The role of halogens and sulfur in apatite for evaluation of Cu-Ni, Fe-Ti AND Au ores In late palaeozoic gabbroids of the Wst Magnitogorsk zone (South Urals)

V.V. Holodnov, D.N. Salihov, E.S. Shagalov, E.V. Konovalova, I.R. Rahimov

UDК 553.216(470.55)
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Late Paleozoic gabbroids of West Magnitogorsk area were classified according to correlations between halogens and sulfur in apatites. For Hudolazovsky complex specialized in Cu-Ni mineralization apatites with the highest content of sulphate sulphur are common. Specialization of later gabbro-diorites of Hudolazovsky complex for apatite-ilmenite mineralization was detected. Apatites in gold-bearing Ulugurtausky dike complex have moderately high chlorine content and low content of sulphate sulfur. The appearance of late apatite-rich calcite segregations characterizes local late-magmatic fluid composition. Basayevsky complex is not similar to Utlyktashsky according to correlations between halogens and sulfur in the apatites, it tends to be closer to Hudolazovsky complex due to the presence of sulfur. It is shown that conformal lopoliths of Utlyktashsky complex along with skarn-magnetite mineralization have potential of ore-bearing in impregnated titanomagnetite-ilmenite ore. The facial conditions of rock crystallization were characterized by the composition of amphiboles. It was concluded that Late Paleozoic continental-margin intrusive complexes of Hudolazovsky basin are related to the evolution of a single mantle magmatic source, plume possibly.

Figures 7. Tables 3. References 18.

Key words:apatite, gabbroids, halogens, sulfur, mineralization.

МINERALOGY № 3 2015