Exploration companies estimate grade through drilling and assaying. The average grade of copper ores in the 21st century is below 0.6 percent copper, with a proportion of ore minerals being less than 2 percent of the total volume of the ore rock.
1.97%, 2.9%, and 0.76% is well above the average of 0.6%.
This is higher than average copper.
Ann: High Cu Assays and Significant Pb/Zn Intersections at T3-MOD.AX, page-6
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