Have you heard of mining studies? That's what you do before you mine so you know what you're mining will turn a profit.
Ounces = Tonnes x Grade
One hole doesn't define any tonnage which might translate to ounces to pay for the massive costs involved mining through 50m of dirt.
You need to do some reading: http://www.stantec.com/content/dam/stantec/files/PDFAssets/2014/Hard Rock Miner's Handbook Edition 5_3.pdf
Have you heard of mining studies? That's what you do before you...
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