RE: MONSTER RESOURCE HERE16 Jan 2021 21:09
1/3
Enjoyed reading the posts today and been grateful of feedback form this bb before so just thought I'd contribute a few thoughts. If glaring errors please don't hold back I'm just trying and happy to learn, like many I expect.
Using the slice of the block model from pg14 of the July presentation. I've constructed an excel spreadsheet and input the ~39 rows of data provided for the said slice. I assume it is one of the best slices. Using the key for the coloured blocks and using the mid point of the stated Cu ppm ranges designated to each colour. I counted how many blocks of each colour on each row. I assigned a row of the spreadsheet to a row of the block model.
The spreadsheet is simple just column headers of; row No., green, light blue, dark blue, yellow, light orange, orange, dark orange, red, light pink and pink.
The rows are designated by row number.
For example the bottom row of blocks shown on the diagram (sillily my row 1) are entered as..... (the numbers that follow are the total number of blocks (with some fractional estimation - 0.5s)) starting with total light blue (I ignored green).
10, 5, 5, 3, 0, 0, 0, 0, 0
2nd row up
13, 0, 3, 4, 1, 0, 0, 0, 0
3rd row up
8.5, 6, 2, 6, 0, 0, 0, 0, 0
etc
Next I had a full (all same) column of block tonnage currently x ((14 x 14 x 14) x 2.2).
Next I repeated the first section of the spreadsheet (save the row No.) in order to calculate the contained copper in each grade range in each row (very quick given existing work done).
Assuming a homogeneous sg of 2.2 and a block size of 14m x 14m x 14m giving a block tonnage of 6036t I could then use the spreadsheet to quickly (relatively) calculate the contained copper within each row, or the percentage of the slice that is modelled to be a particular grade, or in the same way, any particular row.
Blocks appear reasonably square on the slice diagram so I considered as cubic. Block height was estimated from the vertical scale on the below diagram and used estimated relative levels of 1125m - 580m to give the 545m vertical depth to the pictured deposit, then divided by number of blocks shown vertically - 39 to arrive at the 14m dimension.
https://www.rns-pdf.londonstockexchange.com/rns/3902L_1-2021-1-12.pdf
AIMO