RNS5 Feb 2019 14:44
read the RNS
AB and RRR know exactly what they have but they can't put their calculations in the public domain till they have the JORC report
"3-D models were then created, and the old high grade upper orebody and lower orebody modelled, mineralisation calculated, and depletion from historic mining calculated.
Models and tables for in situ mineralisation, both at the original Gécamines 2.5% copper cut-off grade and at a 1% cut-off grade, were then derived."
DYOR