Minerální asociace vesuvianu z karbonátových a vápenato-silikátových hornin na Moravě a ve SlezskuČlánek v PDF
Mineral assemblages involving vesuvianite from carbonate and calc-silicate rocks in Moravia and Silesia
Mineral assemblages and chemical composition of vesuvianite were studied at localities in Moravia and Silesia, Czech Republic. Five distinct rock types were distinguished: (i) reaction zones on the contact of marble and metamorphic rock with contrasting chemical composition; (ii) carbonate and carbonate-silicate rocks along regional faults; (iii) direct intrusive contacts between marble and aplite or pegmatite; (iv) quartz veins and contacts with pegmatite in Fe-skarn; (v) various silicate or carbonate-silicate rocks in contact envelope of large granitoid plutons. Vesuvianite-bearing mineral assemblages commonly include grossular, quartz and calcite, wollastonite and diopside are mostly present. Chemical compositions of vesuvianite, particularly Fe/Mg ratio and Ti contents, vary relative to the individual paragenetic types. Mineral assemblages involving vesuvianite are a typical indicator of high activity of H2O in metamorphic fluids up to Xco2 < 0.03 in the equilibrium assemblage Ves + Woll.
Stanislav Houzar, Department of Mineralogy and Petrography, Moravian Museum, Zelný trh 6, 659 37 Brno, Czech Republic
Milan Novák, Department of Mineralogy and Petrography, Moravian Museum, Zelný trh 6, 659 37 Brno, Czech Republic
Vladimír Šrein, Institute for Rock Structure and Mechanics, Czech Academy of Science, V Holešovičkách 41, 182 09 Prague, Czech Republic