commercial sieve

Heading to the CH-7 bulk sample results, one can look at earlier micro caustic results and focus on the commercial sieves as a precursor to the upcoming results.

That would be the 0.85 mm sieve and more importantly the 1.18 mm sieve that Peregrine has chosen to go with for this bulk sample.

Here are some results of both caustic analysis and bulk sample analysis:

Highlighted the 0.85 mm sieve and a cumulative stone count for anything above 1.18 mm sieve. Also included is a one of the lower sieves 0.3 to 0.425 mm for reference.

Those results above are at various samples weights.
The data below shows the same data normalized to a 200 kg sample. This is the approximate weight of a standard caustic sample that Peregrine uses.

What does this tell us?

For one, it clearly shows how superior domain 5 is for ch-7. It has the highest stone count in the 3 sieves indicated. Clearly beats ch-6 micro information.

For two, it is interesting that the ch6 bulk (done at surface) comes in at 5.1 stones per 200 kg...yet the mini bulk that involved thick core drilling deeper underground came up with 5.6 stones per 200 kg on that commercial sieve. On top of that, the normal core drilling throughout the body came in at an average of 10.5 stones per 200 kg. This could mean that a 404 tonne scrap at surface may be under estimated the overall grade of ch-6. They had planned a large LDD RC drill hole this past winter, but weather conditions did not allow for this extra hole. The hole might have justified the theory that the data is showing.

For three, domain 4 is head to head with domain 3 in the early sieves and then doubles in the commercial sieve. It has a remarkable coarse distribution and could have some nice big stones in the bulk sample.

Bulk sample grade results for domain 2 through 5 will be coming out over the next 3 to 6 weeks.