SULPHIDE MINERALIZATION IN UPPER WESTPHALIAN COAL SEAMS FROM THE EASTERN PART OF THE UPPER SILESIAN COAL BASIN

SULPHIDE MINERALIZATION IN UPPER WESTPHALIAN COAL SEAMS FROM THE EASTERN PART OF THE UPPER SILESIAN COAL BASIN

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Morphologically diversified sulphide mineralization has been found in No.301 and 302 coal seams (Westphalian B).The main sulphide is pyrite which forms veinlets cross-cutting the sedimentary fabrics of the coal, encrusts the cellular structures and intergrowths with oxysulphides.Two generations of pyrites were observed: the preceding grandpas best and the following the oxysulphides.Pyrite composition is stoichiometric, rare admixtures are up to(in wt.

%): Mn lochby venture pouch - 0.19, Co - 0.48, Ni - 0.42 and As - 1.41.

Iron oxysulphides contain up to 35.06 wt.% oxygen.Their composition varies between FeS2O and FeS2O3.Increased contents of As (up to 1.

46 wt.%) and Pb (up to 0.96 wt.%) were detected.