期刊
NATURE COMMUNICATIONS
卷 7, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms12236
关键词
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资金
- Edinburgh University Principal's Career Development Scholarship
- International Centre for Carbonate Reservoirs
- Moray Endowment Award
- Natural Environment Research Council (NERC) through the 'Co-evolution of Life and the Planet' scheme
- Austrian National Committee (Austrian Academy of Sciences) [572]
- Natural Environment Research Council [NE/I005862/2] Funding Source: researchfish
- NERC [NE/I005862/2, NE/I005935/1] Funding Source: UKRI
The end-Permian mass extinction, similar to 252 million years ago, is notable for a complex recovery period of similar to 5 Myr. Widespread euxinic (anoxic and sulfidic) oceanic conditions have been proposed as both extinction mechanism and explanation for the protracted recovery period, yet the vertical distribution of anoxia in the water column and its temporal dynamics through this time period are poorly constrained. Here we utilize Fe-S-C systematics integrated with palaeontological observations to reconstruct a complete ocean redox history for the Late Permian to Early Triassic, using multiple sections across a shelf-to-basin transect on the Arabian Margin (Neo-Tethyan Ocean). In contrast to elsewhere, we show that anoxic non-sulfidic (ferruginous), rather than euxinic, conditions were prevalent in the Neo-Tethys. The Arabian Margin record demonstrates the repeated expansion of ferruginous conditions with the distal slope being the focus of anoxia at these times, as well as short-lived episodes of oxia that supported diverse biota.
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