Abstract
Three stages are apparent in the formation of the nickel-copper sulfide deposits, viz. magmatic, regional metamorphic, and late metamorphic. In the magmatic stage, syngenetic ores are simple and constant in the composition formed. In the regional metamorphic stage, epigenetic ores appear that are distinguished by diversities in mineral composition, typical of the specific tectonic zones formed during such metamorphism. Late metamorphic alteration is confined to local tectonic zones and is characterized by the inconstancy of the mineral assemblages. In the process of metamorphism, the chemical composition of the mineralized rocks experiences less alteration that results in a reduction of the geochemical contrast of their separate varieties. All metamorphic alteration events took place within the primary ore bodies and did not result in the formation of new ore shoots. Thus, the Ni—Cu sulfide deposits of the region can be classed as metamorphosed magmatic deposits rather than metamorphic deposits.
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References
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Yakovlev, Y.N., Yakovleva, A.K. (1986). On the Role of Metamorphism in the Formation of Nickel-Copper Sulfide Deposits in the Kola Peninsula. In: Friedrich, G.H., Genkin, A.D., Naldrett, A.J., Ridge, J.D., Sillitoe, R.H., Vokes, F.M. (eds) Geology and Metallogeny of Copper Deposits. Special Publication No. 4 of the Society for Geology Applied to Mineral Deposits, vol 4. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-70902-9_9
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DOI: https://doi.org/10.1007/978-3-642-70902-9_9
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