Rare gas systematics in popping rock: isotopic and elemental compositions in the upper mantle - PubMed (original) (raw)
Rare gas systematics in popping rock: isotopic and elemental compositions in the upper mantle
M Moreira et al. Science. 1998.
Abstract
New experimental data on the isotopic variations of neon, argon, and xenon in a popping rock imply that the 40Ar/36Ar ratio of the upper mantle is less than 44,000 and that the 129Xe/130Xe ratio is less than 8.2. The elemental abundance pattern of rare gases is chondritic-like and is quite distinct from the solar pattern. These data imply that Earth accreted from planetesimals that probably underwent a transformation of their rare gas budget from solar- to chondritic-like, leaving the isotopic composition unchanged from the solar pattern.
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