Oxides of the pyrochlore-supergroup from a non-sulfide endogeneous association of Pb-Zn-Sb-As minerals in the Pelagonian massif, Macedonia
Varlamov D. A., Ermolaeva V. M., Jančev S., Chukanov N. V.
Zapiski RMO (Proceedings of the Russian Mineralogical Society). 2017. V. 146. N 4. P. 65-78
Specific features of chemical composition, isomorphism and zonality have been studied for pyrochlore supergroup minerals (PSM) from metasomatic rocks of the ore body No. 9 (Nezilovo, Pelagonian massif, Republic of Macedonia). The ore body No. 9 bears unusual nonsulfide association of chalcophile elements: Zn, As, Sb and Pb. PSM were crystallized in all stages of metasomatism. Zoning of PSM and their relationships with associated minerals (Zn-bearing silicates, tilasite, barite, carbonates, various accessory Pb-, Sb- and Zn-oxides, etc.) indicate complex geochemical evolution of the ore occurrence No. 9. Possible mechanism of formation of nonsulfide parageneses of chalcophile elements is discussed.
Key words: pyrochlore supergroup minerals, chalcophile elements, metasomatic rocks, Pelagonian massif, Macedonia.