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2 results for “strip ratio mining” in Mining
Mining · 5 August 2026
Grade, Cut-off and the Arithmetic of an Open Pit
…decision, not a geological fact: a higher gold price literally converts waste into ore. · Strip ratio — waste tonnes moved per ore tonne — is often the difference between a viable pit and an abandoned one. · Reserves are the economically mineable subset of resources under a state…
Amara Okonjo · 16 min read
Mining · 22 May 2026
The Other Supply Chain: Artisanal Mining and the Mercury Problem
…ation 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 requires no capital or literacy in chemist…
Amara Okonjo · 12 min read
