The role of barium in the formation of sulfide-free ores with chalcophile elements in the “Mixed series” of the Pelagonian massif

Chukanov N. V., Varlamov D. A., Ermolaeva V. N., Jančev S.

Zapiski RMO (Proceedings of the Russian Mineralogical Society). 2020. V. 149. N 1. P. 96-107

https://doi.org/10.31857/S0869605520010116

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Language: Russian

Abstract

In order to test the previously stated hypothesis that the formation of sulfide-free endogenous mineral associations with high concentrations of chalcophile elements in the «Mixed series» metasomatites in the Pelagonii massif (Republic of Northern Macedonia) may be due to the immobilization of sulfur according to the scheme S^2– + 2O₂ « SO₄^2–; SO₄^2– + Ba²⁺ ® BaSO₄¯, there has been studied the zonality of minerals in which the isomorphism of Ba and Pb is realized. It is shown that the maximum of barium activity preceded the maximum of lead activity, which confirms the above-named hypothesis.

Keywords: chalcophile elements, barium, isomorphism, sulfide-free ores, metasomatites, Pelagonian massif