Supporting Technical Assessments

FINAL 120.10 VN, 53°, u, r, CA, hydrothermal breciated vein (dyke); with rock fragments 121.10 JT, 15°, u, r, CN 121.67 JT, 20°, u, r, CN 122.55 VN, 25°, u, r, CA 122.85 JT, 10°, u, r, CN 125.35 JT, 30°, u, r, CN 125.65 JT, 30°, u, r, CN 125.80 JT, 25°, u, r, CLAY, trace Ca 127.00 JT, 30°, u, r, CN 127.40 VN, 75°, u, r, CA 127.60 JT, 20°, u, r, CN 127.70 JT, 70°, u, r, CLAY 127.82 - 127.90 VN, 40°, u, r, Py, dark grey andesite; angular rock fragments; trace other sulphides and calcite 128.10 JT, 15°, u, r, CLAY 129.00 VN, 40°, u, r, Py 129.70 VN, 40°, u, r, Py, trace Ca 129.75 VN, 40°, u, r, Py, trace Ca 120.90 123.70 126.20 129.10 WAIPUPU FORMATION Slightly weathered; grey; porphyritic ANDESITE; very strong; gravel sized calcite inclusions (continued from layer starting at 119.9m ) Slightly weathered; grey; LAPILLI TUFF (andesite); very strong, poly-clastic, subangular gravel sized clasts; some cobble sized clasts 123.30 - 123.65 cobble of pale grey porphyritic andesite Slightly weathered; pale grey; porphyritic ANDESITE; moderately strong; some clay alteration; moderately wide to widely spaced randomly orientated calcite and pyrite veins (<2mm); some drilling disturbance PLT 3.12 MPa - PLT 1.56 MPa - PLT 4.23 MPa - PLT 0.3 MPa - TCR: 100 RQD: 100 TCR: 100 RQD: 100 TCR: 100 RQD: 100 TCR: 100 RQD: 100 TCR: 100 RQD: 100 TCR: 100 RQD: 100 TCR: 100 RQD: 100 121.05 128.8 PQTT PQTT PQTT PQTT PQTT PQTT PQTT PQTT SW SW SW Sample / Test 120 121 122 123 124 125 126 127 128 129 130 20 60 200 600 2000 Estimated Strength (MPa) Defect Spacing (mm) Description (and sub Detail) Visual Defect Result Geological Unit Material Description Number / Type EW VW W MS S VS ES TCR RQD SCR (%) Depth (m) 121 122 123 124 125 126 127 128 129 RL (m) 117 116 115 114 113 112 111 110 109 108 Graphic Notes and Comments: Refer to explanation sheets for abbreviation and symbols. Shear Vane values are corrected. Ground Water Level Time Date Reading Hole depth (mbgl) (mbgl) Equipment: RIG 83 Orientation: 0° Inclination: -90° End of Hole @ 231.7m Vibrating Wire Piezometers at 49.00m, 142.00m, 217.00m PLT are corrected to Is(50) Contractor: Alton Drilling Ltd Casing Method Commenced: 29/07/2020 Easting: 2762466.08 Hole No. : WNDD007 Completed: 11/08/2020 Sheet : 13 of 24 Hole Length : 231.7 Project : WKP Exploration Tunnel - Ground Investigations Client : OceanaGold Corporation Job Number: 12533958 Processed : HJ System: NZMG Northing: 6424304.837 Checked : JHS Datum: NZVD2016 Logged : HJ Site : Willows Farm, Waihi North, Scale @ A4 : 1:50 Method: SURVEY RL: 237.07 m Flush Return (%) 25 50 75 Weathering Instrumentation Installation Water level Report ID: ROCKLOG || Project: WNDD007.GPJ || Library: GHD - NZGD.GLB || Date: 15 September 2021

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