Alta Zinc higher on recording three-fold increase in Gorno’s contained zinc with updated mineral resource Alta recently completed extensive diamond drilling and channel sampling at the Italian deposit, adding an additional 4.5 million tonnes in mineral resource to Gorno’s existing estimates. Alta Zinc has significantly boosted the contained zinc resource at its Gorno deposit. Alta Zinc Ltd (ASX:AZI) (FRA:8EE) has been as much as 25% higher in early trading on updating the mineral resource at its Gorno zinc-silver-lead deposit in northern Italy with the asset’s contained resources increased. Overall, the project’s total mineral resource tonnage is now 2.4 times greater than previous estimates, while the zinc grade is 40% higher than Alta’s 2017 mineral resource estimate.