If you want to follow a discovery-phase explorer in Arizona, go here.  https://arizonasonoran.com/about-us/about-arizona-sonoran-copper-company/

Yes, the photo shows an old open pit mine, but ASARCO (American Smelting and Refining Co.) mined it out and sold it about four years ago.  New drilling is showing additional porphyries near the surface and at depth.  118.5 million shares out (fully diluted).

The location is between Phoenix and Tucson, near US Hwy 10. 

This is not a recommendation - I am not a shareholder, but the company is on my watchlist. 

VP