Bulletin of the Geological Society of Finland (Jun 1974)

The copper-gold vein deposit of Kivimaa at Tervola, N-Finland

  • P. Rouhunkoski,
  • P. Isokangas

DOI
https://doi.org/10.17741/bgsf/46.1.005
Journal volume & issue
Vol. 46, no. 1
pp. 29 – 35

Abstract

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The Kivimaa ore vein in Northern Finland is located in a shear zone in a folded greenstone bed. The vein is c. 350 metres in length and varies from 1 to 6 metres in thickness. The central and most mineralized part of the vein was mined in 1969, c. 18 000 t of ore were produced averaging 1.2 % Cu and 2 g/t Au. Coarse-grained calcite and quartz form the base of the vein and the major ore minerals are pyrite, magnetite and chalcopyrite. Comparable with analogous sulphide-bearing veins in the Karelian metadiabases in Eastern Finland the Kivimaa ore vein is assumed to have formed as the final differentiate of initial spilitic greenstone magmatism.