Member Info for Bamps21

Hi Dillon
I will leave the live shows to Magic but I’m not sure who’s with BR tomorrow
ATB:))

My new phone won’t let me copy from Newcrest web site can I refer you to :-

https://www.newcrest.com/sites/default/files/2020-12/201210_Initial%20Inferred%20Mineral%20Resource%20estimate%20for%20Havieron%20-%20Market%20Release.pdf

The 3 levels of plans
4800 level
4500
4200

The black outline shows the MRE shells within it on all 3 levels.
There’s a purple line within these outlining the sulphides.
Everything between the black and purple line are the breccia in the MRE.
The vast majority of the volume and tonnage is in the top zone which they’re saying today as 200m.
There’s only small pockets of high grade and breccia in the Northern breccia.

Gold eq formula = gold grade +1.65%

That was 6 months ago we’ve had further drilling results widening the sulphides within the whole MRE zone and increased grades, also the grades of the breccia adjacent to the sulphides have also increased.
The pockets in the Northern breccia have also increased with size and grades.

The MRE to come I’m sure will look totally different to what it is now and so will the oz/m figures

Hi Hydrogen
Bornite is called the Pea**** mineral
65% copper

Morning Peter
Well done :))

Hi strudel
I’m probably on my own here but I didn’t think the Newmont jv would come to anything.
They only did some survey work with their own designed DSG instrument and they only surveyed Meadows with it, but what they’ve left behind is/has been very useful and found a large target identified by the first round of drilling/ geochemistry work .
It enabled the next round of 6,500m drilling to pin point that target.
That’s all they did for us, I’m ok with that.
Compared with Havieron the results aren’t spectacular but the areas involved are very big and only 120-200m of cover.
I can see why they’ve gone for that westerly licence E38/3613 as it wraps around the north end of Peterswald Hill E38/3185 and then E38/3612 goes off northwards, so they want the continuation.

Hi Strudel
I’ve been woken up by a big gnat, I’ve been trying to swat it , I’ve nick named it timeserved.

When this beast moves back to Ernest Giles you will be saying to yourself I wish I stayed awake in Bamps geology lessons.
What are epidotes and chlorite alterations?
You weren’t listening were you :))
I’ve been quietly researching EG & B
If EG has a length 2/3rd the M25, Meadows on the bottom left (the only one drilled) is only 7km max,
Possibility of 2x5m oz there. Large spread out ore systems.
A further large 5km long target found by MMI survey adjoining Meadows to the North.
But that’s for later!

Hi Bagpu55
There were no historical drills around The Kraken , Blackbeard or London area, most of these were to the North around Swan but were on a grid pattern and air blast drills so not very deep.
They drill positions were based on the survey data of the magnetic and gravity.
They found the basic responses they thought were giving off the responses except London where they said they would need to drill again.
Any basic drilling at Scallywag will be around Swan, London and Teach but don’t expect anything deep this is still early stage exploration campaign.
Oh and maybe Rudall but there has been no survey work there yet.

Hi Blantyre
If you have listened to my tour :)) then standing at the end of the Decline looking towards the ore there is about 10m of concreted breccia between there and the sulphide were after. This sulphide pocket looks around 75mx75x75 so at 3 specific gravity is around 1m tons @4.1 this increases to 1.6m tons.
They won’t stop there though there are further high grade breccia behind it and also further high grade sulphide pockets to the left and right.
The Decline is only capable of removing 2m tons according to Hannams so on that 2m ton extraction the grades are very important
5g/t = 321,000 oz gold
6g/t = 386,000 oz
7g/t = 450,000 oz
8g/t = 514,000 oz
The latest drills found 11 g/t = 707,000 oz

From the same tonnage

Hi Fred
Nice to hear from you.
I’m not on the in Telegram but BR needed help, very subtle negative posts spreading doubt among the vast majority that are not miners.
He seems to not understand what the SE crescent is, calling it SCZ sulphide crescent zone that is not the same as HGZ. The high grade zone contains sulphides and breccia with high concentration of minerals.
The high grade zone is the area of highest concentration of grades picked up by last year’s MRE.
The SCZ is a zone of the sulphide ring which can include weak portions of sulphide with less grades than some of the breccia .
He’s saying there’s no rush to get the SLC started and is 5 years away, what total nonsense, Telfer will be in mothballs by then.
Looking at NCM portfolio over the next year or so while Havieron is gearing up:-
Cadia is between 2 ore bodies the newest one like Havieron is gearing up, the production forecasts show a dip.
Lihir has major production issues
Walfi not onto exploration phase
Telfer running out
Red Chris producing but the bulk caving will take longer than Havieron to get going.

There’s no rush , what a p…..r Rodney !

