ANTIMONY-BASED LIQUID METAL BATTERIES slide image

ANTIMONY-BASED LIQUID METAL BATTERIES

MINERAL RESOURCES & RESERVES¹ Proven & Probable Mineral Reserves²: 4.8 Mozs Gold @1.43 g/t 148 Mlbs antimony at 0.06% contained in 104 Mt 3.500 Measured & Indicated Mineral Resources³: 6.0 Mozs Gold @1.42g/t 206 Mlbs antimony at 0.07% contained in 132 Mt Gold (thousands ounces) 3,000 2,500 2,000 1,500 1,000 500 Gold M&I Mineral Resource 120,000 Gold P&P Mineral Reserve Antimony M&I Mineral Resource Antimony P&P Mineral Reserve 100,000 90,000 80,000 70,000 60,000 Antimony (thousands lbs) Yellow Pine Hangar Flats West End Historical Tailings 1 Based on the 2020 Feasibility Study (FS) which is intended to be read as a whole and sections should not be read or relied upon out of context. The information in this presentation is subject to the assumptions, exclusions and qualifications contained in the FS. See "Regulatory Information" at the end of this presentation. For a summary of differences between the FS and TRS, see "Cautionary Note and Technical Disclosure" at the beginning of this presentation. The Mineral Reserves are contained within the Mineral Resources. 2 Mineral Reserves were calculated using an Au price of $1600/oz and Sb price of $3.50/lb and variable cut off grade of 0.39-0.49 g/t Au. The Proven Mineral Reserves from the 2020 FS were reclassified as Probable Mineral Reserves for the TRS. 3 Mineral Resources were calculated using a $1250/oz Au price and sulfide cut off grade of 0.45 g/t Au and oxide COG of 0.4 g/t Au based on the 2020 Feasibility Study. Based on a gold price of $1,500/oz in the TRS, Mineral Resources increased to 6.3Mozs @1.33 g/t using a sulfide cut off grade of 0.40 g/t Au and oxide cut off grade of 0.35 g/tAu. The Measured Mineral Resources from the 2020 FS were reclassified to Indicated Mineral Resources in the TRS due to differences in the S-K 1300 versus NI 43-101 Mineral Resources classification guidelines. 30
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