Mt Isa is a good case. Largest SEDEX deposit in the world - just...

Mt Isa is a good case. Largest SEDEX deposit in the world - just as the zinc deposits were exhausted they stumbled on the copper deposit at depth, now it too is almost finished, a few more years. It will be hard to replace that one. But it will happen at huge cost of exploration and development, IF the costs are right.
Storm is the standout because its huge - tenement is 150 km long, and there are outcrops everywhere. So far hundreds of drill holes have hit high grade copper (that's say >1.5% Cu) with only a handful of misses. Also because geotech is successful at disclosing mineralised strata at depth.

So far only the 'Storm Project' itself has been explored, with thousands of sq kms to go - e.g. Tempest with a kilometer scale gossan outcrop.