RE: good read22 Oct 2020 17:24
Mako report dated 19 October explains the reduction in predicted (inferred) reserves
The 2015 PEA estimated mineral resources totalling 152,000 Indicated ounces of gold and
787,000 Inferred ounces of gold. This updated mineral resource estimate totals 177,800
Measured and Indicated ounces and 100,900 Inferred ounces of gold. Comparing the
2015 and 2020 models, it was evident that the general location of the 2015 mineralized
zone was modelled appropriately with respect to locations of the principal domains albeit
generous in thickness and extrapolation. Several 2015-modeled solids depicting vein
mineralization have since been drilled showing that mineralization does not exist where
modeled in 2015. Another reason for the difference is that MDA took a more
conservative approach to modeling extrapolations and projections from drill data, where
no drilling was done since 2013. The 2020 volume of modeled veins and veins-plus-halo
were 89% and 46% lower, respectively, compared to the 2015 single-domain volumes.
An important difference between the 2015 and 2020 models is the interpretations of the
mineralization. The vein and vein zones (both averaging >15 g/t Au) have distinct,
sharp-bounded contacts usually within low-grade halos. By modeling these veins and
halos as one in 2015, the extreme high-grades in the vein were spread out into the larger
volume of the halo in the estimate, thereby over-estimating metal, albeit at lower grades
than exist in the vein and vein zones.