Abstract : The accretion of hydrous-carbonaceous meteoroids with sizes of 50-200 µm rightly predicts the total burdens of 20Ne and 132Xe in the terrestrial atmosphere. However, the huge excesses of both 36Ar and 84Kr (15×) required additional "spikes" of cometary gases.
M. Maurette. Cracking the Elemental Genetic Code of the Atmospheric Noble Gases: The "Missing" 36Ar and 84Kr. 41st Lunar and Planetary Science Conference, Mar 2010, The woodlands, United States. pp.1114. ⟨in2p3-00681443⟩