Not sure lead will pose any particular problem with a floatation con however there are always recovery issues with polymetallic ores such that you need a sufficiently high grade to ensure you can take the inevitable recovery losses on the chin.
It may pay to remember that David Tyrwitt is the ultimate old school encyclopedia on all things geology. He will (correctly imo) take a conservative view of any perceived technical risks and address them accordingly. Just my two bobs worth anyway, happy to hold.
Below are my Au.eq assumptions, hope this formats ok:
Qu Long
Commodity Resource Unit Unit Spot Price (US) Calc Price Disc to spot ($US mill)
Copper 5 Mt US$/t $3,230 $2,000 38% $10,000
Molybdenum 70 Mlbs US$/lb $18 $8 56% $560
Silver 100 Moz US$/oz $7 $4 40% $400
$10,960
Jai Ma
Commodity Resource Unit Unit Spot Price (US) Calc Price Disc to spot ($US mill)
Copper 0.5 Mt US$/t $3,230 $2,000 38% $1,000
Lead 0.55 Mt US$/t $998 $800 20% $440
Zinc 0.06 Mt US$/t $1,300 $850 35% $51
Gold 0.45 Moz US$/oz $430 $400 7% $180
Silver 23 Moz US$/oz $7 $4 40% $92
Average discount to spot 34% $1,763
Qu Long
Value (US$)/tonne $10.96
Grade (Au/eq) 0.822 g/t
Jai Ma
Value (US$)/tonne $117.53
Grade (Au/eq) 8.82g/t
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