Today, the group released the results from the last 27 holes of the Mina Grande Sur zone in north-central Peru, where, in total 95 holes were sunk.
Highlight intercepts included 18 metres (m) of 36% zinc from one hole and 11.5 metres of 32% zinc from another.
Mina Grande Sur is one of three known zones of high-grade, near-surface zinc along a 1.4km trend.
"The Mina Grande Sur drill programme delineated near-surface, zinc-oxide mineralisation over a length of 350 metres in a north-south direction and as much as 200 metres in an east-west direction, open to the south and southwest," said Jim Walchuck, the president and chief executive of Zinc One.
He added: "Along with the zinc-oxide deposit discovered at Mina Chica, we expect the success of this drill programme to be manifested by a contribution to the total project's resource estimate, which we anticipate will be completed Q4 2018."
At the end of last month, the firm reported positive drill results from work at the Mina Grande Sur zone - unveiling results then from 18 holes.
Notable intercepts included 33.7 metres of 24.2% zinc in one hole and 16.5 metres of 26.5% zinc from the surface in another, the firm revealed.
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