On Kennecott copper mine: "Mined copper production was 35% lower than the fourth quarter of 2023. This was primarily due to reduced head grade caused by geotechnical instabilities in the pit wall ...

is pushing copper prices higher. In that environment, Kennecott’s miners can’t pull the rock out too fast. Annual production is 200,000 tons of copper and 2,000 tons of molybdenum. And with ...

Rio Tinto, the world's No. 2 mining company by market value, on Thursday reported a drop in iron-ore production and shipments from its Australian mines. Fourth-quarter and full-year output and ...