ESTIMATEDDate confidence: ESTIMATEDA target, not a fixed dateHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all ESTIMATED pins65% CONFIDENCEOverall confidence: 65%How well the pin's source and references back up its dates.Weighted average of how firmly 2 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins from 50% to 74% confidencein 2.2 yearsRio Tinto[1] expects Oyu Tolgoi to produce around 500,000 tonnes of copper a year on average from 2028 to 2036 across the open pit and underground. Only the year is given, so the pin takes its last day.
Rio Tinto's Oyu Tolgoi in the Gobi is expected to average around 500,000 tonnes of copper a year from 2028, on its way to being the world's fourth-largest copper mine.
