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3 results for “Artisanal and small-scale mining (ASM)” in Mining
Mining · 22 May 2026
The Other Supply Chain: Artisanal Mining and the Mercury Problem
…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 requires no capi…
Amara Okonjo · 15 min read
Mining · 5 August 2026
Grade, Cut-off and the Arithmetic of an Open Pit
…— ventilation, ground support, vertical haulage — costs far more per tonne than open-pit mining, so a deposit generally needs several grams per tonne or more to cover that cost. Open pits can work profitably on sub-two-gram ore because moving rock along a ramp is comparatively c…
Amara Okonjo · 20 min read
Mining · 19 August 2026
Nine Grams a Tonne
…to reach it. · What is all-in sustaining cost (AISC) and why does it matter? AISC is the mining industry's standardised measure, adopted from World Gold Council guidance, of the cost to produce and sell an ounce of gold from an operating mine, including cash operating costs, sus…
Amara Okonjo · 18 min read
