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 exports ...

which is sent several miles through a slurry to Kennecott’s Magna smelter, where the gold and other minerals are removed. From there, an even higher copper concentrate streams to the refinery at ...

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 ...