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Table 1 below, shows the characterization of these sample composites.
-------------------------------------------------------------------------------------------------------------------------------------------------------- TABLE 1. Characterization of Composite Samples-------------------------------------------------------------------------------------------------------------------------------------------------------- MATERIAL # ofMINE TYPE Drill holes WEIGHT AVERAGE GRADE ----------------------------------- ----------------------------------- Au, Ag, Kg g/mt g/mt--------------------------------------------------------------------------------------------------------------------------------------------------------UNDERGROUND White Bx 11 408 1.71(1) 1.5--------------------------------------------------------------------------------------------------------------------------------------------------------OPEN PIT White Bx 9 516 0.75(2) 3.7 --------------------------------------------------------------- --------------------------------------------------------------- Green Bx 10 572 1.64(2) 6.9----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Source: Inspectorate(1)Average of triplicate splits (3 assays)(2)Average of duplicate assay of triplicate splits (6 assays)
Metallurgical Test Results
Initial test work was conducted on the three composite samples representing the major geo-metallurgical units at a target P80 grind of 74 microns. After gravity separation, the gravity tails were subjected to rougher gold flotation using different reagent schemes. Once optimum process parameters for flotation were established, tests were conducted to evaluate gold recovery versus grind size for each master composite.
Table 2 shows the effect of grind size on gold recovery for the major geo-metallurgical units. An economic analysis will determine the optimum grind size.
-------------------------------------------------------------------------------------------------------------------------------------------------------- TABLE 2. Effect of Grind Size on Gold Recovery-------------------------------------------------------------------------------------------------------------------------------------------------------- OPEN PIT UNDERGROUND-------------------------------------------------------------------------------------------------------------------------------------------------------- WHITE BRECCIA GREEN BRECCIA WHITE BRECCIA-------------------------------------------------------------------------------------------------------------------------------------------------------- P80 Au P80 Au P80 Au microns Recovery % microns Recovery % microns Recovery %--------------------------------------------------------------------------------------------------------------------------------------------------------186 97 182 92.5 188 98.7149 89.7 145 94.4 164 98.6125 92.2 123 96.9 127 97.1110 98.8 99 94.1 104 98.574 97.5 70 99 70 99--------------------------------------------------------------------------------------------------------------------------------------------------------