Interesting if there is bornite in the sulphides, it tarnishes to chalcopyrites when weathered or exposed to acid
Chalcopyrites formula is CuFeS2
Now that means a third each for copper iron sulphur

Bornite formula is Cu5FeS4
Now that means 60-65% copper, 10% iron, 20-25% sulphur

Where there are very high concentrations of copper that is where the bornite probably is.
https://geology.com/minerals/bornite.shtml

Hi eastender
The first ore out from the HGZ is not going to have a high proportion of waste material, Hannams quoted 15% as a general industry standard but this zone is rich in sulphides and other minerals, I’m estimating <5%.

When I asked my mining colleague about specific gravity of these sulphides he replied:-
“ That's afundamentally important question Bamps

I would guess approx 4.

But it is specific to our mix of minerals. From what we have seen so far I think our ore is very variable over relatively short distances so making any calc or sample only very locally applicable.

I do know I mined quartzite at 2.6 and that was very consistent. Our quartz rich conglomerates (with feldspars) were taken as 2.75.

I think our sulphide zone by the looks of the cores has a very variable and large assemblage of sulphides ..... with silica, feldspars Cs/Mg carbonated and iron minerals.

ie
Dolomite 2.84
Feldspar 2.56
Silica 2.7
Malachite 4
Bornite 5
Chalcopyrite 4.2
Pyrite 5
Magnatite 5.1

As I say assemblage and proportions highly variable but for me I feel 4 is fair even though my habit is to call everything 2.75”

Some of those minerals will be classed as waste but not a high %
I was hoping for a high specific gravity maybe 4.1 but I’ve heard the company are using a modest 3 which I believe to be quite low, Hannams were using 3.4 and that is what I based my calcs on.
NB:- a high specific gravity = more tonnage to the cubic metre or more gold and copper per cube so the MRE shells based on 10m cubes will probably give a lower tonnage than is actually there

Hi Texlax
From their innovation section in NCM presentation.
It’s 95% recovery rate doesn’t really matter what grades are but if it’s 95% of a high grade wow

Here’s another gem of a snippet from my mining colleague:-
Evening all.
Earlier Bamps you reminded us of the prospect of hitting the top of the ore body when we expose it (poss Jan 22. )
We have been referencing possible grade as 5 to 6 g/t.
Here is another thought.
Our drilling has demonstrated quite a lot of zoning and variation in grades up and down any particular core barrel.
This can give rise to the idea of blocks of very high grade next to blocks of much lower grade.
If we are able to take the top of the ore body using board and pillar then it's highly likely the planners can design the position of pillars to coincide with the patches of lower grade allowing us to take a very much enhanced grade early doors. So
6 g/t may well be under stating the potential for very high grade mining initially when the capital account needs it.
No worries cos the lower grade pillars will come in the SLC phase.
The bulk samples are likely to have enhanced grades also ....... to cover the capex account.”

From he is saying
5g/t = 321,000 oz gold
6g/t = 386,000 oz
7g/t = 450,000 oz
8g/t = 514,000 oz
The latest drills found 11 g/t = 707,000 oz

From the same tonnage
:))))))

Hi eastender
The first ore targeted contains high quantities of gold and copper in a variety of different minerals.
The sample loads coming out to start with will determine what are the best methods to process these minerals.
The main ore at Havieron for copper is chalcopyrites which has 30% copper,30% iron and 30% sulphides, gold,silver etc are small % in this.
There are a range of other minerals in those sulphides containing precious and semi precious ores
After crushing, gravity circuit, picking and sorting this is the material for the Dore bars, the next stage is determined by the minerals involved.
It could either be put through the cyanide circuit where the cyanide releases the gold and silver from the minerals for the Dore bars or to the flotation tanks to produce a copper concentrate containing most of the minerals . This is then sent on to SE Asia for processing.
Recovery rates for the gold and copper are improving all the time, Cadia is leading NCM to 95% gold recovery rates.
Being high grade it will take less tonnage to produce good quantities of gold/ copper ie less costs for transport and removal.
The depletion factor or waste is mainly at the crushing stage some will be sent to the waste dumps unfortunately.
ATB:))

I’ve been shown a few posts from Telegram about what they thinking is going to happen after the first ore is depleted. They’ve totally not thought through what the PFS is likely to provide.
The PFS is an assessment of the viability for the Initial mining plans, it’s also a stepping stone on the Decision to mine.
This initial plan can not just keep to the MRE quantities it has to look beyond or should I say below.
A wrong planning decision at this stage could lead to a costly mistake for the future of the mine.
The PFS will have to show an initial assessment of the inferred resources below the MRE zone.
Retrieving the first ore at the earliest possible date is an obvious target driving this project.
The issues of being able to retrieve the ore in suitable quantities is something I’m hoping the PFS will address.
Hannams have stated the Decline in progress can only carry a max of 2m tons per annum

I posted these figures a while back:-
If they start stoping the high grade zone this time next year the revenues are looking awesome.
Hannams are suggesting a max of 2m tons of ore per annum.
2m tons at about 5g/t = 321,000 oz
@$1950 per oz less $850 costs =$1,100
321,000 x 1100 = $353,000,000
30% to Ggp =$106m pa or nearly $9m per month.

