RE:RE:RE:RE:RE:REVISITING THE DECEMBER 2018 NEWS RELEASE - ASTOUNDINGBuccaneerBill wrote: JRafflesUK wrote: You do realize that you are confusing fresh grade with sorted grade right Ronald?
Admittedly, the cost of sorting & trucking needs to be added to the cash/AISC cost, but this is likely to be minimal in the light of the concentrated gold grades expected to be achived.
No. One needs to differentiate sorted grades from actual grades in place before sorting. One has absolutely nothing to do with the other. Ronnie is comparing nvo grades after sorting with Fosterville and other's grades mined.
Sorted grades have virtually no relation to grades in place. They are a reflection only of how effective the sorter is.
Take an extreme example just for illustration purposes:
You have a 1 million tonne stockpile of barren waste with no gold. You drop 1 pure troy oz bar of gold on top of that stockpile, then you pass the entire stockpile through a sorter. The only thing the sorter should pick out is the 1 oz bar, so you weigh that and you say you got the equivalent of 1,000,000 gm per tonne of gold and you would be correct in saying that. But that doesnt mean the process was economic. If you have 1 sorter that runs at 30 tph 24 hrs a day it would take you 4 years to run 1m tonnes through the sorter and all for $1850 usd of gold.
Billy
Boy that's a grim example.
Because in the end only one ounce of gold is recovered (maximum)regardless of the amount of rock.
And that end comes when mines eventually deplete. Fosterville is no exception.
Tx