Tectonic implications of radiogenic noble gases in planetary atmospheres

Computer Science

Scientific paper

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Planetary Atmospheres, Planetary Evolution, Rare Gases, Tectonics, Terrestrial Planets, Argon Isotopes, Helium Isotopes, Lunar Crust, Lunar Evolution, Planetary Mantles, Planets, Tectonics, Rare Gases, Atmosphere, Radiogenic Material, Crust, Isotopes, Helium 4, Argon 40, Interior, Isotopic Ratios, Mantle, Moon, Outgassing, Comparisons, Hypotheses, Terrestrial Planets, Earth, Mars, Origin, Volcanism, Collisions, Models, Venus

Scientific paper

Measurements of the quantity of noble gases in the atmospheres of the terrestrial planets and the Moon provide important constraints on the dynamics of atmosphere formation and loss. In this paper the authors are primarily concerned with the implications of long-lived radiogenic isotopes on the tectonics of planetary interiors. They focus their attention on the systematics of 4He and 40Ar that are produced by the principal heat-producing isotopes 238U, 235U, 232Th, and 40K. The efficiency of escape of these noble gas isotopes can provide insights into both transport mechanisms and internal processes.

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