Wellgreen Project Preliminary Economic Assessment ... - OTCIQ.com

26.2 M INING
sample selection should be distributed from across the entire mineralized system and
from various grade groups. If platinum and palladium assays do not exist for the
selected samples, platinum and palladium analyses should be completed as well.
Tetra Tech also recommends that all drilling programs with SG samples should be
collected systematically in the various rock types and grade ranges. This will
generate enough data to develop a robust regression formula for SG values, based
on the grades of the resource blocks.
BLOCK MODEL
The block model used in the optimization is a whole mass although there had been
mining operations in the past. Reports from production records indicate that Hudson
Yukon Mining produced 171,652 tons (155,720 t) assaying 2.23% nickel, 1.39%
copper, 0.065 oz/ton platinum and 0.073% cobalt between 1972 and 1973. This
likely does not include the drifting, which is both in and out of the mineralized
material. Since the tonnage was so small relative to the resource (less than 0.05%
of the total resource), it was not considered to be material to the overall resource.
For the advanced levels of study, prefeasibility and feasibility, this needs to be
addressed.
PIT O PTIMIZATION
The pit optimization should be updated with the recent results of the metallurgical
test work and the costs derived from the economic analysis.
The economic cut-off grade determined in the current pit optimization should be
validated with metallurgical test results of samples within this low grade range.
OVERALL P IT SLOPE ANGLE
A comprehensive geomechanical study is required for the next level of study, since
the pit slope angles were based on conservative estimates from previous experience.
A steepening of pit walls may improve the mine plan and economic evaluation.
Details on wall slope stability by orientation and by rock type is required.
HYDROGEOLOGY
A comprehensive hydrological study is required for the next level of study. Pit
dewatering parameters need to be determined and the extent of the requirement for
dewatering wells needs to be assessed if dewatering is required. A detailed
Prophecy Platinum Corp. 26-4 1193460500-REP-R0001-02
Wellgreen Project Preliminary Economic Assessment,
Yukon, Canada