ФИЗИКО-ХИМИЧЕСКИЕ ПАРАМЕТРЫ ФОРМИРОВАНИЯ ИЗУМРУДНОЙ МИНЕРАЛИЗАЦИИ НА ПРИМЕРЕ МЕСТОРОЖДЕНИЙ УРАЛА

Abstract

Study of the Urals emerald deposits attracted the great attention since their discovery in 1831. Among their investigators, there arc known A. E. Fersman (1925-1940), A. I. Ginsburg (1955, 1959), E. Ya. Kievlenko (1980, 1982) e. a. The last decades were remarkable by elaboration of the pneumatolytic-hydrothcrmal genetic model of the emerald occurrences. It assumes that formation of the phlogopite mica rocks preceded the emerald mineralization (A. I. Sherstyuk, 1965; V. I. Zhernakov, 1980, 1993; μ. P. Popov, 1999; E. V. Gavrilenko, 2000, Y. L. Meiksina, 2003). The present paper displays data of physical-chemical analysis of mineral parageneses ob-served in the Urals Emerald mines. Diagrams within uBe and uCa2+ as coordinate axes represent associations of major and secondary minerals, such as beryl (emerald), chrysoberyl, phenakite, plagioclase, phlogopite, mar-garite, trcmolite. The block-diagrams of stability fields are constructed for the main minerals within coordinates of pH indices, activities of Be2+ and H4SiO4.