globalchange  > 气候变化与战略
DOI: 10.1038/s41561-020-0558-5
论文题名:
Palaeoproterozoic oxygenated oceans following the Lomagundi–Jatuli Event
作者: Mänd K.; Lalonde S.V.; Robbins L.J.; Thoby M.; Paiste K.; Kreitsmann T.; Paiste P.; Reinhard C.T.; Romashkin A.E.; Planavsky N.J.; Kirsimäe K.; Lepland A.; Konhauser K.O.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2020
卷: 13, 期:4
起始页码: 302
结束页码: 306
语种: 英语
英文关键词: biogeochemical cycle ; Cambrian ; carbon isotope ; concentration (composition) ; organic carbon ; oxygen ; Proterozoic ; trace metal
英文摘要: The approximately 2,220–2,060 million years old Lomagundi–Jatuli Event was the longest positive carbon isotope excursion in Earth history and is traditionally interpreted to reflect an increased organic carbon burial and a transient rise in atmospheric O2. However, it is widely held that O2 levels collapsed for more than a billion years after this. Here we show that black shales postdating the Lomagundi–Jatuli Event from the approximately 2,000 million years old Zaonega Formation contain the highest redox-sensitive trace metal concentrations reported in sediments deposited before the Neoproterozoic (maximum concentrations of Mo = 1,009 μg g−1, U = 238 μg g−1 and Re = 516 ng g−1). This unit also contains the most positive Precambrian shale U isotope values measured to date (maximum 238U/235U ratio of 0.79‰), which provides novel evidence that there was a transition to modern-like biogeochemical cycling during the Palaeoproterozoic. Although these records do not preclude a return to anoxia during the Palaeoproterozoic, they uniquely suggest that the oceans remained well-oxygenated millions of years after the termination of the Lomagundi–Jatuli Event. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169644
Appears in Collections:气候变化与战略

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作者单位: Department of Earth & Atmospheric Sciences, University of Alberta, Edmonton, AB, Canada; Department of Geology, University of Tartu, Tartu, Estonia; CNRS–UMR6538 Laboratoire Géosciences Océan, European Institute for Marine Studies, Plouzané, France; Department of Geology & Geophysics, Yale University, New Haven, CT, United States; CAGE—Centre for Arctic Gas Hydrate, Environment and Climate, Department of Geosciences, UiT The Arctic University of Norway, Tromsø, Norway; School of Earth and Atmospheric Sciences, Georgia Tech, Atlanta, GA, United States; NASA Astrobiology Institute Alternative Earths Team, University of California, Riverside, CA, United States; Institute of Geology, Karelian Science Centre, Petrozavodsk, Russian Federation; Geological Survey of Norway (NGU), Trondheim, Norway; Department of Geology, Tallinn University of Technology, Tallinn, Estonia

Recommended Citation:
Mänd K.,Lalonde S.V.,Robbins L.J.,et al. Palaeoproterozoic oxygenated oceans following the Lomagundi–Jatuli Event[J]. Nature Geoscience,2020-01-01,13(4)
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