Pre-biotic carbon dioxide on Earth originated primarily from mantle degassing and volcanic outgassing
the verdict
SUPPORTED
the evidence backs this
confidence 82/100
Geological and geochemical evidence indicates that pre-biotic carbon dioxide on Earth was primarily driven by mantle degassing and volcanic outgassing following events like the Moon-forming impact.
Evidence for · 2
The Moon-Forming Impact and the Autotrophic Origin of Life.
2023 · cited by 10
Paper [5] explains how the Moon-forming impact melted Earth's mantle, causing carbon dioxide to degas into the atmosphere and establish early planetary carbon reservoirs.
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More for · 1
Processes of the Long-Term Carbon Cycle: Degassing of Carbon Dioxide and Methane
2004 · cited by 0
Paper [10] outlines the long-term carbon cycle processes, noting that volcanic and mantle degassing are primary mechanisms for restoring carbon dioxide to the Earth's surficial system.