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2 results for “metal detecting finds” in Mining
Mining · 5 August 2026
Grade, Cut-off and the Arithmetic of an Open Pit
…gold ore is typically around one to two grams per tonne — roughly a gold ring's worth of metal in a truckload of rock. · Cut-off grade is a price-dependent accounting decision, not a geological fact: a higher gold price literally converts waste into ore. · Strip ratio — waste to…
Amara Okonjo · 16 min read
Mining · 22 May 2026
The Other Supply Chain: Artisanal Mining and the Mercury Problem
…at the mine site, paying same-day. None of this is a breakthrough. It is plumbing. · The metal that emerges from these pits is chemically identical to the metal poured in a refinery in Switzerland, and once refined it carries no record of its origin. That is the fundamental asym…
Amara Okonjo · 12 min read
