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This research examines how the assembly of silicates influenced the early anoxic environment of Earth’s surface.

July 28, 2026Open Access

The Silicate Bridge: Low-Pressure Percolation, Inherited Redox, and the Onset of the Anoxic Iron-Silicate Ocean

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Randomized trial links silicate assembly to Earth's anoxic iron-silicate conditions, indicating abiotic processes in early ocean formation.

This research examines how the assembly of silicates influenced the early anoxic environment of Earth’s surface.
Experimental data analyzed on silicate percolation at low pressure (≤1.0–1.5 GPa).
Modeling of thermal and chemical conditions during core formation and impact events.
Assessment of detrital zircons and their oxygen isotope ratios to infer early water interactions.
Demonstrated that percolation at low pressures aids embryonic core formation before global melting.
Quantified shifts in mantle oxygen fugacity values from ΔIW ≈ –4 to –2.5, indicating changes in redox states.
Mapped out the conditions leading to the formation of an anoxic secondary atmosphere through continuous redox transfer.

Venerable et al. (2026) studied this question.

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Randomized trial links silicate assembly to Earth's anoxic iron-silicate conditions, indicating abiotic processes in early ocean formation.