Drilling at the Central Oxide pit west wall yielded a 28m intersection at 10.42 grams per tonne gold using a cut-off grade of 0.5gpt and starting at a depth of only 42m.
At the Kavursuki prospect, considered a northeast extension of the Sinivit system, the best trenching result was 4m at 13.72gpt gold at 26m using a 0.5gpt cut-off grade.
Drilling at the Northern Oxide Zone of the open cut operation had a best intersection of 16m from the surface at 9.58gpt gold.
When using a cut-off grade of 5gpt, this intersection included 8m at 18.7gpt gold.
NGG chairman and chief executive Bob McNeil said the drilling at the Central and Northern Oxide areas confirmed the increased oxide resources at the Sinivit mine.
"The Kavursuki trenching has defined a continuous zone of higher grade mineralisation within a wide, 50 to 70m zone of silicification that averages 0.1-0.5 grams per tonne gold," he said.
"The main higher grade zone averages 4 to 16m in width and represents at surface significant oxide mineralisation that will be able to be treated through the present Sinivit plant."
All drilling intersections were taken with reverse circulation rigs.