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Zinc-rich and copper-bearing amphiboles from sulfide-free ore occurrences of the Pelagonian massif, Republic of North Macedoniaстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 11 марта 2020 г.
- Авторы: Chukanov N.V., Zubkova N.V., Jančev S., Pekov I.V., Ermolaeva V.N., Varlamov D.A., Belakovskiy D.I., Britvin S.N.
- Журнал: Mineralogy and Petrology
- Том: 114
- Номер: 2
- Год издания: 2020
- Издательство: Springer Verlag
- Местоположение издательства: Germany
- Первая страница: 129
- Последняя страница: 140
- DOI: 10.1007/s00710-020-00694-z
- Аннотация: This paper describes specific features of isomorphism of unusual amphiboles containing up to 23 wt% ZnO and up to 1.3 wt% CuO from sulfide-free metasomatic rocks of the “Mixed Series” metamorphic complex, Pelagonian Massif, Republic of North Macedonia, in which chalcophile elements (Pb, Cu, Zn, Sb, As) occur in high concentrations in the form of oxides and oxysalts. The studied amphiboles belong to six mineral species: magnesio-riebeckite, ferri-winchite, F-dominant analogue of ferri-winchite (“ferri-fluoro-winchite”), ferri-barroisite, ferri-nybøite, and a zinc-rich amphibole related to clino-suenoite. The main substitution schemes are Zn → Mg and Na + Fe3+ → Ca + Mg. The amphibole related to clino-suenoite has been studied in the most detailed way. Its empirical formula is (Mg2.99Zn2.47Mn1.26Fe3+0.30Ca0.07)Σ7.09(Si7.89Fe3+0.06Al0.05O22)(OH)2, and it is the most Zn-rich amphibole among those that have ever been described in literary sources. This amphibole is characterized by single-crystal and powder X-ray diffraction, IR spectroscopic and optical data. The role of high barium activity in the formation of sulfide-free ores of chalcophile elements has been substantiated. A possible mechanism of sulfur immobilization can be described by the scheme S2− + 2O2 ↔ SO42−; SO42− + Ba2+ → BaSO4↓.
- Добавил в систему: Пеков Игорь Викторович