Growth of Havieron
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Stuartw6040
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Re: Growth of Havieron
Some great posts guys
Re: Growth of Havieron
From the mining proposal
2-4mt per annum
Paste for the SLOS operation will come from tailings lakes 1,2,3 and 6 as these have been moisture tested .
Normally tailings would be dried and pelleted for transport and water/cement added at the Paste plant.
In this case the tailings maybe the right consistency to be transported and just cement added at the plant.
Looks like SLOS is the preferred method as to not disturb the aquifer too much
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Re: Growth of Havieron
This is the Moodoo seismic line it clearly shows a reflective image that Artemis were targeting at Nimitz.
The cover can clearly be shown to be getting deeper the further east you go. At Nimitz it’s 526m from memory.
That arrow is indicating a rough line of the Dyke showing it’s incline to the East.
Question I have “Is this the source of Havieron “
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speedymeadie
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Re: Growth of Havieron
Hi bamps. Many thanks for your great work. 20million ozs looks like an understatement. Would you care to predict an all encompassing fig for Hav. No problem if not, just interested in your views. ATB Speedy
Re: Growth of Havieron
Shaun back in Feb when asked about Havieron comparisons to Telfer during the first Sunday Roast podcast:-
* Telfer is close by and has processed over 20Moz over time, how much is that worth compared to the current value of GGP?
- They are comparatively close at 45km away so we can share infrastructure as it is a truckable distance
- Telfer has been in operation for some 35 years and it has taken them this long to process and mine around 13m of those ounces
- Perhaps puts it into context as to why this sits in a major and if you go back in time, what would you pay for Telfer at its dawn…..it would have been an eye watering sum as it has been a grand old lady of Oz mining
- Like to think Havieron has a similar opportunity and to understand if it is of a similar 20Moz endowment could take 3 to 5 years of drilling out to understand and unlock
- Havieron goes down to some 1350 vertical metres and still open, the logistics of drilling down 1350m plus cover at an angle are intensive, so as the decline is put in place it will enable underground drilling platforms which will accelerate, economise and decrease the cycle time of information
- Speed of exploration and drill information is going to continuously accelerate as Havieron develops over the next 3 years and will help unlock the value.
And then in 2nd Interview with GGPHelp's own Liam talking about future growth at Havieron:-
* So how then, because obviously there's a lot of Capex needed to get that far, the transition to growth - how do Greatland grow from here?
- Well, let me answer that in in two parts. Firstly, just because in the preface, you talked about a lot of Capex, one of the brilliant elements of this and indeed of the joint venture with Newcrest is that Newcrest is effectively developing this as a mid-cap would, which is tailor made for Greatland’s balance sheet.
- What are we doing? We're driving in and developing the SE Crescent hitting that high grade ore, we're going to then take that through and process it and then have ounces of gold and tonnes of copper to sell and that will generate cash flow and then we can reinvest that into the mine to continue to grow that, continue to advance the decline to all the way to the bottom of the SE Crescent.
- But that also opens up additional access to these additional mining areas. It opens them up in terms of infrastructure so that when we do want to open them up for mining, we're sitting right next to them but also opens them up for drilling.
- Once you can put in an underground drill rig sitting right next to the Eastern Breccia or halfway down the decline to drill out that Northern Breccia, it's a shorter drilling length and that is obviously cheaper, but equally it shortens the cycle time for information. (Reporting cycle between results).
- So, you have these beautiful, you know, positive kind of feedback where drilling is cheaper and quicker and you understand those elements of the ore body quicker. And because you have infrastructure already near those elements, the potential to bring them on as mining zones is also improved both economically and from a time perspective.
- If I answer your question in the second part, which was talking about you know, how do we see the expansion?
- Well, we've got the ongoing growth drilling to the end of June, I think we're looking to still complete, you know, 40,000 meters of growth drilling in the second half of the year. But beyond that in FY23, we have a very substantial growth drilling program planned again, so that's incredibly exciting.
- We have the feasibility study coming in and again, although that pre-feasibility study was centred around 2 million tonnes per annum of ore, we did flag that the feasibility study would be looking to take that up to around 3 million tonnes per annum. Now I think 3 million tonnes per annum is about as much as a single decline access can do.
