The answer is alot has already been discovered (CSA Mine is my...

The answer is alot has already been discovered (CSA Mine is my favourite example) and it is considered one of the best of not the best brownfield regions in the country.

CSA Mine started in 1890 something and the deposits in the region often get richer as they get deeper given there is a tendency to stack vertically.

With land holdings near PEX and BRB I don't why you would be selling ALY - just panic selling in a down market.

If PEX can show that Wagga Tank Southern Nights and Fenceline all line up into one system you're looking at a potential mineral value in the billions at current prices.

From NSW govt here is what is known so far about the region:

Major deposits are found along the Cobar belt for some 60km from Elura Mine in the north to the Queen Bee Mine in the south. Historical and indicated ore reserves of this belt amount to more than 431 000t copper, 1 600 300t lead, 2 500 000t zinc, 4 050t silver and 56t gold.

Larger total metal figures result if non economic disseminated metal occurrences are estimated and included.

According to its estimated total metal content, the belt contains 5.3Mt base metals, 5 000t silver and 90t gold. The estimated total content of 5.3Mt base metals might comprise 1.1Mt copper, 1.6Mt lead and 2.6Mt zinc, but this can only be a rough determination. The probable gold accompaniment to these metals would be 70t . The metals are hosted in an estimated 85Mt or more of mineralised rock.