Kotalahti Nickel Belt
The Kotalahti Nickel Belt as defined here represents a 170km long belt of Proterozoic supracrustal rocks and intrusive rocks which host a number of minor and major nickel deposits in major structural domains along a regional tectonic zone call the Kolkonjärvi Shear Zone. This structure follows the Central Ore Belt of Finland and is most evident on regional gravimetric maps. The nickel sulfides are hosted by relatively small mafic and ultramafic bodies of mid-Propterozoic age (1.89 - 1.87 Ga). The deposits occur as clusters in geologic environments similar to that of the Enonkoski Belt. As in the Enonkoski area, the proximity of siliceous sulifide-bearing 'black schists' within the Proterozoic migmatitic mica gneisses appear to be important in the concentration of nickel in and near the mafic/ultramafic intrusions.
Although a number of deposits are known, the only producer of nickel in the Belt has been the Kotalahti Mine from which 12.3 Mt of ore grading 0.66% Ni and 0.26% Cu was mined from 1958 to 1987. Deposits with modest reserves identified in the area of this mine are Sarkalahti, Särkäniemi and Rytky.
Magnus has claim applications covering distinct EM and magnetic airborne anomalies in 4 localities: Rantakylä and Haasialahti located 3 to 4km to the north of the Kotalahti Mine, Lahnanen located 3km to the south and Kotkatsuo, located 10km to the SE.
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