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3 results for “acid mine drainage” in Mining
Mining · 19 August 2026
Nine Grams a Tonne
…gy and water bills, permitting delays and the closure liabilities nobody prices until the mine is already exhausted. · The industry's headline cost figure, all-in sustaining cost, still excludes major items such as exploration for new reserves and initial capital, understating th…
Amara Okonjo · 18 min read
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
…— but each shifts risk rather than eliminating it. · Traceability schemes work only where miners can actually access a legal buyer at a fair price. · Women make up a substantial share of the artisanal workforce, concentrated in processing roles that carry their own distinct mercu…
Amara Okonjo · 15 min read
