RE: Guys we are being shorted23 Aug 2019 09:22
Copper content calculations:
Volume = Length x Width x Thickness
Tonnage = Volume x Specific Gravity (Density)
Grade is grade in % content of Cu metal
Hence on a very basic calculation / estimate, if you have continuous / homogenous mineralisation within an area of 300 m x 650 m and it is 10 m thick and after doing countless S.G. tests on your core, you have an average S.G. for the mineralised material as say, 2.9 (no units), the tonnage will be: 300 x 650 x 10 x 2.9 = 5,655,000 tonnes of material.
If the grade of that material is 1% copper (assuming a uniform grade for the sake of this, which it isn't usually). The tonnage of copper in the material will be 1% x 5,655,000 t or 5,655,000 x 0.01 = 56,550 tonnes of contained metal.
If you want to estimate the in-situ value of that then multiply by the copper price (cash, this am) of US$ 5,667.50 to get US$ 320,497,125.
Of course, these are just back of the envelope figures. You need to assume mining factors (extraction and dilution) , processing efficiencies etc. and a whole load of other factors but this gives you a figure to kick around (and down!).
Obviously, you could double the area and half the grade if the mineralisation's there etc.