Ferroan dolomites and ankerites from the Silesian-Cracow deposits of zinc and lead ores

Abstract

Within the Silesian-Cracow deposits of zinc and lead ores occur dolomites, containing isomorphic admixtures of about several weight percent of bivalent iron and several weight percent of manganese. These rocks are regarded depending on the ratio Mg:Fe as ferroan dolomites or ankerites. Their occurrence is - as indicated the observations of the author and literature data - common and usually they are connected with mineralization, located both immediately nearby ores and on peripheries of mineralized zones.