Of the results so far, I'm ignoring DDH07, 32 & 37 which gives an average thickness of 28.9M at 1.45% Cu & 19.54 g/t Ag.
Apply that to the current area and you get @ 24.5 MT containing 356,700 T of Cu & 15.3 Million ounces of Silver.
The drop is down to the reduced area & continued drop in average grade in recent results.
Lets see if DDH 41 to 51 start to expand the area again slightly.
LOTM