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Gold/Mining/Energy : Canadian Diamond Play Cafi

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To: WillP who wrote (7588)

1/3/2014 2:25:41 PM

From: WillP

Read Replies (2) of 16207

Here are some historical diamond counts for various deposits. They all pretty much weigh the same.

The challenge is: Estimate a grade per tonne and if you can, try to name the deposit.

Weight 0.106 0.15 0.212 0.3 0.425 0.6 0.85 1.18 1.7 2.36 3.35 4.72
999.4 1132 971 602 407 215 130 65 28 13 2 1 0
998.7 2180 1244 813 549 283 198 111 49 23 7 2 0
1001.1 na na na na 105 90 45 17 8 4 1 0
1000.8 906 652 429 283 171 92 31 15 7 3 1 0

I'll give the answers later on....

And the answers are:
The first one is the 3,314 kilograms reported in mid-December for Kelvin. Its 0.85-millimetre-sieve grade was 3.45 carats per tonne.

The second one is the 569.1 kilogram core drilling test of CH-6, reported in 2009, which averaged 8.0 carats per tonne on a 0.85-millimetre sieve.

The third one is the 14.1-tonne core drilling test of CH-6 completed in December 2010. It averaged 2.84 carats per tonne on a similar sieve. (The diamonds from 0.425 to 0.85 mm are from the check sample processed concurrently.)

The final one is the 222-tonne surface excavation test of CH-6 completed in December 2013. It averaged 2.70 carats per tonne on a similar sieve. Again, the counts for the smaller sieve sizes are from the concurrent check sample.

Interesting, yes?

WillP

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