New research suggests early Earth had a highly oxidized magma ocean, leading to a CO2 and SO2-rich atmosphere. The subsequent accretion of reducing materials was critical for creating a habitable environment. Elucidating the atmosphere and surface environment of the early Earth, especially before
Research has provided new insights into the atmosphere of early Earth, suggesting it was formed by degassing volatiles from a magma ocean with a higher oxidation state than previously believed. The study found that the early Earth’s magma ocean had ten times the Fe3+ content of today’s upper mantle, resulting in an atmosphere rich in CO2 and SO2.-rich atmosphere. The subsequent accretion of reducing materials was critical for creating a habitable environment.
Elucidating the atmosphere and surface environment of the early Earth, especially before the origin of life, is crucial for understanding the habitability of the Earth. The atmosphere of terrestrial planets has been thought to be formed by degassing volatiles from the interior and its composition is mainly controlled by the oxidation state of the mantle.
The bright area at the center of the image shows quenched metallic melt and the surrounding grey area indicates quenched silicate melt. The sample was encapsulated into a graphite capsule, which is transformed into diamond during heating experiments.
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