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Hi Speedy
I never know what reaction I will get when I post any figures, today I here coming back from the Board 'silly old codger' forget about those they will never happen.
But some of my calcs have and are falling into line.
A line of ducks :))
If I have worked out financial sums I always work on $1,000 revenue for gold therefore leaving the rest to Aisc and being ultra conservative.
With the saying gold pays for everything and the copper is the profit, so $1,000 revenue for gold and $9,000+ for the copper
Hi Bamps Thanks. I will do my calcs on AISC £100/oz all the way to $750/oz for all ore down to 2300mts. Not sure i will post my results as it may scare some who are afraid of earning too much. ATB Speedy
Hi Speedy
To be honest I never included any copper values below 1600m, I'm unsure of the copper at those depths if it's there it could wipe out the costs especially so if there's any cobalt.
I'm expecting the Aisc to be very low for the top levels the high grades could send it to be $100 or lower.
The bottom levels depending on the copper grades and whether the gold grades near 2g/t could be below $500.
Consistency in the grades = cheaper processing.
Is that any help
Hi Bamps . Thanks for the reply. If, for arguments sake, AISC for mining at 1200mts is $500/oz what would it be for 2300mts? Double, more than double, less than double. I am just trying to work out the SP in relation to your calcs. Only for fun you understand. ATB Speedy
Hi Speedy
The costs are high for deep mining, getting the ore out is a big factor.
That Gwalia mine intends to truck it out , 2 hour round trip at 1600m deep so 2300 could be 3-4 hours.
More ventilation shafts , water cooling to reduce humidity, ventilation system, underground vertical haulage shafts.
Conveyors are cheapest method but no good round spirals so long straight declines needed.
Getting labour to and from the face takes time and loss of production.
That's why further down you go the grades need to be good
ATB:))
Hi Bamps,
Have been following your calcs. for a while now and I am nowhere near an expert as you, but appreciate the tremendous effort that you apply. I even like the way that some of your figures could even be a tad conservative (ie 0.75g/t) My knees are going weak on the thought that we'll ever get close to these figures. With the increasing demand for cobalt, I'm sure that that is a metal that will be produced.
I have made the assumption that you have included the copper credits in your figures so far, and have a strong belief that the demand for that will also increase on today's high price.
Many thanks again for your unselfish sharing of your calculations.
Hi Bamps. Your calculations are great, thanks. Can you please explain for us mere mortals the extra costs involved in really deep mining. The costs for 2300mts must be huge. ATB Speedy
Just clarifying my calculations in my head
If the mine goes down to 1200m ( possibility it might only go to 1100)
That's 400m-1600m true depth
Would give 15.3m @ 0.75g/t
If the mine eventually gets to 2300m that's an additional 700m
Then for 700m @ 1g/t = 19.6 x89% recoverable = 17.4m oz
For 2g/t = 29.4m x 89% = 26.2m
17.4m+ 15.3m = 32.7m oz + 11m equivalent (cu) (for 1g/t)
26.2m + 15.3m = 41.5m + 11m eq
So the range is somewhere between 32.7m and 41.5 depending on grades + 11m eq + 3m eq (cobalt if they go for it)
for a depth of 2300m( not likely to go any deeper)
NB! still open to northwest,north,northeast
Youve made me faint again Bamps!
I think that's prob quite realistic actually - it will be proven up over the next 15 - 25 years....
Yeah, totally understand Bamps and with you all the way. (You’re clearly able in that area)
However, when the depths start hitting 50m@15g/au and the step-outs hit 200m@9g/au again...it’s just gonna be back to the drawing board for you ;-)
Inflation "beat" @2.6% - PMs spiking.
Dig in peeps.
Hi Flashy500
Those calcs are from 1300m true depth to 2300m.
Don't forget to add on the figures from 400-1300m
Hmm massive massive
and then the copper:)))
Hi Ggpt
These are calculated guesstimates.
I was a lot closer with the MRE figures than Hannams figures.
The big question is how deep will they go, the PFS and FS should answer this.
I'm hoping for a long 3k drill this summer to maybe help with this
All this calculating and guessing, seems a bit pointless to me as so many factors will keep changing.
...the most important thing to remember is that “Tier 1s give you nice surprises” ;-)
...and sit in those fracking hands :-)
42m oz from H alone? I feel all faint.....
Bamps. You are about there but all bare in mind this is 30% current to GGP approx 7.5 m oz over life approx 25 to 30 years but none the less once PFS in place , its a done deal
Calculations including the Eastern,SE and NW crescent extensions and allowing for 1,200m of ore but not the Northern extension
"I've gridded the plan and fairly accurately I believe the area = 176,000 sq m after deduction for the dyke.
I've split the depth into 2 sections
900m deep for the 650x375 section
300m deep for the 800x500 section
2.75 breccias specific gravity
0.75g/t average breccias grade
Top 900m
900x 176,000 x 2.75x 0.75 divided 31.1=10.665m oz
Bottom 300m
300x 314,255 x 2.75 x 0.75 = 6.25m oz
Total = 16.9m oz
I've worked out the gold recovery rate is about 89% average of the breccias and sulphides
Therefore the quantities are around 15.3m oz.
The 2.75 is conservatively on the low side
the 0.75g/t may increase.
It's all about the average grade but from what I'm seeing 1g/t or less is realistic "
From these calculations I've not taken into account for the High grade zone allowing this to compensate for any waste rock.
I've used 0.75g/t to allow for the shell cut off levels.
Conclusion
@0.75g/t = 15.3m oz (most likely)
@1g/t = 23.5m oz
This is from an old post, the comments from those 2 geologists made me stop and think.
The concreted breccias below 1600m true depth (which is the deepest we have drilled down to) seem to be increasing in area and crackle breccias diminishing.
We have grades in the eastern breccias of a constant 1-2g/t.
Assuming my assumptions are anywhere near we have a lower ovoid size of 800x500.
This would equate for every 100m depth of 2.8m oz @1g/t and 4.2m oz @ 2g/t.
2300m seems to be a figure for deep mining extent.
so 1200m of ore is 1600m true depth
so that is 1000m of ovoid at 800x500
= 28m to 42m oz.
without copper equivalent.
Massive,
massive
huge