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The APATE project studies the isotopic composition of neon in the Earth's mantle to understand the origins of Earth's primordial atmosphere. It explores how gases from the proto-planetary disk or solar wind may have contributed to the early atmosphere and its effects on Earth's composition.
The existence of an atmosphere enriched in H and He around the Earth as it formed has often been proposed.
One hypothesis suggests that it could have been captured from the gas present in the proto-planetary disk, before its evaporation.
Subsequently, a secondary atmosphere would have been degassed or brought in by a late veneer of chondritic/cometary material.
Although this model is regularly evoked using giant planets for comparison, there is no geological proof for its existence, except possi…
UNIVERSITE D'ORLEANS
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