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GEM SERVICES <br /> Dawson Project—Tailings Characterization Page 4 <br /> Table 1: Geochemistry Sample Descriptions <br /> Sample Type Hole ID From To Length Weight Description <br /> m m m <br /> Ore <br /> Altered DA20-18 807 822 15 11.5 <br /> DA18-15 849 858 9 9.0 <br /> Unaltered DA18-16 659 662 3 4.2 <br /> 724 727 3 3.3 <br /> 752 773 1 21 17.5 <br /> Development DA-9005 841 849 4.1 Pink,med grained granite <br /> Rock DA-9007 1102 1109 5.4 Pink-black coarse grained granite& <br /> granite gneiss <br /> GC-18 582 588 4.0 Pink-black quartz-feldspar-biotite gneiss <br /> GC-21 554 563 5.1 Pink granite;weak foliation <br /> GC-29B 795 800 4.7 Pink coarse grained granite with gneiss <br /> bands <br /> The altered and unaltered ore samples were used by BOMENCO for metallurgical testing to <br /> confirm the ore processing flowsheet. The tailings produced from these tests were used for the <br /> tailings geochemical characterization program overseen by GEM Services. <br /> The five development rock samples received from Zephyr Minerals were prepared prior to <br /> geochemical testing. Each sample was crushed to minus'/4"and split to create a duplicate. Each <br /> prepared sample and its duplicate was tested. <br /> 3 Geochemical Characterization <br /> 3.1 Static Tests <br /> 3.1.1 Mineralogy <br /> Mineralogical analysis was completed on the two tailings samples. The mineralogical report is <br /> provided in Appendix A. A summary of results are presented in Table 2. <br /> The mineralogical results are consistent with the granitic host rock described in the drill logs. <br /> Both altered and unaltered tailings are dominated by silicates—quartz,micas and clinochlore. <br /> However,the altered tailings sample has approximately 4%carbonates present whereas the <br /> unaltered tailings is over 99% silicates. <br /> The carbonates present are dominated by calcite. The altered tailings sample also has ankerite- <br /> dolomite and siderite. Carbonates are important acid neutralizing minerals. They dissolve more <br /> readily in the presence of acid to neutralize quickly and they buffer water at a circum-neutral pH. <br /> The exception is siderite. Siderite is an iron carbonate where iron is in its reduced form. When <br /> siderite disassociates, the oxidation of the iron ion produces as much acidity as the carbonate ion <br /> consumes,thereby producing no net neutralizing capacity(MEND,2009). The carbonate <br /> DDS/dds Zephyr_Dawsor_Teilings Characterization Final Report,Feb.3,22,1:18 PM Feb 2022 <br />