Sunday, January 21, 2024 4:56:06 PM
the concentration process involved reducing a 50-pound bulk sample down to a 29-gram concentrate. We need to compare apples to apples (same units) so think of 50 pounds as 800 ounces. They took an 800 ounce bulk sample, concentrated all the gold down into a 1 ounce sample. Therefore, it was an 800-fold concentration. NOT 40 fold.
You're almost there: Estimated Gold Density in Stockpile = Assay of Concentrate / Rate of Concentration Correct!
But the rate of concentration is 800, not 40. If you do the math, using the correct concentration factor of 800 (117 oz/ton divided by 800), you get 0.14625 oz/ton. Nowhere near 2.925 oz/ton, off by a factor of 20.
By the way, the "density" of pure gold is ALWAYS 19.3 g/cm3. The "concentration" of gold in a stockpile is what you probably mean to say. You could also say percentage, or assay, or tenor. But not density.
Do your own research, use third-party sources, and don't buy into the hype.
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