On top of that there's the copper
2m tons @0.6% = 12,000 tons @$10,000 =$120m x 30% =$36m to Ggp

From discussions I’ve been having the first extraction won’t stop there.
The main Decline will continue downwards possibly with another spiral to around 350m lower to the base of the first SLC operations start date for that production 2024.
They will need to remove most of the high grade around the top of the SE crescent before the SLC starts.
From the top of the ore body at the end of the Decline I’m expecting a ring tunnel to go right round the sulphide ovoid and sending in stoping tunnels picking out more of the HGZ pockets.
Another Decline from the box cut will definitely be needed this will raise the tonnage output to 4m or nearly 650,000 oz pa.

Sandeep has mentioned 6m tons pa target I would presume he is including that with the SLC, this will need a conveyor decline at some point soon.

So so much to go at, they must have a good idea already of what is going to happen

The first drill Ggp did was Had01
Looking at the drill logs there was 121m of drill length, 21.5m was above the 1g/t cut off at an average of 7.78g/t.
89.5m was below that cut off.

Going back to SD comment of 8,500oz/m that works out close to 0.55g/t average
Had01 drill the 89.5m below cut off would therefore theoretically have an average of 0.55g/t.

The average grade for the whole 121m is about 2.1, the web site quotes 2.93g/t but I believe they’ve added an inclusion.
Well this average works out at c20,000oz/m.

Moving on to NCM drills Had8 and 10.
Had 8 recorded about 50m of results and then c200m of nothing.
Had10 recorded no significant results at all.
What happened?
8 was a vertical drill, through the cover into the ore, after about 50m in went into the Dyke.
10 was drilled at 65 degrees through the cover it reached the top of the ore body on the Dyke and followed the angle of the Dyke for about 200m.

What am I getting at?
The 8,500oz/m figure is a good starting point, but to get to that figure I believe they’ve added all the drill lengths going through the Dyke.
I feel the 0.55g/t average has allowed for at least 15% depletion/waste.
I still believe my average of 0.75g/t is closer to reality after a big task I set myself last Autumn of counting the drills to get that figure .
This would increase that average to c11,500oz/m.

The 8,500oz/m is only valid down to the 900m of ore before the area expands and then a bigger figure is needed.

Why do I believe Had 83 is our best hole?

Well besides the 3 intercepts I mentioned in my previous post there are a number of others before these.
The Eastern breccia was formed by a sulphide intrusion through the crackle breccia. The pressures involved forced these sulphides up into the centre of the ovoid forming the Northern breccia and around the northern high grade crescent.
Northern crescent
51.1m @ 1.1g/t
And the sulphide ring within that of
12.9m @ 3.5

Northern Breccia
183.7m @ 1.8g/t
Containing 5 high pockets within it

Therefore Had 83 has 5 very long intercepts plus numerous smaller ones with at least a dozen high grade pockets, so it’s a big contender for Havieron best drill to date.

Drill 83
That 40m gap before the 98m intercept Looks like it is the Dyke.
From the plan on last Oct RNS the Dyke is shown in its position near the top of the ore body but it gets down to that break in the intercept 1300m below surface it has wandered to the SE.
Therefore that break is the Dyke not a weakening in grades .

I can’t see a break in Had 84 , it could be the Dyke has left this zone before that intercept of 342m @ 2g/t
There is a gap at the end of that intercept to the end of the hole

I’ve been looking at those 2 drills into the eastern breccia zone.
Drill 83 (our best drill in my mind)
This section starts inside the ovoid
78m @ 0.65g/t is the link between the northern and eastern breccia
Then there is a 12m gap which is below the 0.2g/t cut off
134m @1.4g/t above the 0.2g/t
100m in to this it hits the sulphide ring
0.9m @ 52g/t
There another 30m of this intercept before there is a weak spot below 0.2g/t for about 40m

The next intercept 98.2m @ 1.9g/t carries on and finishes 20m before the end of the hole but within this last intercept there are high grade pockets
41.1m @ 3.7g/t
1m @ 39m
These 2 were near the end of the hole

Had 84 is very similar with high grade pockets near the end of the hole.

In conclusion these 2 drills are the only drills to have entered this zone at this moment in time, both are consistent in average grades.
They have only gone through the top of the zone.
They both have increasingly high grades near the end of the holes.

Role on next week :))

Hi Strudel
They may have gone into an old drill collar I think YRB1307 straight down 44m deep.
At 60 degrees from there it would be hitting Parlay’s tail 1060m drill hole or could test A32 target to the SW