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DOI10.1038/s41561-023-01133-2
Oxygenation of the Earth aided by mineral-organic carbon preservation
Zhao, Mingyu; Mills, Benjamin J. W.; Homoky, William B. B.; Peacock, Caroline L. L.
发表日期2023
ISSN1752-0894
EISSN1752-0908
起始页码262
结束页码+
卷号16期号:3页码:8
英文摘要Photosynthesis produces molecular oxygen, but it is the burial of organic carbon in sediments that has allowed this O-2 to accumulate in Earth's atmosphere. Yet many direct controls on the preservation and burial of organic carbon have not been explored in detail. For modern Earth, it is known that reactive iron phases are important for organic carbon preservation, suggesting that the availability of particulate iron could be an important factor for the oxygenation of the oceans and atmosphere over Earth history. Here we develop a theoretical model to investigate the effect of mineral-organic preservation on the oxygenation of the Earth, supported by a proxy compilation for terrigenous inputs and the burial of reactive iron phases, and find that changes to the rate of iron input to the global ocean constitute an independent control on atmosphere-ocean O-2 and marine sulfate levels. We therefore suggest that increasing continental exposure and denudation may have helped fuel the rise in atmospheric O-2 and other oxidants over Earth history. Finally, we show that inclusion of mineral-organic preservation makes the global marine O-2 reservoir more resilient to changes in nutrient levels by breaking the link between productivity and organic carbon burial. We conclude that mineral-organic preservation is an important missing process in current assessments of Earth's long-term carbon cycle. Iron input into the ocean is a key control on mineral-organic preservation, and therefore the accumulation of oxygen in Earth's atmosphere, according to a theoretical model and supported by proxy records for iron phases and cycling.
学科领域Geosciences, Multidisciplinary
语种英语
WOS研究方向Geology
WOS记录号WOS:000943857100001
来源期刊NATURE GEOSCIENCE
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/272559
作者单位University of Leeds; Chinese Academy of Sciences; Institute of Geology & Geophysics, CAS
推荐引用方式
GB/T 7714
Zhao, Mingyu,Mills, Benjamin J. W.,Homoky, William B. B.,et al. Oxygenation of the Earth aided by mineral-organic carbon preservation[J],2023,16(3):8.
APA Zhao, Mingyu,Mills, Benjamin J. W.,Homoky, William B. B.,&Peacock, Caroline L. L..(2023).Oxygenation of the Earth aided by mineral-organic carbon preservation.NATURE GEOSCIENCE,16(3),8.
MLA Zhao, Mingyu,et al."Oxygenation of the Earth aided by mineral-organic carbon preservation".NATURE GEOSCIENCE 16.3(2023):8.
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