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3 results for “Troy ounce” in Mining
Mining · 5 August 2026
Grade, Cut-off and the Arithmetic of an Open Pit
…t model. Companies restate them annually; a lower price assumption can delete millions of ounces from a reported reserve without a single rock changing composition. · Why does it take so long to build a new gold mine? Resource definition drilling, feasibility studies, environment…
Amara Okonjo · 20 min read
Mining · 19 August 2026
Nine Grams a Tonne
What does it actually cost to pull an ounce of gold out of the ground? The honest answer runs through grade decline, energy and water bills, permitting delays and the closure liabilities nobody prices until the mine is already e…
Amara Okonjo · 18 min read
Mining · 22 May 2026
The Other Supply Chain: Artisanal Mining and the Mercury Problem
A significant share of the world's gold is produced by people working with hand tools, informal finance and a neurotoxin. Formalisation is the stated solution. Nobody agrees on what it costs. · Artisa…
Amara Okonjo · 15 min read
