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3 results for “buried treasure history” in Mining
Mining · 19 August 2026
Nine Grams a Tonne
…am per tonne or below, a decline of well over an order of magnitude across the industry's history, driven not by any single mine's decline but by the systematic exhaustion of higher-grade deposits and their replacement, in the production mix, by larger and lower-grade ones. · The…
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. · Mo…
Amara Okonjo · 20 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
