GHD | Oceana Gold NZ Ltd | 12552081 | Geochemical Assessment Wharekirauponga Underground Mine (WAI985-000-REP-LC-0013) 13 Manganese 20 448 402 139 1,000 950 0 0 Molybdenum 20 1.34 1.25 0.74 2.59 1.5 0 0-1 Nickel 20 14.7 14.4 11.0 20.6 80 0 0 Selenium 20 3.04 2.74 0.15 10.1 0.05 5 4-6 Vanadium 20 111 109 79.3 167 160 0 0 Zinc 20 71.1 57.1 21.0 219 75 0 0 Notes: Units are in mg/kg unless stated otherwise Arithmetic Mean (and lower bound range) assumes values reported at analytical detection limit are equal to analytical detection limit Bold - Concentrations exceed the mean value for the Earth’s crust Red - Geochemical Abundance Indices of 3 or greater - No data or number of points insufficient to generate a meaningful value 1. Bowen, HJM, 1979, Environmental Geochemistry of the Elements. 2. Geochemical Abundance Indices - The Gardguide version 1.0 - National Institute of Acid Prevention. 3. Values based on Total Carbon. Where Total Carbon data is unavailable, a Total Carbon value of 0.1 mg/kg was applied. 4. Trace element sample analysis was undertaken using 4-acid digestion method which is likely to result in given concentrations of volatile elements (such as mercury) being underrepresented 5. Based on Project Martha Geochemical Assessment, AECOM, 2018 and Waihi North Project Geochemical Assessment, AECOM, 2022. 6. ANC determined by titration, not derived from Total Carbon
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