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3 results for “late veneer hypothesis” in Mining
Mining · 5 August 2026
Grade, Cut-off and the Arithmetic of an Open Pit
…te dump. The grade at which those two quantities are equal is the cut-off, and it is calculated, not discovered. · The consequence is one of the least intuitive facts about the industry. When the gold price rises, mines do not simply earn more on the same ore; they lower their cu…
Amara Okonjo · 20 min read
Mining · 19 August 2026
Nine Grams a Tonne
…underlying gold economics. · What happens to a mine once the gold runs out? In a well-regulated jurisdiction, the operator is required to close the pit or underground workings, remove or stabilise waste rock and tailings, treat any residual water contamination, and rehabilitate t…
Amara Okonjo · 18 min read
Mining · 22 May 2026
The Other Supply Chain: Artisanal Mining and the Mercury Problem
…ciently through the lungs and is a potent neurotoxin. What escapes into waterways is methylated by bacteria into a form that accumulates up the food chain, concentrating in the fish that downstream communities eat. · The scale of the emission ASGM is assessed as the single larges…
Amara Okonjo · 15 min read
