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Global atmospheric oxygen variations recorded by Th/U systematics of igneous rocks

Liu, He; Zartman, Robert; Ireland, Trevor; Sun, Weidong


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...[Show more]

CollectionsANU Research Publications
Date published: 2019
Type: Journal article
Source: PNAS - Proceedings of the National Academy of Sciences of the United States of America
DOI: 10.1073/pnas.1902833116
Access Rights: Open Access


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