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

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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 Södermanland Nyköping Tunaberg Tunaberg Cu-Co Ore Field Adolfsbergsgruvan Kabbelgruvan Österbergsgruvan Storgruvan

References