Geochemistry of ore minerals from Chelopech deposit: II. Trace-elements in enargite-luzonite

Abstract

The concentrations of trace elements in enargite-luzonite from blocks 8, 19-SE, 19-NW, 19-NE, 19-SW, 103-W, 103-E, 144, 146, 147, 149-south, 150, and 151 of copper-gold high sulphidation Chelopech deposit were determined by LA-ICP-MS. It was found that the enargite-luzonites from the individual blocks are enriched in different degrees of “impurity” elements: those from block 19-SW are enriched in Ge, Ga, and W; from block 146 of Bi; from block 147 of Se, Sb, Sn, and In; from block 149-south of Zn, Pb, Tl, and Cd; from block 8 of Fe, Mn, and Ti; from block 103-Е of Au and Hg; from block 103-W of V, Ga, and Mo; from block 150 of Ag and from block 151 of Те. In addition, a preferential distribution of trace elements between pyrite and enargite-luzonite is observed. For example, silver, lead, manganese, nickel, cobalt, thallium, molybdenum, chromium, and titanium are concentrated in the first, while germanium, gallium, indium, tin, zinc, antimony, tellurium, bismuth, mercury, vanadium, tungsten in the second, and in most cases they are structurally related. Both minerals are concentrators of gold, but it reaches its highest values in the latter (309 ppm from block 103-Е and 118 ppm from block 151), and in both cases its presence is mainly due to microinclusions of native gold and/or electrum and tellurides.