Redox zonation is the subdivision of natural environments (geochemical, ecological, or sedimentary) based on the availability of O2 to be consumed to completion by biological respiration and inorganic chemical reactions. Traditional classification scheme for sedimentary environments in oxic and anoxic is based on the amount of measurable dissolved O2 and dissolved sulfide in sediments at the time of authigenic mineral (i.e., minerals grown in situ) precipitation (Berner 1981). Classification schemes for oceanographic and ecological studies propose five principal redox zones (oxic, nitric, sulfatic, carbonic, and nitronic) based on the sequential thermodynamic availability of electron acceptors to oxidize marine planktonic organic matter (organic matter mineralization).
Redox zonations are common in natural systems especially where mixing is limited and oxygen is consumed by biological respiration and...
KeywordsAnoxic Ecological environments Geochemical environments Oxic Oxygen levels Redox potential Sedimentary environments Suboxic
References and Further Reading
- Berner RA (1981) A new geochemical classification of sedimentary environments. J Sed Petrol 51:359–365Google Scholar