Ann: More Significant High-Grade Au-Cu Intersections at Calibre, page-117

https://www.investorschronicle.co.uk/news/2020/12/29/iron-ore-what-rio-tinto-falling-behind/

Consensus estimates compiled by FactSet see iron ore cash profits peaking this year at $18bn before steadily falling to $10bn by 2024. Copper will grow in terms of cash profits during that time, according to analysts, but not enough to make up the deficit. Rio is also looking at spending increases through Oyu Tolgoi and other major projects such as the Koodaideri iron ore project and the extremely deep Resolution copper mine in the US.


It makes perfect sense for new RIO CEO to spend big in their own backyard instead of their other copper projects in Mongolia & destroying sacred Apache Indian mountains in the US. So we're already seeing a ramp up of the RIO/AZY Citadel JV, and expect for it to ramp up further in the near future.
From reading the Winu Project environmental impact study, I think the only hurdle was the relocation of the local Bilby population. So no great barriers for the project