Oceana Gold New Zeland Limited Hydrogeology Support for WKP Underground Updated Conceptual Model gouge-filled faults in the footwall. Water levels are relatively consistent at all test locations and depths, ranging from 109 to 137 MASL (meters above sea level). The narrow range of K values and consistent water levels suggest the EG vein aquifer is hydraulically connected across the test zones in this section. Figure 4-5 is the same section through the leapfrog model, with test intervals shown as cylinders, interpreted water levels shown as white spheres, and water losses observed during drilling of other exploration bores shown as red spheres. As shown in this figure, water losses are concentrated at the contact between the rhyolite flow dome and volcaniclastics (as discussed previously in Section 4.1. Figure 4-5 Water losses registered in along the contact between Rhyolite Volcanoclastics and Rhyolite Flow Dome (red area) The drilling pad where boreholes WKP-101 and WKP-103 are collared is located the central part of the project area. These boreholes were advanced at nearly the same azimuth (136o and 137o), but at different dips of 20- and 27.5-degrees for resource infill drilling purposes. Both bores penetrate the central portion of the EG-Vein System, where an ancillary NW/SE vein structure crosses the main NE/SE vein structure, and extensive quartz stockworks are developed in the hanging wall. A total of thirteen (13) hydraulic tests have been completed in the two boreholes. Figure 4-6 presents a schematic cross-section parallel to bores WKP-101 and WKP-103, showing key geologic contacts, the extent of the vein system, results of hydraulic testing, and the calculated water table elevations.
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