Also on the visuals, note that visual sulphide % are quoted on volumetric basis.
But chalcocite is twice the density of dolostone host rock, so 1% logged chalcocite is 2% weight percent chalcocite. Assays are done on weight percent.
Copper being 80% of chalcocite, a logged 1% chalcocite interval should assay 1.6% Cu which is what we have seen in the past at Storm.
Ann: Major Copper Discovery Confirmed at Storm, page-597
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