Oxidation Pit
nounPronunciation: /ˌɒksɪˈdeɪʃən pɪt/
An excavated or naturally occurring depression in abandoned mine workings where exposed sulfide minerals undergo rapid oxidation when exposed to atmospheric oxygen and water. These pits become sources of concentrated AMD generation and sustained metal leaching into groundwater.
Plain English
A mining excavation where sulfide minerals exposed to air and water create acid and release metals into groundwater.
Etymology & History
Usage
"The oxidation pit at the abandoned sulfide mine became a primary contaminant source requiring capping with water-impermeable material."
Style guide notes: Use 'oxidation pit' specifically for active sulfide oxidation zones; avoid conflating with general mine excavations.
Also known as
Contrasted with
Related Terms
Frequently Asked Questions
How can oxidation pits be managed in reclamation?
Capping with compacted clay, installation of water covers, or backfilling with inert material prevents atmospheric oxygen contact and oxidation.
What makes oxidation pits particularly hazardous?
Their concentrated metal leaching creates hotspots of contamination that persist despite general site remediation measures.
Why Test Candidates on This?
Identifying and managing oxidation pits demonstrates understanding of geochemical processes in mine closure.
Required skill level: Mid