- So, look it could be a little bit over, a little bit above. My sense is, you know, that will come up and that could be as much as a 50% increase in mining rates which is, you know, that in itself is tremendous growth.
- Our decline continues to advance very positively. And remember the Permian zone we're mining through is not homogeneous. As you get deeper through it, it’s had more time, more pressure. It's a more solid mass and that allows longer cuts and more efficient mining methodology.
- So, I think that's very exciting. And you know, we expect and hope to see and plan to see mining rates.
- So, coupled with the evolution of the mining methods at site where we start with the sub-level open stope, but then we have the opportunity to bring in these bulk mines.
- And when you hear Sandeep speak, he talks about ultimately having one mine and two mining methodologies. This sub-level open stoping down this high-grade SE Crescent. But then opening up the broader Havieron with these with potentially block caving or at least bulk mining methodologies. And you know that is tremendous growth to have sitting inside our known ore zonation.
And from SI Capital Podcast in July:
* Yeah I think that's a great great point that you don't necessarily, your hurdle rate requirement for a commercial discovery right now, it's a lot well it's a lot smaller than Hav, Hav broke through that critical mass requirement and quite well exceeded that but it's good to see a system like that is a big ore body and it's just and it gives us an indication that potentially a long strike, there might be that same powerful geological processes which will show up these alterations these textures like you said about the brecciations, these trapped structures where we can be finding the gold and vectoring into where we need to or where the team needs to start looking on next but I guess one last point on the exploration areas , you do have still these other JV’s with Newcrest and you're still operating them, can you talk a little bit about that?
- yeah so look at a couple of ways to comment on the last comments
- look when you do a relatively basic volumetric calculation on Havieron taking into account grade zonations, you can get a broad brush understanding of a 20 million ounce full body and that's worth pausing … on a 20 million ounce ore body
- but what we have is the area long strike to that northwest at our 100% owned Scallywag in particular and then it goes on to that JURI JV ground that you mentioned
- it's rare something like a Havieron of that scale is an orphan so again it's a cracking place to be looking, we have a drill rig spinning as we speak, RC rig that's doing effectively the pre-collars getting through the Permian layer which is a cheaper quicker and more efficient way to get that in place and then we're going to come back in with the diamond drill rig to bring out core
* Telfer is close by and has processed over 20Moz over time, how much is that worth compared to the current value of GGP?
- They are comparatively close at 45km away so we can share infrastructure as it is a truckable distance
- Telfer has been in operation for some 35 years and it has taken them this long to process and mine around 13m of those ounces
- Perhaps puts it into context as to why this sits in a major and if you go back in time, what would you pay for Telfer at its dawn…..it would have been an eye watering sum as it has been a grand old lady of Oz mining
- Like to think Havieron has a similar opportunity and to understand if it is of a similar 20Moz endowment could take 3 to 5 years of drilling out to understand and unlock
- Havieron goes down to some 1350 vertical metres and still open, the logistics of drilling down 1350m plus cover at an angle are intensive, so as the decline is put in place it will enable underground drilling platforms which will accelerate, economise and decrease the cycle time of information
- Speed of exploration and drill information is going to continuously accelerate as Havieron develops over the next 3 years and will help unlock the value.
And then in 2nd Interview with GGPHelp's own Liam talking about future growth at Havieron:-
* So how then, because obviously there's a lot of Capex needed to get that far, the transition to growth - how do Greatland grow from here?
- Well, let me answer that in in two parts. Firstly, just because in the preface, you talked about a lot of Capex, one of the brilliant elements of this and indeed of the joint venture with Newcrest is that Newcrest is effectively developing this as a mid-cap would, which is tailor made for Greatland’s balance sheet.
- What are we doing? We're driving in and developing the SE Crescent hitting that high grade ore, we're going to then take that through and process it and then have ounces of gold and tonnes of copper to sell and that will generate cash flow and then we can reinvest that into the mine to continue to grow that, continue to advance the decline to all the way to the bottom of the SE Crescent.
- But that also opens up additional access to these additional mining areas. It opens them up in terms of infrastructure so that when we do want to open them up for mining, we're sitting right next to them but also opens them up for drilling.
- Once you can put in an underground drill rig sitting right next to the Eastern Breccia or halfway down the decline to drill out that Northern Breccia, it's a shorter drilling length and that is obviously cheaper, but equally it shortens the cycle time for information. (Reporting cycle between results).
