WERYFIKACJA ZASOBÓW RUD CYNKU I OŁOWIU W ZŁOŻACH ZAWIERCIE I, ZAWIERCIE II, GOŁUCHOWICE I MARCISZÓW (OBSZAR ŚLĄSKO-KRAKOWSKI)

Abstract

THE VERIFICATION OF THE ZINC-LEAD RESOURCES OF THE ZAWIERCIE I, ZAWIERCIE II, GOŁUCHOWICE AND MARCISZÓW DEPOSITS (SILESIAN-CRACOW TRIASSIC PROVINCE)

Abstract. The total indicated mineral resources calculated for the Zn–Pb deposits of Zawiercie I, Zawiercie II, Gołuchowice and Marciszów are ca. 50 millionMgof sulphide ores containing ca. 2.2 million Mg of zinc and ca. 0.8 million Mg of lead. Recalculation of the resources was based on archive data collected in the second half of the 20^th century, current balance criteria, and a new method called radius of autocorrelation. Zinc-lead sulphide ores occur mainly in Middle-Triassic rocks represented by ore-bearing dolomites, which consist
of the Gogolin and Górażdże Beds. The greatest documented recoverable resources (C₁+ C₂ categories according to the Polish terminology) occur in the Gołuchowice (ca. 28 million Mg of Zn–Pb ores; 0.95 million Mg of Zn and 0.23 million Mg of Pb) and Zawiercie I deposits (ca. 17 million Mg of Zn–Pb ores, including ca. 1 million Mg of Zn and 0.4 million Mg of Pb). Inferred mineral resources and volume of ore fields in the Zawiercie II and Marciszów Zn–Pb deposits decreased as compared with the previous estimations based on the old economic criteria and a different method of ore resources calculation (Bo³dyriew’s polygons method). It is mostly due to very weak drilling prospecting (C₂+ D categories). The total present value of indicated and inferred mineral resources of these four deposits constitute ca. 52.4% of total Zn–Pb ore resources of the Silesian-Cracow Province. The Gołuchowice Zn–Pb deposit was deleated from the Balance of raw material and groundwater resources in Poland in 1993 and restored in 2009 (as of 31.12.2008).