Lower production, differing storiesCopper production at Antamina has dipped due to lower grades this year, but the mine has still been running at an impressive rate of 30,000 tonnes per month. However, as Stefan Ioannou of Haywood Securities explained to Copper Investing News, while the mine is responsible for one-third of Peru's copper production — and is also the country's biggest zinc mine — it's important to remember that Peru in turn is responsible for about 8 percent of copper production worldwide. "On a global scale, about 2 to 3 percent of global supply comes out of Antamina on the copper side of things, " the analyst said. "It's a significant mine for sure." Still, with production slowing and profits decreasing, there's definitely less to go around. SUTRACOMASA, which represents roughly 1,630 out of 2,860 workers at the mine, has said that the strike will have a significant effect on the mine's production. Spokesman Hernan Robles told Reuters by phone, "[t]he mine cannot send minerals to ports through its mineral pipeline or for that matter send shipments."