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

An elemental analysis of typical copper/nickel cleaner concentrate produced in the
Lakefield laboratory was completed and the results are shown in Table 13.3. In this
sample, the gold and PGEs appear to be at low levels in the concentrate while
magnesium oxide is also at a low level.
Table 13.3 Lakefield Cleaner Concentrate Analysis (Lakefield 1988)
Element Measurement Content
Copper % 11.5
Nickel % 5.4
Cobalt % n/a
Gold oz/t 0.091
Silver oz/t 1.04
Platinum oz/t 0.20
Palladium oz/t 0.18
Rhodium oz/t 0.005
Iron % 36.6
Sulphur % 29.0
Lead % 0.02
Zinc % 0.59
Arsenic % 0.43
Antimony % 0.004
Silica % 8.54
Alumina % 1.11
Lime % 1.17
Magnesium oxide % 3.13
The following is a summary of the results from this laboratory test work:
• The Wellgreen mineralized material is complex in composition and belongs
to a group of finely disseminated semi-massive mineralized materials with
relatively high pyrrhotite content and low nickel-copper and PGM content.
• The modified flowsheet which includes high-speed conditioning, gave
satisfactory recoveries and significantly improved concentrate grades.
• Pre-concentration of the platinum and palladium from the mineralized
material using gravity concentration was not successful, mainly due to
liberation problems.
• In general, the flowsheet and reagent scheme developed for Wellgreen was
effective and should accommodate variations in the mineralized material
characteristics.
Prophecy Platinum Corp. 13-3 1193460500-REP-R0001-02
Wellgreen Project Preliminary Economic Assessment,
Yukon, Canada