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3 results for “mine rehabilitation cost” in Mining
Mining · 5 August 2026
Grade, Cut-off and the Arithmetic of an Open Pit
A gold mine is not a hole with gold in it. It is a spreadsheet with a hole attached — and the single number that decides which rock is ore and which rock is waste moves every time the price does. ·…
Amara Okonjo · 20 min read
Mining · 22 May 2026
The Other Supply Chain: Artisanal Mining and the Mercury Problem
…finance and a neurotoxin. Formalisation is the stated solution. Nobody agrees on what it costs. · Artisanal and small-scale mining employs millions and is the largest source of anthropogenic mercury emissions. · Mercury amalgamation persists because it is cheap, fast and require…
Amara Okonjo · 15 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 m…
Amara Okonjo · 18 min read
