RE:RE:RE:NEWS- Hole AR-15-54c1 Returns 27.5m at 10.09% U3O8Rover90,
I use an industry standard methodolgy for calculating my estimate. The key to my methodology is:
1. using NXE numbers for grade and intersection for each drill hole to
calculate a weighted average grade for an entire zone.
2. using NXE numbers for length and height of each zone, and then cutting that in half to account for the shape of the zones, and also to be conservative in my estimate.
3. Using NXE numbers to average width of each zone.
4. using a conservative density of 2.6 t/m3
5. using the conversion of 2204 lbs/tonne
The discrepancy between Chang's numbers and mine must be due to the area of influence he uses for each hole. My method assumes a weighted average between all holes up to 50 meters, and more, for those areas where we are waiting for infill assays. So far, infill numbers are holding up very well and actually slightly increasing overall grades of A2 and A3. For both A2 and A3 zones, it is noteworthy that my estimate is more conservative by about 100 million pounds than the more detailed approach taken by Pamps, where he breaks out the A2 high grade sub zone, and with no assumptions for infill holes that have not yet reported assays. A critical difference between PLS and Arrow, is that Arrow is entirely basement hosted, whereas PLS is a hybrid resource with both near vertical basement and flat lying unconformity hosted mineralization (aside, these two styles of mineralization have different metallurgy which requires more complex and costly milling and tailings disposal). Drilling at PLS has demonstrated that the continuity of moderate to high grades at PLS is only 10-15 meters, thus requiring much more infill drilling to better define the resources, whereas drilling at Arrow has demonstrated continuity of up to 50 meters and more. Clearly, the mineralizing processes at Arrow were far more robust and likely longer lived than at PLS.......hope you find that all helpful........
Rover90 wrote:
TeeVee sounds like Rob Chang does not agree with your 467M lbs estimate.....did you get that number from Doug? Either way....is it really credible? Are you credible?
NexGen Energy: Arrow
While NexGen (TSXV:NXE) has yet to complete its maiden resource for the Rook 1 property in the Athabasca Basin, drilling at the Arrow zone has continued to intersect high-grade uranium and expand the area. The company said it will focus the rest of 2015 on compiling data to be included in a maiden NI 43-101 resource estimate, which is due in the first half of 2016. Cantor Fitzgerald senior analyst Rob Chang said the firm estimates that Arrow contains 127.3 million pounds U3O8 at an average grade of 0.75 percent.