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Hi Prof really appreciate the response and apologies for the late reply but I had to work today.
I see what you are doing in averaging out the Au containing intercepts and then dividing the resource estimate by 10 to allow the fact that the average grades of the intercepts are (unfortunately:) not continuous throughout.
As I said I am pretty novice with mining and maybe your working out is a normal practice best estimate.
The way I would have thought it myself would be average Gram per tonne over the whole 1200m drilled and then multiply, as you have done, by strike volume and then tonnes per m3.
The 6 drill holes assumed 200m each
• 16m @ 1.07g/t Au from 69m
• 10.4m @ 2.14g/t Au from 191m
• 23m @ 1.53g/t Au from 143m
• 2.25m @ 7.74g/t Au from 155.8m
• 1.45m @ 16.0g/t Au from 52m
• 1m @ 40.0g/t Au from 90m
Total depth/intercept length.....Grams per tonne/(drill depth/intercept length)
200m/16m = 12.5 ...... 1.07gpt/12.5 = 0.086gpt average over 200m depth
200m/10.4m = 19.2 .... 2.14gpt/19.2 = 0.111gpt average over 200m depth
200m/23m = 8.7 ........1.55gpt/8.7 = 0.178gpt average over 200m depth
200m/2.25m = 88.9 .....7.74gpt/88.9 = 0.087gpt average over 200m depth
200m/1.45m = 137.9 .....16.0gpt/137.9 = 0.116gpt average over 200m depth
200m/1m = 200 ..........40.0gpt/200 = 0.2gpt average over 200m depth
Total 0.778gpt/6 holes = 0.13gpt average of all six holes over 200m depth.
1) Estimated Tonnage = [1000m x 500m x 200m] x 2.4 T/meter cube = 240,000,000 T2)
Based on the above average of 0.13g/T, the calculation will become:
(2) In grams = 240,000,000 T x 0.13g/T = 31,200,000g
(3) In ounces = 31,200,000 /34.2857 (Not dividing by factor of 10) = 910,000 oz
(4) Recovery 80% = 910,000 oz x 80% = 728,000 oz.
Again thinking about this the way I have worked it out assumes there was only gold found in the stated intercept grades and zero grams of gold in the rest, which would be highly unlikely, although when mining this would they not just be chasing the high grade intercepts?
If so then I think your original 2.87gpt average figure would be accurate for economical mining viability but maybe not for estimating the resource?
Either way you work this out there is a lot of gold just in Kwademen alone and there are lot more fingers in a lot more pies here.
Hi Jaylarc
In the earlier workings, which was the subject of your query, I took only a percentage of each hole's output, based on meters shown per hole as a proportion to the total meters. This gives the same result. Please let me know if you think this needs correcting and I will re-work.
Hi Jaylarc
Apologies for coming back late on your query:
Broadly, if you take the product of each line in my earlier workings, you will arrive at the total of 155.19 and divide this by the total of 54.1 drilled meters, it will give you 2.87 average per meter:
16 x 1.07 = 17.12
10.4 x 2.14 = 22.26
23 x 1.53 = 35.19
2.25 x 7.74 = 17.42
1.45 x 16 = 23.2
1 x 40 = 40
Please let me know if you think this is not what you expected.
Professor thanks for the details posted but I cant get my head around your working out for the average gram per tonne.
% OF EACH DRILL Grams per Tonne
----------------------- -----------------------
29.57% 0.32g
19.22% 0.41g
42.51% 0.65g
4.16% 0.32g
2.68% 0.43g
1.86% 0.74g
--------
AVERAGE 2.87g
=====
I am a bit of a novice in mining stocks and picking pieces up, I would be very grateful if you could explain your calculations further.
Cheers
Amazing work Professor1.
We should start paying you for these detailed posts.
.......CONTINUED
TAKING No. 8 KWADEMEN INITIAL DRILL RESULTS AND ESTIMATING RESOURCE......
I was impressed by Kwademen past drill results. It may turn out that Kwademen and Kwademen South are linked and this forms one long target zone.
