Pulacayo Project Feasibility Study - Apogee Silver

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Pulacayo 1 000 t/d Phase I Feasibility Study - NI 43-101 Technical Report 090644-3-0000-20-IFI-100 Figure 12.43 : Mercator Reject Check Samples - Zn % (N=4) April 2012 Site Visit Program During the April 2012 one site visit by Mercator, quarter core samples were obtained from Apogee oxide zone drill core for purposes of independent check sample analysis. In total, 23 quarter core samples were collected to provide sample coverage across the Ag, Pb and Zn grade ranges represented in the oxide zone. The quarter core samples were collected from drill holes PUD266, PUD230, PUD220, PUD251 and PUD256 and were submitted for analysis to SGS del Peru S.A.C.. A sample of certified reference material CDN-SE-1 and a commercial blank sample were added to the batch of core samples submitted by Mercator for quality control and quality assurance purposes. Sample intervals of archived drill core were selected and marked by Mercator and then photographed prior to being placed in labeled plastic bags for shipment to the laboratory. Core intervals taken for check sample purposes were clearly identified by explanatory tags secured in the core boxes for archival reference purposes (Figure 12.44). All core sampling work was carried out at the Apogee core logging facility on the Pulacayo property by Mercator and Apogee field staff carried out sample cutting and bagging activities under Mercator supervision. After standard crushing and pulverization, Ag, Pb, Zn and Cu levels were determined using the same preparation and analytical methods that were used in the previous Mercator program described above. Mercator core check sample results are compared to original Apogee results in Figure 12.45, Figure 12.46 and Figure 12.47 for Ag, Pb and Zn respectively. Results are interpreted as showing that acceptable correlation exists between the original oxide zone analyses and the TWP Sudamérica S.A. Av. Encalada 1257 Of. 801, Santiago de Surco Lima 33, Perú (51-1) 4377473 Page 93
Pulacayo 1 000 t/d Phase I Feasibility Study - NI 43-101 Technical Report 090644-3-0000-20-IFI-100 check sample data set. Results confirm the anomalous character of mineralization within the sections sampled but also show that lower correlation between sample pairs exists at higher grade levels. This may be related to heterogeneity of oxide and sulphide mineral assemblage distribution at the core sample scale rather than analytical error or sample contamination. Visual core inspection during the April 2012 site visit showed that higher Zn and Pb grades within the oxide zone often correspond with irregular zones in which remnants of sulphide zone mineralogy are preserved. Figure 12.44: Photo of Mercator April 2012 Core Sample Interval TWP Sudamérica S.A. Av. Encalada 1257 Of. 801, Santiago de Surco Lima 33, Perú (51-1) 4377473 Page 94
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Pulacayo Project Feasibility Study - Apogee Silver

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