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

• Published in: Bulletin of the Geological Society of Finland
• Main Authors: P. Rouhunkoski, P. Isokangas
• Format: Article in Journal/Newspaper
• Language: English
• Published: Geological Society of Finland 1974
• Subjects: Geology; QE1-996.5; Kivimaa; karelia*; karelian; Northern Finland
• Online Access: https://doi.org/10.17741/bgsf/46.1.005; https://doaj.org/article/0e21f95bd31041d6a0924298bf0a7c64

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.