Member Info for Cornishknocker

The hill keeps going up to the South for about another 1500m at four lanes so it's a non starter.

South West Aggregates gave been on the Crofty site for around 40 years, they started taking the DMS reject, a readmix plant was also on site.

On Wheal Maid, I think it is now highly likely that the decline will be reopened, probably in the next 12 months. The end of tge decline is around 10 metres from the structure currently being drilled

In October the company achieved a total development meterage of 411m or 13.25m per day - this works out to four development faces being blasted once a day.

At the time of the October updat RNS, the plans attached showed tgat there were 50m of lateral development required on the first 2 levels to reach their end point, which would take about 11 days. So they would have reached there end point by the 27th November.

Before production blasting can commence, a drop raise needs to be mined between the two levels, in a process taking about 2 weeks, although production drilling can take place while the drop raise is being mined. On tgat basis, I am expecting that stope to be open and in production in the next week.

If you look at the map here: -
https://en.m.wikipedia.org/wiki/Carn_Brea,_Redruth
The shaft near the drill site is marked, the decline is located about 1.5km North West of that shaft

No, not at all, carn brea is a granite mass that pushed up through the killas, crofty is on the northern flank, with the granite coming up at angle of around 60 degrees, with granite/killas surface contact being about 100m North of the tuckingmill decline (just the other side of the railway line). From the water level in the decline (around 70m below the portal), if you tunnel North towards carn brea, you should hit the granite in around 50m, from tgat point it will be granite all the way. The surface at the target location is about 200m above the tuckingmill portal or 250m above the water level, so tunnelling will be uphill.

1.7km is well sort of tbm territory. If you're going through carn brea it will be overwhelmingly competent granite

It's in regular use operated by South west aggregates

There's an online crushing plant at crofty, so it will be sold as aggregate, most will be granite. It will generate around 100 tonnes per day, for around 50,000 tonnes altogether

Actually its really easy, Primary entry would be from the Tuckingmill decline at South Crofty, driven on a slight uphill gradient for about 1.7km, which would take about 15 months. Ay water would naturally drain into Crofty, so theres no pumping - although if south crofty was being dewatered at the same time, you would look to take off that water before it entered crofty (Which is easy).
You would then look to rehabilitate Lyles Shaft for secondary egress and ventilation - again thats quite minor work.

The GFL off shoot at Carnkie has the potential to move the whole thing forward, in that it could give an early years good quality ore supply, while crofty is being dewatered and united downs developed.

The drill spacing required to get to a proven reserve is about 25m, so on what has been drilled so far it requires a further 390 holes - that isn't going to happen (it never does - it comes much later when mining is raking place, and is essentially the material in active stopes).

What we are looking for is measured, indicated and I ferred resources. Some of this can be classed as measured, a lot as indicated but you can infer a lot.

A maiden resource on this is going to be interesting, what they've reported so far is pointing to around $750 million in ground value. With the extensions, Trenares and Wellington Deeps, it could easily go to $5 billion.

You are probably looking at mining costs of around £60/tonne, processing at around £20/t and g&a of around £20. So a c1 cost of around £100/tonne. Which dodoesn'leave anything for sustaining capital and finance costs.

You would certainly consider 150 payable, in conjunction with bigger grades, you probably wouldn't want to base a narrow vein operation on it.

Just bear in mind this is getting deep and in proximity to a LOT of flooded mine workings. I'm not sure I would be entirely comfortable 500m below ground in that area with united and consolidated full of water.

Just putting them into monetary values: -
Ud 21-011a intercept 1 - $656/t
Ud 21-011a intercept 2 - $196/t
Ud21-11a intercept 3 - $466/t
Ud21-11a intercept 4 - $458/t
Ud21-011a intercept 5 - $300/t

It's interesting that we are seeing a swarm of mineralisation in a confined area.

Hi Rooky, typical Cornish Zonation has seen copper at shallow deaths, give way to tin with depth. This is to do with the cooling temperatures a relative densities of the two metals.

You can see on the long section the quart porphyries, these are basically the conduits for the mineralisation- if you imagine the original sedimentary rocks, these were altered by heat and pressure as the granite batholith pushed up from below.

As it pushed up it formed tension cracks in the meta sediments allowing the hydrothermal fluids sitting on top of the magma yo push up into them - these fluids then cooled leaving the lodes and quartz veins.

Some strong intercepts there, personally I don't think it justifies the current share price rises, so I'm convinced something else is going on.

I'd love to know what's coming up in tge core at Carn Brea. Anecdotal evidence (fwiw) suggests the grade is higher than the GFL, which if true could mean grades of around 5% tin over a wide width - now that would justify the price rise.

What price on a capital raise for dewatering? Personally I think if it goes to £100 million market cap, that's exactly what they'll do.

The PEA basically took the old mill flow sheet, because it works. To include XRT into it will require bulk samples for testing, which aren't available at the moment.

The scale of an ore sorting plant at hemerdon will be orders of magnitude bigger than what would be required at Crofty.

Crofty used to use DMS for its pre concentration, XRT should be considerably cheaper and more effective.

Trelavour is a really small pit (I'm talking relatively)
On this map its the small white pit on the Eastern side of the road from St Dennis to Nanpean B3279.

Blackpool is actually only about 1.5 miles (it feels much longer when driving it!) To the South East (the big flooded pit near Carpalla).
Saint Columb
https://maps.app.goo.gl/y4bGt9hAktL4wtqVA