Rare Gas Systematics in Popping Rock: Isotopic and Elemental Compositions in the Upper Mantle-Reference-Cited by-同舟云学术

Rare Gas Systematics in Popping Rock: Isotopic and Elemental Compositions in the Upper Mantle

Published:1998-02-20 Issue:5354 Volume:279 Page:1178-1181
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Moreira Manuel¹,Kunz Joachim¹,Allègre Claude¹

Affiliation:

1. Université Denis Diderot-Paris 7, Laboratoire de Géochimie et Cosmochimie, Institut de Physique du Globe de Paris, CNRS Unité de Recherche Associée Number 1758, 4 Place Jussieu, 75252 Paris Cedex 05, France.

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.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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