Uranium isotope evidence for temporary ocean oxygenation in the aftermath of the Sturtian Snowball Earth

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• 作者：Kimberly V. Lau^a ; ^{kvlau@stanford.edu} ; Francis A. Macdonald^b ; Kate Maher^a ; Jonathan L. Payne^a
• 关键词：Neoproterozoic ; paleoredox ; uranium isotopes ; Cryogenian ; Snowball Earth glaciation
• 刊名：Earth and Planetary Science Letters
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：458
• 期：Complete
• 页码：282-292
• 全文大小：2207 K
• 卷排序：458

文摘

We use uranium isotopes to infer changes in global redox in the Cryogenian ocean. Our data support a temporary oxygenation event following the Sturtian glaciation. A return to extensive anoxia is coincident with a large negative δ13Cδ13C excursion. These shifts in seafloor redox conditions may have hampered metazoan evolution.