Rare Gas Systematics in Popping Rock: Isotopic and Elemental Compositions in the Upper Mantle
Authors:
- 20 February 1998
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 279 (5354) , 1178-1181
Abstract
New experimental data on the isotopic variations of neon, argon, and xenon in a popping rock imply that the 40 Ar/ 36 Ar ratio of the upper mantle is less than 44,000 and that the 129 Xe/ 130 Xe 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.Keywords
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