Oceana Gold Waihi North Project Waihi North Project Geochemical Assessment – Geochemistry of Tailings and Overburden, Treatment and Mitigation Revision 0 – 17-Jun-2022 Prepared for – Oceana Gold (New Zealand) Limited – Co No.: 2274246 36 AECOM • Mean copper, lead and zinc concentrations in Gladstone and WUG ore are generally lower than in historical ore. • Gold and silver are extracted as part of mineral processing and assessment of GAI in ore is therefore not relevant. While silver has a consent compliance limit existing mine waters show that it is not elevated in TSF waters and leaching tests (Table 18) suggest the Gladstone and WUG ores will not result in any increase in dissolved concentrations.
RkJQdWJsaXNoZXIy MjE2NDg3