At Kwademen, historical work has returned several encouraging gold intercepts in broadly spaced drilling
(~200m to 300m line spacing) including:
• 16m @ 1.07g/t Au from 69m
• 10.4m @ 2.14g/t Au from 191m
• 23m @ 1.53g/t Au from 143m
• 2.25m @ 7.74g/t Au from 155.8m
• 1.45m @ 16.0g/t Au from 52m
• 1m @ 40.0g/t Au from 90m
"Soil sampling conducted by Panthera over the last two years has shown that this drilling is located to the
west of the main gold in soil anomaly and also west of the area of artisanal mining activity (Figure 3). The
main part of the gold in soil geochemical anomaly and associated artisanal gold mining activity CAN THUS BE SEEN TO REPRESENT A HIGHLY PROSPECTIVE 'WALK-UP' DRILL TARGET, with over 1,000m of strike potential."
Based on the above statement in the RNS (i.e. these (HIGHER GRADE) results are from the WEST OF THE MAIN SOIL ANOMALY AND CAN BE TAKEN AS REPRESENTATIVE OF THE MAIN TARGET ZONE), I have attempted to see what sort of resource we are likely to get at Kwademen (North):
ASSUMPTIONS / PARAMETERS USED:
(a) Strike length - given 1km (=1000m)
(b) Depth =It appears from the above drills that they have drilled up to 200m
(c) Width =Not given - Hence I will give 2 estimations based on 500m and a reduced width of 300m
(d) Density for the area = assumed industry average in west africa = 2.4 Tonnes / meter cube
(e) As with Labola, I have taken only 1/10th of the total calculations to account for the fact that some high grade outliers are ignored as they could be in isolation and the width and depth may not be the same throughout the whole strike length. I have indeed also reduced the strike length itself by taking only 1/10 of the overall result in case it was not continuous throughout.
(f) Recovery rate of gold = 80%
So, here goes:
1) Estimated Tonnage = [1000m x 500m x 200m] x 2.4 T/meter cube = 240,000,000 T2)
(2) The average grading works out to be 2.87grams per tonne as follows:
% OF EACH DRILL Grams per Tonne
----------------------- -----------------------
29.57% 0.32g
19.22% 0.41g
42.51% 0.65g
4.16% 0.32g
2.68% 0.43g
1.86% 0.74g
--------
AVERAGE 2.87g
=====
Based on the above average of 2.87g/T, the calculation will become:
(2) In grams = 240,000,000 T x 2.87g/T = 688,000,000g
(3) In ounces = 688,000,000 /34.2857 AND dividing by factor of 10 = 2,006,667 oz
(4) Recovery 80% = 2,006,667 x 80% = 1,605,334 oz.
** If the width was only 300m as opposed to 500m, the end result would be 965,000 oz **
BEEN RE-CAPING OUR BIDO PROJECT FOR ALL THE BENEFIT OF ALL THOSE WHO JOINED RECENTLY
The target strike on the map on page 27 of the doc appears to be 8 to 9 km long and between 3 to 6 km wide in places.
The number of targets in this documents are shown to be no less than 9, namely:
1)BIDO VEIN
2) SOMIKA MINE
3) POUNI WEST (to the west of BIDO)
4) POUNI (to the east of BIDO)
5)KAGA VEIN (to the south of SOMIKA)
6) POUNI SOUTH
7) OLD ORPAILLUER AREA (to the south of POUNI WEST)
8) and to the west of all of the above KWADEMEN (north) and
9) KWADEMEN SOUTH(to the south of KWADEMEN)
**** MOST IMPORTANT OF ALL, the map is GEOCHEM COLOUR CODED and ALL OF THE TARGET AREAS ARE MOSTLY SHOWN IN DARK RED IMPLYING = MORE THAN 500 ppb gold **** - ******(MATCHING THE GRADES ON OROSUR MINING LTD GEO MAP)*****
TAKING No. 8 KWADEMEN INITIAL DRILL RESULTS AND ESTIMATING RESOURCE.................................(CONTINUED)