What does this mean then?
"At a 2% Pb cut-off for both deep and shallow mineralisation, the resource estimate is 44.5Mt at 7.8% Pb, 180g/t Ag, 3.6% Zn and
0.3% Cu (global 2% Pb Cut-off); this represents the high grade
‘core’ mineralisation that is enveloped by lower grade ‘halo’
mineralisation"