WKP PFS – Geotechnical Section Approved by: Approval Date: TBA OceanaGold PEX-000-PLN-046-A Page 9 of 22 Figure 6: Rock density versus UCS in WKP rhyolite UCS samples 1.5.3 Uniaxial Tensile Strength The uniaxial tensile strength was estimated in the laboratory using the Brazilian testing method of applying a load to a wafer-shaped disc of the core. Table 8 below shows the results of 5 different Brazilian tests. The UCS:UTS ratio ranges from 8 to 18. The UCS in the rhyolite samples ranged from 1.4 to 5 MPa, however all of the rhyolite samples were taken from core with a density of less than the 1st quartile value of 2.44. Table 8: Tensile strength results for WKP rock
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