The company, in a statement, said that it has increased the size of the Antonio Nortth area to 1.4mln to 2.8mln tonnes, from 0.2mln to 0.5mln, which takes the estimate for the whole project to 3.2mln to 5.8mln tonnes from 1.8mln to 3mln.
It is the result of the review of historical data which has only recently become available.
The exploration target is set alongside a JORC compliant mineral resource which states a gross resource of 608,000 tonnes at 2.58% copper equivalent.
Vast highlighted that it believes Antonio North represents a major near to medium term mining opportunity, and, an underground exploration drilling programme is currently being compiled to better determine its potential.
“Antonio North represents a major opportunity for the company not only to expand our production profile but also to significantly extend the life of mine plan at Baita Plai,” said Andrew Prelea, Vast chief executive.
“The significant value potential of Baita Plai continues to reveal itself and we are committed to maximising this.”