Sulfide Trace Element Signatures and S- and Pb-Isotope Geochemistry of Porphyry Copper and Epithermal Gold-Base Metal Mineralization in the Elatsite–Chelopech Ore Field (Bulgaria)

The Elatsite–Chelopech ore field in the northern part of Panagyurishte district Central Bulgaria comprises numerous spatially associated porphyry copper and epithermal gold deposits prospects. In addition to mineralization alteration features, trace elements, lead sulfur isotope signatures sulfide minerals from copper, base metal gold-base deposits/prospects have been studied. LA-ICP-MS analyses pyrite, arsenopyrite sulfosalt validate them as major carriers for Au, Ag, Sb, Se Co. Pyrite three types has specific geochemical characteristics. generally lower total element content compared pyrite prospects, except Se, Co Ni. veins is enriched As, Sb Pb. deposits, Ni contents comparable while shows Arsenopyrite these similar features. Similarly, sphalerite also but higher Cu contents. close spatial relationships between Elatsite Gorna Kamenitsa Negarstitsa-West Dolna well similarities styles, isotopic (206Pb/204Pb = 18.61–18.68, 207Pb/204Pb 15.64–15.65 206Pb/204Pb 18.55–18.67, 15.64–15.68 metal) (δ34S values −3 +1‰ δ34S −1.7 +3.5‰ sulfides support idea a genetic link two deposits. base-metal result common ore-forming event during Late Cretaceous, corresponding deep/higher-temperature shallower/distal/lower-temperature environments, respectively. particular, more radiogenic 18.41–18.47, 15.67–15.76) slightly different compositions +3.5 +10.6‰) distal Kordunsko Dere, Svishti Plaz Shipkite might be consequence interaction fluids with an external older crustal isotopically positive S source. Alternatively, fluid source/event formation may suggested.