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1 2000

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Bismuth minerals of the Beregovo ore field: mineral assemblages and spatial zonation (Transcarpathian, Ukraine)

Biruk S.V., Skakun L.Z.

Geological Quarterly

2000

Vol. 44, Nr 1

39-46

New compositional data on Bi-mineralization from ores of epithermal gold -(+copper)-silver-base metal deposits of the Beregovo ore field in the Ukraine are presented. The Bi-minerals are developed at deep levels of these deposits and occupy narrow zones at the limits of the ore bodies, Bi-sulphosalts from a temporal range (from early to late) of: Ag-Pb-Bi and Ag-Cu-Pb-Bi (+Pb-Cu-Bi) and Bi(2)S(3) Bi-minerals escaped from destruction during successive processes owing to their occurrence in a dense quartz matrix. Spatially Bi-mineralization is developed as a frontal zone of massive chalcopyrite aggregates.