- So, you have these beautiful, you know, positive kind of feedback where drilling is cheaper and quicker and you understand those elements of the ore body quicker. And because you have infrastructure already near those elements, the potential to bring them on as mining zones is also improved both economically and from a time perspective.
- If I answer your question in the second part, which was talking about you know, how do we see the expansion?
- Well, we've got the ongoing growth drilling to the end of June, I think we're looking to still complete, you know, 40,000 meters of growth drilling in the second half of the year. But beyond that in FY23, we have a very substantial growth drilling program planned again, so that's incredibly exciting.
- We have the feasibility study coming in and again, although that pre-feasibility study was centred around 2 million tonnes per annum of ore, we did flag that the feasibility study would be looking to take that up to around 3 million tonnes per annum. Now I think 3 million tonnes per annum is about as much as a single decline access can do.
- So, look it could be a little bit over, a little bit above. My sense is, you know, that will come up and that could be as much as a 50% increase in mining rates which is, you know, that in itself is tremendous growth.
- Our decline continues to advance very positively. And remember the Permian zone we're mining through is not homogeneous. As you get deeper through it, it’s had more time, more pressure. It's a more solid mass and that allows longer cuts and more efficient mining methodology.
- So, I think that's very exciting. And you know, we expect and hope to see and plan to see mining rates.
- So, coupled with the evolution of the mining methods at site where we start with the sub-level open stope, but then we have the opportunity to bring in these bulk mines.
- And when you hear Sandeep speak, he talks about ultimately having one mine and two mining methodologies. This sub-level open stoping down this high-grade SE Crescent. But then opening up the broader Havieron with these with potentially block caving or at least bulk mining methodologies. And you know that is tremendous growth to have sitting inside our known ore zonation.
And from SI Capital Podcast in July:
* Yeah I think that's a great great point that you don't necessarily, your hurdle rate requirement for a commercial discovery right now, it's a lot well it's a lot smaller than Hav, Hav broke through that critical mass requirement and quite well exceeded that but it's good to see a system like that is a big ore body and it's just and it gives us an indication that potentially a long strike, there might be that same powerful geological processes which will show up these alterations these textures like you said about the brecciations, these trapped structures where we can be finding the gold and vectoring into where we need to or where the team needs to start looking on next but I guess one last point on the exploration areas , you do have still these other JV’s with Newcrest and you're still operating them, can you talk a little bit about that?
- yeah so look at a couple of ways to comment on the last comments
- look when you do a relatively basic volumetric calculation on Havieron taking into account grade zonations, you can get a broad brush understanding of a 20 million ounce full body and that's worth pausing … on a 20 million ounce ore body
- but what we have is the area long strike to that northwest at our 100% owned Scallywag in particular and then it goes on to that JURI JV ground that you mentioned
- it's rare something like a Havieron of that scale is an orphan so again it's a cracking place to be looking, we have a drill rig spinning as we speak, RC rig that's doing effectively the pre-collars getting through the Permian layer which is a cheaper quicker and more efficient way to get that in place and then we're going to come back in with the diamond drill rig to bring out core
“Study the past if you would define the future.” ― Confucius
Re: Growth of Havieron
Still a lot of room to expand to the SE.
This plan with the black outline was my thoughts when HAD90 came out.
Arguably one of our deepest and longest drills.
I’ve highlighted the intercept by the figure “A” that’s way below where 104 finished.
The Eastern Breccia can only increase in size eastwards and downwards, with the slope of the Dyke following it.
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Re: Growth of Havieron
Underground water courses towards Lake Dora through the aquifers.
One of the reasons they are stoping and backfilling to minimise disruption
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Re: Growth of Havieron
Just found this one, I don’t recall where I obtained this one.
Dec 20 to Mar 21
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Re: Growth of Havieron
From the NCM March and September Quarterly update
Their dimensions are creeping upwards
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Re: Growth of Havieron
This is Ggp plan from the last update which is 50m lower than the NCM March update
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lebugue-addick
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Re: Growth of Havieron
Hi Bamps
Great work, thanks for keeping up the momentum. I am very much looking forward to next Thursday's latest drilling results. It will also be interesting to hear what Shaun has to say tomorrow. So much news eagerly awaited.
