undersökning, serie C221 (in Swedish)

- Dobbe, Rene T. M. (1991): Tellurides, selenides, and associated minerals in the Tunaberg copper deposits, SE Bergslagen, central Sweden. Mineralogy and Petrology 44, 89-106.

- Econ. Geol. (1994) 89: 919-930.

- Dobbe, R. T. M.; Oen, I. S. (1994): The polymetallic Cu-Co ores in the central mineralized zone at Tunaberg, Bergslagen, Sweden. Neues Jahrbuch fuer Mineralogie, Abhandlungen 166, 261-294.

- Dobbe, R. T. M., Lustenhouwer, W. and Zakrzewski, M. A. (1994): Kieftite, CoSb3, a new member of the Skutterudite group from Tunaberg, Sweden. Canadian Mineralogist. 32, 179-183 [http://rruff.geo.arizona.edu/doclib/cm/vol32/CM32_179.pdf]


- Dobbe, R. T. M. and Zakrzewski, M. A. (1998): Oenite, CoSbAs, a new mineral species from the Tunaberg Cu–Co–sulfide skarns, Bergslagen, Sweden, The Canadian Mineralogist. 36, 855-860 http://rruff.geo.arizona.edu/doclib/cm/vol36/CM36_855.pdf]

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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. 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 thousands 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.
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