Chile's total copper production fell 0.8% in April to reach 416 200 t, government copper commission Cochilco announced on Friday.
Chile is the world's top miner of the highly-conductive red metal.
Copper production from state-owned Codelco fell 17.4% on a year-on-year basis to settle at 101 300 t, while output from Collahuasi, a joint venture of Anglo American and Glencore, dropped 1% to reach 41 500 t.
Meanwhile, output from Escondida, which is controlled by Australian mining giant BHP, rose 19.6% to 105 100 t, according to Cochilco data.
