HudBay to begin land clearing for FIVE PROPOSED OPEN PIT MINES associated with the Rosemont project.  As a reminder, the initial Rosemont discovery was estimated to be capable of supplying 20 percent of the US's copper needs (without consideration of related by-product metals).  Further discoveries adjacent to the initial discovery have made this area one of the most important new economic mineral clusters this century.  However, it still faces anti-mining resistance from nearby Tuscon, a.k.a.  "Little Berkeley." 

Lithography at Rosemont is similar to what is known for the area around Tombstone and Hay Mountain.

https://www.knau.org/knau-and-arizona-news/2022-04-05/mining-company-plans-to-begin-site-preparation-work-soon