RE: RE: Bonkers reasoning with own calculation why he thinks projections ar...12 May 2025 12:14
Bonkers, just to reply to you (before your other account took over the message board)......
Quick background, for everybody's benefit... There are effectively two mines at TK - and open-pit mine and an underground mine. For the open-pit mine there has been three studies done:
1) Nyota in 2012 - they had an Indicated Resource of 1.05moz. KEFI looked at this and realised that it was wrong (which was why they bought TK), in the following ways: they missed 16,000m of drilling data, which wasn't included in the DFS, didn't correctly understand the geology, used old mapping and modelling software, errors in the calculations, etc.
2) KEFI then carried out their own study, along with further exploration, which increased this Indicted Resource from 1.05moz to 1.62moz, and subsequently 1.86moz. KEFI then got an independently JORC compliant (conservative) DFS carried out, which gave a MRE of 1.72moz. This 1.72moz is the Mineral Resource Estimate, which is based on using cut-off grades of 0.45g/t gold above 1,400m RL and 2.50g/t gold below 1,400m RL. The 1.05moz Ore Reserve Estimate that Bonkers seems to be using I presume is based on this, as Snowden / Epoch (engineer doing the DFS) then did a pit design based on the viable ore that could be commercially extracted. This, at the time, was based on a commercial gold price of $1,250/oz.
3) In 2017, Lycopodium looked at the pit design and tore it up. They did a refreshed mine design that is a lot more efficient (does in 7 years, what Snowden's design took 10 years to mine, and for less cost). Plant capacity went from 1.2mtpa to 1.5mtpa, allowing they to treat more lower grade stockpile ore. For the purposes of the report, and to allow comparison between the 2015 DFS, the geology and Ore Reserve Estimate numbers were let 'as-is'.
So what Bonkers is referring to, is presumably the Ore Reserve, which is based on 1.72moz Mineral Resource Estimate, a poor and inefficient pit design (high AISC), and a commercial gold price of $1,250/oz. In reality, there is a 1.86moz Mineral Resource Estimate in the open-pit mine, which is based on a 0.45g/t cut-off. There is also a whole underground mine, with an expected 1moz+ (again historic, so based on low cut-offs).
The reason that I have used 1.7moz is to be ultra conservative. The 1.7moz comes from only the open-pit mine, and at the conservative 1.7moz that was in the Snowdon DFS as the MRE. I appreciate that this is not the Ore Reserve, but the Ore Reserve is now completely irelevant as we have a new pit design, and completely different landscape in regard to the PoG. The reason I chose 1.7moz, is because we know that there is at least 1.7moz at cut-off grades of 0.45g/t. 0.45g = 0.015oz, @ gold prices of $3,400/oz equals $53.97/t . Mining and processing costs are circa $3/t, therefore, even at these previously disregarded grades, there is $51/t profit, so we know a minimum of 1.7moz will be mined.
More like 3moz in reality though. Hope