ArticleScience advances2023
I/Pu reveals Earth mainly accreted from volatile-poor differentiated planetesimals.
Article in Science advances, 2023. 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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Who cites it
4 citing papers in PubMed, 15 citations in OpenAlex.
- Phosphorus-nitrogen systematics of first-generation planetesimals constrain life-essential element delivery to Earth.Science advances · 2026Article
- Accretion of volatile elements on Earth without the need of a late veneer.Science advances · 2026Article
- Differentiated planetesimals record differing sources of sulfur in inner and outer solar system materials.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Radiogenic heating sustains long-lived volcanism and magnetic dynamos in super-Earths.Science advances · 2024Article
Corrections and comments
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Authors and funding
6 authors at 5 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The observation that mid-ocean ridge basalts had ~3× higher iodine/plutonium ratios (inferred from xenon isotopes) compared to ocean island basalts holds critical insights into Earth's accretion. Understanding whether this difference stems from core formation alone or heterogeneous accretion is, however, hindered by the unknown geochemical behavior of plutonium during core formation. Here, we use first-principles molecular dynamics to quantify the metal-silicate partition coefficients of iodine and plutonium during core formation and find that both iodine and plutonium partly partition into metal liquid. Using multistage core formation modeling, we show that core formation alone is unlikely to explain the iodine/plutonium difference between mantle reservoirs. Instead, our results reveal a heterogeneous accretion history, whereby predominant accretion of volatile-poor differentiated planetesimals was followed by a secondary phase of accretion of volatile-rich undifferentiated meteorites. This implies that Earth inherited part of its volatiles, including its water, from late accretion of chondrites, with a notable carbonaceous chondrite contribution.
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Registered trials
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