Math on original
posted on
Dec 22, 2010 02:15PM
The attached table summarizes the Black Creek chromite mineral resource estimate at a cut-off grade of 30 per cent chromium (III) oxide.
SUMMARY OF BLACK CREEK CHROMITE RESOURCES Category Tonnes Avg. Cr2O3 (%) Cr:Fe Ratio Measured (M) 3,729,000 39.90 1.8 Indicated (I) 1,985,000 40.06 1.8 Total M & I 5,714,000 40.00 1.8 Inferred 2,726,000 40.99 1.9
NR indicates.... 200M strike length and 65M average width and 175 thickness....
thus sp G would be about 3.7 to equal 8.4 MM tones total
I think 3.7 is a little high but that what makes this add up.
200 x 175 x 65 x 3.7 = 8.4 MM tones
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2nd 43 101
Drilling confirmed increase in strike length of 115 meter tto 315M and additional depth to 320 meters.
If the width remains constant then the math works out like this:
315 x 320 x 65 x 3.7 = 24 MM tones
Thats a pretty big discrepancy especially when the cutoff has been reduced from 30 to 20%
Something just doesn't add up here!
The table summarizes the Black Creek chromite mineral resource estimate at a cut-off grade of 20 per cent Cr2O3 including internal waste.
SUMMARY OF BLACK CREEK CHROMITE RESOURCES Average Category Tonnes Cr2O3 (%) Cr:Fe ratio Measured (M) 5,256,000 37.00 1.8 Indicated (I) 3,389,000 38.04 1.8 Total M&I 8,645,000 37.41 1.8 Inferred 1,610,000 37.78 1.7