气候变化领域集成服务门户(CCPortal): Fully oxygenated water columns over continental shelves before the Great Oxidation Event

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DOI	10.1038/s41561-019-0309-7
	Fully oxygenated water columns over continental shelves before the Great Oxidation Event
	Ostrander C.M.; Nielsen S.G.; Owens J.D.; Kendall B.; Gordon G.W.; Romaniello S.J.; Anbar A.D.
发表日期	2019
ISSN	17520894
卷号	12 期号:3
英文摘要	Late Archaean sedimentary rocks contain compelling geochemical evidence for episodic accumulation of dissolved oxygen in the oceans along continental margins before the Great Oxidation Event. However, the extent of this oxygenation remains poorly constrained. Here we present thallium and molybdenum isotope compositions for anoxic organic-rich shales of the 2.5-billion-year-old Mount McRae Shale from Western Australia, which previously yielded geochemical evidence of a transient oxygenation event. During this event, we observe an anticorrelation between thallium and molybdenum isotope data, including two shifts to higher molybdenum and lower thallium isotope compositions. Our data indicate pronounced burial of manganese oxides in sediments elsewhere in the ocean at these times, which requires that the water columns above portions of the ocean floor were fully oxygenated—all the way from the air–sea interface to well below the sediment–water interface. Well-oxygenated continental shelves were probably the most important sites of manganese oxide burial and mass-balance modelling results suggest that fully oxygenated water columns were at least a regional-scale feature of early Earth’s oceans 2.5 billion years ago. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
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/124703
作者单位	School of Earth and Space Exploration, Arizona State University, Tempe, AZ, United States; NIRVANA Laboratories, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Department of Earth, Ocean, and Atmospheric Science, National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, United States; Department of Earth and Environmental Sciences, University of Waterloo, Waterloo, ON, Canada; School of Molecular Sciences, Arizona State University, Tempe, AZ, United States
推荐引用方式 GB/T 7714	Ostrander C.M.,Nielsen S.G.,Owens J.D.,et al. Fully oxygenated water columns over continental shelves before the Great Oxidation Event[J],2019,12(3).
APA	Ostrander C.M..,Nielsen S.G..,Owens J.D..,Kendall B..,Gordon G.W..,...&Anbar A.D..(2019).Fully oxygenated water columns over continental shelves before the Great Oxidation Event.Nature Geoscience,12(3).
MLA	Ostrander C.M.,et al."Fully oxygenated water columns over continental shelves before the Great Oxidation Event".Nature Geoscience 12.3(2019).