organic ores that extract gold from quartz
gold ore quartz concentrate. Gold Leaching of Pyrite Concentrate. Gold Leaching of Pyrite Concentrate The ore consisted of quartz, in which, above the 250 ft. level, the iron minerals were largely oxidized and some free gold was visible below that level few traces of oxidation occurred, and pyrite constituted the principal mineralizer in the quartz, together with occasional pockets of galena