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

Proc Natl Acad Sci U S A · 2019 · PMC6754606 · PMID 31481607

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a decreasing trendno p-value reported

The plotting of the Rittmann Index (σ), a petrological indicator associated with the degrees of mantle melting ( 58 ), of arc rocks through time also shows a decreasing trend of melting degrees since ca. 3.0 Ga ( SI Appendix , Fig.

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