Greetings:
A few things stand out from the drill data available. Some of these are perhaps misconceptions, misinterpretations, or just strange...
#1. "Actual thicknesses are only 90% of intersections."
Oh really? Well, if the dyke dips to the east at 12 to 15 degrees, the operative question is, "What is the cosine of 12 to 15 degrees. The answer is 0.97 approximately. Therefore, the true thickness of the dyke should be 97% of the quoted values. In other words, given an intersection of 3.3 metres, the true thickness should be 3.2 metres. If the average intersection is 2.5 metres, the average true thickness would be 2.425 metres. The difference is rather small. One could elect to use the larger number and still be very close. The specific gravity of the kimberlite isn't known by us to within 3%, after all. :-)
#2. "The average dyke intersection is 2.57 metres."
Oh really. No it isn't. The average of all drilled holes is that. Unfortunately, most of the holes are drilled in a very small area on the northwest peninsula.
So...let's look at teach grid square.
M12 ..... 2.4 metres ...... 1,000,000 prob.
M13 ..... 2.5 metres ...... 1,000,000 prob.
L11 ..... 1.7 metres ........ 350,000 prob.
L12 ..... 2.6 metres ...... 1,000,000 prob.
L13 ..... 2.9 metres ...... 1,200,000 prob.
L14 ..... 3.4 metres ...... 1,350,000 prob.
L15 ..... 2.5 metres ...... 1,000,000 possible
L16 ..... 2.4 metres ...... 1,000,000 possible
K11 ..... 2.4 metres ........ 750,000 proven
K12 ..... 2.7 metres ...... 1,100,000 proven
K13 ..... 3.2 metres ...... 1,300,000 proven
K14 ..... 2.5 metres ...... 1,000,000 probable
J11 ..... 2.8 metres ........ 750,000 proven
J12 ..... 2.5 metres ...... 1,000,000 proven
J13 ..... 2.0 metres ........ 800,000 proven
TOTAL ... 2.7 metres ..... 14,600,000 tonnes
Of these, 5.7 million tonnes are, in my mind, proven. A further 6.9 million I class as 'probable', and an additional 3 million tonnes are possible based on the data.
The ore remains open to the north, and east.
Given a suitably high valuation, the dyke may be minable to a one metre cutoff. This adds the following tonnages:
J14 ..... 1.2 metres ........ 500,000 probable
J15 ..... 1.0 metres ........ 400,000 probable
I11 ..... 1.3 metres ........ 400,000 proven
I12 ..... 1.5 metres ........ 600,000 proven
I13 ..... 1.7 metres ........ 650,000 proven
I14 ..... 1.0 metres ........ 400,000 probable
Clearly, the tonnage is growing rapidly. As far as I can ascertain...everything is well on track.
Regards,
WillP
Oh...one last thing...if you look closely, you can probably see the missing hole dots on the map. They align exactly with the grid lines.
Regards,
WillP |
