Gas capture and rare gas retention by accreting planets in the solar nebula

Details Gas capture and rare gas retention by accreting planets in the solar nebula Gas capture and rare gas retention by accreting planets in the solar nebula

Aug 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982p%26ss...30..765m&link_type=abstract

(IAU, IAMAP, and COSPAR, Joint Meeting on the Origin and Evolution of Planetary Atmospheres, Hamburg, West Germany, Aug. 17, 18,

Physics

12

Capture Effect, Planetary Nebulae, Primitive Earth Atmosphere, Protoplanets, Rare Gases, Solar System, Dissolved Gases, Earth (Planet), Neon Isotopes, Planetary Atmospheres, Planetary Mass

Scientific paper

In this paper, the physico-chemical effects of the nebula gas on the planets are reviewed from a standpoint of planetary formation in the solar nebula. The proto-earth growing in the nebula was surrounded by a primordial atmosphere with a solar chemical composition and solar isotopic composition. When the mass of the proto-earth was greater than 0.3 times the present earth mass, the surface was molten because of the blanketing effect of the atmosphere. Therefore, the primordial rare gases contained in the primordial atmosphere dissolved into the molten earth material without fractionation and in particular the dissolved neon is expected to be conserved in the present earth material. Hence, if dissolved neon with a solar isotopic ratio is discovered in the earth material, it will indicate that the earth was formed in the nebula and that the dissolved rare gases were one of the sources which degassed to form the present atmosphere.

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