Jan 01, 2019· Gold, copper, cobalt, silver, zinc, lead and bismuth producers on horizon. 135 to 150 g/t and 700 to 800 g/t silver, respectively. Final tailings will be thickened in a new paste fill plant and used as backfill. NorZinc anticipates pre production capital cost will be $279 million including a contingency of $26 million. Fortune Minerals, Nico.