The dual origin of the terrestrial atmosphere

  title={The dual origin of the terrestrial atmosphere},
  author={Nicolas Dauphas},
  • N. Dauphas
  • Published 28 June 2003
  • Physics, Geology
  • Icarus

Figures and Tables from this paper

Isotopic constraints on the origin and nature of primitive material in the Solar System and on early Earth

The Earth formed some 4.5 Ga from the accumulation of dust, rocks and gas. The composition of these primitive materials is today recorded in meteorites. However, the origin of volatile elements

The origin of the terrestrial noble-gas signature

It is suggested that crystallization of perovskite from a magma ocean in the very early stages of Earth’s history concentrated argon in the lower mantle, whereas the xenon solubility in MgSiO3 perovSkite is orders of magnitude lower.


The difference between the measured atmospheric abundances of neon, argon, krypton, and xenon for Venus, Earth, and Mars is striking. Because these abundances drop by at least 2 orders of magnitude

Atmospheres on the terrestrial planets: Clues to origin and evolution

What CO2 well gases tell us about the origin of noble gases in the mantle and their relationship to the atmosphere

  • C. BallentineG. Holland
  • Geology, Environmental Science
    Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
  • 2008
These observations do not support models in which the terrestrial mantle acquired its volatiles from the primary capture of solar nebula gases and, in turn, strongly suggest that the primary terrestrial atmosphere is most probably derived from degassed trapped volatile in accreting material.



On the Isotopic Composition of Primordial Xenon in Terrestrial Planet Atmospheres

  • R. Pepin
  • Physics, Environmental Science
  • 2000
Xenon plays a crucial role in models of atmospheric evolution in which noble gases are fractionated from their initial compositions to isotopically heavier distributions by early hydrodynamic escape

The xenon isotopic composition of the primordial Martian atmosphere : Contributions from solar and fission components

Previous models of the evolution of the isotopic composition of Xe in the Martian atmosphere have little room for any Xe produced by fission of 244 Pu, although there is a contribution from the decay

The composition of the atmosphere at the surface of Mars

We have confirmed the discovery of N2 and 40Ar by the Entry Science Team, and we have also detected Ne, Kr, Xe, and the primordial isotopes of Ar. The noble gases exhibit an abundance pattern similar

Possible solar noble-gas component in Hawaiian basalts

THE noble-gas elemental and isotopic composition in the Earth is significantly different from that of the present atmosphere, and provides an important clue to the origin and history of the Earth and

Possible cometary origin of heavy noble gases in the atmospheres of Venus, Earth and Mars

It is proposed here that the noble gases in the atmospheres of all of the terrestrial planets are dominated by a mixture of an internal component and a contribution from impacting icy planetesimals (comets), illustrating the importance of impacts in determining the volatile inventories of these planets.

Formation and early evolution of the atmosphere

Abstract The tectonic activity of the Earth allowed exchange of volatile elements (H, C, N, rare gases) between the surface of the Earth (atmosphere, crust, sediments, oceans) and the mantle.

Comets, impacts, and atmospheres.

A mixture of three basic types of comets appears capable of accounting for the observed volatile inventories on Venus, Earth, and Mars, with the caveat that impact erosion is necessary to explain the present condition of the martian atmosphere.

Xenon fractionation in porous planetesimals.

Origin of Noble Gases in the Terrestrial Planets

Identifying the mechanisms that drove the evolution of planetary volatiles from primordial to present-day compositions is one of the classic challenges in the planetary sciences. The field bristles