This unusual mineralogy combined with the ore's relatively high lead levels also makes the lead and zinc virtually inseparable prior to smelting, and there are very few smelters which can process concentrate which is high in lead.
This unusual mineralogy combined with the ore's relatively high lead levels also causes another problem. The high dissemination makes the lead and zinc virtually inseparable prior to smelting, and there are very few smelters which can process concentrate which is high in lead.