Re‐Evaluating Water Column Reoxygenation During the End Permian Mass Extinction DOI Creative Commons
Fan Yang, Sen Li,

Ki-Seon An

et al.

Geochemistry Geophysics Geosystems, Journal Year: 2024, Volume and Issue: 25(10)

Published: Oct. 1, 2024

Abstract Ocean anoxia is considered a key driver of the end‐Permian mass extinction (EPME). However, it much debated whether there was an ocean reoxygenation phase during, and in aftermath, EPME. Evidence for often inferred from absence framboidal pyrite some boundary marine sediments (termed “framboid gap”). To reconstruct redox evolution across EPME, we investigated carbon isotopic, sedimentological, records Ruichang Ehtan sections South China. These documents two negative δ 13 C carb excursions development associated with deepening leading up to Permian‐Triassic boundary. Above level at which most siliceous organisms became extinct, framboid iron proxies indicate that water column conditions were predominantly oxygenated but sporadically anoxic/ferruginous [non‐sulfidic, free Fe(II) water] Ruichang, while ferruginous more widely developed Ehtan. contrasting states are characteristic dynamic landscape interval. The gap” seen strata deposited under both oxic conditions, suggesting availability decomposable organic matter sulfate reduction additionally controlled genesis. Our data confirm deep basins during

Language: Английский

δ13Corg record from the Latest Permian to Middle Triassic in the middle paleo-latitude Western Canada Sedimentary Basin: Global correlation and environmental implications DOI
Hao Zhu,

Guijie Zhang,

Menghan Li

et al.

Palaeogeography Palaeoclimatology Palaeoecology, Journal Year: 2025, Volume and Issue: unknown, P. 112741 - 112741

Published: Jan. 1, 2025

Language: Английский

Citations

0
A refined biochemostratigraphic framework for the Induan DOI
Sakineh Arefifard, Thomas J. Algeo, Feifei Zhang

et al.

Palaeogeography Palaeoclimatology Palaeoecology, Journal Year: 2025, Volume and Issue: unknown, P. 112902 - 112902

Published: March 1, 2025

Language: Английский

Citations

0
Dynamics of nutrient cycles in the Permian–Triassic oceans DOI
Yadong Sun

Earth-Science Reviews, Journal Year: 2024, Volume and Issue: 258, P. 104914 - 104914

Published: Sept. 4, 2024

Language: Английский

Citations

2
Large nitrogen cycle perturbations during the Early Triassic hyperthermal DOI
Yong Du, Huyue Song,

Eva E. Stüeken

et al.

Geochimica et Cosmochimica Acta, Journal Year: 2024, Volume and Issue: 382, P. 13 - 25

Published: Aug. 12, 2024

Language: Английский

Citations

0
Re‐Evaluating Water Column Reoxygenation During the End Permian Mass Extinction DOI Creative Commons
Fan Yang, Sen Li,

Ki-Seon An

et al.

Geochemistry Geophysics Geosystems, Journal Year: 2024, Volume and Issue: 25(10)

Published: Oct. 1, 2024

Abstract Ocean anoxia is considered a key driver of the end‐Permian mass extinction (EPME). However, it much debated whether there was an ocean reoxygenation phase during, and in aftermath, EPME. Evidence for often inferred from absence framboidal pyrite some boundary marine sediments (termed “framboid gap”). To reconstruct redox evolution across EPME, we investigated carbon isotopic, sedimentological, records Ruichang Ehtan sections South China. These documents two negative δ 13 C carb excursions development associated with deepening leading up to Permian‐Triassic boundary. Above level at which most siliceous organisms became extinct, framboid iron proxies indicate that water column conditions were predominantly oxygenated but sporadically anoxic/ferruginous [non‐sulfidic, free Fe(II) water] Ruichang, while ferruginous more widely developed Ehtan. contrasting states are characteristic dynamic landscape interval. The gap” seen strata deposited under both oxic conditions, suggesting availability decomposable organic matter sulfate reduction additionally controlled genesis. Our data confirm deep basins during

Language: Английский

Citations

0