ArticleProceedings of the National Academy of Sciences of the United States of America2019
Global atmospheric oxygen variations recorded by Th/U systematics of igneous rocks.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed.
- Marine phosphorus and atmospheric oxygen were coupled during the Great Oxidation Event.Nature communications · 2025Article
- The constant oxidation state of Earth's mantle since the Hadean.Nature communications · 2024Article
- Chapter 5: Major Biological Innovations in the History of Life on Earth.Astrobiology · 2024Article
- Recycled selenium in hot spot-influenced lavas records ocean-atmosphere oxygenation.Science advances · 2020Article
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Abstract
Atmospheric oxygen has evolved from negligible levels in the Archean to the current level of about 21% through 2 major step rises: The Great Oxidation Event (GOE) in the early Proterozoic and the Neoproterozoic Oxygenation Event (NOE) during the late Proterozoic. However, most previous methods for constraining the time of atmospheric oxygenation have relied on evidence from sedimentary rocks. Here, we investigate the temporal variations of the Th/U of arc igneous rocks since 3.0 billion y ago (Ga) and show that 2 major Th/U decreases are recorded at ca. 2.35 Ga and ca. 0.75 Ga, coincident with the beginning of the GOE and NOE. The decoupling of U from Th is predominantly caused by the significant rise of atmospheric oxygen. Under an increasingly oxidized atmosphere condition, more uranium in the surface environment became oxidized from the water-insoluble U
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