Lomagundi event

E843363
carbon isotope excursion geological event paleoclimatic event

The Lomagundi event was a prolonged Paleoproterozoic episode of unusually high carbon isotope ratios in marine carbonates, interpreted as evidence for a major global increase in oxygen production and organic carbon burial.

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All labels observed (2)

Label Occurrences
Lomagundi event canonical 1
Lomagundi–Jatuli event 1

Statements (39)

Predicate Object
instanceOf carbon isotope excursion ⓘ
geological event ⓘ
paleoclimatic event ⓘ
affects marine carbonates ⓘ
associatedWith changes in global carbon cycle ⓘ
long-term oxygenation of Earth’s surface environments ⓘ
rise of atmospheric oxygen ⓘ
duration on the order of 100 million years or more ⓘ
endTime approximately 2.1 billion years ago ⓘ
fieldOfStudy Earth system science ⓘ
geochemistry ⓘ
geology ⓘ
paleoclimatology ⓘ
follows Great Oxidation Event NERFINISHED ⓘ
geologicTimePeriod Paleoproterozoic ⓘ
hasCharacteristic large positive δ13C excursion ⓘ
unusually high carbon isotope ratios in marine carbonates ⓘ
hasConsequence changes in ocean redox conditions ⓘ
drawdown of volcanic and metamorphic CO2 ⓘ
possible climatic cooling ⓘ
interpretedAsEvidenceFor enhanced organic carbon burial ⓘ
major global increase in oxygen production ⓘ
involvesProcess burial of organic carbon in sediments ⓘ
oxygenic photosynthesis ⓘ
linkedTo changes in sulfur and iron cycling ⓘ
evolution of early aerobic ecosystems ⓘ
namedAfter Lomagundi district in Zimbabwe NERFINISHED ⓘ
Lomagundi region NERFINISHED ⓘ
recordedIn carbonate rock sequences ⓘ
marine sedimentary basins ⓘ
relatedTo Great Oxidation Event NERFINISHED ⓘ
scale global ⓘ
startTime approximately 2.3 billion years ago ⓘ
studiedUsing stable carbon isotope geochemistry ⓘ
stratigraphic correlations ⓘ
temporalRelation occurs after initial rise of atmospheric O2 in the Paleoproterozoic ⓘ
precedes later Proterozoic oxygenation events ⓘ
uncertainty exact duration and global synchronicity remain debated ⓘ
magnitude of associated atmospheric O2 increase is uncertain ⓘ

Referenced by (2)

Full triples — surface form annotated when it differs from this entity's canonical label.

Lomagundi–Jatuli carbon isotope excursion → alsoKnownAs → Lomagundi event ⓘ
Lomagundi–Jatuli carbon isotope excursion → alsoKnownAs → Lomagundi event ⓘ
this entity surface form: Lomagundi–Jatuli event