Great work, thanks for keeping up the momentum. I am very much looking forward to next Thursday's latest drilling results. It will also be interesting to hear what Shaun has to say tomorrow. So much news eagerly awaited.
"If I said you had a beautiful ore body would you hold it against me?" 
Re: Growth of Havieron
That image background is a blast from the past!
Before any triple digit numbers were in use and fan drilling....
The current pretty picture of the ore body seems to approach the kilometre mark with a bit of a lower bulge, as we go deeper. I need to plan some beauty sleep before the late night on the 21st for the next set of drilling results.
Before any triple digit numbers were in use and fan drilling....
The current pretty picture of the ore body seems to approach the kilometre mark with a bit of a lower bulge, as we go deeper. I need to plan some beauty sleep before the late night on the 21st for the next set of drilling results.
Read on, the next poster will cover it all better....
Re: Growth of Havieron
The modelling plans keep changing slightly depending whether you’re looking at NCMs or Ggp plans but they’re all sort of merging in to a clearer shape.
In London I asked a question about the size to Shaun and he looked a bit bemused by it
, so there’s nothing different to the rest of you where my thoughts are concerned .The question was when will we be updated with a revised size of the ore body from the quoted 650x350?
Since then plans are showing increases, in fact I can’t find a plan scaling to those dimensions to me they are outdated.
Some plans are showing larger increases but covers alteration extents so are extremes.
700m seems to be a minimum length and 450m the average width in the first 1000m.
There is one zone on the NE side that has pinched in to 300m.
The only way I can describe that pinch point is like holding a plastic cup and pressing with your finger on one side.
In conclusion I believe the ore body to be 700x450 down to 900m and then starts to expand at 1000m depth to 800m x 500m.
1050m depth = 900x 500m
My assumption 1300m depth 1200m x 600m
The length is increasing as the ore body follows the Dyke’s decline eastwards.
The width is increasing as it takes in the Eastern Breccia
The ore body is in and out all over the place so not a perfect ovoid.
The gap zone what we keep hearing about is the zone between the SE Deeps and the Eastern Breccia which has had little drilling apart from drill 90 so these pads should becoming from the west
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RationalAssessor
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Re: Growth of Havieron
Interesting post Bamps. Got me thinking whether the orebody was really "pinched" or was it that there was no evidence available to prove that there was something at that particular level? The diagrams in your post suggest that we have significant drill coverage, but we could find that the area of drill coverage is particularly small at some levels. That's why I'd love to see some sort of 3D model of the drilling to better visualise the coverage and where the hits are.
Re: Growth of Havieron
The top of the ore body is the less drilled zone probably the top 100m as most of the drills are coming in from the side.
One of the sections show this pinch point, I will try and find it
One of the sections show this pinch point, I will try and find it
Re: Growth of Havieron
Bearing in mind they are quoting an ovoid of 650x350 and this section S1 is skewed diagonally across, which would have an effect of lengthening the measurements.
At first glance I was amazed how it’s shrunk in the middle.
Scaling across from the top red line downwards:-
450m
280m
380m
350m
650m
750m
Short green line is 850m deep
Long green line is 1100m
My calcs go to 1300m
That would make the width 900m
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Re: Growth of Havieron
Calculations 2/9/22
Top ovoid
176,000 sqm
X depth 900m
= 158,400,000 cu.m
X specific gravity 2.7
= 427,680,000tons
X average 0.75g/t
= 320,760,000grams
Divide by 31.1
= 10,313,826oz
Bottom ovoid
Size 750x550m
323,000 sq.m
X depth 400m
=129,300,000 cu.m
X 2.7 sg
=348,840,000 tons
X 0.75g/t average
= 261,630,000 grams
Divide c 31.1
= 8,412,540oz
Top ovoid
176,000 sqm
X depth 900m
= 158,400,000 cu.m
X specific gravity 2.7
= 427,680,000tons
X average 0.75g/t
= 320,760,000grams
Divide by 31.1
= 10,313,826oz
Bottom ovoid
Size 750x550m
323,000 sq.m
X depth 400m
=129,300,000 cu.m
X 2.7 sg
=348,840,000 tons
X 0.75g/t average
= 261,630,000 grams
Divide c 31.1
= 8,412,540oz