Cited by 613Geological and Geochemical AnalysisAstro and Planetary SciencePaleontology and Stratigraphy of Fossils

The oxidation state of Hadean magmas and implications for early Earth’s atmosphere

Trail, Dustin, Watson, E. Bruce, Tailby, Nicholas D.·2011·Nature

Abstract

Magmatic outgassing of volatiles from Earth's interior probably played a critical part in determining the composition of the earliest atmosphere, more than 4,000 million years (Myr) ago. Given an elemental inventory of hydrogen, carbon, nitrogen, oxygen and sulphur, the identity of molecular species in gaseous volcanic emanations depends critically on the pressure (fugacity) of oxygen. Reduced melts having oxygen fugacities close to that defined by the iron-wüstite buffer would yield volatile species such as CH(4), H(2), H(2)S, NH(3) and CO, whereas melts close to the fayalite-magnetite-quartz buffer would be similar to present-day conditions and would be dominated by H(2)O, CO(2), SO(2) and N(2) (refs 1-4). Direct constraints on the oxidation state of terrestrial magmas before 3,850 Myr before present (that is, the Hadean eon) are tenuous because the rock record is sparse or absent. Samples from this earliest period of Earth's history are limited to igneous detrital zircons that pre-date the known rock record, with ages approaching ∼4,400 Myr (refs 5-8). Here we report a redox-sensitive calibration to determine the oxidation state of Hadean magmatic melts that is based on the incorporation of cerium into zircon crystals. We find that the melts have average oxygen fugacities that are consistent with an oxidation state defined by the fayalite-magnetite-quartz buffer, similar to present-day conditions. Moreover, selected Hadean zircons (having chemical characteristics consistent with crystallization specifically from mantle-derived melts) suggest oxygen fugacities similar to those of Archaean and present-day mantle-derived lavas as early as ∼4,350 Myr before present. These results suggest that outgassing of Earth's interior later than ∼200 Myr into the history of Solar System formation would not have resulted in a reducing atmosphere.

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Crossref · 10.1038/nature10655

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  • The reducing atmosphere scenario of early Earth, on which the Oparin-Haldane hypothesis is based, has been challenged.

    “However, the reducing atmosphere scenario of early Earth (on which the Oparin-Haldane hypothesis is based) have been challenged”

    From The Emergence of Life (2019) · cites this paper as Trail et al. 2011

  • Earth's native atmosphere was more oxidizing than the Miller atmosphere.

    “Unfortunately, current theory holds that Earth’s native atmosphere was more oxidizing than the Miller atmosphere.”
  • Nitrogen in Earth's native atmosphere was more likely present as N2, not ammonia.

    “Nitrogen was more likely present as dinitrogen (N2), not ammonia.”
  • Carbon in Earth's native atmosphere was more likely present as CO2, not methane.

    “Carbon was more likely present as carbon dioxide (CO2), not methane.”
  • Analysis of the late veneer starts with a generally accepted premise that the reducing power of early Earth was quickly lost early by the gravitational sinking of heavy metallic iron to its core.

    “Analysis of the late veneer starts with a generally accepted premise that the reducing power of early Earth was quickly lost early by the gravitational sinking of heavy metallic iron to its core. This is attested by the aforementioned high oxidation state of the early Earth mantle.”

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Authors
Trail, D., Watson, E. B., & Tailby, N. D.
Affiliations
Rensselaer Polytechnic Institute (US)
Corresponding author
Trail, Dustin
Venue
Nature
Published
2011-11-30
Volume
480
Issue
7375
Pages
79-82
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2031928338
Cited by
613
References
35
Citations by year
2026: 42 · 2025: 49 · 2024: 49 · 2023: 44 · 2022: 40 · 2021: 46 · 2020: 56 · 2019: 64 · 2018: 49 · 2017: 50 · 2016: 31 · 2015: 22 · 2014: 31 · 2013: 24 · 2012: 13
FWCI
19.70
Type
journal article
Language
en
Open access
closed
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Funders
NASA Astrobiology Institute
Topics
  • Physical Sciences › Earth and Planetary Sciences › Geophysics › Geological and Geochemical Analysis
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astro and Planetary Science
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
Keywords
oxidation state, early Earth atmosphere, oxygen fugacity, zircon, cerium incorporation, iron-wüstite buffer, volatile outgassing, detrital zircon, mantle oxidation state
MeSH terms
Atmosphere, Oxidation-Reduction, Earth, Planet, Volcanic Eruptions

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