Geology and copper sulphide mineralization of the Salmagorskii ring igneous complex, Kola Peninsula, NW Russia

The Salmagorskii igneous complex represents a rare example of peralkaline r ocks containing significant copper sulphide mineralization presented by cha lcopyrite, djerfisherite and cubanite. Data on the geological structure of the complex and the copper sulphide-apatite mineralization related to its f oidolitic peralkaline rocks have been obtained from drilling in recent year s. The sequence of rocks (dunite-clinopyroxenite-melilitolite-yolite-urtite -melteigite-carbonatite) forms a perfect concentric zoning within the pluto n indicating that fractional crystallization was the predominant petrogenet ic process. Copper sulphide mineralization formed at the post-magmatic stag e, when recrystallization processes within earlier yolite and melteigite to ok place under the influence of a fluid rich in CO2, H2O, alkalis, S, P, Cu , and, Cl.